v13.0.0-4 -- distribution files

Making documentation consistent

.babelrc

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    ["latest", {
+      "es2015": {
+        "modules": false
+      }
+    }]
+  ],
+  "plugins": [
+    "external-helpers"
+  ]
+}

.bowerrc

@@ -1,3 +0,0 @@
-{
- "directory": "../"
-}

.flowconfig

@@ -0,0 +1,12 @@
+[ignore]
+.*/node_modules/.*
+.*/dist/.*
+.*/build/.*
+
+[include]
+./src/
+
+[libs]
+./declarations/
+
+[options]

.gitignore

@@ -1,6 +1,3 @@
-/node_modules/
+node_modules
 bower_components
-.directory
-.c9
-.codio
-.settings
+/y.*

.travis.yml

@@ -1,11 +0,0 @@
-language: node_js
-before_install:
-  - "npm install -g bower coffee-script"
-  - "bower install"
-node_js:
-  - "0.12"
-  - "0.11"
-  - "0.10"
-branches:
-  only:
-    - master

LICENSE

@@ -1,6 +1,8 @@
 The MIT License (MIT)
 
-Copyright (c) 2014 Kevin Jahns <kevin.jahns@rwth-aachen.de>.
+Copyright (c) 2014
+  - Kevin Jahns <kevin.jahns@rwth-aachen.de>.
+  - Chair of Computer Science 5 (Databases & Information Systems), RWTH Aachen University, Germany
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,137 +1,294 @@
 
-# ![Yjs](http://y-js.org/files/layout/yjs.svg)
+# ![Yjs](http://y-js.org/images/yjs.png)
 
-[![Build Status](https://travis-ci.org/y-js/yjs.svg)](https://travis-ci.org/y-js/yjs)
+Yjs is a framework for offline-first p2p shared editing on structured data like
+text, richtext, json, or XML. It is fairly easy to get started, as Yjs hides
+most of the complexity of concurrent editing. For additional information, demos,
+and tutorials visit [y-js.org](http://y-js.org/).
 
-Yjs is a framework for optimistic concurrency control and automatic conflict resolution on arbitrary data types. The framework implements a new OT-like concurrency algorithm and provides similar functionality as [ShareJs] and [OpenCoweb]. Yjs was designed to handle concurrent actions on arbitrary complex data types like Text, Json, and XML. We provide a tutorial and some applications for this framework on our [homepage](http://y-js.org/).
+### Extensions
+Yjs only knows how to resolve conflicts on shared data. You have to choose a ..
+* *Connector* - a communication protocol that propagates changes to the clients
+* *Database* - a database to store your changes
+* one or more *Types* - that represent the shared data
 
-You can create you own data types easily. Therefore, you can take matters into your own hand by defining the meaning of the shared types and ensure that it is valid, while Yjs ensures data consistency (everyone will eventually end up with the same data). We already provide data types for
+Connectors, Databases, and Types are available as modules that extend Yjs. Here
+is a list of the modules we know of:
 
-| Name                                                 | Description
-| ---------------------------------------------------- | ---------------------------------------------
-y-object | Add, update, and remove properties of an object. Circular references are supported. Included in Yjs
-[y-list](https://github.com/y-js/y-list) | A shared linked list implementation. Circular references are supported
-[y-selections](https://github.com/y-js/y-selections) | Manages selections on types that use linear structures (e.g. the y-list type). You can select a range of elements and assign meaning to them.
-[y-xml](https://github.com/y-js/y-xml) | An implementation of the DOM. You can create a two way binding to Browser DOM objects
-[y-text](https://github.com/y-js/y-text) | Collaborate on text. You can create a two way binding to textareas, input elements, or HTML elements (e.g. *h1*, or *p*)
-[y-richtext](https://github.com/y-js/y-richtext) | Collaborate on rich text. You can create a two way binding to several editors
+##### Connectors
 
-Unlike other frameworks, Yjs supports P2P message propagation and is not bound to a specific communication protocol. Therefore, Yjs is extremely scalable and can be used in a wide range of application scenarios.
+|Name            | Description               |
+|----------------|-----------------------------------|
+|[webrtc](https://github.com/y-js/y-webrtc) | Propagate updates Browser2Browser via WebRTC|
+|[websockets](https://github.com/y-js/y-websockets-client) | Set up [a central server](https://github.com/y-js/y-websockets-client), and connect to it via websockets |
+|[xmpp](https://github.com/y-js/y-xmpp) | Propagate updates in a XMPP multi-user-chat room ([XEP-0045](http://xmpp.org/extensions/xep-0045.html))|
+|[test](https://github.com/y-js/y-test) | A Connector for testing purposes. It is designed to simulate delays that happen in worst case scenarios|
 
-We support several communication protocols as so called *Connectors*. You can create your own connector too - read [this wiki page](https://github.com/y-js/yjs/wiki/Custom-Connectors). Currently, we support the following communication protocols:
+##### Database adapters
 
-Name                                     | Description
----------------------------------------- | -------------------------------------------------------
-[y-xmpp](https://github.com/y-js/y-xmpp) | Propagate updates in a XMPP multi-user-chat room ([XEP-0045](http://xmpp.org/extensions/xep-0045.html))
-[y-webrtc](https://github.com/y-js/y-webrtc) | Propagate updates Browser2Browser via WebRTC
-[y-test](https://github.com/y-js/y-test) | A Connector for testing purposes. It is designed to simulate delays that happen in worst case scenarios
+|Name            | Description               |
+|----------------|-----------------------------------|
+|[memory](https://github.com/y-js/y-memory) | In-memory storage. |
+|[indexeddb](https://github.com/y-js/y-indexeddb) | Offline storage for the browser |
+|[leveldb](https://github.com/y-js/y-leveldb) | Persistent storage for node apps |
 
 
-You can use Yjs client-, and server- side. You can get it as via npm, and bower. We even provide polymer elements for Yjs!
+##### Types
 
-The advantages over similar frameworks are support for
-* .. P2P message propagation and arbitrary communication protocols
-* .. arbitrary complex data types
-* .. offline editing: Only relevant changes are propagated on rejoin (unimplemented)
-* .. AnyUndo: Undo *any* action that was executed in constant time (unimplemented)
-* .. Intention Preservation: When working on Text, the intention of your changes are preserved. This is particularily important when working offline. Every type has a notion on how we define Intention Preservation on it.
+| Name     | Description       |
+|----------|-------------------|
+|[map](https://github.com/y-js/y-map) | A shared Map implementation. Maps from text to any stringify-able object |
+|[array](https://github.com/y-js/y-array) | A shared Array implementation |
+|[xml](https://github.com/y-js/y-xml) | An implementation of the DOM. You can create a two way binding to Browser DOM objects |
+|[text](https://github.com/y-js/y-text) | Collaborate on text. Supports two way binding to the [Ace Editor](https://ace.c9.io), [CodeMirror](https://codemirror.net/), [Monaco](https://github.com/Microsoft/monaco-editor), textareas, input elements, and HTML elements (e.g. <*h1*>, or <*p*>) |
+|[richtext](https://github.com/y-js/y-richtext) | Collaborate on rich text. Supports two way binding to the [Quill Rich Text Editor](http://quilljs.com/)|
 
+##### Other
+
+| Name      | Description       |
+|-----------|-------------------|
+|[y-element](http://y-js.org/y-element/) | Yjs Polymer Element |
 
 ## Use it!
-You can find a tutorial, and examples on the [website](http://y-js.org). Furthermore, the [github wiki](https://github.com/y-js/yjs/wiki) offers more information about how you can use Yjs in your application.
-
-Either clone this git repository, install it with [bower](http://bower.io/), or install it with [npm](https://www.npmjs.org/package/yjs).
+Install Yjs, and its modules with [bower](http://bower.io/), or
+[npm](https://www.npmjs.org/package/yjs).
 
 ### Bower
 ```
-bower install y-js/yjs
+bower install --save yjs y-array % add all y-* modules you want to use
 ```
-Then you include the libraries directly from the installation folder.
+You only need to include the `y.js` file. Yjs is able to automatically require
+missing modules.  
 ```
 <script src="./bower_components/yjs/y.js"></script>
 ```
 
 ### Npm
 ```
-npm install yjs --save
+npm install --save yjs % add all y-* modules you want to use
 ```
 
-And use it like this with *npm*:
+If you don't include via script tag, you have to explicitly include all modules!
+(Same goes for other module systems)
 ```
-Y = require("yjs");
+var Y = require('yjs')
+require('y-array')(Y) // add the y-array type to Yjs
+require('y-websockets-client')(Y)
+require('y-memory')(Y)
+require('y-array')(Y)
+require('y-map')(Y)
+require('y-text')(Y)
+// ..
+// do the same for all modules you want to use
 ```
 
-# Y()
-In order to create an instance of Y, you need to have a connection object (instance of a Connector). Then, you can create a shared data type like this:
+### ES6 Syntax
 ```
-var y = new Y(connector);
+import Y from 'yjs'
+import yArray from 'y-array'
+import yWebsocketsClient from 'y-webrtc'
+import yMemory from 'y-memory'
+import yArray from 'y-array'
+import yMap from 'y-map'
+import yText from 'y-text'
+// ..
+Y.extend(yArray, yWebsocketsClient, yMemory, yArray, yMap, yText /*, .. */)
 ```
 
-
-# Y.Object
-Yjs includes only one type by default - the Y.Object type. It mimics the behaviour of a JSON Object. You can create, update, and remove properies on the Y.Object type. Furthermore, you can observe changes on this type as you can observe changes on Javascript Objects with [Object.observe](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/observe) - an ECMAScript 7 proposal which is likely to become accepted by the committee. Until then, we have our own implementation.
-
-
-##### Reference
-* Create
+# Text editing example
+Install dependencies
 ```
-var y = new Y.Object();
+bower i yjs y-memory y-webrtc y-array y-text
 ```
-* Create with existing Object
+
+Here is a simple example of a shared textarea
+```HTML
+  <!DOCTYPE html>
+  <html>
+    <body>
+      <script src="./bower_components/yjs/y.js"></script>
+      <!-- Yjs automatically includes all missing dependencies (browser only) -->
+      <script>
+        Y({
+          db: {
+            name: 'memory' // use memory database adapter.
+            // name: 'indexeddb' // use indexeddb database adapter instead for offline apps
+          },
+          connector: {
+            name: 'webrtc', // use webrtc connector
+            // name: 'websockets-client'
+            // name: 'xmpp'
+            room: 'my-room' // clients connecting to the same room share data
+          },
+          sourceDir: '/bower_components', // location of the y-* modules (browser only)
+          share: {
+            textarea: 'Text' // y.share.textarea is of type y-text
+          }
+        }).then(function (y) {
+          // The Yjs instance `y` is available
+          // y.share.* contains the shared types
+
+          // Bind `y.share.textarea` to `<textarea/>`
+          y.share.textarea.bind(document.querySelector('textarea'))
+        })
+      </script>
+      <textarea></textarea>
+    </body>
+  </html>
 ```
-var y = new Y.Object({number: 73});
+
+## Get Help & Give Help
+There are some friendly people on [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/y-js/yjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) who are eager to help, and answer questions. Please join!
+
+Report _any_ issues to the
+[Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very
+soon, if possible.
+
+# API
+
+### Y(options)
+* Y.extend(module1, module2, ..)
+  * Add extensions to Y
+  * `Y.extend(require('y-webrtc'))` has the same semantics as
+    `require('y-webrtc')(Y)`
+* options.db
+  * Will be forwarded to the database adapter. Specify the database adaper on
+    `options.db.name`.
+  * Have a look at the used database adapter repository to see all available
+    options.
+* options.connector
+  * Will be forwarded to the connector adapter. Specify the connector adaper on
+    `options.connector.name`.
+  * All our connectors implement a `room` property. Clients that specify the
+    same room share the same data.
+  * All of our connectors specify an `url` property that defines the connection
+    endpoint of the used connector.
+    * All of our connectors also have a default connection endpoint that you can
+      use for development.
+  * Set `options.connector.generateUserId = true` in order to genenerate a
+    userid, instead of receiving one from the server. This way the `Y(..)` is
+    immediately going to be resolved, without waiting for any confirmation from
+    the server. Use with caution.
+  * Have a look at the used connector repository to see all available options.
+  * *Only if you know what you are doing:* Set
+    `options.connector.preferUntransformed = true` in order receive the shared
+    data untransformed. This is very efficient as the database content is simply
+    copied to this client. This does only work if this client receives content
+    from only one client.
+* options.sourceDir (browser only)
+  * Path where all y-* modules are stored
+  * Defaults to `/bower_components`
+  * Not required when running on `nodejs` / `iojs`
+  * When using nodejs you need to manually extend Yjs:
 ```
-* Every instance of Y is an Y.Object
+var Y = require('yjs')
+// you have to require a db, connector, and *all* types you use!
+require('y-memory')(Y)
+require('y-webrtc')(Y)
+require('y-map')(Y)
+// ..
 ```
-var y = new Y(connector);
+* options.share
+  * Specify on `options.share[arbitraryName]` types that are shared among all
+    users.
+  * E.g. Specify `options.share[arbitraryName] = 'Array'` to require y-array and
+    create an y-array type on `y.share[arbitraryName]`.
+  * If userA doesn't specify `options.share[arbitraryName]`, it won't be
+    available for userA.
+  * If userB specifies `options.share[arbitraryName]`, it still won't be
+    available for userA. But all the updates are send from userB to userA.
+  * In contrast to y-map, types on `y.share.*` cannot be overwritten or deleted.
+    Instead, they are merged among all users. This feature is only available on
+    `y.share.*`
+  * Weird behavior: It is supported that two users specify different types with
+    the same property name.
+     E.g. userA specifies `options.share.x = 'Array'`, and userB specifies
+     `options.share.x = 'Text'`. But they only share data if they specified the
+     same type with the same property name
+* options.type (browser only)
+  * Array of modules that Yjs needs to require, before instantiating a shared
+    type.
+  * By default Yjs requires the specified database adapter, the specified
+    connector, and all modules that are used in `options.share.*`
+  * Put all types here that you intend to use, but are not used in y.share.*
+
+### Instantiated Y object (y)
+`Y(options)` returns a promise that is fulfilled when..
+
+* All modules are loaded
+  * The specified database adapter is loaded
+  * The specified connector is loaded
+  * All types are included
+* The connector is initialized, and a unique user id is set (received from the
+  server)
+  * Note: When using y-indexeddb, a retrieved user id is stored on `localStorage`
+
+The promise returns an instance of Y. We denote it with a lower case `y`.
+
+* y.share.*
+  * Instances of the types you specified on options.share.*
+  * y.share.* can only be defined once when you instantiate Y!
+* y.connector is an instance of Y.AbstractConnector
+* y.connector.onUserEvent(function (event) {..})
+  * Observe user events (event.action is either 'userLeft' or 'userJoined')
+* y.connector.whenSynced(listener)
+  * `listener` is executed when y synced with at least one user.
+  * `listener` is not called when no other user is in the same room.
+  * y-websockets-client aways waits to sync with the server
+* y.connector.disconnect()
+  * Force to disconnect this instance from the other instances
+* y.connector.reconnect()
+  * Try to reconnect to the other instances (needs to be supported by the
+    connector)
+  * Not supported by y-xmpp
+* y.close()
+  * Destroy this object.
+  * Destroys all types (they will throw weird errors if you still use them)
+  * Disconnects from the other instances (via connector)
+  * Returns a promise
+* y.destroy()
+  * calls y.close()
+  * Removes all data from the database
+  * Returns a promise
+* y.db.stopGarbageCollector()
+  * Stop the garbage collector. Call y.db.garbageCollect() to continue garbage
+    collection
+* y.db.gc :: Boolean
+  * Whether gc is turned on
+* y.db.gcTimeout :: Number (defaults to 50000 ms)
+  * Time interval between two garbage collect cycles
+  * It is required that all instances exchanged all messages after two garbage
+    collect cycles (after 100000 ms per default)
+* y.db.userId :: String
+  * The used user id for this client. **Never overwrite this**
+
+### Logging
+Yjs uses [debug](https://github.com/visionmedia/debug) for logging. The flag
+`y*` enables logging for all y-* components. You can selectively remove
+components you are not interested in: E.g. The flag `y*,-y:connector-message`
+will not log the long `y:connector-message` messages.
+
+##### Enable logging in Node.js
+```sh
+DEBUG=y* node app.js
 ```
-* .val()
-  * Retrieve all properties of this type as a JSON Object
-* .val(name)
-  * Retrieve the value of a property
-* .val(name, value)
-  * Set/update a property. Returns `this` Y.Object
-* .delete(name)
-  * Delete a property
-* .observe(observer)
-  * The `observer` is called whenever something on this object changes. Throws *add*, *update*, and *delete* events
-* .unobserve(f)
-  * Delete an observer
 
-# A note on intention preservation
-When users create/update/delete the same property concurrently, only one change will prevail. Changes on different properties do not conflict with each other.
+Remove the colors in order to log to a file:
+```sh
+DEBUG_COLORS=0 DEBUG=y* node app.js > log
+```
 
-# A note on time complexities
-* .val()
-  * O(|properties|)
-* .val(name)
-  * O(1)
-* .val(name, value)
-  * O(1)
-* .delete(name)
-  * O(1)
-* Apply a delete operation from another user
-  * O(1)
-* Apply an update operation from another user (set/update a property)
-  * Yjs does not transform against operations that do not conflict with each other.
-  * An operation conflicts with another operation if it changes the same property.
-  * Overall worst case complexety: O(|conflicts|!)
-
-# Status
-Yjs is a work in progress. Different versions of the *y-* repositories may not work together. Just drop me a line if you run into troubles.
-
-## Get help
-[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/y-js/yjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-
-Please report _any_ issues to the [Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very soon, if possible.
+##### Enable logging in the browser
+```js
+localStorage.debug = 'y*'
+```
 
 ## Contribution
-I created this framework during my bachelor thesis at the chair of computer science 5 [(i5)](http://dbis.rwth-aachen.de/cms), RWTH University. Since December 2014 I'm working on Yjs as a part of my student worker job at the i5.
+I created this framework during my bachelor thesis at the chair of computer
+science 5 [(i5)](http://dbis.rwth-aachen.de/cms), RWTH University. Since
+December 2014 I'm working on Yjs as a part of my student worker job at the i5.
 
 ## License
-Yjs is licensed under the [MIT License](./LICENSE.txt).
+Yjs is licensed under the [MIT License](./LICENSE).
 
 <yjs@dbis.rwth-aachen.de>
-
-[ShareJs]: https://github.com/share/ShareJS
-[OpenCoweb]: https://github.com/opencoweb/coweb

bower.json

@@ -1,33 +0,0 @@
-{
-  "name": "yjs",
-  "version": "0.5.0",
-  "homepage": "https://github.com/DadaMonad/yjs",
-  "authors": [
-    "Kevin Jahns <kevin.jahns@rwth-aachen.de>"
-  ],
-  "description": "A Framework that enables Real-Time collaboration on arbitrary data structures.",
-  "main": [
-    "./y.js",
-    "./y-object.html",
-    "./build/node/y.js"
-  ],
-  "keywords": [
-    "OT",
-    "collaboration",
-    "synchronization",
-    "ShareJS",
-    "Coweb",
-    "concurrency"
-  ],
-  "license": "MIT",
-  "ignore": [
-    "node_modules",
-    "bower_components",
-    "test",
-    "extras",
-    "test"
-  ],
-  "devDependencies": {
-    "y-test" : "y-test#~0.4.0"
-  }
-}

build/README.md

@@ -1,11 +0,0 @@
-
-# Directories
-
-### build/browser
-You find the browserified (not minified) version of yjs here. This is nice for debugging, since it also includes sourcemaps. For production, however, you should use the version that you find in the main directory.
-
-### build/node
-Yjs for nodejs is located here. You can only use the submodules, or require 'y' in your node project. Also works with browserify.
-
-### build/test
-Start build/test/index.html' in your browser, to perform testing Yjs.

build/browser/y-object.html

@@ -1,7 +0,0 @@
-
-<polymer-element name="y-object" hidden attributes="val connector y">
-</polymer-element>
-<polymer-element name="y-property" hidden attributes="val name y">
-</polymer-element>
-
-<script src="./y-object.js"></script>

build/node/ConnectorAdapter.js

@@ -1,71 +0,0 @@
-var ConnectorClass, adaptConnector;
-
-ConnectorClass = require("./ConnectorClass");
-
-adaptConnector = function(connector, engine, HB, execution_listener) {
-  var applyHB, encode_state_vector, f, getHB, getStateVector, name, parse_state_vector, send_;
-  for (name in ConnectorClass) {
-    f = ConnectorClass[name];
-    connector[name] = f;
-  }
-  connector.setIsBoundToY();
-  send_ = function(o) {
-    if ((o.uid.creator === HB.getUserId()) && (typeof o.uid.op_number !== "string") && (HB.getUserId() !== "_temp")) {
-      return connector.broadcast(o);
-    }
-  };
-  if (connector.invokeSync != null) {
-    HB.setInvokeSyncHandler(connector.invokeSync);
-  }
-  execution_listener.push(send_);
-  encode_state_vector = function(v) {
-    var results, value;
-    results = [];
-    for (name in v) {
-      value = v[name];
-      results.push({
-        user: name,
-        state: value
-      });
-    }
-    return results;
-  };
-  parse_state_vector = function(v) {
-    var i, len, s, state_vector;
-    state_vector = {};
-    for (i = 0, len = v.length; i < len; i++) {
-      s = v[i];
-      state_vector[s.user] = s.state;
-    }
-    return state_vector;
-  };
-  getStateVector = function() {
-    return encode_state_vector(HB.getOperationCounter());
-  };
-  getHB = function(v) {
-    var hb, json, state_vector;
-    state_vector = parse_state_vector(v);
-    hb = HB._encode(state_vector);
-    json = {
-      hb: hb,
-      state_vector: encode_state_vector(HB.getOperationCounter())
-    };
-    return json;
-  };
-  applyHB = function(hb, fromHB) {
-    return engine.applyOp(hb, fromHB);
-  };
-  connector.getStateVector = getStateVector;
-  connector.getHB = getHB;
-  connector.applyHB = applyHB;
-  if (connector.receive_handlers == null) {
-    connector.receive_handlers = [];
-  }
-  return connector.receive_handlers.push(function(sender, op) {
-    if (op.uid.creator !== HB.getUserId()) {
-      return engine.applyOp(op);
-    }
-  });
-};
-
-module.exports = adaptConnector;

build/node/ConnectorClass.js

@@ -1,399 +0,0 @@
-module.exports = {
-  init: function(options) {
-    var req;
-    req = (function(_this) {
-      return function(name, choices) {
-        if (options[name] != null) {
-          if ((choices == null) || choices.some(function(c) {
-            return c === options[name];
-          })) {
-            return _this[name] = options[name];
-          } else {
-            throw new Error("You can set the '" + name + "' option to one of the following choices: " + JSON.encode(choices));
-          }
-        } else {
-          throw new Error("You must specify " + name + ", when initializing the Connector!");
-        }
-      };
-    })(this);
-    req("syncMethod", ["syncAll", "master-slave"]);
-    req("role", ["master", "slave"]);
-    req("user_id");
-    if (typeof this.on_user_id_set === "function") {
-      this.on_user_id_set(this.user_id);
-    }
-    if (options.perform_send_again != null) {
-      this.perform_send_again = options.perform_send_again;
-    } else {
-      this.perform_send_again = true;
-    }
-    if (this.role === "master") {
-      this.syncMethod = "syncAll";
-    }
-    this.is_synced = false;
-    this.connections = {};
-    if (this.receive_handlers == null) {
-      this.receive_handlers = [];
-    }
-    this.connections = {};
-    this.current_sync_target = null;
-    this.sent_hb_to_all_users = false;
-    return this.is_initialized = true;
-  },
-  onUserEvent: function(f) {
-    if (this.connections_listeners == null) {
-      this.connections_listeners = [];
-    }
-    return this.connections_listeners.push(f);
-  },
-  isRoleMaster: function() {
-    return this.role === "master";
-  },
-  isRoleSlave: function() {
-    return this.role === "slave";
-  },
-  findNewSyncTarget: function() {
-    var c, ref, user;
-    this.current_sync_target = null;
-    if (this.syncMethod === "syncAll") {
-      ref = this.connections;
-      for (user in ref) {
-        c = ref[user];
-        if (!c.is_synced) {
-          this.performSync(user);
-          break;
-        }
-      }
-    }
-    if (this.current_sync_target == null) {
-      this.setStateSynced();
-    }
-    return null;
-  },
-  userLeft: function(user) {
-    var f, i, len, ref, results;
-    delete this.connections[user];
-    this.findNewSyncTarget();
-    if (this.connections_listeners != null) {
-      ref = this.connections_listeners;
-      results = [];
-      for (i = 0, len = ref.length; i < len; i++) {
-        f = ref[i];
-        results.push(f({
-          action: "userLeft",
-          user: user
-        }));
-      }
-      return results;
-    }
-  },
-  userJoined: function(user, role) {
-    var base, f, i, len, ref, results;
-    if (role == null) {
-      throw new Error("Internal: You must specify the role of the joined user! E.g. userJoined('uid:3939','slave')");
-    }
-    if ((base = this.connections)[user] == null) {
-      base[user] = {};
-    }
-    this.connections[user].is_synced = false;
-    if ((!this.is_synced) || this.syncMethod === "syncAll") {
-      if (this.syncMethod === "syncAll") {
-        this.performSync(user);
-      } else if (role === "master") {
-        this.performSyncWithMaster(user);
-      }
-    }
-    if (this.connections_listeners != null) {
-      ref = this.connections_listeners;
-      results = [];
-      for (i = 0, len = ref.length; i < len; i++) {
-        f = ref[i];
-        results.push(f({
-          action: "userJoined",
-          user: user,
-          role: role
-        }));
-      }
-      return results;
-    }
-  },
-  whenSynced: function(args) {
-    if (args.constructore === Function) {
-      args = [args];
-    }
-    if (this.is_synced) {
-      return args[0].apply(this, args.slice(1));
-    } else {
-      if (this.compute_when_synced == null) {
-        this.compute_when_synced = [];
-      }
-      return this.compute_when_synced.push(args);
-    }
-  },
-  onReceive: function(f) {
-    return this.receive_handlers.push(f);
-  },
-
-  /*
-   * Broadcast a message to all connected peers.
-   * @param message {Object} The message to broadcast.
-  #
-  broadcast: (message)->
-    throw new Error "You must implement broadcast!"
-  
-  #
-   * Send a message to a peer, or set of peers
-  #
-  send: (peer_s, message)->
-    throw new Error "You must implement send!"
-   */
-  performSync: function(user) {
-    var _hb, hb, i, len, o;
-    if (this.current_sync_target == null) {
-      this.current_sync_target = user;
-      this.send(user, {
-        sync_step: "getHB",
-        send_again: "true",
-        data: []
-      });
-      if (!this.sent_hb_to_all_users) {
-        this.sent_hb_to_all_users = true;
-        hb = this.getHB([]).hb;
-        _hb = [];
-        for (i = 0, len = hb.length; i < len; i++) {
-          o = hb[i];
-          _hb.push(o);
-          if (_hb.length > 10) {
-            this.broadcast({
-              sync_step: "applyHB_",
-              data: _hb
-            });
-            _hb = [];
-          }
-        }
-        return this.broadcast({
-          sync_step: "applyHB",
-          data: _hb
-        });
-      }
-    }
-  },
-  performSyncWithMaster: function(user) {
-    var _hb, hb, i, len, o;
-    this.current_sync_target = user;
-    this.send(user, {
-      sync_step: "getHB",
-      send_again: "true",
-      data: []
-    });
-    hb = this.getHB([]).hb;
-    _hb = [];
-    for (i = 0, len = hb.length; i < len; i++) {
-      o = hb[i];
-      _hb.push(o);
-      if (_hb.length > 10) {
-        this.broadcast({
-          sync_step: "applyHB_",
-          data: _hb
-        });
-        _hb = [];
-      }
-    }
-    return this.broadcast({
-      sync_step: "applyHB",
-      data: _hb
-    });
-  },
-  setStateSynced: function() {
-    var f, i, len, ref;
-    if (!this.is_synced) {
-      this.is_synced = true;
-      if (this.compute_when_synced != null) {
-        ref = this.compute_when_synced;
-        for (i = 0, len = ref.length; i < len; i++) {
-          f = ref[i];
-          f();
-        }
-        delete this.compute_when_synced;
-      }
-      return null;
-    }
-  },
-  receiveMessage: function(sender, res) {
-    var _hb, data, f, hb, i, j, len, len1, o, ref, results, sendApplyHB, send_again;
-    if (res.sync_step == null) {
-      ref = this.receive_handlers;
-      results = [];
-      for (i = 0, len = ref.length; i < len; i++) {
-        f = ref[i];
-        results.push(f(sender, res));
-      }
-      return results;
-    } else {
-      if (sender === this.user_id) {
-        return;
-      }
-      if (res.sync_step === "getHB") {
-        data = this.getHB(res.data);
-        hb = data.hb;
-        _hb = [];
-        if (this.is_synced) {
-          sendApplyHB = (function(_this) {
-            return function(m) {
-              return _this.send(sender, m);
-            };
-          })(this);
-        } else {
-          sendApplyHB = (function(_this) {
-            return function(m) {
-              return _this.broadcast(m);
-            };
-          })(this);
-        }
-        for (j = 0, len1 = hb.length; j < len1; j++) {
-          o = hb[j];
-          _hb.push(o);
-          if (_hb.length > 10) {
-            sendApplyHB({
-              sync_step: "applyHB_",
-              data: _hb
-            });
-            _hb = [];
-          }
-        }
-        sendApplyHB({
-          sync_step: "applyHB",
-          data: _hb
-        });
-        if ((res.send_again != null) && this.perform_send_again) {
-          send_again = (function(_this) {
-            return function(sv) {
-              return function() {
-                var k, len2;
-                hb = _this.getHB(sv).hb;
-                for (k = 0, len2 = hb.length; k < len2; k++) {
-                  o = hb[k];
-                  _hb.push(o);
-                  if (_hb.length > 10) {
-                    _this.send(sender, {
-                      sync_step: "applyHB_",
-                      data: _hb
-                    });
-                    _hb = [];
-                  }
-                }
-                return _this.send(sender, {
-                  sync_step: "applyHB",
-                  data: _hb,
-                  sent_again: "true"
-                });
-              };
-            };
-          })(this)(data.state_vector);
-          return setTimeout(send_again, 3000);
-        }
-      } else if (res.sync_step === "applyHB") {
-        this.applyHB(res.data, sender === this.current_sync_target);
-        if ((this.syncMethod === "syncAll" || (res.sent_again != null)) && (!this.is_synced) && ((this.current_sync_target === sender) || (this.current_sync_target == null))) {
-          this.connections[sender].is_synced = true;
-          return this.findNewSyncTarget();
-        }
-      } else if (res.sync_step === "applyHB_") {
-        return this.applyHB(res.data, sender === this.current_sync_target);
-      }
-    }
-  },
-  parseMessageFromXml: function(m) {
-    var parse_array, parse_object;
-    parse_array = function(node) {
-      var i, len, n, ref, results;
-      ref = node.children;
-      results = [];
-      for (i = 0, len = ref.length; i < len; i++) {
-        n = ref[i];
-        if (n.getAttribute("isArray") === "true") {
-          results.push(parse_array(n));
-        } else {
-          results.push(parse_object(n));
-        }
-      }
-      return results;
-    };
-    parse_object = function(node) {
-      var i, int, json, len, n, name, ref, ref1, value;
-      json = {};
-      ref = node.attrs;
-      for (name in ref) {
-        value = ref[name];
-        int = parseInt(value);
-        if (isNaN(int) || ("" + int) !== value) {
-          json[name] = value;
-        } else {
-          json[name] = int;
-        }
-      }
-      ref1 = node.children;
-      for (i = 0, len = ref1.length; i < len; i++) {
-        n = ref1[i];
-        name = n.name;
-        if (n.getAttribute("isArray") === "true") {
-          json[name] = parse_array(n);
-        } else {
-          json[name] = parse_object(n);
-        }
-      }
-      return json;
-    };
-    return parse_object(m);
-  },
-  encodeMessageToXml: function(m, json) {
-    var encode_array, encode_object;
-    encode_object = function(m, json) {
-      var name, value;
-      for (name in json) {
-        value = json[name];
-        if (value == null) {
-
-        } else if (value.constructor === Object) {
-          encode_object(m.c(name), value);
-        } else if (value.constructor === Array) {
-          encode_array(m.c(name), value);
-        } else {
-          m.setAttribute(name, value);
-        }
-      }
-      return m;
-    };
-    encode_array = function(m, array) {
-      var e, i, len;
-      m.setAttribute("isArray", "true");
-      for (i = 0, len = array.length; i < len; i++) {
-        e = array[i];
-        if (e.constructor === Object) {
-          encode_object(m.c("array-element"), e);
-        } else {
-          encode_array(m.c("array-element"), e);
-        }
-      }
-      return m;
-    };
-    if (json.constructor === Object) {
-      return encode_object(m.c("y", {
-        xmlns: "http://y.ninja/connector-stanza"
-      }), json);
-    } else if (json.constructor === Array) {
-      return encode_array(m.c("y", {
-        xmlns: "http://y.ninja/connector-stanza"
-      }), json);
-    } else {
-      throw new Error("I can't encode this json!");
-    }
-  },
-  setIsBoundToY: function() {
-    if (typeof this.on_bound_to_y === "function") {
-      this.on_bound_to_y();
-    }
-    delete this.when_bound_to_y;
-    return this.is_bound_to_y = true;
-  }
-};

build/node/Engine.js

@@ -1,120 +0,0 @@
-var Engine;
-
-if (typeof window !== "undefined" && window !== null) {
-  window.unprocessed_counter = 0;
-}
-
-if (typeof window !== "undefined" && window !== null) {
-  window.unprocessed_exec_counter = 0;
-}
-
-if (typeof window !== "undefined" && window !== null) {
-  window.unprocessed_types = [];
-}
-
-Engine = (function() {
-  function Engine(HB, types) {
-    this.HB = HB;
-    this.types = types;
-    this.unprocessed_ops = [];
-  }
-
-  Engine.prototype.parseOperation = function(json) {
-    var type;
-    type = this.types[json.type];
-    if ((type != null ? type.parse : void 0) != null) {
-      return type.parse(json);
-    } else {
-      throw new Error("You forgot to specify a parser for type " + json.type + ". The message is " + (JSON.stringify(json)) + ".");
-    }
-  };
-
-
-  /*
-  applyOpsBundle: (ops_json)->
-    ops = []
-    for o in ops_json
-      ops.push @parseOperation o
-    for o in ops
-      if not o.execute()
-        @unprocessed_ops.push o
-    @tryUnprocessed()
-   */
-
-  Engine.prototype.applyOpsCheckDouble = function(ops_json) {
-    var i, len, o, results;
-    results = [];
-    for (i = 0, len = ops_json.length; i < len; i++) {
-      o = ops_json[i];
-      if (this.HB.getOperation(o.uid) == null) {
-        results.push(this.applyOp(o));
-      } else {
-        results.push(void 0);
-      }
-    }
-    return results;
-  };
-
-  Engine.prototype.applyOps = function(ops_json) {
-    return this.applyOp(ops_json);
-  };
-
-  Engine.prototype.applyOp = function(op_json_array, fromHB) {
-    var i, len, o, op_json;
-    if (fromHB == null) {
-      fromHB = false;
-    }
-    if (op_json_array.constructor !== Array) {
-      op_json_array = [op_json_array];
-    }
-    for (i = 0, len = op_json_array.length; i < len; i++) {
-      op_json = op_json_array[i];
-      if (fromHB) {
-        op_json.fromHB = "true";
-      }
-      o = this.parseOperation(op_json);
-      o.parsed_from_json = op_json;
-      if (op_json.fromHB != null) {
-        o.fromHB = op_json.fromHB;
-      }
-      if (this.HB.getOperation(o) != null) {
-
-      } else if (((!this.HB.isExpectedOperation(o)) && (o.fromHB == null)) || (!o.execute())) {
-        this.unprocessed_ops.push(o);
-        if (typeof window !== "undefined" && window !== null) {
-          window.unprocessed_types.push(o.type);
-        }
-      }
-    }
-    return this.tryUnprocessed();
-  };
-
-  Engine.prototype.tryUnprocessed = function() {
-    var i, len, old_length, op, ref, unprocessed;
-    while (true) {
-      old_length = this.unprocessed_ops.length;
-      unprocessed = [];
-      ref = this.unprocessed_ops;
-      for (i = 0, len = ref.length; i < len; i++) {
-        op = ref[i];
-        if (this.HB.getOperation(op) != null) {
-
-        } else if ((!this.HB.isExpectedOperation(op) && (op.fromHB == null)) || (!op.execute())) {
-          unprocessed.push(op);
-        }
-      }
-      this.unprocessed_ops = unprocessed;
-      if (this.unprocessed_ops.length === old_length) {
-        break;
-      }
-    }
-    if (this.unprocessed_ops.length !== 0) {
-      return this.HB.invokeSync();
-    }
-  };
-
-  return Engine;
-
-})();
-
-module.exports = Engine;

build/node/HistoryBuffer.js

@@ -1,261 +0,0 @@
-var HistoryBuffer,
-  bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
-
-HistoryBuffer = (function() {
-  function HistoryBuffer(user_id1) {
-    this.user_id = user_id1;
-    this.emptyGarbage = bind(this.emptyGarbage, this);
-    this.operation_counter = {};
-    this.buffer = {};
-    this.change_listeners = [];
-    this.garbage = [];
-    this.trash = [];
-    this.performGarbageCollection = true;
-    this.garbageCollectTimeout = 30000;
-    this.reserved_identifier_counter = 0;
-    setTimeout(this.emptyGarbage, this.garbageCollectTimeout);
-  }
-
-  HistoryBuffer.prototype.resetUserId = function(id) {
-    var o, o_name, own;
-    own = this.buffer[this.user_id];
-    if (own != null) {
-      for (o_name in own) {
-        o = own[o_name];
-        if (o.uid.creator != null) {
-          o.uid.creator = id;
-        }
-        if (o.uid.alt != null) {
-          o.uid.alt.creator = id;
-        }
-      }
-      if (this.buffer[id] != null) {
-        throw new Error("You are re-assigning an old user id - this is not (yet) possible!");
-      }
-      this.buffer[id] = own;
-      delete this.buffer[this.user_id];
-    }
-    if (this.operation_counter[this.user_id] != null) {
-      this.operation_counter[id] = this.operation_counter[this.user_id];
-      delete this.operation_counter[this.user_id];
-    }
-    return this.user_id = id;
-  };
-
-  HistoryBuffer.prototype.emptyGarbage = function() {
-    var i, len, o, ref;
-    ref = this.garbage;
-    for (i = 0, len = ref.length; i < len; i++) {
-      o = ref[i];
-      if (typeof o.cleanup === "function") {
-        o.cleanup();
-      }
-    }
-    this.garbage = this.trash;
-    this.trash = [];
-    if (this.garbageCollectTimeout !== -1) {
-      this.garbageCollectTimeoutId = setTimeout(this.emptyGarbage, this.garbageCollectTimeout);
-    }
-    return void 0;
-  };
-
-  HistoryBuffer.prototype.getUserId = function() {
-    return this.user_id;
-  };
-
-  HistoryBuffer.prototype.addToGarbageCollector = function() {
-    var i, len, o, results;
-    if (this.performGarbageCollection) {
-      results = [];
-      for (i = 0, len = arguments.length; i < len; i++) {
-        o = arguments[i];
-        if (o != null) {
-          results.push(this.garbage.push(o));
-        } else {
-          results.push(void 0);
-        }
-      }
-      return results;
-    }
-  };
-
-  HistoryBuffer.prototype.stopGarbageCollection = function() {
-    this.performGarbageCollection = false;
-    this.setManualGarbageCollect();
-    this.garbage = [];
-    return this.trash = [];
-  };
-
-  HistoryBuffer.prototype.setManualGarbageCollect = function() {
-    this.garbageCollectTimeout = -1;
-    clearTimeout(this.garbageCollectTimeoutId);
-    return this.garbageCollectTimeoutId = void 0;
-  };
-
-  HistoryBuffer.prototype.setGarbageCollectTimeout = function(garbageCollectTimeout) {
-    this.garbageCollectTimeout = garbageCollectTimeout;
-  };
-
-  HistoryBuffer.prototype.getReservedUniqueIdentifier = function() {
-    return {
-      creator: '_',
-      op_number: "_" + (this.reserved_identifier_counter++)
-    };
-  };
-
-  HistoryBuffer.prototype.getOperationCounter = function(user_id) {
-    var ctn, ref, res, user;
-    if (user_id == null) {
-      res = {};
-      ref = this.operation_counter;
-      for (user in ref) {
-        ctn = ref[user];
-        res[user] = ctn;
-      }
-      return res;
-    } else {
-      return this.operation_counter[user_id];
-    }
-  };
-
-  HistoryBuffer.prototype.isExpectedOperation = function(o) {
-    var base, name;
-    if ((base = this.operation_counter)[name = o.uid.creator] == null) {
-      base[name] = 0;
-    }
-    o.uid.op_number <= this.operation_counter[o.uid.creator];
-    return true;
-  };
-
-  HistoryBuffer.prototype._encode = function(state_vector) {
-    var json, o, o_json, o_next, o_number, o_prev, ref, u_name, unknown, user;
-    if (state_vector == null) {
-      state_vector = {};
-    }
-    json = [];
-    unknown = function(user, o_number) {
-      if ((user == null) || (o_number == null)) {
-        throw new Error("dah!");
-      }
-      return (state_vector[user] == null) || state_vector[user] <= o_number;
-    };
-    ref = this.buffer;
-    for (u_name in ref) {
-      user = ref[u_name];
-      if (u_name === "_") {
-        continue;
-      }
-      for (o_number in user) {
-        o = user[o_number];
-        if ((o.uid.noOperation == null) && unknown(u_name, o_number)) {
-          o_json = o._encode();
-          if (o.next_cl != null) {
-            o_next = o.next_cl;
-            while ((o_next.next_cl != null) && unknown(o_next.uid.creator, o_next.uid.op_number)) {
-              o_next = o_next.next_cl;
-            }
-            o_json.next = o_next.getUid();
-          } else if (o.prev_cl != null) {
-            o_prev = o.prev_cl;
-            while ((o_prev.prev_cl != null) && unknown(o_prev.uid.creator, o_prev.uid.op_number)) {
-              o_prev = o_prev.prev_cl;
-            }
-            o_json.prev = o_prev.getUid();
-          }
-          json.push(o_json);
-        }
-      }
-    }
-    return json;
-  };
-
-  HistoryBuffer.prototype.getNextOperationIdentifier = function(user_id) {
-    var uid;
-    if (user_id == null) {
-      user_id = this.user_id;
-    }
-    if (this.operation_counter[user_id] == null) {
-      this.operation_counter[user_id] = 0;
-    }
-    uid = {
-      'creator': user_id,
-      'op_number': this.operation_counter[user_id]
-    };
-    this.operation_counter[user_id]++;
-    return uid;
-  };
-
-  HistoryBuffer.prototype.getOperation = function(uid) {
-    var o, ref;
-    if (uid.uid != null) {
-      uid = uid.uid;
-    }
-    o = (ref = this.buffer[uid.creator]) != null ? ref[uid.op_number] : void 0;
-    if ((uid.sub != null) && (o != null)) {
-      return o.retrieveSub(uid.sub);
-    } else {
-      return o;
-    }
-  };
-
-  HistoryBuffer.prototype.addOperation = function(o) {
-    if (this.buffer[o.uid.creator] == null) {
-      this.buffer[o.uid.creator] = {};
-    }
-    if (this.buffer[o.uid.creator][o.uid.op_number] != null) {
-      throw new Error("You must not overwrite operations!");
-    }
-    if ((o.uid.op_number.constructor !== String) && (!this.isExpectedOperation(o)) && (o.fromHB == null)) {
-      throw new Error("this operation was not expected!");
-    }
-    this.addToCounter(o);
-    this.buffer[o.uid.creator][o.uid.op_number] = o;
-    return o;
-  };
-
-  HistoryBuffer.prototype.removeOperation = function(o) {
-    var ref;
-    return (ref = this.buffer[o.uid.creator]) != null ? delete ref[o.uid.op_number] : void 0;
-  };
-
-  HistoryBuffer.prototype.setInvokeSyncHandler = function(f) {
-    return this.invokeSync = f;
-  };
-
-  HistoryBuffer.prototype.invokeSync = function() {};
-
-  HistoryBuffer.prototype.renewStateVector = function(state_vector) {
-    var results, state, user;
-    results = [];
-    for (user in state_vector) {
-      state = state_vector[user];
-      if (((this.operation_counter[user] == null) || (this.operation_counter[user] < state_vector[user])) && (state_vector[user] != null)) {
-        results.push(this.operation_counter[user] = state_vector[user]);
-      } else {
-        results.push(void 0);
-      }
-    }
-    return results;
-  };
-
-  HistoryBuffer.prototype.addToCounter = function(o) {
-    var base, name;
-    if ((base = this.operation_counter)[name = o.uid.creator] == null) {
-      base[name] = 0;
-    }
-    if (o.uid.creator !== this.getUserId()) {
-      if (o.uid.op_number === this.operation_counter[o.uid.creator]) {
-        this.operation_counter[o.uid.creator]++;
-      }
-      while (this.buffer[o.uid.creator][this.operation_counter[o.uid.creator]] != null) {
-        this.operation_counter[o.uid.creator]++;
-      }
-      return void 0;
-    }
-  };
-
-  return HistoryBuffer;
-
-})();
-
-module.exports = HistoryBuffer;

build/node/ObjectType.js

@@ -1,91 +0,0 @@
-var YObject;
-
-YObject = (function() {
-  function YObject(_object) {
-    var name, ref, val;
-    this._object = _object != null ? _object : {};
-    if (this._object.constructor === Object) {
-      ref = this._object;
-      for (name in ref) {
-        val = ref[name];
-        if (val.constructor === Object) {
-          this._object[name] = new YObject(val);
-        }
-      }
-    } else {
-      throw new Error("Y.Object accepts Json Objects only");
-    }
-  }
-
-  YObject.prototype._name = "Object";
-
-  YObject.prototype._getModel = function(types, ops) {
-    var n, o, ref;
-    if (this._model == null) {
-      this._model = new ops.MapManager(this).execute();
-      ref = this._object;
-      for (n in ref) {
-        o = ref[n];
-        this._model.val(n, o);
-      }
-    }
-    delete this._object;
-    return this._model;
-  };
-
-  YObject.prototype._setModel = function(_model) {
-    this._model = _model;
-    return delete this._object;
-  };
-
-  YObject.prototype.observe = function(f) {
-    this._model.observe(f);
-    return this;
-  };
-
-  YObject.prototype.unobserve = function(f) {
-    this._model.unobserve(f);
-    return this;
-  };
-
-  YObject.prototype.val = function(name, content) {
-    var n, ref, res, v;
-    if (this._model != null) {
-      return this._model.val.apply(this._model, arguments);
-    } else {
-      if (content != null) {
-        return this._object[name] = content;
-      } else if (name != null) {
-        return this._object[name];
-      } else {
-        res = {};
-        ref = this._object;
-        for (n in ref) {
-          v = ref[n];
-          res[n] = v;
-        }
-        return res;
-      }
-    }
-  };
-
-  YObject.prototype["delete"] = function(name) {
-    this._model["delete"](name);
-    return this;
-  };
-
-  return YObject;
-
-})();
-
-if (typeof window !== "undefined" && window !== null) {
-  if (window.Y != null) {
-    window.Y.Object = YObject;
-  } else {
-    throw new Error("You must first import Y!");
-  }
-}
-
-if (typeof module !== "undefined" && module !== null) {
-  module.exports = YObject;
-}

build/node/Operations/Basic.js

@@ -1,670 +0,0 @@
-var slice = [].slice,
-  extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
-  hasProp = {}.hasOwnProperty;
-
-module.exports = function() {
-  var execution_listener, ops;
-  ops = {};
-  execution_listener = [];
-  ops.Operation = (function() {
-    function Operation(custom_type, uid, content, content_operations) {
-      var name, op;
-      if (custom_type != null) {
-        this.custom_type = custom_type;
-      }
-      this.is_deleted = false;
-      this.garbage_collected = false;
-      this.event_listeners = [];
-      if (uid != null) {
-        this.uid = uid;
-      }
-      if (content === void 0) {
-
-      } else if ((content != null) && (content.creator != null)) {
-        this.saveOperation('content', content);
-      } else {
-        this.content = content;
-      }
-      if (content_operations != null) {
-        this.content_operations = {};
-        for (name in content_operations) {
-          op = content_operations[name];
-          this.saveOperation(name, op, 'content_operations');
-        }
-      }
-    }
-
-    Operation.prototype.type = "Operation";
-
-    Operation.prototype.getContent = function(name) {
-      var content, n, ref, ref1, v;
-      if (this.content != null) {
-        if (this.content.getCustomType != null) {
-          return this.content.getCustomType();
-        } else if (this.content.constructor === Object) {
-          if (name != null) {
-            if (this.content[name] != null) {
-              return this.content[name];
-            } else {
-              return this.content_operations[name].getCustomType();
-            }
-          } else {
-            content = {};
-            ref = this.content;
-            for (n in ref) {
-              v = ref[n];
-              content[n] = v;
-            }
-            if (this.content_operations != null) {
-              ref1 = this.content_operations;
-              for (n in ref1) {
-                v = ref1[n];
-                v = v.getCustomType();
-                content[n] = v;
-              }
-            }
-            return content;
-          }
-        } else {
-          return this.content;
-        }
-      } else {
-        return this.content;
-      }
-    };
-
-    Operation.prototype.retrieveSub = function() {
-      throw new Error("sub properties are not enable on this operation type!");
-    };
-
-    Operation.prototype.observe = function(f) {
-      return this.event_listeners.push(f);
-    };
-
-    Operation.prototype.unobserve = function(f) {
-      return this.event_listeners = this.event_listeners.filter(function(g) {
-        return f !== g;
-      });
-    };
-
-    Operation.prototype.deleteAllObservers = function() {
-      return this.event_listeners = [];
-    };
-
-    Operation.prototype["delete"] = function() {
-      (new ops.Delete(void 0, this)).execute();
-      return null;
-    };
-
-    Operation.prototype.callEvent = function() {
-      var callon;
-      if (this.custom_type != null) {
-        callon = this.getCustomType();
-      } else {
-        callon = this;
-      }
-      return this.forwardEvent.apply(this, [callon].concat(slice.call(arguments)));
-    };
-
-    Operation.prototype.forwardEvent = function() {
-      var args, f, j, len, op, ref, results;
-      op = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
-      ref = this.event_listeners;
-      results = [];
-      for (j = 0, len = ref.length; j < len; j++) {
-        f = ref[j];
-        results.push(f.call.apply(f, [op].concat(slice.call(args))));
-      }
-      return results;
-    };
-
-    Operation.prototype.isDeleted = function() {
-      return this.is_deleted;
-    };
-
-    Operation.prototype.applyDelete = function(garbagecollect) {
-      if (garbagecollect == null) {
-        garbagecollect = true;
-      }
-      if (!this.garbage_collected) {
-        this.is_deleted = true;
-        if (garbagecollect) {
-          this.garbage_collected = true;
-          return this.HB.addToGarbageCollector(this);
-        }
-      }
-    };
-
-    Operation.prototype.cleanup = function() {
-      this.HB.removeOperation(this);
-      return this.deleteAllObservers();
-    };
-
-    Operation.prototype.setParent = function(parent1) {
-      this.parent = parent1;
-    };
-
-    Operation.prototype.getParent = function() {
-      return this.parent;
-    };
-
-    Operation.prototype.getUid = function() {
-      var map_uid;
-      if (this.uid.noOperation == null) {
-        return this.uid;
-      } else {
-        if (this.uid.alt != null) {
-          map_uid = this.uid.alt.cloneUid();
-          map_uid.sub = this.uid.sub;
-          return map_uid;
-        } else {
-          return void 0;
-        }
-      }
-    };
-
-    Operation.prototype.cloneUid = function() {
-      var n, ref, uid, v;
-      uid = {};
-      ref = this.getUid();
-      for (n in ref) {
-        v = ref[n];
-        uid[n] = v;
-      }
-      return uid;
-    };
-
-    Operation.prototype.execute = function() {
-      var j, l, len;
-      if (this.validateSavedOperations()) {
-        this.is_executed = true;
-        if (this.uid == null) {
-          this.uid = this.HB.getNextOperationIdentifier();
-        }
-        if (this.uid.noOperation == null) {
-          this.HB.addOperation(this);
-          for (j = 0, len = execution_listener.length; j < len; j++) {
-            l = execution_listener[j];
-            l(this._encode());
-          }
-        }
-        return this;
-      } else {
-        return false;
-      }
-    };
-
-    Operation.prototype.saveOperation = function(name, op, base) {
-      var base1, dest, j, last_path, len, path, paths;
-      if (base == null) {
-        base = "this";
-      }
-      if ((op != null) && (op._getModel != null)) {
-        op = op._getModel(this.custom_types, this.operations);
-      }
-      if (op == null) {
-
-      } else if ((op.execute != null) || !((op.op_number != null) && (op.creator != null))) {
-        if (base === "this") {
-          return this[name] = op;
-        } else {
-          dest = this[base];
-          paths = name.split("/");
-          last_path = paths.pop();
-          for (j = 0, len = paths.length; j < len; j++) {
-            path = paths[j];
-            dest = dest[path];
-          }
-          return dest[last_path] = op;
-        }
-      } else {
-        if (this.unchecked == null) {
-          this.unchecked = {};
-        }
-        if ((base1 = this.unchecked)[base] == null) {
-          base1[base] = {};
-        }
-        return this.unchecked[base][name] = op;
-      }
-    };
-
-    Operation.prototype.validateSavedOperations = function() {
-      var base, base_name, dest, j, last_path, len, name, op, op_uid, path, paths, ref, success, uninstantiated;
-      uninstantiated = {};
-      success = true;
-      ref = this.unchecked;
-      for (base_name in ref) {
-        base = ref[base_name];
-        for (name in base) {
-          op_uid = base[name];
-          op = this.HB.getOperation(op_uid);
-          if (op) {
-            if (base_name === "this") {
-              this[name] = op;
-            } else {
-              dest = this[base_name];
-              paths = name.split("/");
-              last_path = paths.pop();
-              for (j = 0, len = paths.length; j < len; j++) {
-                path = paths[j];
-                dest = dest[path];
-              }
-              dest[last_path] = op;
-            }
-          } else {
-            if (uninstantiated[base_name] == null) {
-              uninstantiated[base_name] = {};
-            }
-            uninstantiated[base_name][name] = op_uid;
-            success = false;
-          }
-        }
-      }
-      if (!success) {
-        this.unchecked = uninstantiated;
-        return false;
-      } else {
-        delete this.unchecked;
-        return this;
-      }
-    };
-
-    Operation.prototype.getCustomType = function() {
-      var Type, j, len, ref, t;
-      if (this.custom_type == null) {
-        return this;
-      } else {
-        if (this.custom_type.constructor === String) {
-          Type = this.custom_types;
-          ref = this.custom_type.split(".");
-          for (j = 0, len = ref.length; j < len; j++) {
-            t = ref[j];
-            Type = Type[t];
-          }
-          this.custom_type = new Type();
-          this.custom_type._setModel(this);
-        }
-        return this.custom_type;
-      }
-    };
-
-    Operation.prototype._encode = function(json) {
-      var n, o, operations, ref, ref1;
-      if (json == null) {
-        json = {};
-      }
-      json.type = this.type;
-      json.uid = this.getUid();
-      if (this.custom_type != null) {
-        if (this.custom_type.constructor === String) {
-          json.custom_type = this.custom_type;
-        } else {
-          json.custom_type = this.custom_type._name;
-        }
-      }
-      if (((ref = this.content) != null ? ref.getUid : void 0) != null) {
-        json.content = this.content.getUid();
-      } else {
-        json.content = this.content;
-      }
-      if (this.content_operations != null) {
-        operations = {};
-        ref1 = this.content_operations;
-        for (n in ref1) {
-          o = ref1[n];
-          if (o._getModel != null) {
-            o = o._getModel(this.custom_types, this.operations);
-          }
-          operations[n] = o.getUid();
-        }
-        json.content_operations = operations;
-      }
-      return json;
-    };
-
-    return Operation;
-
-  })();
-  ops.Delete = (function(superClass) {
-    extend(Delete, superClass);
-
-    function Delete(custom_type, uid, deletes) {
-      this.saveOperation('deletes', deletes);
-      Delete.__super__.constructor.call(this, custom_type, uid);
-    }
-
-    Delete.prototype.type = "Delete";
-
-    Delete.prototype._encode = function() {
-      return {
-        'type': "Delete",
-        'uid': this.getUid(),
-        'deletes': this.deletes.getUid()
-      };
-    };
-
-    Delete.prototype.execute = function() {
-      var res;
-      if (this.validateSavedOperations()) {
-        res = Delete.__super__.execute.apply(this, arguments);
-        if (res) {
-          this.deletes.applyDelete(this);
-        }
-        return res;
-      } else {
-        return false;
-      }
-    };
-
-    return Delete;
-
-  })(ops.Operation);
-  ops.Delete.parse = function(o) {
-    var deletes_uid, uid;
-    uid = o['uid'], deletes_uid = o['deletes'];
-    return new this(null, uid, deletes_uid);
-  };
-  ops.Insert = (function(superClass) {
-    extend(Insert, superClass);
-
-    function Insert(custom_type, content, content_operations, parent, uid, prev_cl, next_cl, origin) {
-      this.saveOperation('parent', parent);
-      this.saveOperation('prev_cl', prev_cl);
-      this.saveOperation('next_cl', next_cl);
-      if (origin != null) {
-        this.saveOperation('origin', origin);
-      } else {
-        this.saveOperation('origin', prev_cl);
-      }
-      Insert.__super__.constructor.call(this, custom_type, uid, content, content_operations);
-    }
-
-    Insert.prototype.type = "Insert";
-
-    Insert.prototype.val = function() {
-      return this.getContent();
-    };
-
-    Insert.prototype.getNext = function(i) {
-      var n;
-      if (i == null) {
-        i = 1;
-      }
-      n = this;
-      while (i > 0 && (n.next_cl != null)) {
-        n = n.next_cl;
-        if (!n.is_deleted) {
-          i--;
-        }
-      }
-      if (n.is_deleted) {
-        null;
-      }
-      return n;
-    };
-
-    Insert.prototype.getPrev = function(i) {
-      var n;
-      if (i == null) {
-        i = 1;
-      }
-      n = this;
-      while (i > 0 && (n.prev_cl != null)) {
-        n = n.prev_cl;
-        if (!n.is_deleted) {
-          i--;
-        }
-      }
-      if (n.is_deleted) {
-        return null;
-      } else {
-        return n;
-      }
-    };
-
-    Insert.prototype.applyDelete = function(o) {
-      var callLater, garbagecollect;
-      if (this.deleted_by == null) {
-        this.deleted_by = [];
-      }
-      callLater = false;
-      if ((this.parent != null) && !this.is_deleted && (o != null)) {
-        callLater = true;
-      }
-      if (o != null) {
-        this.deleted_by.push(o);
-      }
-      garbagecollect = false;
-      if (this.next_cl.isDeleted()) {
-        garbagecollect = true;
-      }
-      Insert.__super__.applyDelete.call(this, garbagecollect);
-      if (callLater) {
-        this.parent.callOperationSpecificDeleteEvents(this, o);
-      }
-      if ((this.prev_cl != null) && this.prev_cl.isDeleted()) {
-        return this.prev_cl.applyDelete();
-      }
-    };
-
-    Insert.prototype.cleanup = function() {
-      var d, j, len, o, ref;
-      if (this.next_cl.isDeleted()) {
-        ref = this.deleted_by;
-        for (j = 0, len = ref.length; j < len; j++) {
-          d = ref[j];
-          d.cleanup();
-        }
-        o = this.next_cl;
-        while (o.type !== "Delimiter") {
-          if (o.origin === this) {
-            o.origin = this.prev_cl;
-          }
-          o = o.next_cl;
-        }
-        this.prev_cl.next_cl = this.next_cl;
-        this.next_cl.prev_cl = this.prev_cl;
-        if (this.content instanceof ops.Operation && !(this.content instanceof ops.Insert)) {
-          this.content.referenced_by--;
-          if (this.content.referenced_by <= 0 && !this.content.is_deleted) {
-            this.content.applyDelete();
-          }
-        }
-        delete this.content;
-        return Insert.__super__.cleanup.apply(this, arguments);
-      }
-    };
-
-    Insert.prototype.getDistanceToOrigin = function() {
-      var d, o;
-      d = 0;
-      o = this.prev_cl;
-      while (true) {
-        if (this.origin === o) {
-          break;
-        }
-        d++;
-        o = o.prev_cl;
-      }
-      return d;
-    };
-
-    Insert.prototype.execute = function() {
-      var base1, distance_to_origin, i, o;
-      if (!this.validateSavedOperations()) {
-        return false;
-      } else {
-        if (this.content instanceof ops.Operation) {
-          this.content.insert_parent = this;
-          if ((base1 = this.content).referenced_by == null) {
-            base1.referenced_by = 0;
-          }
-          this.content.referenced_by++;
-        }
-        if (this.parent != null) {
-          if (this.prev_cl == null) {
-            this.prev_cl = this.parent.beginning;
-          }
-          if (this.origin == null) {
-            this.origin = this.prev_cl;
-          } else if (this.origin === "Delimiter") {
-            this.origin = this.parent.beginning;
-          }
-          if (this.next_cl == null) {
-            this.next_cl = this.parent.end;
-          }
-        }
-        if (this.prev_cl != null) {
-          distance_to_origin = this.getDistanceToOrigin();
-          o = this.prev_cl.next_cl;
-          i = distance_to_origin;
-          while (true) {
-            if (o !== this.next_cl) {
-              if (o.getDistanceToOrigin() === i) {
-                if (o.uid.creator < this.uid.creator) {
-                  this.prev_cl = o;
-                  distance_to_origin = i + 1;
-                } else {
-
-                }
-              } else if (o.getDistanceToOrigin() < i) {
-                if (i - distance_to_origin <= o.getDistanceToOrigin()) {
-                  this.prev_cl = o;
-                  distance_to_origin = i + 1;
-                } else {
-
-                }
-              } else {
-                break;
-              }
-              i++;
-              o = o.next_cl;
-            } else {
-              break;
-            }
-          }
-          this.next_cl = this.prev_cl.next_cl;
-          this.prev_cl.next_cl = this;
-          this.next_cl.prev_cl = this;
-        }
-        this.setParent(this.prev_cl.getParent());
-        Insert.__super__.execute.apply(this, arguments);
-        this.parent.callOperationSpecificInsertEvents(this);
-        return this;
-      }
-    };
-
-    Insert.prototype.getPosition = function() {
-      var position, prev;
-      position = 0;
-      prev = this.prev_cl;
-      while (true) {
-        if (prev instanceof ops.Delimiter) {
-          break;
-        }
-        if (!prev.isDeleted()) {
-          position++;
-        }
-        prev = prev.prev_cl;
-      }
-      return position;
-    };
-
-    Insert.prototype._encode = function(json) {
-      if (json == null) {
-        json = {};
-      }
-      json.prev = this.prev_cl.getUid();
-      json.next = this.next_cl.getUid();
-      if (this.origin.type === "Delimiter") {
-        json.origin = "Delimiter";
-      } else if (this.origin !== this.prev_cl) {
-        json.origin = this.origin.getUid();
-      }
-      json.parent = this.parent.getUid();
-      return Insert.__super__._encode.call(this, json);
-    };
-
-    return Insert;
-
-  })(ops.Operation);
-  ops.Insert.parse = function(json) {
-    var content, content_operations, next, origin, parent, prev, uid;
-    content = json['content'], content_operations = json['content_operations'], uid = json['uid'], prev = json['prev'], next = json['next'], origin = json['origin'], parent = json['parent'];
-    return new this(null, content, content_operations, parent, uid, prev, next, origin);
-  };
-  ops.Delimiter = (function(superClass) {
-    extend(Delimiter, superClass);
-
-    function Delimiter(prev_cl, next_cl, origin) {
-      this.saveOperation('prev_cl', prev_cl);
-      this.saveOperation('next_cl', next_cl);
-      this.saveOperation('origin', prev_cl);
-      Delimiter.__super__.constructor.call(this, null, {
-        noOperation: true
-      });
-    }
-
-    Delimiter.prototype.type = "Delimiter";
-
-    Delimiter.prototype.applyDelete = function() {
-      var o;
-      Delimiter.__super__.applyDelete.call(this);
-      o = this.prev_cl;
-      while (o != null) {
-        o.applyDelete();
-        o = o.prev_cl;
-      }
-      return void 0;
-    };
-
-    Delimiter.prototype.cleanup = function() {
-      return Delimiter.__super__.cleanup.call(this);
-    };
-
-    Delimiter.prototype.execute = function() {
-      var ref, ref1;
-      if (((ref = this.unchecked) != null ? ref['next_cl'] : void 0) != null) {
-        return Delimiter.__super__.execute.apply(this, arguments);
-      } else if ((ref1 = this.unchecked) != null ? ref1['prev_cl'] : void 0) {
-        if (this.validateSavedOperations()) {
-          if (this.prev_cl.next_cl != null) {
-            throw new Error("Probably duplicated operations");
-          }
-          this.prev_cl.next_cl = this;
-          return Delimiter.__super__.execute.apply(this, arguments);
-        } else {
-          return false;
-        }
-      } else if ((this.prev_cl != null) && (this.prev_cl.next_cl == null)) {
-        delete this.prev_cl.unchecked.next_cl;
-        this.prev_cl.next_cl = this;
-        return Delimiter.__super__.execute.apply(this, arguments);
-      } else if ((this.prev_cl != null) || (this.next_cl != null) || true) {
-        return Delimiter.__super__.execute.apply(this, arguments);
-      }
-    };
-
-    Delimiter.prototype._encode = function() {
-      var ref, ref1;
-      return {
-        'type': this.type,
-        'uid': this.getUid(),
-        'prev': (ref = this.prev_cl) != null ? ref.getUid() : void 0,
-        'next': (ref1 = this.next_cl) != null ? ref1.getUid() : void 0
-      };
-    };
-
-    return Delimiter;
-
-  })(ops.Operation);
-  ops.Delimiter.parse = function(json) {
-    var next, prev, uid;
-    uid = json['uid'], prev = json['prev'], next = json['next'];
-    return new this(uid, prev, next);
-  };
-  return {
-    'operations': ops,
-    'execution_listener': execution_listener
-  };
-};

build/node/Operations/Structured.js

@@ -1,579 +0,0 @@
-var basic_ops_uninitialized,
-  extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
-  hasProp = {}.hasOwnProperty;
-
-basic_ops_uninitialized = require("./Basic");
-
-module.exports = function() {
-  var basic_ops, ops;
-  basic_ops = basic_ops_uninitialized();
-  ops = basic_ops.operations;
-  ops.MapManager = (function(superClass) {
-    extend(MapManager, superClass);
-
-    function MapManager(custom_type, uid, content, content_operations) {
-      this._map = {};
-      MapManager.__super__.constructor.call(this, custom_type, uid, content, content_operations);
-    }
-
-    MapManager.prototype.type = "MapManager";
-
-    MapManager.prototype.applyDelete = function() {
-      var name, p, ref;
-      ref = this._map;
-      for (name in ref) {
-        p = ref[name];
-        p.applyDelete();
-      }
-      return MapManager.__super__.applyDelete.call(this);
-    };
-
-    MapManager.prototype.cleanup = function() {
-      return MapManager.__super__.cleanup.call(this);
-    };
-
-    MapManager.prototype.map = function(f) {
-      var n, ref, v;
-      ref = this._map;
-      for (n in ref) {
-        v = ref[n];
-        f(n, v);
-      }
-      return void 0;
-    };
-
-    MapManager.prototype.val = function(name, content) {
-      var o, prop, ref, rep, res, result;
-      if (arguments.length > 1) {
-        if ((content != null) && (content._getModel != null)) {
-          rep = content._getModel(this.custom_types, this.operations);
-        } else {
-          rep = content;
-        }
-        this.retrieveSub(name).replace(rep);
-        return this.getCustomType();
-      } else if (name != null) {
-        prop = this._map[name];
-        if ((prop != null) && !prop.isContentDeleted()) {
-          res = prop.val();
-          if (res instanceof ops.Operation) {
-            return res.getCustomType();
-          } else {
-            return res;
-          }
-        } else {
-          return void 0;
-        }
-      } else {
-        result = {};
-        ref = this._map;
-        for (name in ref) {
-          o = ref[name];
-          if (!o.isContentDeleted()) {
-            result[name] = o.val();
-          }
-        }
-        return result;
-      }
-    };
-
-    MapManager.prototype["delete"] = function(name) {
-      var ref;
-      if ((ref = this._map[name]) != null) {
-        ref.deleteContent();
-      }
-      return this;
-    };
-
-    MapManager.prototype.retrieveSub = function(property_name) {
-      var event_properties, event_this, rm, rm_uid;
-      if (this._map[property_name] == null) {
-        event_properties = {
-          name: property_name
-        };
-        event_this = this;
-        rm_uid = {
-          noOperation: true,
-          sub: property_name,
-          alt: this
-        };
-        rm = new ops.ReplaceManager(null, event_properties, event_this, rm_uid);
-        this._map[property_name] = rm;
-        rm.setParent(this, property_name);
-        rm.execute();
-      }
-      return this._map[property_name];
-    };
-
-    return MapManager;
-
-  })(ops.Operation);
-  ops.MapManager.parse = function(json) {
-    var content, content_operations, custom_type, uid;
-    uid = json['uid'], custom_type = json['custom_type'], content = json['content'], content_operations = json['content_operations'];
-    return new this(custom_type, uid, content, content_operations);
-  };
-  ops.ListManager = (function(superClass) {
-    extend(ListManager, superClass);
-
-    function ListManager(custom_type, uid, content, content_operations) {
-      this.beginning = new ops.Delimiter(void 0, void 0);
-      this.end = new ops.Delimiter(this.beginning, void 0);
-      this.beginning.next_cl = this.end;
-      this.beginning.execute();
-      this.end.execute();
-      ListManager.__super__.constructor.call(this, custom_type, uid, content, content_operations);
-    }
-
-    ListManager.prototype.type = "ListManager";
-
-    ListManager.prototype.applyDelete = function() {
-      var o;
-      o = this.beginning;
-      while (o != null) {
-        o.applyDelete();
-        o = o.next_cl;
-      }
-      return ListManager.__super__.applyDelete.call(this);
-    };
-
-    ListManager.prototype.cleanup = function() {
-      return ListManager.__super__.cleanup.call(this);
-    };
-
-    ListManager.prototype.toJson = function(transform_to_value) {
-      var i, j, len, o, results, val;
-      if (transform_to_value == null) {
-        transform_to_value = false;
-      }
-      val = this.val();
-      results = [];
-      for (o = j = 0, len = val.length; j < len; o = ++j) {
-        i = val[o];
-        if (o instanceof ops.Object) {
-          results.push(o.toJson(transform_to_value));
-        } else if (o instanceof ops.ListManager) {
-          results.push(o.toJson(transform_to_value));
-        } else if (transform_to_value && o instanceof ops.Operation) {
-          results.push(o.val());
-        } else {
-          results.push(o);
-        }
-      }
-      return results;
-    };
-
-    ListManager.prototype.execute = function() {
-      if (this.validateSavedOperations()) {
-        this.beginning.setParent(this);
-        this.end.setParent(this);
-        return ListManager.__super__.execute.apply(this, arguments);
-      } else {
-        return false;
-      }
-    };
-
-    ListManager.prototype.getLastOperation = function() {
-      return this.end.prev_cl;
-    };
-
-    ListManager.prototype.getFirstOperation = function() {
-      return this.beginning.next_cl;
-    };
-
-    ListManager.prototype.toArray = function() {
-      var o, result;
-      o = this.beginning.next_cl;
-      result = [];
-      while (o !== this.end) {
-        if (!o.is_deleted) {
-          result.push(o.val());
-        }
-        o = o.next_cl;
-      }
-      return result;
-    };
-
-    ListManager.prototype.map = function(f) {
-      var o, result;
-      o = this.beginning.next_cl;
-      result = [];
-      while (o !== this.end) {
-        if (!o.is_deleted) {
-          result.push(f(o));
-        }
-        o = o.next_cl;
-      }
-      return result;
-    };
-
-    ListManager.prototype.fold = function(init, f) {
-      var o;
-      o = this.beginning.next_cl;
-      while (o !== this.end) {
-        if (!o.is_deleted) {
-          init = f(init, o);
-        }
-        o = o.next_cl;
-      }
-      return init;
-    };
-
-    ListManager.prototype.val = function(pos) {
-      var o;
-      if (pos != null) {
-        o = this.getOperationByPosition(pos + 1);
-        if (!(o instanceof ops.Delimiter)) {
-          return o.val();
-        } else {
-          throw new Error("this position does not exist");
-        }
-      } else {
-        return this.toArray();
-      }
-    };
-
-    ListManager.prototype.ref = function(pos) {
-      var o;
-      if (pos != null) {
-        o = this.getOperationByPosition(pos + 1);
-        if (!(o instanceof ops.Delimiter)) {
-          return o;
-        } else {
-          return null;
-        }
-      } else {
-        throw new Error("you must specify a position parameter");
-      }
-    };
-
-    ListManager.prototype.getOperationByPosition = function(position) {
-      var o;
-      o = this.beginning;
-      while (true) {
-        if (o instanceof ops.Delimiter && (o.prev_cl != null)) {
-          o = o.prev_cl;
-          while (o.isDeleted() && (o.prev_cl != null)) {
-            o = o.prev_cl;
-          }
-          break;
-        }
-        if (position <= 0 && !o.isDeleted()) {
-          break;
-        }
-        o = o.next_cl;
-        if (!o.isDeleted()) {
-          position -= 1;
-        }
-      }
-      return o;
-    };
-
-    ListManager.prototype.push = function(content) {
-      return this.insertAfter(this.end.prev_cl, [content]);
-    };
-
-    ListManager.prototype.insertAfter = function(left, contents) {
-      var c, j, len, right, tmp;
-      right = left.next_cl;
-      while (right.isDeleted()) {
-        right = right.next_cl;
-      }
-      left = right.prev_cl;
-      if (contents instanceof ops.Operation) {
-        (new ops.Insert(null, content, null, void 0, void 0, left, right)).execute();
-      } else {
-        for (j = 0, len = contents.length; j < len; j++) {
-          c = contents[j];
-          if ((c != null) && (c._name != null) && (c._getModel != null)) {
-            c = c._getModel(this.custom_types, this.operations);
-          }
-          tmp = (new ops.Insert(null, c, null, void 0, void 0, left, right)).execute();
-          left = tmp;
-        }
-      }
-      return this;
-    };
-
-    ListManager.prototype.insert = function(position, contents) {
-      var ith;
-      ith = this.getOperationByPosition(position);
-      return this.insertAfter(ith, contents);
-    };
-
-    ListManager.prototype["delete"] = function(position, length) {
-      var d, delete_ops, i, j, o, ref;
-      if (length == null) {
-        length = 1;
-      }
-      o = this.getOperationByPosition(position + 1);
-      delete_ops = [];
-      for (i = j = 0, ref = length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
-        if (o instanceof ops.Delimiter) {
-          break;
-        }
-        d = (new ops.Delete(null, void 0, o)).execute();
-        o = o.next_cl;
-        while ((!(o instanceof ops.Delimiter)) && o.isDeleted()) {
-          o = o.next_cl;
-        }
-        delete_ops.push(d._encode());
-      }
-      return this;
-    };
-
-    ListManager.prototype.callOperationSpecificInsertEvents = function(op) {
-      var getContentType;
-      getContentType = function(content) {
-        if (content instanceof ops.Operation) {
-          return content.getCustomType();
-        } else {
-          return content;
-        }
-      };
-      return this.callEvent([
-        {
-          type: "insert",
-          reference: op,
-          position: op.getPosition(),
-          object: this.getCustomType(),
-          changedBy: op.uid.creator,
-          value: getContentType(op.val())
-        }
-      ]);
-    };
-
-    ListManager.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {
-      return this.callEvent([
-        {
-          type: "delete",
-          reference: op,
-          position: op.getPosition(),
-          object: this.getCustomType(),
-          length: 1,
-          changedBy: del_op.uid.creator,
-          oldValue: op.val()
-        }
-      ]);
-    };
-
-    return ListManager;
-
-  })(ops.Operation);
-  ops.ListManager.parse = function(json) {
-    var content, content_operations, custom_type, uid;
-    uid = json['uid'], custom_type = json['custom_type'], content = json['content'], content_operations = json['content_operations'];
-    return new this(custom_type, uid, content, content_operations);
-  };
-  ops.Composition = (function(superClass) {
-    extend(Composition, superClass);
-
-    function Composition(custom_type, _composition_value, composition_value_operations, uid, tmp_composition_ref) {
-      var n, o;
-      this._composition_value = _composition_value;
-      Composition.__super__.constructor.call(this, custom_type, uid);
-      if (tmp_composition_ref != null) {
-        this.tmp_composition_ref = tmp_composition_ref;
-      } else {
-        this.composition_ref = this.end.prev_cl;
-      }
-      if (composition_value_operations != null) {
-        this.composition_value_operations = {};
-        for (n in composition_value_operations) {
-          o = composition_value_operations[n];
-          this.saveOperation(n, o, '_composition_value');
-        }
-      }
-    }
-
-    Composition.prototype.type = "Composition";
-
-    Composition.prototype.execute = function() {
-      var composition_ref;
-      if (this.validateSavedOperations()) {
-        this.getCustomType()._setCompositionValue(this._composition_value);
-        delete this._composition_value;
-        if (this.tmp_composition_ref) {
-          composition_ref = this.HB.getOperation(this.tmp_composition_ref);
-          if (composition_ref != null) {
-            delete this.tmp_composition_ref;
-            this.composition_ref = composition_ref;
-          }
-        }
-        return Composition.__super__.execute.apply(this, arguments);
-      } else {
-        return false;
-      }
-    };
-
-    Composition.prototype.callOperationSpecificInsertEvents = function(op) {
-      var o;
-      if (this.tmp_composition_ref != null) {
-        if (op.uid.creator === this.tmp_composition_ref.creator && op.uid.op_number === this.tmp_composition_ref.op_number) {
-          this.composition_ref = op;
-          delete this.tmp_composition_ref;
-          op = op.next_cl;
-          if (op === this.end) {
-            return;
-          }
-        } else {
-          return;
-        }
-      }
-      o = this.end.prev_cl;
-      while (o !== op) {
-        this.getCustomType()._unapply(o.undo_delta);
-        o = o.prev_cl;
-      }
-      while (o !== this.end) {
-        o.undo_delta = this.getCustomType()._apply(o.val());
-        o = o.next_cl;
-      }
-      this.composition_ref = this.end.prev_cl;
-      return this.callEvent([
-        {
-          type: "update",
-          changedBy: op.uid.creator,
-          newValue: this.val()
-        }
-      ]);
-    };
-
-    Composition.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {};
-
-    Composition.prototype.applyDelta = function(delta, operations) {
-      (new ops.Insert(null, delta, operations, this, null, this.end.prev_cl, this.end)).execute();
-      return void 0;
-    };
-
-    Composition.prototype._encode = function(json) {
-      var custom, n, o, ref;
-      if (json == null) {
-        json = {};
-      }
-      custom = this.getCustomType()._getCompositionValue();
-      json.composition_value = custom.composition_value;
-      if (custom.composition_value_operations != null) {
-        json.composition_value_operations = {};
-        ref = custom.composition_value_operations;
-        for (n in ref) {
-          o = ref[n];
-          json.composition_value_operations[n] = o.getUid();
-        }
-      }
-      if (this.composition_ref != null) {
-        json.composition_ref = this.composition_ref.getUid();
-      } else {
-        json.composition_ref = this.tmp_composition_ref;
-      }
-      return Composition.__super__._encode.call(this, json);
-    };
-
-    return Composition;
-
-  })(ops.ListManager);
-  ops.Composition.parse = function(json) {
-    var composition_ref, composition_value, composition_value_operations, custom_type, uid;
-    uid = json['uid'], custom_type = json['custom_type'], composition_value = json['composition_value'], composition_value_operations = json['composition_value_operations'], composition_ref = json['composition_ref'];
-    return new this(custom_type, composition_value, composition_value_operations, uid, composition_ref);
-  };
-  ops.ReplaceManager = (function(superClass) {
-    extend(ReplaceManager, superClass);
-
-    function ReplaceManager(custom_type, event_properties1, event_this1, uid) {
-      this.event_properties = event_properties1;
-      this.event_this = event_this1;
-      if (this.event_properties['object'] == null) {
-        this.event_properties['object'] = this.event_this.getCustomType();
-      }
-      ReplaceManager.__super__.constructor.call(this, custom_type, uid);
-    }
-
-    ReplaceManager.prototype.type = "ReplaceManager";
-
-    ReplaceManager.prototype.callEventDecorator = function(events) {
-      var event, j, len, name, prop, ref;
-      if (!this.isDeleted()) {
-        for (j = 0, len = events.length; j < len; j++) {
-          event = events[j];
-          ref = this.event_properties;
-          for (name in ref) {
-            prop = ref[name];
-            event[name] = prop;
-          }
-        }
-        this.event_this.callEvent(events);
-      }
-      return void 0;
-    };
-
-    ReplaceManager.prototype.callOperationSpecificInsertEvents = function(op) {
-      var old_value;
-      if (op.next_cl.type === "Delimiter" && op.prev_cl.type !== "Delimiter") {
-        if (!op.is_deleted) {
-          old_value = op.prev_cl.val();
-          this.callEventDecorator([
-            {
-              type: "update",
-              changedBy: op.uid.creator,
-              oldValue: old_value
-            }
-          ]);
-        }
-        op.prev_cl.applyDelete();
-      } else if (op.next_cl.type !== "Delimiter") {
-        op.applyDelete();
-      } else {
-        this.callEventDecorator([
-          {
-            type: "add",
-            changedBy: op.uid.creator
-          }
-        ]);
-      }
-      return void 0;
-    };
-
-    ReplaceManager.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {
-      if (op.next_cl.type === "Delimiter") {
-        return this.callEventDecorator([
-          {
-            type: "delete",
-            changedBy: del_op.uid.creator,
-            oldValue: op.val()
-          }
-        ]);
-      }
-    };
-
-    ReplaceManager.prototype.replace = function(content, replaceable_uid) {
-      var o, relp;
-      o = this.getLastOperation();
-      relp = (new ops.Insert(null, content, null, this, replaceable_uid, o, o.next_cl)).execute();
-      return void 0;
-    };
-
-    ReplaceManager.prototype.isContentDeleted = function() {
-      return this.getLastOperation().isDeleted();
-    };
-
-    ReplaceManager.prototype.deleteContent = function() {
-      var last_op;
-      last_op = this.getLastOperation();
-      if ((!last_op.isDeleted()) && last_op.type !== "Delimiter") {
-        (new ops.Delete(null, void 0, this.getLastOperation().uid)).execute();
-      }
-      return void 0;
-    };
-
-    ReplaceManager.prototype.val = function() {
-      var o;
-      o = this.getLastOperation();
-      return typeof o.val === "function" ? o.val() : void 0;
-    };
-
-    return ReplaceManager;
-
-  })(ops.ListManager);
-  return basic_ops;
-};

build/node/y-object.js

@@ -1,90 +0,0 @@
-var bindToChildren;
-
-bindToChildren = function(that) {
-  var attr, i, j, ref;
-  for (i = j = 0, ref = that.children.length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
-    attr = that.children.item(i);
-    if (attr.name != null) {
-      attr.val = that.val.val(attr.name);
-    }
-  }
-  return that.val.observe(function(events) {
-    var event, k, len, newVal, results;
-    results = [];
-    for (k = 0, len = events.length; k < len; k++) {
-      event = events[k];
-      if (event.name != null) {
-        results.push((function() {
-          var l, ref1, results1;
-          results1 = [];
-          for (i = l = 0, ref1 = that.children.length; 0 <= ref1 ? l < ref1 : l > ref1; i = 0 <= ref1 ? ++l : --l) {
-            attr = that.children.item(i);
-            if ((attr.name != null) && attr.name === event.name) {
-              newVal = that.val.val(attr.name);
-              if (attr.val !== newVal) {
-                results1.push(attr.val = newVal);
-              } else {
-                results1.push(void 0);
-              }
-            } else {
-              results1.push(void 0);
-            }
-          }
-          return results1;
-        })());
-      } else {
-        results.push(void 0);
-      }
-    }
-    return results;
-  });
-};
-
-Polymer("y-object", {
-  ready: function() {
-    if (this.connector != null) {
-      this.val = new Y(this.connector);
-      return bindToChildren(this);
-    } else if (this.val != null) {
-      return bindToChildren(this);
-    }
-  },
-  valChanged: function() {
-    if ((this.val != null) && this.val._name === "Object") {
-      return bindToChildren(this);
-    }
-  },
-  connectorChanged: function() {
-    if (this.val == null) {
-      this.val = new Y(this.connector);
-      return bindToChildren(this);
-    }
-  }
-});
-
-Polymer("y-property", {
-  ready: function() {
-    if ((this.val != null) && (this.name != null)) {
-      if (this.val.constructor === Object) {
-        this.val = this.parentElement.val(this.name, new Y.Object(this.val)).val(this.name);
-      } else if (typeof this.val === "string") {
-        this.parentElement.val(this.name, this.val);
-      }
-      if (this.val._name === "Object") {
-        return bindToChildren(this);
-      }
-    }
-  },
-  valChanged: function() {
-    var ref;
-    if ((this.val != null) && (this.name != null)) {
-      if (this.val.constructor === Object) {
-        return this.val = this.parentElement.val.val(this.name, new Y.Object(this.val)).val(this.name);
-      } else if (this.val._name === "Object") {
-        return bindToChildren(this);
-      } else if ((((ref = this.parentElement.val) != null ? ref.val : void 0) != null) && this.val !== this.parentElement.val.val(this.name)) {
-        return this.parentElement.val.val(this.name, this.val);
-      }
-    }
-  }
-});

build/node/y.js

@@ -1,45 +0,0 @@
-var Engine, HistoryBuffer, adaptConnector, createY, structured_ops_uninitialized;
-
-structured_ops_uninitialized = require("./Operations/Structured");
-
-HistoryBuffer = require("./HistoryBuffer");
-
-Engine = require("./Engine");
-
-adaptConnector = require("./ConnectorAdapter");
-
-createY = function(connector) {
-  var HB, ct, engine, model, ops, ops_manager, user_id;
-  user_id = null;
-  if (connector.user_id != null) {
-    user_id = connector.user_id;
-  } else {
-    user_id = "_temp";
-    connector.on_user_id_set = function(id) {
-      user_id = id;
-      return HB.resetUserId(id);
-    };
-  }
-  HB = new HistoryBuffer(user_id);
-  ops_manager = structured_ops_uninitialized(HB, this.constructor);
-  ops = ops_manager.operations;
-  engine = new Engine(HB, ops);
-  adaptConnector(connector, engine, HB, ops_manager.execution_listener);
-  ops.Operation.prototype.HB = HB;
-  ops.Operation.prototype.operations = ops;
-  ops.Operation.prototype.engine = engine;
-  ops.Operation.prototype.connector = connector;
-  ops.Operation.prototype.custom_types = this.constructor;
-  ct = new createY.Object();
-  model = new ops.MapManager(ct, HB.getReservedUniqueIdentifier()).execute();
-  ct._setModel(model);
-  return ct;
-};
-
-module.exports = createY;
-
-if (typeof window !== "undefined" && window !== null) {
-  window.Y = createY;
-}
-
-createY.Object = require("./ObjectType");

build/test/index.html

@@ -1,27 +0,0 @@
-<html>
-<head>
-  <meta charset="utf-8">
-  <title>Test Yjs!</title>
-  <link rel="stylesheet" href="../../node_modules/mocha/mocha.css" />
-</head>
-<body>
-  <div id="mocha"></div>
-  <script src="../../node_modules/mocha/mocha.js" class="awesome"></script>
-  <script>
-    mocha.setup('bdd');
-    mocha.ui('bdd');
-    mocha.reporter('html');
-  </script>
-  <script src="object-test.js"></script>
-  <script src="xml-test.js"></script>
-  <script src="list-test.js"></script>
-  <script src="text-test.js"></script>
-  <script>
-    //mocha.checkLeaks();
-    //mocha.run();
-    window.onerror = null;
-    if (window.mochaPhantomJS) { mochaPhantomJS.run(); }
-    else { mocha.run(); }
-  </script>
-</body>
-</html>

examples/README.md

@@ -1,5 +0,0 @@
-# Examples
-
-Here you find some (hopefully) usefull examples on how to use Yjs!
-
-Feel free to use the code of the examples in your own project. They include basic examples how to use Yjs.

examples/XMPP-Polymer/index.html

@@ -1,14 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-  <head>
-    <meta charset=utf-8 />
-    <title>Y Example</title>
-    <script src="../../../webcomponentsjs/webcomponents.min.js"></script>
-    <link rel="import" href="../../../polymer/polymer.html">
-
-    <link rel="import" href="y-test.html">
-  </head>
-  <body>
-    <y-test></y-test>
-  </body>
-</html>

examples/XMPP-Polymer/y-test.html

@@ -1,57 +0,0 @@
-<script src="../../build/browser/y.js"></script>
-<script src="../../../y-text/build/browser/y-text.js"></script>
-<link rel="import" href="../../build/browser/y-object.html">
-<link rel="import" href="../../../y-xmpp/build/browser/y-xmpp.html">
-<link rel="import" href="../../../paper-slider/paper-slider.html">
-
-<polymer-element name="y-test" attributes="y connector stuff">
-  <template>
-    <h1 id="text" contentEditable> Check this out !</h1>
-    <y-xmpp id="connector" connector={{connector}} room="testy-xmpp-polymer" syncMode="syncAll" debug="true"></y-xmpp>
-    <y-object connector={{connector}} val={{y}}>
-      <y-property name="slider" val={{slider}}>
-      </y-property>
-      <y-property name="stuff" val={{stuff}}>
-        <y-property id="otherstuff" name="otherstuff" val={{otherstuff}}>
-        </y-property>
-      </y-property>
-    </y-object>
-    <y-object val={{otherstuff}}>
-      <y-property name="nostuff" val={{nostuff}}>
-      </y-property>
-    </y-object>
-    <paper-slider min="0" max="200" immediateValue={{slider}}></paper-slider>
-  </template>
-  <script>
-  Polymer({
-    ready: function(){
-      window.y_stuff_property = this.$.otherstuff;
-      this.y.val("slider",50)
-      var that = this;
-      this.connector.whenSynced(function(){
-        if(that.y.val("text") == null){
-          that.y.val("text",new Y.Text("stuff"));
-        }
-        that.y.val("text").bind(that.$.text,that.shadowRoot)
-      })
-
-      // Everything is initialized. Lets test stuff!
-      window.y_test = this;
-      window.y_test.y.val("stuff",{otherstuff:{nostuff:"this is no stuff"}})
-      setTimeout(function(){
-        var res = y_test.y.val("stuff");
-        if(!(y_test.nostuff === "this is no stuff")){
-          console.log("Deep inherit doesn't work!")
-        }
-        window.y_stuff_property.val = {nostuff: "this is also no stuff"};
-        setTimeout(function(){
-          if(!(y_test.nostuff === "this is also no stuff")){
-            console.log("Element val overwrite doesn't work")
-          }
-          console.log("Everything is fine :)");
-        },500)
-      },500);
-    }
-  })
-  </script>
-</polymer-element>

examples/XMPP/index.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-        <meta charset=utf-8 />
-        <title>Y Example</title>
-        <script src="../../build/browser/y.js"></script>
-        <script src="../../../y-text/build/browser/y-text.js"></script>
-        <script src="../../../y-xmpp/y-xmpp.js"></script>
-        <script src="./index.js"></script>
-</head>
-<body>
-<h1 contentEditable> yjs Tutorial</h1>
-<p> Collaborative Json editing with <a href="https://github.com/rwth-acis/yjs/">yjs</a>
-and XMPP Connector. </p>
-
-<textarea style="width:80%;" rows=40 id="textfield"></textarea>
-
-<p> <a href="https://github.com/y-js/yjs/">yjs</a> is a Framework for Real-Time collaboration on arbitrary data types.
-</p>
-</body>
-</html>

examples/XMPP/index.js

@@ -1,26 +0,0 @@
-
-
-connector = new Y.XMPP().join("testy-xmpp-json3", {syncMode: "syncAll"});
-connector.debug = true
-
-y = new Y(connector);
-
-window.onload = function(){
-  var textbox = document.getElementById("textfield");
-  y.observe(function(events){
-    for(var i=0; i<events.length; i++){
-      var event = events[i];
-      if(event.name === "textfield" && event.type !== "delete"){
-        y.val("textfield").bind(textbox);
-        y.val("headline").bind(document.querySelector("h1"))
-      }
-    }
-  });
-  connector.whenSynced(function(){
-    if(y.val("textfield") == null){
-      y.val("headline", new Y.Text("headline"));
-      y.val("textfield",new Y.Text("stuff"))
-    }
-  })
-
-};

examples/ace/index.html

@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style type="text/css" media="screen">
+    #aceContainer {
+        position: absolute;
+        top: 0;
+        right: 0;
+        bottom: 0;
+        left: 0;
+    }
+    .inserted {
+      position:absolute;
+      z-index:20;
+      background-color: #FFC107;
+    }
+    .deleted {
+      position:absolute;
+      z-index:20;
+      background-color: #FFC107;
+    }
+    </style>
+  </head>
+  <body>
+
+    <div id="aceContainer"></div>
+    <script src="../bower_components/yjs/y.js"></script>
+    <script src="../bower_components/ace-builds/src/ace.js"></script>
+
+    <script src="./index.js"></script>
+  </body>
+</html>

examples/ace/index.js

@@ -0,0 +1,24 @@
+/* global Y, ace */
+
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'ace-example'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    ace: 'Text' // y.share.textarea is of type Y.Text
+  }
+}).then(function (y) {
+  window.yAce = y
+
+  // bind the textarea to a shared text element
+  var editor = ace.edit('aceContainer')
+  editor.setTheme('ace/theme/chrome')
+  editor.getSession().setMode('ace/mode/javascript')
+
+  y.share.ace.bindAce(editor)
+})

examples/bower.json

@@ -0,0 +1,29 @@
+{
+  "name": "yjs-examples",
+  "version": "0.0.0",
+  "homepage": "y-js.org",
+  "authors": [
+    "Kevin Jahns <kevin.jahns@rwth-aachen.de>"
+  ],
+  "description": "Examples for Yjs",
+  "license": "MIT",
+  "ignore": [],
+  "dependencies": {
+    "yjs": "latest",
+    "y-array": "latest",
+    "y-map": "latest",
+    "y-memory": "latest",
+    "y-richtext": "latest",
+    "y-webrtc": "latest",
+    "y-websockets-client": "latest",
+    "y-text": "latest",
+    "y-indexeddb": "latest",
+    "y-xml": "latest",
+    "quill": "^1.0.0-rc.2",
+    "ace": "~1.2.3",
+    "ace-builds": "~1.2.3",
+    "jquery": "~2.2.2",
+    "d3": "^3.5.16",
+    "codemirror": "^5.25.0"
+  }
+}

examples/chat/index.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+  <body>
+    <style>
+      #chat p span {
+        color: blue;
+      }
+    </style>
+    <div id="chat"></div>
+    <form id="chatform">
+      <input name="username" type="text" style="width:15%;">
+      <input name="message" type="text" style="width:60%;">
+      <input type="submit" value="Send">
+    </form>
+    <script src="../bower_components/yjs/y.js"></script>
+    <script src="./index.js"></script>
+  </body>
+</html>

examples/chat/index.js

@@ -0,0 +1,73 @@
+/* global Y, chat */
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'chat-example'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    chat: 'Array'
+  }
+}).then(function (y) {
+  window.yChat = y
+  // This functions inserts a message at the specified position in the DOM
+  function appendMessage (message, position) {
+    var p = document.createElement('p')
+    var uname = document.createElement('span')
+    uname.appendChild(document.createTextNode(message.username + ': '))
+    p.appendChild(uname)
+    p.appendChild(document.createTextNode(message.message))
+    document.querySelector('#chat').insertBefore(p, chat.children[position] || null)
+  }
+  // This function makes sure that only 7 messages exist in the chat history.
+  // The rest is deleted
+  function cleanupChat () {
+    if (y.share.chat.length > 7) {
+      y.share.chat.delete(0, y.chat.length - 7)
+    }
+  }
+  // Insert the initial content
+  y.share.chat.toArray().forEach(appendMessage)
+  cleanupChat()
+
+  // whenever content changes, make sure to reflect the changes in the DOM
+  y.share.chat.observe(function (event) {
+    if (event.type === 'insert') {
+      for (let i = 0; i < event.length; i++) {
+        appendMessage(event.values[i], event.index + i)
+      }
+    } else if (event.type === 'delete') {
+      for (let i = 0; i < event.length; i++) {
+        chat.children[event.index].remove()
+      }
+    }
+    // concurrent insertions may result in a history > 7, so cleanup here
+    cleanupChat()
+  })
+  document.querySelector('#chatform').onsubmit = function (event) {
+    // the form is submitted
+    var message = {
+      username: this.querySelector('[name=username]').value,
+      message: this.querySelector('[name=message]').value
+    }
+    if (message.username.length > 0 && message.message.length > 0) {
+      if (y.share.chat.length > 6) {
+        // If we are goint to insert the 8th element, make sure to delete first.
+        y.share.chat.delete(0)
+      }
+      // Here we insert a message in the shared chat type.
+      // This will call the observe function (see line 40)
+      // and reflect the change in the DOM
+      y.share.chat.push([message])
+      this.querySelector('[name=message]').value = ''
+    }
+    // Do not send this form!
+    event.preventDefault()
+    return false
+  }
+})

examples/codemirror/index.html

@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+  <head>
+  </head>
+  <body>
+    <div id="codeMirrorContainer"></div>
+
+    <script src="../bower_components/yjs/y.js"></script>
+    <script src="../bower_components/codemirror/lib/codemirror.js"></script>
+    <script src="../bower_components/codemirror/mode/javascript/javascript.js"></script>
+    <link rel="stylesheet" href="../bower_components/codemirror/lib/codemirror.css">
+    <style>
+      .CodeMirror {
+        position: fixed;
+        top: 0;
+        left: 0;
+        height: 100%;
+        width: 100%;
+      }
+    </style>
+    <script src="./index.js"></script>
+  </body>
+</html>

examples/codemirror/index.js

@@ -0,0 +1,24 @@
+/* global Y, CodeMirror */
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'codemirror-example'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    codemirror: 'Text' // y.share.codemirror is of type Y.Text
+  }
+}).then(function (y) {
+  window.yCodeMirror = y
+
+  var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
+    mode: 'javascript',
+    lineNumbers: true
+  })
+  y.share.codemirror.bindCodeMirror(editor)
+})

examples/drawing/index.html

@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<body>
+  <style>
+    path {
+      fill: none;
+      stroke: blue;
+      stroke-width: 1px;
+      stroke-linejoin: round;
+      stroke-linecap: round;
+    }
+  </style>
+  <button type="button" id="clearDrawingCanvas">Clear Drawing</button>
+  <svg id="drawingCanvas" viewbox="0 0 100 100" width="100%"></svg>
+  <script src="../bower_components/yjs/y.js"></script>
+  <script src="../bower_components/d3/d3.js"></script>
+  <script src="./index.js"></script>
+</body>
+</html>

examples/drawing/index.js

@@ -0,0 +1,84 @@
+/* globals Y, d3 */
+'strict mode'
+
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'drawing-example'
+    // url: 'localhost:1234'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    drawing: 'Array'
+  }
+}).then(function (y) {
+  window.yDrawing = y
+  var drawing = y.share.drawing
+  var renderPath = d3.svg.line()
+    .x(function (d) { return d[0] })
+    .y(function (d) { return d[1] })
+    .interpolate('basis')
+
+  var svg = d3.select('#drawingCanvas')
+    .call(d3.behavior.drag()
+      .on('dragstart', dragstart)
+      .on('drag', drag)
+      .on('dragend', dragend))
+
+  // create line from a shared array object and update the line when the array changes
+  function drawLine (yarray) {
+    var line = svg.append('path').datum(yarray.toArray())
+    line.attr('d', renderPath)
+    yarray.observe(function (event) {
+      // we only implement insert events that are appended to the end of the array
+      event.values.forEach(function (value) {
+        line.datum().push(value)
+      })
+      line.attr('d', renderPath)
+    })
+  }
+  // call drawLine every time an array is appended
+  y.share.drawing.observe(function (event) {
+    if (event.type === 'insert') {
+      event.values.forEach(drawLine)
+    } else {
+      // just remove all elements (thats what we do anyway)
+      svg.selectAll('path').remove()
+    }
+  })
+  // draw all existing content
+  for (var i = 0; i < drawing.length; i++) {
+    drawLine(drawing.get(i))
+  }
+
+  // clear canvas on request
+  document.querySelector('#clearDrawingCanvas').onclick = function () {
+    drawing.delete(0, drawing.length)
+  }
+
+  var sharedLine = null
+  function dragstart () {
+    drawing.insert(drawing.length, [Y.Array])
+    sharedLine = drawing.get(drawing.length - 1)
+  }
+
+  // After one dragged event is recognized, we ignore them for 33ms.
+  var ignoreDrag = null
+  function drag () {
+    if (sharedLine != null && ignoreDrag == null) {
+      ignoreDrag = window.setTimeout(function () {
+        ignoreDrag = null
+      }, 33)
+      sharedLine.push([d3.mouse(this)])
+    }
+  }
+
+  function dragend () {
+    sharedLine = null
+    window.clearTimeout(ignoreDrag)
+    ignoreDrag = null
+  }
+})

examples/jigsaw/index.html

@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <style type="text/css">
+    .draggable {
+      cursor: move;
+    }
+  </style>
+</head>
+<body>
+  <svg id="puzzle-example" width="100%" viewBox="0 0 800 800">
+    <g>
+      <path d="M 311.76636,154.23389 C 312.14136,171.85693 318.14087,184.97998 336.13843,184.23047 C 354.13647,183.48047 351.88647,180.48096 354.88599,178.98096 C 357.8855,177.48096 368.38452,170.35693 380.00806,169.98193 C 424.61841,168.54297 419.78296,223.6001 382.25757,223.6001 C 377.75806,223.6001 363.51001,219.10107 356.38599,211.97656 C 349.26196,204.85254 310.64185,207.10254 314.76636,236.34863 C 316.34888,247.5708 324.08374,267.90723 324.84595,286.23486 C 325.29321,296.99414 323.17603,307.00635 321.58911,315.6377 C 360.11353,305.4585 367.73462,304.30518 404.00513,312.83936 C 410.37915,314.33887 436.62573,310.21436 421.25269,290.3418 C 405.87964,270.46924 406.25464,248.34717 417.12817,240.84814 C 428.00171,233.34912 446.74976,228.84961 457.99829,234.09912 C 469.24683,239.34814 484.61987,255.84619 475.24585,271.59424 C 465.87231,287.34229 452.74878,290.7168 456.49829,303.84033 C 460.2478,316.96387 479.74536,320.33838 500.74292,321.83789 C 509.70142,322.47803 527.97192,323.28467 542.10864,320.12939 C 549.91821,318.38672 556.92212,315.89502 562.46753,313.56396 C 561.40796,277.80664 560.84888,245.71729 560.3606,241.97314 C 558.85278,230.41455 542.49536,217.28564 525.86499,223.2251 C 520.61548,225.1001 519.86548,231.84912 505.24243,232.59912 C 444.92798,235.69238 462.06958,143.26709 525.86499,180.48096 C 539.52759,188.45068 575.19409,190.7583 570.10913,156.85889 C 567.85962,141.86035 553.98608,102.86523 553.98608,102.86523 C 553.98608,102.86523 477.23755,111.82227 451.99878,91.991699 C 441.50024,83.74292 444.87476,69.494629 449.37427,61.245605 C 453.87378,52.996582 465.12231,46.622559 464.74731,36.123779 C 463.02563,-12.086426 392.96704,-10.902832 396.5061,36.873535 C 397.25562,46.997314 406.62964,52.621582 410.75415,60.495605 C 420.00757,78.161377 405.50024,96.073486 384.50757,99.490723 C 377.36206,100.65381 349.17505,102.65332 320.39429,102.23486 C 319.677,102.22461 318.95923,102.21143 318.24194,102.19775 C 315.08423,120.9751 311.55688,144.39697 311.76636,154.23389 z " style="fill:#f2c569;stroke:#000000" id="path2502"/>
+      <path d="M 500.74292,321.83789 C 479.74536,320.33838 460.2478,316.96387 456.49829,303.84033 C 452.74878,290.7168 465.87231,287.34229 475.24585,271.59424 C 484.61987,255.84619 469.24683,239.34814 457.99829,234.09912 C 446.74976,228.84961 428.00171,233.34912 417.12817,240.84814 C 406.25464,248.34717 405.87964,270.46924 421.25269,290.3418 C 436.62573,310.21436 410.37915,314.33887 404.00513,312.83936 C 367.73462,304.30518 360.11353,305.4585 321.58911,315.6377 C 320.56372,321.21484 319.75854,326.2207 320.01538,330.46191 C 320.76538,342.83545 329.3894,385.95508 327.8894,392.7041 C 326.3894,399.45312 313.64136,418.20117 297.89331,407.32715 C 282.14526,396.45361 276.52075,393.4541 265.27222,394.5791 C 254.02368,395.70361 239.77563,402.07812 239.77563,419.32568 C 239.77563,436.57373 250.27417,449.69727 268.64673,447.82227 C 287.36353,445.9126 317.92163,423.11035 325.63989,452.69678 C 330.1394,469.94434 330.51392,487.19238 330.1394,498.44092 C 329.95825,503.87646 326.09985,518.06592 322.16089,531.28125 C 353.2854,532.73682 386.47095,531.26611 394.2561,529.93701 C 430.30933,523.78174 429.31909,496.09766 412.62866,477.44385 C 406.25464,470.31934 401.75513,455.32129 405.87964,444.82275 C 414.07056,423.97314 458.8064,422.17773 473.37134,438.82324 C 483.86987,450.82178 475.99585,477.44385 468.49683,482.69287 C 453.52222,493.17529 457.22485,516.83008 473.37134,528.06201 C 504.79126,549.91943 572.35913,535.56152 572.35913,535.56152 C 572.35913,535.56152 567.85962,498.06592 567.48462,471.81934 C 567.10962,445.57275 589.60669,450.07227 593.3562,450.07227 C 597.10571,450.07227 604.22974,455.32129 609.47925,459.4458 C 614.72876,463.57031 618.85327,469.94434 630.85181,470.69434 C 677.43726,473.60596 674.58813,420.7373 631.97632,413.32666 C 623.35229,411.82666 614.72876,416.32617 603.10522,424.57519 C 591.48169,432.82422 577.23315,425.32519 570.10913,417.45117 C 566.07788,412.99561 563.8479,360.16406 562.46753,313.56396 C 556.92212,315.89502 549.91821,318.38672 542.10864,320.12939 C 527.97192,323.28467 509.70142,322.47803 500.74292,321.83789 z " style="fill:#f3f3d6;stroke:#000000" id="path2504"/>
+      <path d="M 240.52563,141.86035 C 257.60327,159.6499 243.94507,188.68799 214.65356,190.22949 C 185.09448,191.78516 164.66675,157.17822 190.28589,136.61621 C 200.49585,128.42139 198.05786,114.12158 179.78296,106.98975 C 154.4187,97.091553 90.54419,107.73975 90.54419,107.73975 C 90.54419,107.73975 100.88794,135.11328 101.41772,168.48242 C 101.79272,192.104 68.796875,189.47949 63.172607,186.85498 C 57.54834,184.23047 45.924805,173.73145 37.675781,173.73145 C -14.411865,173.73145 -10.013184,245.84375 39.925537,232.22412 C 48.174316,229.97461 56.42334,220.97559 68.796875,222.47559 C 81.17041,223.9751 87.544434,232.59912 87.544434,246.09766 C 87.544434,252.51709 87.0354,281.24268 86.340576,312.87012 C 119.15894,313.67676 160.60962,314.46582 170.03442,313.58887 C 186.15698,312.08936 195.90601,301.59033 188.40698,293.3418 C 180.90796,285.09277 156.16089,256.59619 179.03296,239.34814 C 201.90503,222.10059 235.65112,231.84912 239.77563,247.22217 C 243.90015,262.59521 240.52563,273.46924 234.90112,279.09326 C 229.27661,284.71777 210.52905,298.96582 221.40259,308.71484 C 232.27661,318.46338 263.77222,330.83691 302.39282,320.71338 C 309.58862,318.82715 315.92114,317.13525 321.58911,315.6377 C 323.17603,307.00635 325.29321,296.99414 324.84595,286.23486 C 324.08374,267.90723 316.34888,247.5708 314.76636,236.34863 C 310.64185,207.10254 349.26196,204.85254 356.38599,211.97656 C 363.51001,219.10107 377.75806,223.6001 382.25757,223.6001 C 419.78296,223.6001 424.61841,168.54297 380.00806,169.98193 C 368.38452,170.35693 357.8855,177.48096 354.88599,178.98096 C 351.88647,180.48096 354.13647,183.48047 336.13843,184.23047 C 318.14087,184.97998 312.14136,171.85693 311.76636,154.23389 C 311.55688,144.39697 315.08423,120.9751 318.24194,102.19775 C 290.37524,101.67725 262.46069,98.968262 254.39868,97.991211 C 233.38013,95.443359 217.17456,117.53662 240.52563,141.86035 z " style="fill:#bebcdb;stroke:#000000" id="path2506"/>
+      <path d="M 325.63989,452.69678 C 317.92163,423.11035 287.36353,445.9126 268.64673,447.82227 C 250.27417,449.69727 239.77563,436.57373 239.77563,419.32568 C 239.77563,402.07812 254.02368,395.70361 265.27222,394.5791 C 276.52075,393.4541 282.14526,396.45361 297.89331,407.32715 C 313.64136,418.20117 326.3894,399.45313 327.8894,392.7041 C 329.3894,385.95508 320.76538,342.83545 320.01538,330.46191 C 319.75855,326.2207 320.56372,321.21484 321.58911,315.6377 C 315.92114,317.13525 309.58862,318.82715 302.39282,320.71338 C 263.77222,330.83691 232.27661,318.46338 221.40259,308.71484 C 210.52905,298.96582 229.27661,284.71777 234.90112,279.09326 C 240.52563,273.46924 243.90015,262.59521 239.77563,247.22217 C 235.65112,231.84912 201.90503,222.10059 179.03296,239.34814 C 156.16089,256.59619 180.90796,285.09277 188.40698,293.3418 C 195.90601,301.59033 186.15698,312.08936 170.03442,313.58887 C 160.60962,314.46582 119.15894,313.67676 86.340576,312.87012 C 85.573975,347.74561 84.581299,386.15088 83.794922,402.07812 C 82.295166,432.44922 109.29175,422.32568 115.66577,420.82568 C 122.04028,419.32568 126.16479,409.57715 143.03735,408.45215 C 185.9231,405.59326 186.09985,466.69629 144.16235,467.69482 C 128.41431,468.06982 113.79126,451.19678 108.16675,447.44727 C 102.54272,443.69775 87.919433,442.94775 83.794922,457.9458 C 82.01709,464.41113 78.118652,481.65137 78.098144,496.18994 C 78.071045,515.38037 82.295166,531.81201 82.295166,531.81201 C 82.295166,531.81201 105.54224,526.5625 149.41187,526.5625 C 193.28149,526.5625 199.65552,547.93506 194.78101,558.80859 C 189.90649,569.68213 181.28296,568.93213 179.40796,583.18066 C 172.7063,634.11133 253.34106,631.08203 249.14917,584.68018 C 247.96948,571.62354 237.16528,571.66699 232.27661,557.68359 C 222.17944,528.80273 244.64966,523.56299 257.39819,524.68799 C 263.59351,525.23437 290.95679,529.73389 320.75757,531.21582 C 321.22437,531.23877 321.69312,531.25928 322.16089,531.28125 C 326.09985,518.06592 329.95825,503.87646 330.1394,498.44092 C 330.51392,487.19238 330.1394,469.94434 325.63989,452.69678 z " style="fill:#d3ea9d;stroke:#000000" id="path2508"/>
+		</g>
+  </svg>
+  <script src="../bower_components/yjs/y.js"></script>
+  <script src="../bower_components/d3/d3.js"></script>
+  <script src="./index.js"></script>
+</body>
+</html>

examples/jigsaw/index.js

@@ -0,0 +1,74 @@
+/* @flow */
+/* global Y, d3 */
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'Puzzle-example'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    piece1: 'Map',
+    piece2: 'Map',
+    piece3: 'Map',
+    piece4: 'Map'
+  }
+}).then(function (y) {
+  window.yJigsaw = y
+  var origin // mouse start position - translation of piece
+  var drag = d3.behavior.drag()
+    .on('dragstart', function (params) {
+      // get the translation of the element
+      var translation = d3
+        .select(this)
+        .attr('transform')
+        .slice(10, -1)
+        .split(',')
+        .map(Number)
+      // mouse coordinates
+      var mouse = d3.mouse(this.parentNode)
+      origin = {
+        x: mouse[0] - translation[0],
+        y: mouse[1] - translation[1]
+      }
+    })
+    .on('drag', function () {
+      var mouse = d3.mouse(this.parentNode)
+      var x = mouse[0] - origin.x // =^= mouse - mouse at dragstart + translation at dragstart
+      var y = mouse[1] - origin.y
+      d3.select(this).attr('transform', 'translate(' + x + ',' + y + ')')
+    })
+    .on('dragend', function (piece, i) {
+      // save the current translation of the puzzle piece
+      var mouse = d3.mouse(this.parentNode)
+      var x = mouse[0] - origin.x
+      var y = mouse[1] - origin.y
+      piece.set('translation', {x: x, y: y})
+    })
+
+  var data = [y.share.piece1, y.share.piece2, y.share.piece3, y.share.piece4]
+  var pieces = d3.select(document.querySelector('#puzzle-example')).selectAll('path').data(data)
+
+  pieces
+    .classed('draggable', true)
+    .attr('transform', function (piece) {
+      var translation = piece.get('translation') || {x: 0, y: 0}
+      return 'translate(' + translation.x + ',' + translation.y + ')'
+    }).call(drag)
+
+  data.forEach(function (piece) {
+    piece.observe(function () {
+      // whenever a property of a piece changes, update the translation of the pieces
+      pieces
+        .transition()
+        .attr('transform', function (piece) {
+          var translation = piece.get('translation') || {x: 0, y: 0}
+          return 'translate(' + translation.x + ',' + translation.y + ')'
+        })
+    })
+  })
+})

examples/monaco/index.html

@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+  <head>
+  </head>
+  <body>
+    <div id="monacoContainer"></div>
+    <style>
+      #monacoContainer {
+        position: fixed;
+        top: 0;
+        left: 0;
+        height: 100%;
+        width: 100%;
+      }
+    </style>
+    <script src="../bower_components/yjs/y.js"></script>
+    <script src="../bower_components/y-array/y-array.js"></script>
+    <script src="../bower_components/y-text/y-text.js"></script>
+    <script src="../bower_components/y-websockets-client/y-websockets-client.js"></script>
+    <script src="../bower_components/y-memory/y-memory.js"></script>
+    <script src="../node_modules/monaco-editor/min/vs/loader.js"></script>
+    <script src="./index.js"></script>
+  </body>
+</html>

examples/monaco/index.js

@@ -0,0 +1,30 @@
+/* global Y, monaco */
+
+require.config({ paths: { 'vs': '../node_modules/monaco-editor/min/vs' } })
+
+require(['vs/editor/editor.main'], function () {
+  // Initialize a shared object. This function call returns a promise!
+  Y({
+    db: {
+      name: 'memory'
+    },
+    connector: {
+      name: 'websockets-client',
+      room: 'monaco-example'
+    },
+    sourceDir: '/bower_components',
+    share: {
+      monaco: 'Text' // y.share.monaco is of type Y.Text
+    }
+  }).then(function (y) {
+    window.yMonaco = y
+
+    // Create Monaco editor
+    var editor = monaco.editor.create(document.getElementById('monacoContainer'), {
+      language: 'javascript'
+    })
+
+    // Bind to y.share.monaco
+    y.share.monaco.bindMonaco(editor)
+  })
+})

examples/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "examples",
+  "version": "0.0.0",
+  "description": "",
+  "author": "Kevin Jahns",
+  "license": "MIT",
+  "dependencies": {
+    "monaco-editor": "^0.8.3"
+  },
+  "devDependencies": {
+    "standard": "^10.0.2"
+  },
+  "standard": {
+    "ignore": ["bower_components"]
+  }
+}

examples/quill/index.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <!-- quill does not include dist files! We are using the hosted version instead -->
+  <!--link rel="stylesheet" href="../bower_components/quill/dist/quill.snow.css" /-->
+  <link href="https://cdn.quilljs.com/1.0.4/quill.snow.css" rel="stylesheet">
+  <link href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css" rel="stylesheet">
+  <link href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai-sublime.min.css" rel="stylesheet">
+  <style>
+    #quill-container {
+      border: 1px solid gray;
+      box-shadow: 0px 0px 10px gray;
+    }
+  </style>
+</head>
+<body>
+  <div id="quill-container">
+    <div id="quill">
+    </div>
+  </div>
+
+  <script src="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.js" type="text/javascript"></script>
+  <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/highlight.min.js" type="text/javascript"></script>
+  <script src="https://cdn.quilljs.com/1.0.4/quill.js"></script>
+  <!-- quill does not include dist files! We are using the hosted version instead (see above)
+  <script src="../bower_components/quill/dist/quill.js"></script>
+  -->
+  <script src="../bower_components/yjs/y.js"></script>
+  <script src="./index.js"></script>
+</body>
+</html>

examples/quill/index.js

@@ -0,0 +1,39 @@
+/* global Y, Quill */
+
+// initialize a shared object. This function call returns a promise!
+
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'richtext-example-quill-1.0-test'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    richtext: 'Richtext' // y.share.richtext is of type Y.Richtext
+  }
+}).then(function (y) {
+  window.yQuill = y
+
+  // create quill element
+  window.quill = new Quill('#quill', {
+    modules: {
+      formula: true,
+      syntax: true,
+      toolbar: [
+        [{ size: ['small', false, 'large', 'huge'] }],
+        ['bold', 'italic', 'underline'],
+        [{ color: [] }, { background: [] }],    // Snow theme fills in values
+        [{ script: 'sub' }, { script: 'super' }],
+        ['link', 'image'],
+        ['link', 'code-block'],
+        [{ list: 'ordered' }]
+      ]
+    },
+    theme: 'snow'
+  })
+  // bind quill to richtext type
+  y.share.richtext.bind(window.quill)
+})

examples/serviceworker/index.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <!-- quill does not include dist files! We are using the hosted version instead -->
+  <!--link rel="stylesheet" href="../bower_components/quill/dist/quill.snow.css" /-->
+  <link href="https://cdn.quilljs.com/1.0.4/quill.snow.css" rel="stylesheet">
+  <link href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css" rel="stylesheet">
+  <link href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai-sublime.min.css" rel="stylesheet">
+  <style>
+    #quill-container {
+      border: 1px solid gray;
+      box-shadow: 0px 0px 10px gray;
+    }
+  </style>
+</head>
+<body>
+  <div id="quill-container">
+    <div id="quill">
+    </div>
+  </div>
+
+  <script src="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.js" type="text/javascript"></script>
+  <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/highlight.min.js" type="text/javascript"></script>
+  <script src="https://cdn.quilljs.com/1.0.4/quill.js"></script>
+  <!-- quill does not include dist files! We are using the hosted version instead (see above)
+  <script src="../bower_components/quill/dist/quill.js"></script>
+  -->
+  <script src="../bower_components/yjs/y.js"></script>
+  <script src="./index.js"></script>
+</body>
+</html>

examples/serviceworker/index.js

@@ -0,0 +1,49 @@
+/* global Y, Quill */
+
+// register yjs service worker
+if ('serviceWorker' in navigator) {
+  // Register service worker
+  // it is important to copy yjs-sw-template to the root directory!
+  navigator.serviceWorker.register('./yjs-sw-template.js').then(function (reg) {
+    console.log('Yjs service worker registration succeeded. Scope is ' + reg.scope)
+  }).catch(function (err) {
+    console.error('Yjs service worker registration failed with error ' + err)
+  })
+}
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'serviceworker',
+    room: 'ServiceWorkerExample2'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    richtext: 'Richtext' // y.share.richtext is of type Y.Richtext
+  }
+}).then(function (y) {
+  window.yServiceWorker = y
+
+  // create quill element
+  window.quill = new Quill('#quill', {
+    modules: {
+      formula: true,
+      syntax: true,
+      toolbar: [
+        [{ size: ['small', false, 'large', 'huge'] }],
+        ['bold', 'italic', 'underline'],
+        [{ color: [] }, { background: [] }],    // Snow theme fills in values
+        [{ script: 'sub' }, { script: 'super' }],
+        ['link', 'image'],
+        ['link', 'code-block'],
+        [{ list: 'ordered' }]
+      ]
+    },
+    theme: 'snow'
+  })
+  // bind quill to richtext type
+  y.share.richtext.bind(window.quill)
+})

examples/serviceworker/yjs-sw-template.js

@@ -0,0 +1,22 @@
+/* eslint-env worker */
+
+// copy and modify this file
+
+self.DBConfig = {
+  name: 'indexeddb'
+}
+self.ConnectorConfig = {
+  name: 'websockets-client',
+  // url: '..',
+  options: {
+    jsonp: false
+  }
+}
+
+importScripts(
+  '/bower_components/yjs/y.js',
+  '/bower_components/y-memory/y-memory.js',
+  '/bower_components/y-indexeddb/y-indexeddb.js',
+  '/bower_components/y-websockets-client/y-websockets-client.js',
+  '/bower_components/y-serviceworker/yjs-sw-include.js'
+)

examples/textarea/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+<body>
+  <textarea style="width:80%;" rows=40 id="textfield" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
+  <script src="../../y.js"></script>
+  <script src="../../../y-array/y-array.js"></script>
+  <script src="../../../y-text/dist/y-text.js"></script>
+  <script src="../../../y-memory/y-memory.js"></script>
+  <script src="../../../y-websockets-client/dist/y-websockets-client.js"></script>
+  <script src="./index.js"></script>
+</body>
+</html>

examples/textarea/index.js

@@ -0,0 +1,23 @@
+/* global Y */
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'Textarea-example'
+    // url: '127.0.0.1:1234'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    textarea: 'Text' // y.share.textarea is of type Y.Text
+  }
+}).then(function (y) {
+  window.yTextarea = y
+
+  // bind the textarea to a shared text element
+  y.share.textarea.bind(document.getElementById('textfield'))
+  // thats it..
+})

examples/xml/index.html

@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+</head>
+  <script src="../bower_components/yjs/y.js"></script>
+  <script src="../bower_components/jquery/dist/jquery.min.js"></script>
+  <script src="./index.js"></script>
+</head>
+<body>
+  <h1> Shared DOM Example </h1>
+  <p> Use native DOM function or jQuery to manipulate the shared DOM (window.sharedDom). </p>
+  <div class="command">
+    <button type="button">Execute</button>
+    <input type="text" value='$(sharedDom).append("<h3>Appended headline</h3>")' size="40"/>
+  </div>
+  <div class="command">
+    <button type="button">Execute</button>
+    <input type="text" value='$(sharedDom).attr("align","right")' size="40"/>
+  </div>
+  <div class="command">
+    <button type="button">Execute</button>
+    <input type="text" value='$(sharedDom).attr("style","color:blue;")' size="40"/>
+  </div>
+
+  <script>
+    var commands = document.querySelectorAll(".command");
+    Array.prototype.forEach.call(document.querySelectorAll('.command'), function (command) {
+      var execute = function(){
+        eval(command.querySelector("input").value);
+      }
+      command.querySelector("button").onclick = execute
+      $(command.querySelector("input")).keyup(function (e) {
+        if (e.keyCode == 13) {
+          execute()
+        }
+      })
+    })
+  </script>
+</body>
+</html>

examples/xml/index.js

@@ -0,0 +1,21 @@
+/* global Y */
+
+// initialize a shared object. This function call returns a promise!
+Y({
+  db: {
+    name: 'memory'
+  },
+  connector: {
+    name: 'websockets-client',
+    room: 'Xml-example'
+  },
+  sourceDir: '/bower_components',
+  share: {
+    xml: 'Xml("p")' // y.share.xml is of type Y.Xml with tagname "p"
+  }
+}).then(function (y) {
+  window.yXml = y
+  // bind xml type to a dom, and put it in body
+  window.sharedDom = y.share.xml.getDom()
+  document.body.appendChild(window.sharedDom)
+})

gulpfile.coffee

@@ -1,114 +0,0 @@
-gulp = require('gulp')
-coffee = require('gulp-coffee')
-concat = require('gulp-concat')
-uglify = require 'gulp-uglify'
-sourcemaps = require('gulp-sourcemaps')
-browserify = require('gulp-browserify')
-rename = require 'gulp-rename'
-rimraf = require 'gulp-rimraf'
-gulpif = require 'gulp-if'
-ignore = require 'gulp-ignore'
-git = require 'gulp-git'
-debug = require 'gulp-debug'
-coffeelint = require 'gulp-coffeelint'
-mocha = require 'gulp-mocha'
-run = require 'gulp-run'
-ljs = require 'gulp-ljs'
-plumber = require 'gulp-plumber'
-cache = require 'gulp-cached'
-coffeeify = require 'gulp-coffeeify'
-exit = require 'gulp-exit'
-
-gulp.task 'default', ['build_browser']
-
-files =
-  lib : ['./lib/**/*.coffee']
-  browser : ['./lib/y.coffee','./lib/y-object.coffee']
-  test : ['./test/**/*test.coffee', '../y-*/test/*test.coffee']
-  #test : ['./test/Json_test.coffee', './test/Text_test.coffee']
-  gulp : ['./gulpfile.coffee']
-  examples : ['./examples/**/*.js']
-  other: ['./lib/**/*', './test/*']
-
-files.all = []
-for name,file_list of files
-  if name isnt 'build'
-    files.all = files.all.concat file_list
-
-gulp.task 'deploy_nodejs', ->
-  gulp.src files.lib
-    .pipe sourcemaps.init()
-    .pipe coffee()
-    .pipe sourcemaps.write './'
-    .pipe gulp.dest 'build/node/'
-    .pipe gulpif '!**/', git.add({args : "-A"})
-
-gulp.task 'deploy', ['mocha', 'build_browser', 'deploy_nodejs', 'lint', 'codo']
-
-gulp.task 'build_browser', ->
-  gulp.src files.browser, { read: false }
-    .pipe plumber()
-    .pipe browserify
-      transform: ['coffeeify']
-      extensions: ['.coffee']
-      debug : true
-    .pipe rename
-      extname: ".js"
-    .pipe gulp.dest './build/browser/'
-    .pipe uglify()
-    .pipe gulp.dest '.'
-
-  gulp.src files.test, {read: false}
-    .pipe plumber()
-    .pipe browserify
-      transform: ['coffeeify']
-      extensions: ['.coffee']
-      debug: true
-    .pipe rename
-      extname: ".js"
-      dirname: "./"
-    .pipe gulp.dest './build/test/'
-
-gulp.task 'build_node', ->
-  gulp.src files.lib
-    .pipe plumber()
-    .pipe coffee({bare:true})
-    .pipe gulp.dest './build/node'
-
-gulp.task 'build', ['build_node', 'build_browser'], ->
-
-gulp.task 'watch', ['build'], ->
-  gulp.watch files.all, ['build']
-
-gulp.task 'mocha', ->
-  gulp.src files.test, { read: false }
-    .pipe mocha {reporter : 'list'}
-    .pipe exit()
-
-gulp.task 'lint', ->
-  gulp.src files.all
-    .pipe ignore.include '**/*.coffee'
-    .pipe coffeelint {
-      "max_line_length":
-        "level": "ignore"
-      }
-    .pipe coffeelint.reporter()
-
-gulp.task 'literate', ->
-  gulp.src files.examples
-    .pipe ljs { code : true }
-    .pipe rename
-      basename : "README"
-      extname : ".md"
-    .pipe gulp.dest 'examples/'
-    .pipe gulpif '!**/', git.add({args : "-A"})
-
-gulp.task 'codo', [], ()->
-  command = './node_modules/codo/bin/codo -o "./doc" --name "yjs" --readme "README.md" --undocumented false --private true --title "yjs API" ./lib - LICENSE.txt '
-  run(command).exec()
-
-gulp.task 'clean', ->
-  gulp.src ['./build/{browser,test,node}/**/*.{js,map}','./doc/'], { read: false }
-    .pipe rimraf()
-
-gulp.task 'default', ['clean','build'], ->

lib/ConnectorAdapter.coffee

@@ -1,61 +0,0 @@
-
-ConnectorClass = require "./ConnectorClass"
-#
-# @param {Engine} engine The transformation engine
-# @param {HistoryBuffer} HB
-# @param {Array<Function>} execution_listener You must ensure that whenever an operation is executed, every function in this Array is called.
-#
-adaptConnector = (connector, engine, HB, execution_listener)->
-
-  for name, f of ConnectorClass
-    connector[name] = f
-
-  connector.setIsBoundToY()
-
-  send_ = (o)->
-    if (o.uid.creator is HB.getUserId()) and
-        (typeof o.uid.op_number isnt "string") and # TODO: i don't think that we need this anymore..
-        (HB.getUserId() isnt "_temp")
-      connector.broadcast o
-
-  if connector.invokeSync?
-    HB.setInvokeSyncHandler connector.invokeSync
-
-  execution_listener.push send_
-  # For the XMPPConnector: lets send it as an array
-  # therefore, we have to restructure it later
-  encode_state_vector = (v)->
-    for name,value of v
-      user: name
-      state: value
-  parse_state_vector = (v)->
-    state_vector = {}
-    for s in v
-      state_vector[s.user] = s.state
-    state_vector
-
-  getStateVector = ()->
-    encode_state_vector HB.getOperationCounter()
-
-  getHB = (v)->
-    state_vector = parse_state_vector v
-    hb = HB._encode state_vector
-    json =
-      hb: hb
-      state_vector: encode_state_vector HB.getOperationCounter()
-    json
-
-  applyHB = (hb, fromHB)->
-    engine.applyOp hb, fromHB
-
-  connector.getStateVector = getStateVector
-  connector.getHB = getHB
-  connector.applyHB = applyHB
-
-  connector.receive_handlers ?= []
-  connector.receive_handlers.push (sender, op)->
-    if op.uid.creator isnt HB.getUserId()
-      engine.applyOp op
-
-
-module.exports = adaptConnector

lib/ConnectorClass.coffee

@@ -1,341 +0,0 @@
-
-module.exports =
-  #
-  # @params new Connector(options)
-  #   @param options.syncMethod {String}  is either "syncAll" or "master-slave".
-  #   @param options.role {String} The role of this client
-  #            (slave or master (only used when syncMethod is master-slave))
-  #   @param options.perform_send_again {Boolean} Whetehr to whether to resend the HB after some time period. This reduces sync errors, but has some overhead (optional)
-  #
-  init: (options)->
-    req = (name, choices)=>
-      if options[name]?
-        if (not choices?) or choices.some((c)->c is options[name])
-          @[name] = options[name]
-        else
-          throw new Error "You can set the '"+name+"' option to one of the following choices: "+JSON.encode(choices)
-      else
-        throw new Error "You must specify "+name+", when initializing the Connector!"
-
-    req "syncMethod", ["syncAll", "master-slave"]
-    req "role", ["master", "slave"]
-    req "user_id"
-    @on_user_id_set?(@user_id)
-
-    # whether to resend the HB after some time period. This reduces sync errors.
-    # But this is not necessary in the test-connector
-    if options.perform_send_again?
-      @perform_send_again = options.perform_send_again
-    else
-      @perform_send_again = true
-
-    # A Master should sync with everyone! TODO: really? - for now its safer this way!
-    if @role is "master"
-      @syncMethod = "syncAll"
-
-    # is set to true when this is synced with all other connections
-    @is_synced = false
-    # Peerjs Connections: key: conn-id, value: object
-    @connections = {}
-    # List of functions that shall process incoming data
-    @receive_handlers ?= []
-
-    # whether this instance is bound to any y instance
-    @connections = {}
-    @current_sync_target = null
-    @sent_hb_to_all_users = false
-    @is_initialized = true
-
-  onUserEvent: (f)->
-    @connections_listeners ?= []
-    @connections_listeners.push f
-
-  isRoleMaster: ->
-    @role is "master"
-
-  isRoleSlave: ->
-    @role is "slave"
-
-  findNewSyncTarget: ()->
-    @current_sync_target = null
-    if @syncMethod is "syncAll"
-      for user, c of @connections
-        if not c.is_synced
-          @performSync user
-          break
-    if not @current_sync_target?
-      @setStateSynced()
-    null
-
-  userLeft: (user)->
-    delete @connections[user]
-    @findNewSyncTarget()
-    if @connections_listeners?
-      for f in @connections_listeners
-        f {
-          action: "userLeft"
-          user: user
-        }
-
-
-  userJoined: (user, role)->
-    if not role?
-      throw new Error "Internal: You must specify the role of the joined user! E.g. userJoined('uid:3939','slave')"
-    # a user joined the room
-    @connections[user] ?= {}
-    @connections[user].is_synced = false
-
-    if (not @is_synced) or @syncMethod is "syncAll"
-      if @syncMethod is "syncAll"
-        @performSync user
-      else if role is "master"
-        # TODO: What if there are two masters? Prevent sending everything two times!
-        @performSyncWithMaster user
-
-    if @connections_listeners?
-      for f in @connections_listeners
-        f {
-          action: "userJoined"
-          user: user
-          role: role
-        }
-
-  #
-  # Execute a function _when_ we are connected. If not connected, wait until connected.
-  # @param f {Function} Will be executed on the PeerJs-Connector context.
-  #
-  whenSynced: (args)->
-    if args.constructore is Function
-      args = [args]
-    if @is_synced
-      args[0].apply this, args[1..]
-    else
-      @compute_when_synced ?= []
-      @compute_when_synced.push args
-
-  #
-  # Execute an function when a message is received.
-  # @param f {Function} Will be executed on the PeerJs-Connector context. f will be called with (sender_id, broadcast {true|false}, message).
-  #
-  onReceive: (f)->
-    @receive_handlers.push f
-
-  ###
-  # Broadcast a message to all connected peers.
-  # @param message {Object} The message to broadcast.
-  #
-  broadcast: (message)->
-    throw new Error "You must implement broadcast!"
-
-  #
-  # Send a message to a peer, or set of peers
-  #
-  send: (peer_s, message)->
-    throw new Error "You must implement send!"
-  ###
-
-  #
-  # perform a sync with a specific user.
-  #
-  performSync: (user)->
-    if not @current_sync_target?
-      @current_sync_target = user
-      @send user,
-        sync_step: "getHB"
-        send_again: "true"
-        data: [] # @getStateVector()
-      if not @sent_hb_to_all_users
-        @sent_hb_to_all_users = true
-
-        hb = @getHB([]).hb
-        _hb = []
-        for o in hb
-          _hb.push o
-          if _hb.length > 10
-            @broadcast
-              sync_step: "applyHB_"
-              data: _hb
-            _hb = []
-        @broadcast
-          sync_step: "applyHB"
-          data: _hb
-
-
-
-  #
-  # When a master node joined the room, perform this sync with him. It will ask the master for the HB,
-  # and will broadcast his own HB
-  #
-  performSyncWithMaster: (user)->
-    @current_sync_target = user
-    @send user,
-      sync_step: "getHB"
-      send_again: "true"
-      data: []
-    hb = @getHB([]).hb
-    _hb = []
-    for o in hb
-      _hb.push o
-      if _hb.length > 10
-        @broadcast
-          sync_step: "applyHB_"
-          data: _hb
-        _hb = []
-    @broadcast
-      sync_step: "applyHB"
-      data: _hb
-
-  #
-  # You are sure that all clients are synced, call this function.
-  #
-  setStateSynced: ()->
-    if not @is_synced
-      @is_synced = true
-      if @compute_when_synced?
-        for f in @compute_when_synced
-          f()
-        delete @compute_when_synced
-      null
-
-  #
-  # You received a raw message, and you know that it is intended for to Yjs. Then call this function.
-  #
-  receiveMessage: (sender, res)->
-    if not res.sync_step?
-      for f in @receive_handlers
-        f sender, res
-    else
-      if sender is @user_id
-        return
-      if res.sync_step is "getHB"
-        data = @getHB(res.data)
-        hb = data.hb
-        _hb = []
-        # always broadcast, when not synced.
-        # This reduces errors, when the clients goes offline prematurely.
-        # When this client only syncs to one other clients, but looses connectors,
-        # before syncing to the other clients, the online clients have different states.
-        # Since we do not want to perform regular syncs, this is a good alternative
-        if @is_synced
-          sendApplyHB = (m)=>
-            @send sender, m
-        else
-          sendApplyHB = (m)=>
-            @broadcast m
-
-        for o in hb
-          _hb.push o
-          if _hb.length > 10
-            sendApplyHB
-              sync_step: "applyHB_"
-              data: _hb
-            _hb = []
-
-        sendApplyHB
-          sync_step : "applyHB"
-          data: _hb
-
-        if res.send_again? and @perform_send_again
-          send_again = do (sv = data.state_vector)=>
-            ()=>
-              hb = @getHB(sv).hb
-              for o in hb
-                _hb.push o
-                if _hb.length > 10
-                  @send sender,
-                    sync_step: "applyHB_"
-                    data: _hb
-                  _hb = []
-              @send sender,
-                sync_step: "applyHB",
-                data: _hb
-                sent_again: "true"
-          setTimeout send_again, 3000
-      else if res.sync_step is "applyHB"
-        @applyHB(res.data, sender is @current_sync_target)
-
-        if (@syncMethod is "syncAll" or res.sent_again?) and (not @is_synced) and ((@current_sync_target is sender) or (not @current_sync_target?))
-          @connections[sender].is_synced = true
-          @findNewSyncTarget()
-
-      else if res.sync_step is "applyHB_"
-        @applyHB(res.data, sender is @current_sync_target)
-
-
-  # Currently, the HB encodes operations as JSON. For the moment I want to keep it
-  # that way. Maybe we support encoding in the HB as XML in the future, but for now I don't want
-  # too much overhead. Y is very likely to get changed a lot in the future
-  #
-  # Because we don't want to encode JSON as string (with character escaping, wich makes it pretty much unreadable)
-  # we encode the JSON as XML.
-  #
-  # When the HB support encoding as XML, the format should look pretty much like this.
-
-  # does not support primitive values as array elements
-  # expects an ltx (less than xml) object
-  parseMessageFromXml: (m)->
-    parse_array = (node)->
-      for n in node.children
-        if n.getAttribute("isArray") is "true"
-          parse_array n
-        else
-          parse_object n
-
-    parse_object = (node)->
-      json = {}
-      for name, value  of node.attrs
-        int = parseInt(value)
-        if isNaN(int) or (""+int) isnt value
-          json[name] = value
-        else
-          json[name] = int
-      for n in node.children
-        name = n.name
-        if n.getAttribute("isArray") is "true"
-          json[name] = parse_array n
-        else
-          json[name] = parse_object n
-      json
-    parse_object m
-
-  # encode message in xml
-  # we use string because Strophe only accepts an "xml-string"..
-  # So {a:4,b:{c:5}} will look like
-  # <y a="4">
-  #   <b c="5"></b>
-  # </y>
-  # m - ltx element
-  # json - guess it ;)
-  #
-  encodeMessageToXml: (m, json)->
-    # attributes is optional
-    encode_object = (m, json)->
-      for name,value of json
-        if not value?
-          # nop
-        else if value.constructor is Object
-          encode_object m.c(name), value
-        else if value.constructor is Array
-          encode_array m.c(name), value
-        else
-          m.setAttribute(name,value)
-      m
-    encode_array = (m, array)->
-      m.setAttribute("isArray","true")
-      for e in array
-        if e.constructor is Object
-          encode_object m.c("array-element"), e
-        else
-          encode_array m.c("array-element"), e
-      m
-    if json.constructor is Object
-      encode_object m.c("y",{xmlns:"http://y.ninja/connector-stanza"}), json
-    else if json.constructor is Array
-      encode_array m.c("y",{xmlns:"http://y.ninja/connector-stanza"}), json
-    else
-      throw new Error "I can't encode this json!"
-
-  setIsBoundToY: ()->
-    @on_bound_to_y?()
-    delete @when_bound_to_y
-    @is_bound_to_y = true

lib/Engine.coffee

@@ -1,115 +0,0 @@
-
-window?.unprocessed_counter = 0 # del this
-window?.unprocessed_exec_counter = 0 # TODO
-window?.unprocessed_types = []
-
-#
-# @nodoc
-# The Engine handles how and in which order to execute operations and add operations to the HistoryBuffer.
-#
-class Engine
-
-  #
-  # @param {HistoryBuffer} HB
-  # @param {Object} types list of available types
-  #
-  constructor: (@HB, @types)->
-    @unprocessed_ops = []
-
-  #
-  # Parses an operatio from the json format. It uses the specified parser in your OperationType module.
-  #
-  parseOperation: (json)->
-    type = @types[json.type]
-    if type?.parse?
-      type.parse json
-    else
-      throw new Error "You forgot to specify a parser for type #{json.type}. The message is #{JSON.stringify json}."
-
-
-  #
-  # Apply a set of operations. E.g. the operations you received from another users HB._encode().
-  # @note You must not use this method when you already have ops in your HB!
-  ###
-  applyOpsBundle: (ops_json)->
-    ops = []
-    for o in ops_json
-      ops.push @parseOperation o
-    for o in ops
-      if not o.execute()
-        @unprocessed_ops.push o
-    @tryUnprocessed()
-  ###
-
-  #
-  # Same as applyOps but operations that are already in the HB are not applied.
-  # @see Engine.applyOps
-  #
-  applyOpsCheckDouble: (ops_json)->
-    for o in ops_json
-      if not @HB.getOperation(o.uid)?
-        @applyOp o
-
-  #
-  # Apply a set of operations. (Helper for using applyOp on Arrays)
-  # @see Engine.applyOp
-  applyOps: (ops_json)->
-    @applyOp ops_json
-
-  #
-  # Apply an operation that you received from another peer.
-  # TODO: make this more efficient!!
-  # - operations may only executed in order by creator, order them in object of arrays (key by creator)
-  # - you can probably make something like dependencies (creator1 waits for creator2)
-  applyOp: (op_json_array, fromHB = false)->
-    if op_json_array.constructor isnt Array
-      op_json_array = [op_json_array]
-    for op_json in op_json_array
-      if fromHB
-        op_json.fromHB = "true" # execute immediately, if
-      # $parse_and_execute will return false if $o_json was parsed and executed, otherwise the parsed operadion
-      o = @parseOperation op_json
-      o.parsed_from_json = op_json
-      if op_json.fromHB?
-        o.fromHB = op_json.fromHB
-      # @HB.addOperation o
-      if @HB.getOperation(o)?
-        # nop
-      else if ((not @HB.isExpectedOperation(o)) and (not o.fromHB?)) or (not o.execute())
-        @unprocessed_ops.push o
-        window?.unprocessed_types.push o.type # TODO: delete this
-    @tryUnprocessed()
-
-  #
-  # Call this method when you applied a new operation.
-  # It checks if operations that were previously not executable are now executable.
-  #
-  tryUnprocessed: ()->
-    while true
-      old_length = @unprocessed_ops.length
-      unprocessed = []
-      for op in @unprocessed_ops
-        if @HB.getOperation(op)?
-          # nop
-        else if (not @HB.isExpectedOperation(op) and (not op.fromHB?)) or (not op.execute())
-          unprocessed.push op
-      @unprocessed_ops = unprocessed
-      if @unprocessed_ops.length is old_length
-        break
-    if @unprocessed_ops.length isnt 0
-      @HB.invokeSync()
-
-
-module.exports = Engine
-
-
-
-
-
-
-
-
-
-
-
-

lib/HistoryBuffer.coffee

@@ -1,223 +0,0 @@
-
-#
-# @nodoc
-# An object that holds all applied operations.
-#
-# @note The HistoryBuffer is commonly abbreviated to HB.
-#
-class HistoryBuffer
-
-  #
-  # Creates an empty HB.
-  # @param {Object} user_id Creator of the HB.
-  #
-  constructor: (@user_id)->
-    @operation_counter = {}
-    @buffer = {}
-    @change_listeners = []
-    @garbage = [] # Will be cleaned on next call of garbageCollector
-    @trash = [] # Is deleted. Wait until it is not used anymore.
-    @performGarbageCollection = true
-    @garbageCollectTimeout = 30000
-    @reserved_identifier_counter = 0
-    setTimeout @emptyGarbage, @garbageCollectTimeout
-
-  resetUserId: (id)->
-    own = @buffer[@user_id]
-    if own?
-      for o_name,o of own
-        if o.uid.creator?
-          o.uid.creator = id
-        if o.uid.alt?
-          o.uid.alt.creator = id
-      if @buffer[id]?
-        throw new Error "You are re-assigning an old user id - this is not (yet) possible!"
-      @buffer[id] = own
-      delete @buffer[@user_id]
-    if @operation_counter[@user_id]?
-      @operation_counter[id] = @operation_counter[@user_id]
-      delete @operation_counter[@user_id]
-    @user_id = id
-
-  emptyGarbage: ()=>
-    for o in @garbage
-      #if @getOperationCounter(o.uid.creator) > o.uid.op_number
-      o.cleanup?()
-
-    @garbage = @trash
-    @trash = []
-    if @garbageCollectTimeout isnt -1
-      @garbageCollectTimeoutId = setTimeout @emptyGarbage, @garbageCollectTimeout
-    undefined
-
-  #
-  # Get the user id with wich the History Buffer was initialized.
-  #
-  getUserId: ()->
-    @user_id
-
-  addToGarbageCollector: ()->
-    if @performGarbageCollection
-      for o in arguments
-        if o?
-          @garbage.push o
-
-  stopGarbageCollection: ()->
-    @performGarbageCollection = false
-    @setManualGarbageCollect()
-    @garbage = []
-    @trash = []
-
-  setManualGarbageCollect: ()->
-    @garbageCollectTimeout = -1
-    clearTimeout @garbageCollectTimeoutId
-    @garbageCollectTimeoutId = undefined
-
-  setGarbageCollectTimeout: (@garbageCollectTimeout)->
-
-  #
-  # I propose to use it in your Framework, to create something like a root element.
-  # An operation with this identifier is not propagated to other clients.
-  # This is why everybode must create the same operation with this uid.
-  #
-  getReservedUniqueIdentifier: ()->
-    {
-      creator : '_'
-      op_number : "_#{@reserved_identifier_counter++}"
-    }
-
-  #
-  # Get the operation counter that describes the current state of the document.
-  #
-  getOperationCounter: (user_id)->
-    if not user_id?
-      res = {}
-      for user,ctn of @operation_counter
-        res[user] = ctn
-      res
-    else
-      @operation_counter[user_id]
-
-  isExpectedOperation: (o)->
-    @operation_counter[o.uid.creator] ?= 0
-    o.uid.op_number <= @operation_counter[o.uid.creator]
-    true #TODO: !! this could break stuff. But I dunno why
-
-  #
-  # Encode this operation in such a way that it can be parsed by remote peers.
-  # TODO: Make this more efficient!
-  _encode: (state_vector={})->
-    json = []
-    unknown = (user, o_number)->
-      if (not user?) or (not o_number?)
-        throw new Error "dah!"
-      not state_vector[user]? or state_vector[user] <= o_number
-
-    for u_name,user of @buffer
-      # TODO next, if @state_vector[user] <= state_vector[user]
-      if u_name is "_"
-        continue
-      for o_number,o of user
-        if (not o.uid.noOperation?) and unknown(u_name, o_number)
-          # its necessary to send it, and not known in state_vector
-          o_json = o._encode()
-          if o.next_cl? # applies for all ops but the most right delimiter!
-            # search for the next _known_ operation. (When state_vector is {} then this is the Delimiter)
-            o_next = o.next_cl
-            while o_next.next_cl? and unknown(o_next.uid.creator, o_next.uid.op_number)
-              o_next = o_next.next_cl
-            o_json.next = o_next.getUid()
-          else if o.prev_cl? # most right delimiter only!
-            # same as the above with prev.
-            o_prev = o.prev_cl
-            while o_prev.prev_cl? and unknown(o_prev.uid.creator, o_prev.uid.op_number)
-              o_prev = o_prev.prev_cl
-            o_json.prev = o_prev.getUid()
-          json.push o_json
-
-    json
-
-  #
-  # Get the number of operations that were created by a user.
-  # Accordingly you will get the next operation number that is expected from that user.
-  # This will increment the operation counter.
-  #
-  getNextOperationIdentifier: (user_id)->
-    if not user_id?
-      user_id = @user_id
-    if not @operation_counter[user_id]?
-      @operation_counter[user_id] = 0
-    uid =
-      'creator' : user_id
-      'op_number' : @operation_counter[user_id]
-    @operation_counter[user_id]++
-    uid
-
-  #
-  # Retrieve an operation from a unique id.
-  #
-  # when uid has a "sub" property, the value of it will be applied
-  # on the operations retrieveSub method (which must! be defined)
-  #
-  getOperation: (uid)->
-    if uid.uid?
-      uid = uid.uid
-    o = @buffer[uid.creator]?[uid.op_number]
-    if uid.sub? and o?
-      o.retrieveSub uid.sub
-    else
-      o
-
-  #
-  # Add an operation to the HB. Note that this will not link it against
-  # other operations (it wont executed)
-  #
-  addOperation: (o)->
-    if not @buffer[o.uid.creator]?
-      @buffer[o.uid.creator] = {}
-    if @buffer[o.uid.creator][o.uid.op_number]?
-      throw new Error "You must not overwrite operations!"
-    if (o.uid.op_number.constructor isnt String) and (not @isExpectedOperation(o)) and (not o.fromHB?) # you already do this in the engine, so delete it here!
-      throw new Error "this operation was not expected!"
-    @addToCounter(o)
-    @buffer[o.uid.creator][o.uid.op_number] = o
-    o
-
-  removeOperation: (o)->
-    delete @buffer[o.uid.creator]?[o.uid.op_number]
-
-  # When the HB determines inconsistencies, then the invokeSync
-  # handler wil be called, which should somehow invoke the sync with another collaborator.
-  # The parameter of the sync handler is the user_id with wich an inconsistency was determined
-  setInvokeSyncHandler: (f)->
-    @invokeSync = f
-
-  # empty per default # TODO: do i need this?
-  invokeSync: ()->
-
-  # after you received the HB of another user (in the sync process),
-  # you renew your own state_vector to the state_vector of the other user
-  renewStateVector: (state_vector)->
-    for user,state of state_vector
-      if ((not @operation_counter[user]?) or (@operation_counter[user] < state_vector[user])) and state_vector[user]?
-        @operation_counter[user] = state_vector[user]
-
-  #
-  # Increment the operation_counter that defines the current state of the Engine.
-  #
-  addToCounter: (o)->
-    @operation_counter[o.uid.creator] ?= 0
-    if o.uid.creator isnt @getUserId()
-      # TODO: check if operations are send in order
-      if o.uid.op_number is @operation_counter[o.uid.creator]
-        @operation_counter[o.uid.creator]++
-      while @buffer[o.uid.creator][@operation_counter[o.uid.creator]]?
-        @operation_counter[o.uid.creator]++
-      undefined
-
-    #if @operation_counter[o.uid.creator] isnt (o.uid.op_number + 1)
-      #console.log (@operation_counter[o.uid.creator] - (o.uid.op_number + 1))
-      #console.log o
-      #throw new Error "You don't receive operations in the proper order. Try counting like this 0,1,2,3,4,.. ;)"
-
-module.exports = HistoryBuffer

lib/ObjectType.coffee

@@ -1,74 +0,0 @@
-
-class YObject
-
-  constructor: (@_object = {})->
-    if @_object.constructor is Object
-      for name, val of @_object
-        if val.constructor is Object
-          @_object[name] = new YObject(val)
-    else
-      throw new Error "Y.Object accepts Json Objects only"
-
-  _name: "Object"
-
-  _getModel: (types, ops)->
-    if not @_model?
-      @_model = new ops.MapManager(@).execute()
-      for n,o of @_object
-        @_model.val n, o
-    delete @_object
-    @_model
-
-  _setModel: (@_model)->
-    delete @_object
-
-  observe: (f)->
-    @_model.observe f
-    @
-
-  unobserve: (f)->
-    @_model.unobserve f
-    @
-
-  #
-  # @overload val()
-  #   Get this as a Json object.
-  #   @return [Json]
-  #
-  # @overload val(name)
-  #   Get value of a property.
-  #   @param {String} name Name of the object property.
-  #   @return [*] Depends on the value of the property.
-  #
-  # @overload val(name, content)
-  #   Set a new property.
-  #   @param {String} name Name of the object property.
-  #   @param {Object|String} content Content of the object property.
-  #   @return [Object Type] This object. (supports chaining)
-  #
-  val: (name, content)->
-    if @_model?
-      @_model.val.apply @_model, arguments
-    else
-      if content?
-        @_object[name] = content
-      else if name?
-        @_object[name]
-      else
-        res = {}
-        for n,v of @_object
-          res[n] = v
-        res
-
-  delete: (name)->
-    @_model.delete(name)
-    @
-
-if window?
-  if window.Y?
-    window.Y.Object = YObject
-  else
-    throw new Error "You must first import Y!"
-
-if module?
-  module.exports = YObject

lib/Operations/Basic.coffee

@@ -1,678 +0,0 @@
-module.exports = ()->
-  # @see Engine.parse
-  ops = {}
-  execution_listener = []
-
-  #
-  # @private
-  # @abstract
-  # @nodoc
-  # A generic interface to ops.
-  #
-  # An operation has the following methods:
-  # * _encode: encodes an operation (needed only if instance of this operation is sent).
-  # * execute: execute the effects of this operations. Good examples are Insert-type and AddName-type
-  # * val: in the case that the operation holds a value
-  #
-  # Furthermore an encodable operation has a parser. We extend the parser object in order to parse encoded operations.
-  #
-  class ops.Operation
-
-    #
-    # @param {Object} uid A unique identifier.
-    # If uid is undefined, a new uid will be created before at the end of the execution sequence
-    #
-    constructor: (custom_type, uid, content, content_operations)->
-      if custom_type?
-        @custom_type = custom_type
-      @is_deleted = false
-      @garbage_collected = false
-      @event_listeners = [] # TODO: rename to observers or sth like that
-      if uid?
-        @uid = uid
-
-      # see encode to see, why we are doing it this way
-      if content is undefined
-        # nop
-      else if content? and content.creator?
-        @saveOperation 'content', content
-      else
-        @content = content
-      if content_operations?
-        @content_operations = {}
-        for name, op of content_operations
-          @saveOperation name, op, 'content_operations'
-
-    type: "Operation"
-
-    getContent: (name)->
-      if @content?
-        if @content.getCustomType?
-          @content.getCustomType()
-        else if @content.constructor is Object
-          if name?
-            if @content[name]?
-              @content[name]
-            else
-              @content_operations[name].getCustomType()
-          else
-            content = {}
-            for n,v of @content
-              content[n] = v
-            if @content_operations?
-              for n,v of @content_operations
-                v = v.getCustomType()
-                content[n] = v
-            content
-        else
-          @content
-      else
-        @content
-
-    retrieveSub: ()->
-      throw new Error "sub properties are not enable on this operation type!"
-
-    #
-    # Add an event listener. It depends on the operation which events are supported.
-    # @param {Function} f f is executed in case the event fires.
-    #
-    observe: (f)->
-      @event_listeners.push f
-
-    #
-    # Deletes function from the observer list
-    # @see Operation.observe
-    #
-    # @overload unobserve(event, f)
-    #   @param f     {Function} The function that you want to delete
-    unobserve: (f)->
-      @event_listeners = @event_listeners.filter (g)->
-        f isnt g
-
-    #
-    # Deletes all subscribed event listeners.
-    # This should be called, e.g. after this has been replaced.
-    # (Then only one replace event should fire. )
-    # This is also called in the cleanup method.
-    deleteAllObservers: ()->
-      @event_listeners = []
-
-    delete: ()->
-      (new ops.Delete undefined, @).execute()
-      null
-
-    #
-    # Fire an event.
-    # TODO: Do something with timeouts. You don't want this to fire for every operation (e.g. insert).
-    # TODO: do you need callEvent+forwardEvent? Only one suffices probably
-    callEvent: ()->
-      if @custom_type?
-        callon = @getCustomType()
-      else
-        callon = @
-      @forwardEvent callon, arguments...
-
-    #
-    # Fire an event and specify in which context the listener is called (set 'this').
-    # TODO: do you need this ?
-    forwardEvent: (op, args...)->
-      for f in @event_listeners
-        f.call op, args...
-
-    isDeleted: ()->
-      @is_deleted
-
-    applyDelete: (garbagecollect = true)->
-      if not @garbage_collected
-        #console.log "applyDelete: #{@type}"
-        @is_deleted = true
-        if garbagecollect
-          @garbage_collected = true
-          @HB.addToGarbageCollector @
-
-    cleanup: ()->
-      #console.log "cleanup: #{@type}"
-      @HB.removeOperation @
-      @deleteAllObservers()
-
-    #
-    # Set the parent of this operation.
-    #
-    setParent: (@parent)->
-
-    #
-    # Get the parent of this operation.
-    #
-    getParent: ()->
-      @parent
-
-    #
-    # Computes a unique identifier (uid) that identifies this operation.
-    #
-    getUid: ()->
-      if not @uid.noOperation?
-        @uid
-      else
-        if @uid.alt? # could be (safely) undefined
-          map_uid = @uid.alt.cloneUid()
-          map_uid.sub = @uid.sub
-          map_uid
-        else
-          undefined
-
-    cloneUid: ()->
-      uid = {}
-      for n,v of @getUid()
-        uid[n] = v
-      uid
-
-    #
-    # @private
-    # If not already done, set the uid
-    # Add this to the HB
-    # Notify the all the listeners.
-    #
-    execute: ()->
-      if @validateSavedOperations()
-        @is_executed = true
-        if not @uid?
-          # When this operation was created without a uid, then set it here.
-          # There is only one other place, where this can be done - before an Insertion
-          # is executed (because we need the creator_id)
-          @uid = @HB.getNextOperationIdentifier()
-        if not @uid.noOperation?
-          @HB.addOperation @
-          for l in execution_listener
-            l @_encode()
-        @
-      else
-        false
-
-    #
-    # @private
-    # Operations may depend on other operations (linked lists, etc.).
-    # The saveOperation and validateSavedOperations methods provide
-    # an easy way to refer to these operations via an uid or object reference.
-    #
-    # For example: We can create a new Delete operation that deletes the operation $o like this
-    #     - var d = new Delete(uid, $o);   or
-    #     - var d = new Delete(uid, $o.getUid());
-    # Either way we want to access $o via d.deletes. In the second case validateSavedOperations must be called first.
-    #
-    # @overload saveOperation(name, op_uid)
-    #   @param {String} name The name of the operation. After validating (with validateSavedOperations) the instantiated operation will be accessible via this[name].
-    #   @param {Object} op_uid A uid that refers to an operation
-    # @overload saveOperation(name, op)
-    #   @param {String} name The name of the operation. After calling this function op is accessible via this[name].
-    #   @param {Operation} op An Operation object
-    #
-    saveOperation: (name, op, base = "this")->
-      if op? and op._getModel?
-        op = op._getModel(@custom_types, @operations)
-      #
-      # Every instance of $Operation must have an $execute function.
-      # We use duck-typing to check if op is instantiated since there
-      # could exist multiple classes of $Operation
-      #
-      if not op?
-        # nop
-      else if op.execute? or not (op.op_number? and op.creator?)
-        # is instantiated, or op is string. Currently "Delimiter" is saved as string
-        # (in combination with @parent you can retrieve the delimiter..)
-        if base is "this"
-          @[name] = op
-        else
-          dest = @[base]
-          paths = name.split("/")
-          last_path = paths.pop()
-          for path in paths
-            dest = dest[path]
-          dest[last_path] = op
-      else
-        # not initialized. Do it when calling $validateSavedOperations()
-        @unchecked ?= {}
-        @unchecked[base] ?= {}
-        @unchecked[base][name] = op
-
-    #
-    # @private
-    # After calling this function all not instantiated operations will be accessible.
-    # @see Operation.saveOperation
-    #
-    # @return [Boolean] Whether it was possible to instantiate all operations.
-    #
-    validateSavedOperations: ()->
-      uninstantiated = {}
-      success = true
-      for base_name, base of @unchecked
-        for name, op_uid of base
-          op = @HB.getOperation op_uid
-          if op
-            if base_name is "this"
-              @[name] = op
-            else
-              dest = @[base_name]
-              paths = name.split("/")
-              last_path = paths.pop()
-              for path in paths
-                dest = dest[path]
-              dest[last_path] = op
-          else
-            uninstantiated[base_name] ?= {}
-            uninstantiated[base_name][name] = op_uid
-            success = false
-      if not success
-        @unchecked = uninstantiated
-        return false
-      else
-        delete @unchecked
-        return @
-
-    getCustomType: ()->
-      if not @custom_type?
-        # throw new Error "This operation was not initialized with a custom type"
-        @
-      else
-        if @custom_type.constructor is String
-          # has not been initialized yet (only the name is specified)
-          Type = @custom_types
-          for t in @custom_type.split(".")
-            Type = Type[t]
-          @custom_type = new Type()
-          @custom_type._setModel @
-        @custom_type
-
-    #
-    # @private
-    # Encode this operation in such a way that it can be parsed by remote peers.
-    #
-    _encode: (json = {})->
-      json.type = @type
-      json.uid = @getUid()
-      if @custom_type?
-        if @custom_type.constructor is String
-          json.custom_type = @custom_type
-        else
-          json.custom_type = @custom_type._name
-
-      if @content?.getUid?
-        json.content = @content.getUid()
-      else
-        json.content = @content
-      if @content_operations?
-        operations = {}
-        for n,o of @content_operations
-          if o._getModel?
-            o = o._getModel(@custom_types, @operations)
-          operations[n] = o.getUid()
-        json.content_operations = operations
-      json
-
-  #
-  # @nodoc
-  # A simple Delete-type operation that deletes an operation.
-  #
-  class ops.Delete extends ops.Operation
-
-    #
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    # @param {Object} deletes UID or reference of the operation that this to be deleted.
-    #
-    constructor: (custom_type, uid, deletes)->
-      @saveOperation 'deletes', deletes
-      super custom_type, uid
-
-    type: "Delete"
-
-    #
-    # @private
-    # Convert all relevant information of this operation to the json-format.
-    # This result can be sent to other clients.
-    #
-    _encode: ()->
-      {
-        'type': "Delete"
-        'uid': @getUid()
-        'deletes': @deletes.getUid()
-      }
-
-    #
-    # @private
-    # Apply the deletion.
-    #
-    execute: ()->
-      if @validateSavedOperations()
-        res = super
-        if res
-          @deletes.applyDelete @
-        res
-      else
-        false
-
-  #
-  # Define how to parse Delete operations.
-  #
-  ops.Delete.parse = (o)->
-    {
-      'uid' : uid
-      'deletes': deletes_uid
-    } = o
-    new this(null, uid, deletes_uid)
-
-  #
-  # @nodoc
-  # A simple insert-type operation.
-  #
-  # An insert operation is always positioned between two other insert operations.
-  # Internally this is realized as associative lists, whereby each insert operation has a predecessor and a successor.
-  # For the sake of efficiency we maintain two lists:
-  #   - The short-list (abbrev. sl) maintains only the operations that are not deleted (unimplemented, good idea?)
-  #   - The complete-list (abbrev. cl) maintains all operations
-  #
-  class ops.Insert extends ops.Operation
-
-    #
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    # @param {Operation} prev_cl The predecessor of this operation in the complete-list (cl)
-    # @param {Operation} next_cl The successor of this operation in the complete-list (cl)
-    #
-    constructor: (custom_type, content, content_operations, parent, uid, prev_cl, next_cl, origin)->
-      @saveOperation 'parent', parent
-      @saveOperation 'prev_cl', prev_cl
-      @saveOperation 'next_cl', next_cl
-      if origin?
-        @saveOperation 'origin', origin
-      else
-        @saveOperation 'origin', prev_cl
-      super custom_type, uid, content, content_operations
-
-    type: "Insert"
-
-    val: ()->
-      @getContent()
-
-    getNext: (i=1)->
-      n = @
-      while i > 0 and n.next_cl?
-        n = n.next_cl
-        if not n.is_deleted
-          i--
-      if n.is_deleted
-        null
-      n
-
-    getPrev: (i=1)->
-      n = @
-      while i > 0 and n.prev_cl?
-        n = n.prev_cl
-        if not n.is_deleted
-          i--
-      if n.is_deleted
-        null
-      else
-        n
-
-    #
-    # set content to null and other stuff
-    # @private
-    #
-    applyDelete: (o)->
-      @deleted_by ?= []
-      callLater = false
-      if @parent? and not @is_deleted and o? # o? : if not o?, then the delimiter deleted this Insertion. Furthermore, it would be wrong to call it. TODO: make this more expressive and save
-        # call iff wasn't deleted earlyer
-        callLater = true
-      if o?
-        @deleted_by.push o
-      garbagecollect = false
-      if @next_cl.isDeleted()
-        garbagecollect = true
-      super garbagecollect
-      if callLater
-        @parent.callOperationSpecificDeleteEvents(this, o)
-      if @prev_cl? and @prev_cl.isDeleted()
-        # garbage collect prev_cl
-        @prev_cl.applyDelete()
-
-    cleanup: ()->
-      if @next_cl.isDeleted()
-        # delete all ops that delete this insertion
-        for d in @deleted_by
-          d.cleanup()
-
-        # throw new Error "right is not deleted. inconsistency!, wrararar"
-        # change origin references to the right
-        o = @next_cl
-        while o.type isnt "Delimiter"
-          if o.origin is @
-            o.origin = @prev_cl
-          o = o.next_cl
-        # reconnect left/right
-        @prev_cl.next_cl = @next_cl
-        @next_cl.prev_cl = @prev_cl
-
-        # delete content
-        # - we must not do this in applyDelete, because this would lead to inconsistencies
-        # (e.g. the following operation order must be invertible :
-        #   Insert refers to content, then the content is deleted)
-        # Therefore, we have to do this in the cleanup
-        # * NODE: We never delete Insertions!
-        if @content instanceof ops.Operation and not (@content instanceof ops.Insert)
-          @content.referenced_by--
-          if @content.referenced_by <= 0 and not @content.is_deleted
-            @content.applyDelete()
-        delete @content
-        super
-      # else
-      #   Someone inserted something in the meantime.
-      #   Remember: this can only be garbage collected when next_cl is deleted
-
-    #
-    # @private
-    # The amount of positions that $this operation was moved to the right.
-    #
-    getDistanceToOrigin: ()->
-      d = 0
-      o = @prev_cl
-      while true
-        if @origin is o
-          break
-        d++
-        o = o.prev_cl
-      d
-
-    #
-    # @private
-    # Include this operation in the associative lists.
-    execute: ()->
-      if not @validateSavedOperations()
-        return false
-      else
-        if @content instanceof ops.Operation
-          @content.insert_parent = @ # TODO: this is probably not necessary and only nice for debugging
-          @content.referenced_by ?= 0
-          @content.referenced_by++
-        if @parent?
-          if not @prev_cl?
-            @prev_cl = @parent.beginning
-          if not @origin?
-            @origin = @prev_cl
-          else if @origin is "Delimiter"
-            @origin = @parent.beginning
-          if not @next_cl?
-            @next_cl = @parent.end
-        if @prev_cl?
-          distance_to_origin = @getDistanceToOrigin() # most cases: 0
-          o = @prev_cl.next_cl
-          i = distance_to_origin # loop counter
-
-          # $this has to find a unique position between origin and the next known character
-          # case 1: $origin equals $o.origin: the $creator parameter decides if left or right
-          #         let $OL= [o1,o2,o3,o4], whereby $this is to be inserted between o1 and o4
-          #         o2,o3 and o4 origin is 1 (the position of o2)
-          #         there is the case that $this.creator < o2.creator, but o3.creator < $this.creator
-          #         then o2 knows o3. Since on another client $OL could be [o1,o3,o4] the problem is complex
-          #         therefore $this would be always to the right of o3
-          # case 2: $origin < $o.origin
-          #         if current $this insert_position > $o origin: $this ins
-          #         else $insert_position will not change
-          #         (maybe we encounter case 1 later, then this will be to the right of $o)
-          # case 3: $origin > $o.origin
-          #         $this insert_position is to the left of $o (forever!)
-          while true
-            if o isnt @next_cl
-              # $o happened concurrently
-              if o.getDistanceToOrigin() is i
-                # case 1
-                if o.uid.creator < @uid.creator
-                  @prev_cl = o
-                  distance_to_origin = i + 1
-                else
-                  # nop
-              else if o.getDistanceToOrigin() < i
-                # case 2
-                if i - distance_to_origin <= o.getDistanceToOrigin()
-                  @prev_cl = o
-                  distance_to_origin = i + 1
-                else
-                  #nop
-              else
-                # case 3
-                break
-              i++
-              o = o.next_cl
-            else
-              # $this knows that $o exists,
-              break
-          # now reconnect everything
-          @next_cl = @prev_cl.next_cl
-          @prev_cl.next_cl = @
-          @next_cl.prev_cl = @
-
-        @setParent @prev_cl.getParent() # do Insertions always have a parent?
-        super # notify the execution_listeners
-        @parent.callOperationSpecificInsertEvents(this)
-        @
-
-    #
-    # Compute the position of this operation.
-    #
-    getPosition: ()->
-      position = 0
-      prev = @prev_cl
-      while true
-        if prev instanceof ops.Delimiter
-          break
-        if not prev.isDeleted()
-          position++
-        prev = prev.prev_cl
-      position
-
-    #
-    # Convert all relevant information of this operation to the json-format.
-    # This result can be send to other clients.
-    #
-    _encode: (json = {})->
-      json.prev = @prev_cl.getUid()
-      json.next = @next_cl.getUid()
-
-      if @origin.type is "Delimiter"
-        json.origin = "Delimiter"
-      else if @origin isnt @prev_cl
-        json.origin = @origin.getUid()
-
-      # if not (json.prev? and json.next?)
-      json.parent = @parent.getUid()
-
-      super json
-
-  ops.Insert.parse = (json)->
-    {
-      'content' : content
-      'content_operations' : content_operations
-      'uid' : uid
-      'prev': prev
-      'next': next
-      'origin' : origin
-      'parent' : parent
-    } = json
-    new this null, content, content_operations, parent, uid, prev, next, origin
-
-  #
-  # @nodoc
-  # A delimiter is placed at the end and at the beginning of the associative lists.
-  # This is necessary in order to have a beginning and an end even if the content
-  # of the Engine is empty.
-  #
-  class ops.Delimiter extends ops.Operation
-    #
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    # @param {Operation} prev_cl The predecessor of this operation in the complete-list (cl)
-    # @param {Operation} next_cl The successor of this operation in the complete-list (cl)
-    #
-    constructor: (prev_cl, next_cl, origin)->
-      @saveOperation 'prev_cl', prev_cl
-      @saveOperation 'next_cl', next_cl
-      @saveOperation 'origin', prev_cl
-      super null, {noOperation: true}
-
-    type: "Delimiter"
-
-    applyDelete: ()->
-      super()
-      o = @prev_cl
-      while o?
-        o.applyDelete()
-        o = o.prev_cl
-      undefined
-
-    cleanup: ()->
-      super()
-
-    #
-    # @private
-    #
-    execute: ()->
-      if @unchecked?['next_cl']?
-        super
-      else if @unchecked?['prev_cl']
-        if @validateSavedOperations()
-          if @prev_cl.next_cl?
-            throw new Error "Probably duplicated operations"
-          @prev_cl.next_cl = @
-          super
-        else
-          false
-      else if @prev_cl? and not @prev_cl.next_cl?
-        delete @prev_cl.unchecked.next_cl
-        @prev_cl.next_cl = @
-        super
-      else if @prev_cl? or @next_cl? or true # TODO: are you sure? This can happen right?
-        super
-      #else
-      #  throw new Error "Delimiter is unsufficient defined!"
-
-    #
-    # @private
-    #
-    _encode: ()->
-      {
-        'type' : @type
-        'uid' : @getUid()
-        'prev' : @prev_cl?.getUid()
-        'next' : @next_cl?.getUid()
-      }
-
-  ops.Delimiter.parse = (json)->
-    {
-    'uid' : uid
-    'prev' : prev
-    'next' : next
-    } = json
-    new this(uid, prev, next)
-
-  # This is what this module exports after initializing it with the HistoryBuffer
-  {
-    'operations' : ops
-    'execution_listener' : execution_listener
-  }

lib/Operations/Structured.coffee

@@ -1,533 +0,0 @@
-basic_ops_uninitialized = require "./Basic"
-
-module.exports = ()->
-  basic_ops = basic_ops_uninitialized()
-  ops = basic_ops.operations
-
-  #
-  # @nodoc
-  # Manages map like objects. E.g. Json-Type and XML attributes.
-  #
-  class ops.MapManager extends ops.Operation
-
-    #
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    #
-    constructor: (custom_type, uid, content, content_operations)->
-      @_map = {}
-      super custom_type, uid, content, content_operations
-
-    type: "MapManager"
-
-    applyDelete: ()->
-      for name,p of @_map
-        p.applyDelete()
-      super()
-
-    cleanup: ()->
-      super()
-
-    map: (f)->
-      for n,v of @_map
-        f(n,v)
-      undefined
-
-    #
-    # @see JsonOperations.val
-    #
-    val: (name, content)->
-      if arguments.length > 1
-        if content? and content._getModel?
-          rep = content._getModel(@custom_types, @operations)
-        else
-          rep = content
-        @retrieveSub(name).replace rep
-        @getCustomType()
-      else if name?
-        prop = @_map[name]
-        if prop? and not prop.isContentDeleted()
-          res = prop.val()
-          if res instanceof ops.Operation
-            res.getCustomType()
-          else
-            res
-        else
-          undefined
-      else
-        result = {}
-        for name,o of @_map
-          if not o.isContentDeleted()
-            result[name] = o.val()
-        result
-
-    delete: (name)->
-      @_map[name]?.deleteContent()
-      @
-
-    retrieveSub: (property_name)->
-      if not @_map[property_name]?
-        event_properties =
-          name: property_name
-        event_this = @
-        rm_uid =
-          noOperation: true
-          sub: property_name
-          alt: @
-        rm = new ops.ReplaceManager null, event_properties, event_this, rm_uid # this operation shall not be saved in the HB
-        @_map[property_name] = rm
-        rm.setParent @, property_name
-        rm.execute()
-      @_map[property_name]
-
-  ops.MapManager.parse = (json)->
-    {
-      'uid' : uid
-      'custom_type' : custom_type
-      'content' : content
-      'content_operations' : content_operations
-    } = json
-    new this(custom_type, uid, content, content_operations)
-
-
-
-  #
-  # @nodoc
-  # Manages a list of Insert-type operations.
-  #
-  class ops.ListManager extends ops.Operation
-
-    #
-    # A ListManager maintains a non-empty list that has a beginning and an end (both Delimiters!)
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    # @param {Delimiter} beginning Reference or Object.
-    # @param {Delimiter} end Reference or Object.
-    constructor: (custom_type, uid, content, content_operations)->
-      @beginning = new ops.Delimiter undefined, undefined
-      @end =       new ops.Delimiter @beginning, undefined
-      @beginning.next_cl = @end
-      @beginning.execute()
-      @end.execute()
-      super custom_type, uid, content, content_operations
-
-    type: "ListManager"
-
-
-    applyDelete: ()->
-      o = @beginning
-      while o?
-        o.applyDelete()
-        o = o.next_cl
-      super()
-
-    cleanup: ()->
-      super()
-
-
-    toJson: (transform_to_value = false)->
-      val = @val()
-      for i, o in val
-        if o instanceof ops.Object
-          o.toJson(transform_to_value)
-        else if o instanceof ops.ListManager
-          o.toJson(transform_to_value)
-        else if transform_to_value and o instanceof ops.Operation
-          o.val()
-        else
-          o
-
-    #
-    # @private
-    # @see Operation.execute
-    #
-    execute: ()->
-      if @validateSavedOperations()
-        @beginning.setParent @
-        @end.setParent @
-        super
-      else
-        false
-
-    # Get the element previous to the delemiter at the end
-    getLastOperation: ()->
-      @end.prev_cl
-
-    # similar to the above
-    getFirstOperation: ()->
-      @beginning.next_cl
-
-    # Transforms the the list to an array
-    # Doesn't return left-right delimiter.
-    toArray: ()->
-      o = @beginning.next_cl
-      result = []
-      while o isnt @end
-        if not o.is_deleted
-          result.push o.val()
-        o = o.next_cl
-      result
-
-    map: (f)->
-      o = @beginning.next_cl
-      result = []
-      while o isnt @end
-        if not o.is_deleted
-          result.push f(o)
-        o = o.next_cl
-      result
-
-    fold: (init, f)->
-      o = @beginning.next_cl
-      while o isnt @end
-        if not o.is_deleted
-          init = f(init, o)
-        o = o.next_cl
-      init
-
-    val: (pos)->
-      if pos?
-        o = @getOperationByPosition(pos+1)
-        if not (o instanceof ops.Delimiter)
-          o.val()
-        else
-          throw new Error "this position does not exist"
-      else
-        @toArray()
-
-    ref: (pos)->
-      if pos?
-        o = @getOperationByPosition(pos+1)
-        if not (o instanceof ops.Delimiter)
-          o
-        else
-          null
-          # throw new Error "this position does not exist"
-      else
-        throw new Error "you must specify a position parameter"
-
-    #
-    # Retrieves the x-th not deleted element.
-    # e.g. "abc" : the 1th character is "a"
-    # the 0th character is the left Delimiter
-    #
-    getOperationByPosition: (position)->
-      o = @beginning
-      while true
-        # find the i-th op
-        if o instanceof ops.Delimiter and o.prev_cl?
-          # the user or you gave a position parameter that is to big
-          # for the current array. Therefore we reach a Delimiter.
-          # Then, we'll just return the last character.
-          o = o.prev_cl
-          while o.isDeleted() and o.prev_cl?
-            o = o.prev_cl
-          break
-        if position <= 0 and not o.isDeleted()
-          break
-
-        o = o.next_cl
-        if not o.isDeleted()
-          position -= 1
-      o
-
-    push: (content)->
-      @insertAfter @end.prev_cl, [content]
-
-    insertAfter: (left, contents)->
-      right = left.next_cl
-      while right.isDeleted()
-        right = right.next_cl # find the first character to the right, that is not deleted. In the case that position is 0, its the Delimiter.
-      left = right.prev_cl
-
-      # TODO: always expect an array as content. Then you can combine this with the other option (else)
-      if contents instanceof ops.Operation
-        (new ops.Insert null, content, null, undefined, undefined, left, right).execute()
-      else
-        for c in contents
-          if c? and c._name? and c._getModel?
-            c = c._getModel(@custom_types, @operations)
-          tmp = (new ops.Insert null, c, null, undefined, undefined, left, right).execute()
-          left = tmp
-      @
-
-    #
-    # Inserts an array of content into this list.
-    # @Note: This expects an array as content!
-    #
-    # @return {ListManager Type} This String object.
-    #
-    insert: (position, contents)->
-      ith = @getOperationByPosition position
-      # the (i-1)th character. e.g. "abc" the 1th character is "a"
-      # the 0th character is the left Delimiter
-      @insertAfter ith, contents
-
-    #
-    # Deletes a part of the word.
-    #
-    # @return {ListManager Type} This String object
-    #
-    delete: (position, length = 1)->
-      o = @getOperationByPosition(position+1) # position 0 in this case is the deletion of the first character
-
-      delete_ops = []
-      for i in [0...length]
-        if o instanceof ops.Delimiter
-          break
-        d = (new ops.Delete null, undefined, o).execute()
-        o = o.next_cl
-        while (not (o instanceof ops.Delimiter)) and o.isDeleted()
-          o = o.next_cl
-        delete_ops.push d._encode()
-      @
-
-
-    callOperationSpecificInsertEvents: (op)->
-      getContentType = (content)->
-        if content instanceof ops.Operation
-          content.getCustomType()
-        else
-          content
-      @callEvent [
-        type: "insert"
-        reference: op
-        position: op.getPosition()
-        object: @getCustomType()
-        changedBy: op.uid.creator
-        value: getContentType op.val()
-      ]
-
-    callOperationSpecificDeleteEvents: (op, del_op)->
-      @callEvent [
-        type: "delete"
-        reference: op
-        position: op.getPosition()
-        object: @getCustomType() # TODO: You can combine getPosition + getParent in a more efficient manner! (only left Delimiter will hold @parent)
-        length: 1
-        changedBy: del_op.uid.creator
-        oldValue: op.val()
-      ]
-
-  ops.ListManager.parse = (json)->
-    {
-      'uid' : uid
-      'custom_type': custom_type
-      'content' : content
-      'content_operations' : content_operations
-    } = json
-    new this(custom_type, uid, content, content_operations)
-
-  class ops.Composition extends ops.ListManager
-
-    constructor: (custom_type, @_composition_value, composition_value_operations, uid, tmp_composition_ref)->
-      # we can't use @seveOperation 'composition_ref', tmp_composition_ref here,
-      # because then there is a "loop" (insertion refers to parent, refers to insertion..)
-      # This is why we have to check in @callOperationSpecificInsertEvents until we find it
-      super custom_type, uid
-      if tmp_composition_ref?
-        @tmp_composition_ref = tmp_composition_ref
-      else
-        @composition_ref = @end.prev_cl
-      if composition_value_operations?
-        @composition_value_operations = {}
-        for n,o of composition_value_operations
-          @saveOperation n, o, '_composition_value'
-
-    type: "Composition"
-
-    #
-    # @private
-    # @see Operation.execute
-    #
-    execute: ()->
-      if @validateSavedOperations()
-        @getCustomType()._setCompositionValue @_composition_value
-        delete @_composition_value
-        # check if tmp_composition_ref already exists
-        if @tmp_composition_ref
-          composition_ref = @HB.getOperation @tmp_composition_ref
-          if composition_ref?
-            delete @tmp_composition_ref
-            @composition_ref = composition_ref
-        super
-      else
-        false
-
-    #
-    # This is called, when the Insert-operation was successfully executed.
-    #
-    callOperationSpecificInsertEvents: (op)->
-      if @tmp_composition_ref?
-        if op.uid.creator is @tmp_composition_ref.creator and op.uid.op_number is @tmp_composition_ref.op_number
-          @composition_ref = op
-          delete @tmp_composition_ref
-          op = op.next_cl
-          if op is @end
-            return
-        else
-          return
-
-      o = @end.prev_cl
-      while o isnt op
-        @getCustomType()._unapply o.undo_delta
-        o = o.prev_cl
-      while o isnt @end
-        o.undo_delta = @getCustomType()._apply o.val()
-        o = o.next_cl
-      @composition_ref = @end.prev_cl
-
-      @callEvent [
-        type: "update"
-        changedBy: op.uid.creator
-        newValue: @val()
-      ]
-
-    callOperationSpecificDeleteEvents: (op, del_op)->
-      return
-
-    #
-    # Create a new Delta
-    # - inserts new Content at the end of the list
-    # - updates the composition_value
-    # - updates the composition_ref
-    #
-    # @param delta The delta that is applied to the composition_value
-    #
-    applyDelta: (delta, operations)->
-      (new ops.Insert null, delta, operations, @, null, @end.prev_cl, @end).execute()
-      undefined
-
-    #
-    # Encode this operation in such a way that it can be parsed by remote peers.
-    #
-    _encode: (json = {})->
-      custom = @getCustomType()._getCompositionValue()
-      json.composition_value = custom.composition_value
-      if custom.composition_value_operations?
-        json.composition_value_operations = {}
-        for n,o of custom.composition_value_operations
-          json.composition_value_operations[n] = o.getUid()
-      if @composition_ref?
-        json.composition_ref = @composition_ref.getUid()
-      else
-        json.composition_ref = @tmp_composition_ref
-      super json
-
-  ops.Composition.parse = (json)->
-    {
-      'uid' : uid
-      'custom_type': custom_type
-      'composition_value' : composition_value
-      'composition_value_operations' : composition_value_operations
-      'composition_ref' : composition_ref
-    } = json
-    new this(custom_type, composition_value, composition_value_operations, uid, composition_ref)
-
-
-  #
-  # @nodoc
-  # Adds support for replace. The ReplaceManager manages Replaceable operations.
-  # Each Replaceable holds a value that is now replaceable.
-  #
-  # The TextType-type has implemented support for replace
-  # @see TextType
-  #
-  class ops.ReplaceManager extends ops.ListManager
-    #
-    # @param {Object} event_properties Decorates the event that is thrown by the RM
-    # @param {Object} event_this The object on which the event shall be executed
-    # @param {Operation} initial_content Initialize this with a Replaceable that holds the initial_content.
-    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
-    # @param {Delimiter} beginning Reference or Object.
-    # @param {Delimiter} end Reference or Object.
-    constructor: (custom_type, @event_properties, @event_this, uid)->
-      if not @event_properties['object']?
-        @event_properties['object'] = @event_this.getCustomType()
-      super custom_type, uid
-
-    type: "ReplaceManager"
-
-    #
-    # This doesn't throw the same events as the ListManager. Therefore, the
-    # Replaceables also not throw the same events.
-    # So, ReplaceManager and ListManager both implement
-    # these functions that are called when an Insertion is executed (at the end).
-    #
-    #
-    callEventDecorator: (events)->
-      if not @isDeleted()
-        for event in events
-          for name,prop of @event_properties
-            event[name] = prop
-        @event_this.callEvent events
-      undefined
-
-    #
-    # This is called, when the Insert-type was successfully executed.
-    # TODO: consider doing this in a more consistent manner. This could also be
-    # done with execute. But currently, there are no specital Insert-ops for ListManager.
-    #
-    callOperationSpecificInsertEvents: (op)->
-      if op.next_cl.type is "Delimiter" and op.prev_cl.type isnt "Delimiter"
-        # this replaces another Replaceable
-        if not op.is_deleted # When this is received from the HB, this could already be deleted!
-          old_value = op.prev_cl.val()
-          @callEventDecorator [
-            type: "update"
-            changedBy: op.uid.creator
-            oldValue: old_value
-          ]
-        op.prev_cl.applyDelete()
-      else if op.next_cl.type isnt "Delimiter"
-        # This won't be recognized by the user, because another
-        # concurrent operation is set as the current value of the RM
-        op.applyDelete()
-      else # prev _and_ next are Delimiters. This is the first created Replaceable in the RM
-        @callEventDecorator [
-          type: "add"
-          changedBy: op.uid.creator
-        ]
-      undefined
-
-    callOperationSpecificDeleteEvents: (op, del_op)->
-      if op.next_cl.type is "Delimiter"
-        @callEventDecorator [
-          type: "delete"
-          changedBy: del_op.uid.creator
-          oldValue: op.val()
-        ]
-
-
-    #
-    # Replace the existing word with a new word.
-    #
-    # @param content {Operation} The new value of this ReplaceManager.
-    # @param replaceable_uid {UID} Optional: Unique id of the Replaceable that is created
-    #
-    replace: (content, replaceable_uid)->
-      o = @getLastOperation()
-      relp = (new ops.Insert null, content, null, @, replaceable_uid, o, o.next_cl).execute()
-      # TODO: delete repl (for debugging)
-      undefined
-
-    isContentDeleted: ()->
-      @getLastOperation().isDeleted()
-
-    deleteContent: ()->
-      last_op = @getLastOperation()
-      if (not last_op.isDeleted()) and last_op.type isnt "Delimiter"
-        (new ops.Delete null, undefined, @getLastOperation().uid).execute()
-      undefined
-
-    #
-    # Get the value of this
-    # @return {String}
-    #
-    val: ()->
-      o = @getLastOperation()
-      #if o instanceof ops.Delimiter
-        # throw new Error "Replace Manager doesn't contain anything."
-      o.val?() # ? - for the case that (currently) the RM does not contain anything (then o is a Delimiter)
-
-
-
-  basic_ops

lib/y-object.coffee

@@ -1,55 +0,0 @@
-
-bindToChildren = (that)->
-  for i in [0...that.children.length]
-    attr = that.children.item(i)
-    if attr.name?
-      attr.val = that.val.val(attr.name)
-  that.val.observe (events)->
-    for event in events
-      if event.name?
-        for i in [0...that.children.length]
-          attr = that.children.item(i)
-          if attr.name? and attr.name is event.name
-            newVal = that.val.val(attr.name)
-            if attr.val isnt newVal
-              attr.val = newVal
-
-Polymer "y-object",
-  ready: ()->
-    if @connector?
-      @val = new Y @connector
-      bindToChildren @
-    else if @val?
-      bindToChildren @
-
-  valChanged: ()->
-    if @val? and @val._name is "Object"
-      bindToChildren @
-
-  connectorChanged: ()->
-    if (not @val?)
-      @val = new Y @connector
-      bindToChildren @
-
-Polymer "y-property",
-  ready: ()->
-    if @val? and @name?
-      if @val.constructor is Object
-        @val = @parentElement.val(@name,new Y.Object(@val)).val(@name)
-        # TODO: please use instanceof instead of ._name,
-        # since it is more safe (consider someone putting a custom Object type here)
-      else if typeof @val is "string"
-        @parentElement.val(@name,@val)
-      if @val._name is "Object"
-        bindToChildren @
-
-  valChanged: ()->
-    if @val? and @name?
-      if @val.constructor is Object
-        @val = @parentElement.val.val(@name, new Y.Object(@val)).val(@name)
-        # TODO: please use instanceof instead of ._name,
-        # since it is more safe (consider someone putting a custom Object type here)
-      else if @val._name is "Object"
-        bindToChildren @
-      else if @parentElement.val?.val? and @val isnt @parentElement.val.val(@name)
-        @parentElement.val.val @name, @val

lib/y.coffee

@@ -1,39 +0,0 @@
-
-structured_ops_uninitialized = require "./Operations/Structured"
-
-HistoryBuffer = require "./HistoryBuffer"
-Engine = require "./Engine"
-adaptConnector = require "./ConnectorAdapter"
-
-createY = (connector)->
-  user_id = null
-  if connector.user_id?
-    user_id = connector.user_id # TODO: change to getUniqueId()
-  else
-    user_id = "_temp"
-    connector.on_user_id_set = (id)->
-      user_id = id
-      HB.resetUserId id
-  HB = new HistoryBuffer user_id
-  ops_manager = structured_ops_uninitialized HB, this.constructor
-  ops = ops_manager.operations
-
-  engine = new Engine HB, ops
-  adaptConnector connector, engine, HB, ops_manager.execution_listener
-
-  ops.Operation.prototype.HB = HB
-  ops.Operation.prototype.operations = ops
-  ops.Operation.prototype.engine = engine
-  ops.Operation.prototype.connector = connector
-  ops.Operation.prototype.custom_types = this.constructor
-
-  ct = new createY.Object()
-  model = new ops.MapManager(ct, HB.getReservedUniqueIdentifier()).execute()
-  ct._setModel model
-  ct
-
-module.exports = createY
-if window?
-  window.Y = createY
-
-createY.Object = require "./ObjectType"

package.json

@@ -1,65 +1,66 @@
 {
   "name": "yjs",
-  "version": "0.5.1",
-  "description": "A Framework that enables Real-Time Collaboration on arbitrary data structures.",
-  "main": "./build/node/y.js",
+  "version": "13.0.0-4",
+  "description": "A framework for real-time p2p shared editing on any data",
+  "main": "./y.node.js",
+  "browser": "./y.js",
+  "module": "./src/y.js",
   "scripts": {
-    "prepublish": "./node_modules/gulp/bin/gulp.js build_node",
-    "test": "./node_modules/gulp/bin/gulp.js mocha"
+    "test": "npm run lint",
+    "lint": "standard",
+    "dist": "rollup -c rollup.browser.js; rollup -c rollup.node.js",
+    "postversion": "npm run dist",
+    "postpublish": "tag-dist-files --overwrite-existing-tag"
+  },
+  "files": [
+    "y.*"
+  ],
+  "standard": {
+    "ignore": [
+      "/y.js",
+      "/y.js.map"
+    ]
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/rwth-acis/yjs"
+    "url": "https://github.com/y-js/yjs.git"
   },
   "keywords": [
+    "Yjs",
     "OT",
-    "collaboration",
-    "synchronization",
+    "Collaboration",
+    "Synchronization",
     "ShareJS",
     "Coweb",
-    "concurrency"
+    "Concurrency"
   ],
   "author": "Kevin Jahns",
   "email": "kevin.jahns@rwth-aachen.de",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/rwth-acis/yjs/issues"
-  },
-  "homepage": "https://dadamonad.github.io/yjs/",
-  "dependencies": {
+    "url": "https://github.com/y-js/yjs/issues"
   },
+  "homepage": "http://y-js.org",
   "devDependencies": {
-    "chai": "^2.2.0",
-    "codo": "^2.0.9",
-    "coffee-errors": "~0.8.6",
-    "coffee-script": "^1.7.1",
-    "coffeeify": "^0.6.0",
-    "gulp": "^3.8.7",
-    "gulp-browserify": "^0.5.0",
-    "gulp-cached": "^1.0.1",
-    "gulp-coffee": "^2.1.1",
-    "gulp-coffeeify": "^0.1.2",
-    "gulp-coffeelint": "^0.3.3",
-    "gulp-concat": "^2.3.4",
-    "gulp-copy": "0.0.2",
-    "gulp-debug": "^1.0.0",
-    "gulp-exit": "0.0.2",
-    "gulp-git": "^0.5.0",
-    "gulp-if": "^1.2.4",
-    "gulp-ignore": "^1.2.0",
-    "gulp-ljs": "^0.1.1",
-    "gulp-mocha": "^0.5.2",
-    "gulp-plumber": "^0.6.6",
-    "gulp-rename": "^1.2.0",
-    "gulp-rimraf": "^0.1.0",
-    "gulp-run": "^1.6.3",
-    "gulp-sourcemaps": "^1.1.1",
-    "gulp-uglify": "^0.3.1",
-    "gulp-watch": "^3.0.0",
-    "jquery": "^2.1.1",
-    "underscore": "^1.6.0",
-    "mocha": "^2.1.0",
-    "sinon": "^1.12.2",
-    "sinon-chai": "^2.7.0"
+    "babel-cli": "^6.24.1",
+    "babel-plugin-external-helpers": "^6.22.0",
+    "babel-plugin-transform-regenerator": "^6.24.1",
+    "babel-plugin-transform-runtime": "^6.23.0",
+    "babel-preset-latest": "^6.24.1",
+    "chance": "^1.0.9",
+    "concurrently": "^3.4.0",
+    "rollup-plugin-babel": "^2.7.1",
+    "rollup-plugin-commonjs": "^8.0.2",
+    "rollup-plugin-inject": "^2.0.0",
+    "rollup-plugin-multi-entry": "^2.0.1",
+    "rollup-plugin-node-resolve": "^3.0.0",
+    "rollup-plugin-uglify": "^1.0.2",
+    "rollup-regenerator-runtime": "^6.23.1",
+    "rollup-watch": "^3.2.2",
+    "standard": "^10.0.2",
+    "tag-dist-files": "^0.1.6"
+  },
+  "dependencies": {
+    "debug": "^2.6.8"
   }
 }

rollup.browser.js

@@ -0,0 +1,47 @@
+import inject from 'rollup-plugin-inject'
+import babel from 'rollup-plugin-babel'
+import uglify from 'rollup-plugin-uglify'
+import nodeResolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+var pkg = require('./package.json')
+
+export default {
+  entry: 'src/y.js',
+  moduleName: 'Y',
+  format: 'umd',
+  plugins: [
+    nodeResolve({
+      main: true,
+      module: true,
+      browser: true
+    }),
+    commonjs(),
+    babel({
+      runtimeHelpers: true
+    }),
+    inject({
+      regeneratorRuntime: 'regenerator-runtime'
+    }),
+    uglify({
+      output: {
+        comments: function (node, comment) {
+          var text = comment.value
+          var type = comment.type
+          if (type === 'comment2') {
+            // multiline comment
+            return /@license/i.test(text)
+          }
+        }
+      }
+    })
+  ],
+  dest: 'y.js',
+  sourceMap: true,
+  banner: `
+/**
+ * ${pkg.name} - ${pkg.description}
+ * @version v${pkg.version}
+ * @license ${pkg.license}
+ */
+`
+}

rollup.node.js

@@ -0,0 +1,26 @@
+import nodeResolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+var pkg = require('./package.json')
+
+export default {
+  entry: 'src/y.js',
+  moduleName: 'Y',
+  format: 'umd',
+  plugins: [
+    nodeResolve({
+      main: true,
+      module: true,
+      browser: true
+    }),
+    commonjs()
+  ],
+  dest: 'y.node.js',
+  sourceMap: true,
+  banner: `
+/**
+ * ${pkg.name} - ${pkg.description}
+ * @version v${pkg.version}
+ * @license ${pkg.license}
+ */
+`
+}

rollup.test.js

@@ -0,0 +1,20 @@
+import nodeResolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import multiEntry from 'rollup-plugin-multi-entry'
+
+export default {
+  entry: 'tests/*.js',
+  moduleName: 'y-array-tests',
+  format: 'umd',
+  plugins: [
+    nodeResolve({
+      main: true,
+      module: true,
+      browser: true
+    }),
+    commonjs(),
+    multiEntry()
+  ],
+  dest: 'y-array.test.js',
+  sourceMap: true
+}

src/Connector.js

@@ -0,0 +1,493 @@
+/* @flow */
+'use strict'
+
+function canRead (auth) { return auth === 'read' || auth === 'write' }
+function canWrite (auth) { return auth === 'write' }
+
+export default function extendConnector (Y/* :any */) {
+  class AbstractConnector {
+    /* ::
+    y: YConfig;
+    role: SyncRole;
+    connections: Object;
+    isSynced: boolean;
+    userEventListeners: Array<Function>;
+    whenSyncedListeners: Array<Function>;
+    currentSyncTarget: ?UserId;
+    syncingClients: Array<UserId>;
+    forwardToSyncingClients: boolean;
+    debug: boolean;
+    syncStep2: Promise;
+    userId: UserId;
+    send: Function;
+    broadcast: Function;
+    broadcastOpBuffer: Array<Operation>;
+    protocolVersion: number;
+    */
+    /*
+      opts contains the following information:
+       role : String Role of this client ("master" or "slave")
+       userId : String Uniquely defines the user.
+       debug: Boolean Whether to print debug messages (optional)
+    */
+    constructor (y, opts) {
+      this.y = y
+      if (opts == null) {
+        opts = {}
+      }
+      // Prefer to receive untransformed operations. This does only work if
+      // this client receives operations from only one other client.
+      // In particular, this does not work with y-webrtc.
+      // It will work with y-websockets-client
+      this.preferUntransformed = opts.preferUntransformed || false
+      if (opts.role == null || opts.role === 'master') {
+        this.role = 'master'
+      } else if (opts.role === 'slave') {
+        this.role = 'slave'
+      } else {
+        throw new Error("Role must be either 'master' or 'slave'!")
+      }
+      this.log = Y.debug('y:connector')
+      this.logMessage = Y.debug('y:connector-message')
+      this.y.db.forwardAppliedOperations = opts.forwardAppliedOperations || false
+      this.role = opts.role
+      this.connections = {}
+      this.isSynced = false
+      this.userEventListeners = []
+      this.whenSyncedListeners = []
+      this.currentSyncTarget = null
+      this.syncingClients = []
+      this.forwardToSyncingClients = opts.forwardToSyncingClients !== false
+      this.debug = opts.debug === true
+      this.broadcastOpBuffer = []
+      this.protocolVersion = 11
+      this.authInfo = opts.auth || null
+      this.checkAuth = opts.checkAuth || function () { return Promise.resolve('write') } // default is everyone has write access
+      if (opts.generateUserId !== false) {
+        this.setUserId(Y.utils.generateGuid())
+      }
+    }
+    resetAuth (auth) {
+      if (this.authInfo !== auth) {
+        this.authInfo = auth
+        this.broadcast({
+          type: 'auth',
+          auth: this.authInfo
+        })
+      }
+    }
+    reconnect () {
+      this.log('reconnecting..')
+      return this.y.db.startGarbageCollector()
+    }
+    disconnect () {
+      this.log('discronnecting..')
+      this.connections = {}
+      this.isSynced = false
+      this.currentSyncTarget = null
+      this.syncingClients = []
+      this.whenSyncedListeners = []
+      this.y.db.stopGarbageCollector()
+      return this.y.db.whenTransactionsFinished()
+    }
+    repair () {
+      this.log('Repairing the state of Yjs. This can happen if messages get lost, and Yjs detects that something is wrong. If this happens often, please report an issue here: https://github.com/y-js/yjs/issues')
+      for (var name in this.connections) {
+        this.connections[name].isSynced = false
+      }
+      this.isSynced = false
+      this.currentSyncTarget = null
+      this.findNextSyncTarget()
+    }
+    setUserId (userId) {
+      if (this.userId == null) {
+        this.log('Set userId to "%s"', userId)
+        this.userId = userId
+        return this.y.db.setUserId(userId)
+      } else {
+        return null
+      }
+    }
+    onUserEvent (f) {
+      this.userEventListeners.push(f)
+    }
+    removeUserEventListener (f) {
+      this.userEventListeners = this.userEventListeners.filter(g => f !== g)
+    }
+    userLeft (user) {
+      if (this.connections[user] != null) {
+        this.log('User left: %s', user)
+        delete this.connections[user]
+        if (user === this.currentSyncTarget) {
+          this.currentSyncTarget = null
+          this.findNextSyncTarget()
+        }
+        this.syncingClients = this.syncingClients.filter(function (cli) {
+          return cli !== user
+        })
+        for (var f of this.userEventListeners) {
+          f({
+            action: 'userLeft',
+            user: user
+          })
+        }
+      }
+    }
+    userJoined (user, role) {
+      if (role == null) {
+        throw new Error('You must specify the role of the joined user!')
+      }
+      if (this.connections[user] != null) {
+        throw new Error('This user already joined!')
+      }
+      this.log('User joined: %s', user)
+      this.connections[user] = {
+        isSynced: false,
+        role: role
+      }
+      let defer = {}
+      defer.promise = new Promise(function (resolve) { defer.resolve = resolve })
+      this.connections[user].syncStep2 = defer
+      for (var f of this.userEventListeners) {
+        f({
+          action: 'userJoined',
+          user: user,
+          role: role
+        })
+      }
+      if (this.currentSyncTarget == null) {
+        this.findNextSyncTarget()
+      }
+    }
+    // Execute a function _when_ we are connected.
+    // If not connected, wait until connected
+    whenSynced (f) {
+      if (this.isSynced) {
+        f()
+      } else {
+        this.whenSyncedListeners.push(f)
+      }
+    }
+    findNextSyncTarget () {
+      if (this.currentSyncTarget != null) {
+        return // "The current sync has not finished!"
+      }
+
+      var syncUser = null
+      for (var uid in this.connections) {
+        if (!this.connections[uid].isSynced) {
+          syncUser = uid
+          break
+        }
+      }
+      var conn = this
+      if (syncUser != null) {
+        this.currentSyncTarget = syncUser
+        this.y.db.requestTransaction(function * () {
+          var stateSet = yield * this.getStateSet()
+          // var deleteSet = yield * this.getDeleteSet()
+          var answer = {
+            type: 'sync step 1',
+            stateSet: stateSet,
+            // deleteSet: deleteSet,
+            protocolVersion: conn.protocolVersion,
+            auth: conn.authInfo
+          }
+          if (conn.preferUntransformed && Object.keys(stateSet).length === 0) {
+            answer.preferUntransformed = true
+          }
+          conn.send(syncUser, answer)
+        })
+      } else {
+        if (!conn.isSynced) {
+          this.y.db.requestTransaction(function * () {
+            if (!conn.isSynced) {
+              // it is crucial that isSynced is set at the time garbageCollectAfterSync is called
+              conn.isSynced = true
+              // It is safer to remove this!
+              // TODO: remove: yield * this.garbageCollectAfterSync()
+              // call whensynced listeners
+              for (var f of conn.whenSyncedListeners) {
+                f()
+              }
+              conn.whenSyncedListeners = []
+            }
+          })
+        }
+      }
+    }
+    send (uid, message) {
+      this.log('Send \'%s\' to %s', message.type, uid)
+      this.logMessage('Message: %j', message)
+    }
+    broadcast (message) {
+      this.log('Broadcast \'%s\'', message.type)
+      this.logMessage('Message: %j', message)
+    }
+    /*
+      Buffer operations, and broadcast them when ready.
+    */
+    broadcastOps (ops) {
+      ops = ops.map(function (op) {
+        return Y.Struct[op.struct].encode(op)
+      })
+      var self = this
+      function broadcastOperations () {
+        if (self.broadcastOpBuffer.length > 0) {
+          self.broadcast({
+            type: 'update',
+            ops: self.broadcastOpBuffer
+          })
+          self.broadcastOpBuffer = []
+        }
+      }
+      if (this.broadcastOpBuffer.length === 0) {
+        this.broadcastOpBuffer = ops
+        this.y.db.whenTransactionsFinished().then(broadcastOperations)
+      } else {
+        this.broadcastOpBuffer = this.broadcastOpBuffer.concat(ops)
+      }
+    }
+    /*
+      You received a raw message, and you know that it is intended for Yjs. Then call this function.
+    */
+    receiveMessage (sender/* :UserId */, message/* :Message */) {
+      if (sender === this.userId) {
+        return Promise.resolve()
+      }
+      this.log('Receive \'%s\' from %s', message.type, sender)
+      this.logMessage('Message: %j', message)
+      if (message.protocolVersion != null && message.protocolVersion !== this.protocolVersion) {
+        this.log(
+          `You tried to sync with a yjs instance that has a different protocol version
+          (You: ${this.protocolVersion}, Client: ${message.protocolVersion}).
+          The sync was stopped. You need to upgrade your dependencies (especially Yjs & the Connector)!
+          `)
+        this.send(sender, {
+          type: 'sync stop',
+          protocolVersion: this.protocolVersion
+        })
+        return Promise.reject(new Error('Incompatible protocol version'))
+      }
+      if (message.auth != null && this.connections[sender] != null) {
+        // authenticate using auth in message
+        var auth = this.checkAuth(message.auth, this.y)
+        this.connections[sender].auth = auth
+        auth.then(auth => {
+          for (var f of this.userEventListeners) {
+            f({
+              action: 'userAuthenticated',
+              user: sender,
+              auth: auth
+            })
+          }
+        })
+      } else if (this.connections[sender] != null && this.connections[sender].auth == null) {
+        // authenticate without otherwise
+        this.connections[sender].auth = this.checkAuth(null, this.y)
+      }
+      if (this.connections[sender] != null && this.connections[sender].auth != null) {
+        return this.connections[sender].auth.then((auth) => {
+          if (message.type === 'sync step 1' && canRead(auth)) {
+            let conn = this
+            let m = message
+            let wait // wait for sync step 2 to complete
+            if (this.role === 'slave') {
+              wait = Promise.all(Object.keys(this.connections)
+                .map(uid => this.connections[uid])
+                .filter(conn => conn.role === 'master')
+                .map(conn => conn.syncStep2.promise)
+              )
+            } else {
+              wait = Promise.resolve()
+            }
+            wait.then(() => {
+              this.y.db.requestTransaction(function * () {
+                var currentStateSet = yield * this.getStateSet()
+                // TODO: remove
+                // if (canWrite(auth)) {
+                //  yield * this.applyDeleteSet(m.deleteSet)
+                // }
+
+                var ds = yield * this.getDeleteSet()
+                var answer = {
+                  type: 'sync step 2',
+                  stateSet: currentStateSet,
+                  deleteSet: ds,
+                  protocolVersion: this.protocolVersion,
+                  auth: this.authInfo
+                }
+                if (message.preferUntransformed === true && Object.keys(m.stateSet).length === 0) {
+                  answer.osUntransformed = yield * this.getOperationsUntransformed()
+                } else {
+                  answer.os = yield * this.getOperations(m.stateSet)
+                }
+                conn.send(sender, answer)
+                if (this.forwardToSyncingClients) {
+                  conn.syncingClients.push(sender)
+                  setTimeout(function () {
+                    conn.syncingClients = conn.syncingClients.filter(function (cli) {
+                      return cli !== sender
+                    })
+                    conn.send(sender, {
+                      type: 'sync done'
+                    })
+                  }, 5000) // TODO: conn.syncingClientDuration)
+                } else {
+                  conn.send(sender, {
+                    type: 'sync done'
+                  })
+                }
+              })
+            })
+          } else if (message.type === 'sync step 2' && canWrite(auth)) {
+            var db = this.y.db
+            let defer = this.connections[sender].syncStep2
+            let m = message
+            // apply operations first
+            db.requestTransaction(function * () {
+              // yield * this.applyDeleteSet(m.deleteSet)
+              if (m.osUntransformed != null) {
+                yield * this.applyOperationsUntransformed(m.osUntransformed, m.stateSet)
+              } else {
+                this.store.apply(m.os)
+              }
+              // defer.resolve()
+            })
+            // then apply ds
+            db.whenTransactionsFinished().then(() => {
+              db.requestTransaction(function * () {
+                yield * this.applyDeleteSet(m.deleteSet)
+              })
+              defer.resolve()
+            })
+            return defer.promise
+          } else if (message.type === 'sync done') {
+            var self = this
+            this.connections[sender].syncStep2.promise.then(function () {
+              self._setSyncedWith(sender)
+            })
+          } else if (message.type === 'update' && canWrite(auth)) {
+            if (this.forwardToSyncingClients) {
+              for (var client of this.syncingClients) {
+                this.send(client, message)
+              }
+            }
+            if (this.y.db.forwardAppliedOperations) {
+              var delops = message.ops.filter(function (o) {
+                return o.struct === 'Delete'
+              })
+              if (delops.length > 0) {
+                this.broadcastOps(delops)
+              }
+            }
+            this.y.db.apply(message.ops)
+          }
+        })
+      } else {
+        return Promise.reject(new Error('Unable to deliver message'))
+      }
+    }
+    _setSyncedWith (user) {
+      var conn = this.connections[user]
+      if (conn != null) {
+        conn.isSynced = true
+      }
+      if (user === this.currentSyncTarget) {
+        this.currentSyncTarget = null
+        this.findNextSyncTarget()
+      }
+    }
+    /*
+      Currently, the HB encodes operations as JSON. For the moment I want to keep it
+      that way. Maybe we support encoding in the HB as XML in the future, but for now I don't want
+      too much overhead. Y is very likely to get changed a lot in the future
+
+      Because we don't want to encode JSON as string (with character escaping, wich makes it pretty much unreadable)
+      we encode the JSON as XML.
+
+      When the HB support encoding as XML, the format should look pretty much like this.
+
+      does not support primitive values as array elements
+      expects an ltx (less than xml) object
+    */
+    parseMessageFromXml (m/* :any */) {
+      function parseArray (node) {
+        for (var n of node.children) {
+          if (n.getAttribute('isArray') === 'true') {
+            return parseArray(n)
+          } else {
+            return parseObject(n)
+          }
+        }
+      }
+      function parseObject (node/* :any */) {
+        var json = {}
+        for (var attrName in node.attrs) {
+          var value = node.attrs[attrName]
+          var int = parseInt(value, 10)
+          if (isNaN(int) || ('' + int) !== value) {
+            json[attrName] = value
+          } else {
+            json[attrName] = int
+          }
+        }
+        for (var n/* :any */ in node.children) {
+          var name = n.name
+          if (n.getAttribute('isArray') === 'true') {
+            json[name] = parseArray(n)
+          } else {
+            json[name] = parseObject(n)
+          }
+        }
+        return json
+      }
+      parseObject(m)
+    }
+    /*
+      encode message in xml
+      we use string because Strophe only accepts an "xml-string"..
+      So {a:4,b:{c:5}} will look like
+      <y a="4">
+        <b c="5"></b>
+      </y>
+      m - ltx element
+      json - Object
+    */
+    encodeMessageToXml (msg, obj) {
+      // attributes is optional
+      function encodeObject (m, json) {
+        for (var name in json) {
+          var value = json[name]
+          if (name == null) {
+            // nop
+          } else if (value.constructor === Object) {
+            encodeObject(m.c(name), value)
+          } else if (value.constructor === Array) {
+            encodeArray(m.c(name), value)
+          } else {
+            m.setAttribute(name, value)
+          }
+        }
+      }
+      function encodeArray (m, array) {
+        m.setAttribute('isArray', 'true')
+        for (var e of array) {
+          if (e.constructor === Object) {
+            encodeObject(m.c('array-element'), e)
+          } else {
+            encodeArray(m.c('array-element'), e)
+          }
+        }
+      }
+      if (obj.constructor === Object) {
+        encodeObject(msg.c('y', { xmlns: 'http://y.ninja/connector-stanza' }), obj)
+      } else if (obj.constructor === Array) {
+        encodeArray(msg.c('y', { xmlns: 'http://y.ninja/connector-stanza' }), obj)
+      } else {
+        throw new Error("I can't encode this json!")
+      }
+    }
+  }
+  Y.AbstractConnector = AbstractConnector
+}

src/Connectors/Test.js

@@ -0,0 +1,178 @@
+/* global getRandom, async */
+'use strict'
+
+module.exports = function (Y) {
+  var globalRoom = {
+    users: {},
+    buffers: {},
+    removeUser: function (user) {
+      for (var i in this.users) {
+        this.users[i].userLeft(user)
+      }
+      delete this.users[user]
+      delete this.buffers[user]
+    },
+    addUser: function (connector) {
+      this.users[connector.userId] = connector
+      this.buffers[connector.userId] = {}
+      for (var uname in this.users) {
+        if (uname !== connector.userId) {
+          var u = this.users[uname]
+          u.userJoined(connector.userId, 'master')
+          connector.userJoined(u.userId, 'master')
+        }
+      }
+    },
+    whenTransactionsFinished: function () {
+      var self = this
+      return new Promise(function (resolve, reject) {
+        // The connector first has to send the messages to the db.
+        // Wait for the checkAuth-function to resolve
+        // The test lib only has a simple checkAuth function: `() => Promise.resolve()`
+        // Just add a function to the event-queue, in order to wait for the event.
+        // TODO: this may be buggy in test applications (but it isn't be for real-life apps)
+        setTimeout(function () {
+          var ps = []
+          for (var name in self.users) {
+            ps.push(self.users[name].y.db.whenTransactionsFinished())
+          }
+          Promise.all(ps).then(resolve, reject)
+        }, 10)
+      })
+    },
+    flushOne: function flushOne () {
+      var bufs = []
+      for (var receiver in globalRoom.buffers) {
+        let buff = globalRoom.buffers[receiver]
+        var push = false
+        for (let sender in buff) {
+          if (buff[sender].length > 0) {
+            push = true
+            break
+          }
+        }
+        if (push) {
+          bufs.push(receiver)
+        }
+      }
+      if (bufs.length > 0) {
+        var userId = getRandom(bufs)
+        let buff = globalRoom.buffers[userId]
+        let sender = getRandom(Object.keys(buff))
+        var m = buff[sender].shift()
+        if (buff[sender].length === 0) {
+          delete buff[sender]
+        }
+        var user = globalRoom.users[userId]
+        return user.receiveMessage(m[0], m[1]).then(function () {
+          return user.y.db.whenTransactionsFinished()
+        }, function () {})
+      } else {
+        return false
+      }
+    },
+    flushAll: function () {
+      return new Promise(function (resolve) {
+        // flushes may result in more created operations,
+        // flush until there is nothing more to flush
+        function nextFlush () {
+          var c = globalRoom.flushOne()
+          if (c) {
+            while (c) {
+              c = globalRoom.flushOne()
+            }
+            globalRoom.whenTransactionsFinished().then(nextFlush)
+          } else {
+            c = globalRoom.flushOne()
+            if (c) {
+              c.then(function () {
+                globalRoom.whenTransactionsFinished().then(nextFlush)
+              })
+            } else {
+              resolve()
+            }
+          }
+        }
+        globalRoom.whenTransactionsFinished().then(nextFlush)
+      })
+    }
+  }
+  Y.utils.globalRoom = globalRoom
+
+  var userIdCounter = 0
+
+  class Test extends Y.AbstractConnector {
+    constructor (y, options) {
+      if (options === undefined) {
+        throw new Error('Options must not be undefined!')
+      }
+      options.role = 'master'
+      options.forwardToSyncingClients = false
+      super(y, options)
+      this.setUserId((userIdCounter++) + '').then(() => {
+        globalRoom.addUser(this)
+      })
+      this.globalRoom = globalRoom
+      this.syncingClientDuration = 0
+    }
+    receiveMessage (sender, m) {
+      return super.receiveMessage(sender, JSON.parse(JSON.stringify(m)))
+    }
+    send (userId, message) {
+      var buffer = globalRoom.buffers[userId]
+      if (buffer != null) {
+        if (buffer[this.userId] == null) {
+          buffer[this.userId] = []
+        }
+        buffer[this.userId].push(JSON.parse(JSON.stringify([this.userId, message])))
+      }
+    }
+    broadcast (message) {
+      for (var key in globalRoom.buffers) {
+        var buff = globalRoom.buffers[key]
+        if (buff[this.userId] == null) {
+          buff[this.userId] = []
+        }
+        buff[this.userId].push(JSON.parse(JSON.stringify([this.userId, message])))
+      }
+    }
+    isDisconnected () {
+      return globalRoom.users[this.userId] == null
+    }
+    reconnect () {
+      if (this.isDisconnected()) {
+        globalRoom.addUser(this)
+        super.reconnect()
+      }
+      return Y.utils.globalRoom.flushAll()
+    }
+    disconnect () {
+      var waitForMe = Promise.resolve()
+      if (!this.isDisconnected()) {
+        globalRoom.removeUser(this.userId)
+        waitForMe = super.disconnect()
+      }
+      var self = this
+      return waitForMe.then(function () {
+        return self.y.db.whenTransactionsFinished()
+      })
+    }
+    flush () {
+      var self = this
+      return async(function * () {
+        var buff = globalRoom.buffers[self.userId]
+        while (Object.keys(buff).length > 0) {
+          var sender = getRandom(Object.keys(buff))
+          var m = buff[sender].shift()
+          if (buff[sender].length === 0) {
+            delete buff[sender]
+          }
+          yield this.receiveMessage(m[0], m[1])
+        }
+        yield self.whenTransactionsFinished()
+      })
+    }
+  }
+
+  Y.Test = Test
+}

src/Database.js

@@ -0,0 +1,605 @@
+/* @flow */
+'use strict'
+
+export default function extendDatabase (Y /* :any */) {
+  /*
+    Partial definition of an OperationStore.
+    TODO: name it Database, operation store only holds operations.
+
+    A database definition must alse define the following methods:
+    * logTable() (optional)
+      - show relevant information information in a table
+    * requestTransaction(makeGen)
+      - request a transaction
+    * destroy()
+      - destroy the database
+  */
+  class AbstractDatabase {
+    /* ::
+    y: YConfig;
+    forwardAppliedOperations: boolean;
+    listenersById: Object;
+    listenersByIdExecuteNow: Array<Object>;
+    listenersByIdRequestPending: boolean;
+    initializedTypes: Object;
+    whenUserIdSetListener: ?Function;
+    waitingTransactions: Array<Transaction>;
+    transactionInProgress: boolean;
+    executeOrder: Array<Object>;
+    gc1: Array<Struct>;
+    gc2: Array<Struct>;
+    gcTimeout: number;
+    gcInterval: any;
+    garbageCollect: Function;
+    executeOrder: Array<any>; // for debugging only
+    userId: UserId;
+    opClock: number;
+    transactionsFinished: ?{promise: Promise, resolve: any};
+    transact: (x: ?Generator) => any;
+    */
+    constructor (y, opts) {
+      this.y = y
+      opts.gc = opts.gc === true
+      this.dbOpts = opts
+      var os = this
+      this.userId = null
+      var resolve_
+      this.userIdPromise = new Promise(function (resolve) {
+        resolve_ = resolve
+      })
+      this.userIdPromise.resolve = resolve_
+      // whether to broadcast all applied operations (insert & delete hook)
+      this.forwardAppliedOperations = false
+      // E.g. this.listenersById[id] : Array<Listener>
+      this.listenersById = {}
+      // Execute the next time a transaction is requested
+      this.listenersByIdExecuteNow = []
+      // A transaction is requested
+      this.listenersByIdRequestPending = false
+      /* To make things more clear, the following naming conventions:
+         * ls : we put this.listenersById on ls
+         * l : Array<Listener>
+         * id : Id (can't use as property name)
+         * sid : String (converted from id via JSON.stringify
+                         so we can use it as a property name)
+
+        Always remember to first overwrite
+        a property before you iterate over it!
+      */
+      // TODO: Use ES7 Weak Maps. This way types that are no longer user,
+      // wont be kept in memory.
+      this.initializedTypes = {}
+      this.waitingTransactions = []
+      this.transactionInProgress = false
+      this.transactionIsFlushed = false
+      if (typeof YConcurrencyTestingMode !== 'undefined') {
+        this.executeOrder = []
+      }
+      this.gc1 = [] // first stage
+      this.gc2 = [] // second stage -> after that, remove the op
+
+      function garbageCollect () {
+        return os.whenTransactionsFinished().then(function () {
+          if (os.gcTimeout > 0 && (os.gc1.length > 0 || os.gc2.length > 0)) {
+            if (!os.y.connector.isSynced) {
+              console.warn('gc should be empty when not synced!')
+            }
+            return new Promise((resolve) => {
+              os.requestTransaction(function * () {
+                if (os.y.connector != null && os.y.connector.isSynced) {
+                  for (var i = 0; i < os.gc2.length; i++) {
+                    var oid = os.gc2[i]
+                    yield * this.garbageCollectOperation(oid)
+                  }
+                  os.gc2 = os.gc1
+                  os.gc1 = []
+                }
+                // TODO: Use setInterval here instead (when garbageCollect is called several times there will be several timeouts..)
+                if (os.gcTimeout > 0) {
+                  os.gcInterval = setTimeout(garbageCollect, os.gcTimeout)
+                }
+                resolve()
+              })
+            })
+          } else {
+            // TODO: see above
+            if (os.gcTimeout > 0) {
+              os.gcInterval = setTimeout(garbageCollect, os.gcTimeout)
+            }
+            return Promise.resolve()
+          }
+        })
+      }
+      this.garbageCollect = garbageCollect
+      this.startGarbageCollector()
+
+      this.repairCheckInterval = !opts.repairCheckInterval ? 6000 : opts.repairCheckInterval
+      this.opsReceivedTimestamp = new Date()
+      this.startRepairCheck()
+    }
+    startGarbageCollector () {
+      this.gc = this.dbOpts.gc
+      if (this.gc) {
+        this.gcTimeout = !this.dbOpts.gcTimeout ? 100000 : this.dbOpts.gcTimeout
+      } else {
+        this.gcTimeout = -1
+      }
+      if (this.gcTimeout > 0) {
+        this.garbageCollect()
+      }
+    }
+    startRepairCheck () {
+      var os = this
+      if (this.repairCheckInterval > 0) {
+        this.repairCheckIntervalHandler = setInterval(function repairOnMissingOperations () {
+          /*
+            Case 1. No ops have been received in a while (new Date() - os.opsReceivedTimestamp > os.repairCheckInterval)
+              - 1.1 os.listenersById is empty. Then the state was correct the whole time. -> Nothing to do (nor to update)
+              - 1.2 os.listenersById is not empty.
+                      * Then the state was incorrect for at least {os.repairCheckInterval} seconds.
+                      * -> Remove everything in os.listenersById and sync again (connector.repair())
+            Case 2. An op has been received in the last {os.repairCheckInterval } seconds.
+                    It is not yet necessary to check for faulty behavior. Everything can still resolve itself. Wait for more messages.
+                    If nothing was received for a while and os.listenersById is still not emty, we are in case 1.2
+                    -> Do nothing
+
+            Baseline here is: we really only have to catch case 1.2..
+          */
+          if (
+            new Date() - os.opsReceivedTimestamp > os.repairCheckInterval &&
+            Object.keys(os.listenersById).length > 0 // os.listenersById is not empty
+          ) {
+            // haven't received operations for over {os.repairCheckInterval} seconds, resend state vector
+            os.listenersById = {}
+            os.opsReceivedTimestamp = new Date() // update so you don't send repair several times in a row
+            os.y.connector.repair()
+          }
+        }, this.repairCheckInterval)
+      }
+    }
+    stopRepairCheck () {
+      clearInterval(this.repairCheckIntervalHandler)
+    }
+    queueGarbageCollector (id) {
+      if (this.y.connector.isSynced && this.gc) {
+        this.gc1.push(id)
+      }
+    }
+    emptyGarbageCollector () {
+      return new Promise(resolve => {
+        var check = () => {
+          if (this.gc1.length > 0 || this.gc2.length > 0) {
+            this.garbageCollect().then(check)
+          } else {
+            resolve()
+          }
+        }
+        setTimeout(check, 0)
+      })
+    }
+    addToDebug () {
+      if (typeof YConcurrencyTestingMode !== 'undefined') {
+        var command /* :string */ = Array.prototype.map.call(arguments, function (s) {
+          if (typeof s === 'string') {
+            return s
+          } else {
+            return JSON.stringify(s)
+          }
+        }).join('').replace(/"/g, "'").replace(/,/g, ', ').replace(/:/g, ': ')
+        this.executeOrder.push(command)
+      }
+    }
+    getDebugData () {
+      console.log(this.executeOrder.join('\n'))
+    }
+    stopGarbageCollector () {
+      var self = this
+      this.gc = false
+      this.gcTimeout = -1
+      return new Promise(function (resolve) {
+        self.requestTransaction(function * () {
+          var ungc /* :Array<Struct> */ = self.gc1.concat(self.gc2)
+          self.gc1 = []
+          self.gc2 = []
+          for (var i = 0; i < ungc.length; i++) {
+            var op = yield * this.getOperation(ungc[i])
+            if (op != null) {
+              delete op.gc
+              yield * this.setOperation(op)
+            }
+          }
+          resolve()
+        })
+      })
+    }
+    /*
+      Try to add to GC.
+
+      TODO: rename this function
+
+      Rulez:
+      * Only gc if this user is online & gc turned on
+      * The most left element in a list must not be gc'd.
+        => There is at least one element in the list
+
+      returns true iff op was added to GC
+    */
+    * addToGarbageCollector (op, left) {
+      if (
+        op.gc == null &&
+        op.deleted === true &&
+        this.store.gc &&
+        this.store.y.connector.isSynced
+      ) {
+        var gc = false
+        if (left != null && left.deleted === true) {
+          gc = true
+        } else if (op.content != null && op.content.length > 1) {
+          op = yield * this.getInsertionCleanStart([op.id[0], op.id[1] + 1])
+          gc = true
+        }
+        if (gc) {
+          op.gc = true
+          yield * this.setOperation(op)
+          this.store.queueGarbageCollector(op.id)
+          return true
+        }
+      }
+      return false
+    }
+    removeFromGarbageCollector (op) {
+      function filter (o) {
+        return !Y.utils.compareIds(o, op.id)
+      }
+      this.gc1 = this.gc1.filter(filter)
+      this.gc2 = this.gc2.filter(filter)
+      delete op.gc
+    }
+    destroyTypes () {
+      for (var key in this.initializedTypes) {
+        var type = this.initializedTypes[key]
+        if (type._destroy != null) {
+          type._destroy()
+        } else {
+          console.error('The type you included does not provide destroy functionality, it will remain in memory (updating your packages will help).')
+        }
+      }
+    }
+    * destroy () {
+      clearTimeout(this.gcInterval)
+      this.gcInterval = null
+      this.stopRepairCheck()
+    }
+    setUserId (userId) {
+      if (!this.userIdPromise.inProgress) {
+        this.userIdPromise.inProgress = true
+        var self = this
+        self.requestTransaction(function * () {
+          self.userId = userId
+          var state = yield * this.getState(userId)
+          self.opClock = state.clock
+          self.userIdPromise.resolve(userId)
+        })
+      }
+      return this.userIdPromise
+    }
+    whenUserIdSet (f) {
+      this.userIdPromise.then(f)
+    }
+    getNextOpId (numberOfIds) {
+      if (numberOfIds == null) {
+        throw new Error('getNextOpId expects the number of created ids to create!')
+      } else if (this.userId == null) {
+        throw new Error('OperationStore not yet initialized!')
+      } else {
+        var id = [this.userId, this.opClock]
+        this.opClock += numberOfIds
+        return id
+      }
+    }
+    /*
+      Apply a list of operations.
+
+      * we save a timestamp, because we received new operations that could resolve ops in this.listenersById (see this.startRepairCheck)
+      * get a transaction
+      * check whether all Struct.*.requiredOps are in the OS
+      * check if it is an expected op (otherwise wait for it)
+      * check if was deleted, apply a delete operation after op was applied
+    */
+    apply (ops) {
+      this.opsReceivedTimestamp = new Date()
+      for (var i = 0; i < ops.length; i++) {
+        var o = ops[i]
+        if (o.id == null || o.id[0] !== this.y.connector.userId) {
+          var required = Y.Struct[o.struct].requiredOps(o)
+          if (o.requires != null) {
+            required = required.concat(o.requires)
+          }
+          this.whenOperationsExist(required, o)
+        }
+      }
+    }
+    /*
+      op is executed as soon as every operation requested is available.
+      Note that Transaction can (and should) buffer requests.
+    */
+    whenOperationsExist (ids, op) {
+      if (ids.length > 0) {
+        let listener = {
+          op: op,
+          missing: ids.length
+        }
+
+        for (let i = 0; i < ids.length; i++) {
+          let id = ids[i]
+          let sid = JSON.stringify(id)
+          let l = this.listenersById[sid]
+          if (l == null) {
+            l = []
+            this.listenersById[sid] = l
+          }
+          l.push(listener)
+        }
+      } else {
+        this.listenersByIdExecuteNow.push({
+          op: op
+        })
+      }
+
+      if (this.listenersByIdRequestPending) {
+        return
+      }
+
+      this.listenersByIdRequestPending = true
+      var store = this
+
+      this.requestTransaction(function * () {
+        var exeNow = store.listenersByIdExecuteNow
+        store.listenersByIdExecuteNow = []
+
+        var ls = store.listenersById
+        store.listenersById = {}
+
+        store.listenersByIdRequestPending = false
+
+        for (let key = 0; key < exeNow.length; key++) {
+          let o = exeNow[key].op
+          yield * store.tryExecute.call(this, o)
+        }
+
+        for (var sid in ls) {
+          var l = ls[sid]
+          var id = JSON.parse(sid)
+          var op
+          if (typeof id[1] === 'string') {
+            op = yield * this.getOperation(id)
+          } else {
+            op = yield * this.getInsertion(id)
+          }
+          if (op == null) {
+            store.listenersById[sid] = l
+          } else {
+            for (let i = 0; i < l.length; i++) {
+              let listener = l[i]
+              let o = listener.op
+              if (--listener.missing === 0) {
+                yield * store.tryExecute.call(this, o)
+              }
+            }
+          }
+        }
+      })
+    }
+    /*
+      Actually execute an operation, when all expected operations are available.
+    */
+    /* :: // TODO: this belongs somehow to transaction
+    store: Object;
+    getOperation: any;
+    isGarbageCollected: any;
+    addOperation: any;
+    whenOperationsExist: any;
+    */
+    * tryExecute (op) {
+      this.store.addToDebug('yield * this.store.tryExecute.call(this, ', JSON.stringify(op), ')')
+      if (op.struct === 'Delete') {
+        yield * Y.Struct.Delete.execute.call(this, op)
+        // this is now called in Transaction.deleteOperation!
+        // yield * this.store.operationAdded(this, op)
+      } else {
+        // check if this op was defined
+        var defined = yield * this.getInsertion(op.id)
+        while (defined != null && defined.content != null) {
+          // check if this op has a longer content in the case it is defined
+          if (defined.id[1] + defined.content.length < op.id[1] + op.content.length) {
+            var overlapSize = defined.content.length - (op.id[1] - defined.id[1])
+            op.content.splice(0, overlapSize)
+            op.id = [op.id[0], op.id[1] + overlapSize]
+            op.left = Y.utils.getLastId(defined)
+            op.origin = op.left
+            defined = yield * this.getOperation(op.id) // getOperation suffices here
+          } else {
+            break
+          }
+        }
+        if (defined == null) {
+          var opid = op.id
+          var isGarbageCollected = yield * this.isGarbageCollected(opid)
+          if (!isGarbageCollected) {
+            // TODO: reduce number of get / put calls for op ..
+            yield * Y.Struct[op.struct].execute.call(this, op)
+            yield * this.addOperation(op)
+            yield * this.store.operationAdded(this, op)
+            // operationAdded can change op..
+            op = yield * this.getOperation(opid)
+            // if insertion, try to combine with left
+            yield * this.tryCombineWithLeft(op)
+          }
+        }
+      }
+    }
+    /*
+     * Called by a transaction when an operation is added.
+     * This function is especially important for y-indexeddb, where several instances may share a single database.
+     * Every time an operation is created by one instance, it is send to all other instances and operationAdded is called
+     *
+     * If it's not a Delete operation:
+     *   * Checks if another operation is executable (listenersById)
+     *   * Update state, if possible
+     *
+     * Always:
+     *   * Call type
+     */
+    * operationAdded (transaction, op) {
+      if (op.struct === 'Delete') {
+        var type = this.initializedTypes[JSON.stringify(op.targetParent)]
+        if (type != null) {
+          yield * type._changed(transaction, op)
+        }
+      } else {
+        // increase SS
+        yield * transaction.updateState(op.id[0])
+        var opLen = op.content != null ? op.content.length : 1
+        for (let i = 0; i < opLen; i++) {
+          // notify whenOperation listeners (by id)
+          var sid = JSON.stringify([op.id[0], op.id[1] + i])
+          var l = this.listenersById[sid]
+          delete this.listenersById[sid]
+          if (l != null) {
+            for (var key in l) {
+              var listener = l[key]
+              if (--listener.missing === 0) {
+                this.whenOperationsExist([], listener.op)
+              }
+            }
+          }
+        }
+        var t = this.initializedTypes[JSON.stringify(op.parent)]
+
+        // if parent is deleted, mark as gc'd and return
+        if (op.parent != null) {
+          var parentIsDeleted = yield * transaction.isDeleted(op.parent)
+          if (parentIsDeleted) {
+            yield * transaction.deleteList(op.id)
+            return
+          }
+        }
+
+        // notify parent, if it was instanciated as a custom type
+        if (t != null) {
+          let o = Y.utils.copyOperation(op)
+          yield * t._changed(transaction, o)
+        }
+        if (!op.deleted) {
+          // Delete if DS says this is actually deleted
+          var len = op.content != null ? op.content.length : 1
+          var startId = op.id // You must not use op.id in the following loop, because op will change when deleted
+            // TODO: !! console.log('TODO: change this before commiting')
+          for (let i = 0; i < len; i++) {
+            var id = [startId[0], startId[1] + i]
+            var opIsDeleted = yield * transaction.isDeleted(id)
+            if (opIsDeleted) {
+              var delop = {
+                struct: 'Delete',
+                target: id
+              }
+              yield * this.tryExecute.call(transaction, delop)
+            }
+          }
+        }
+      }
+    }
+    whenTransactionsFinished () {
+      if (this.transactionInProgress) {
+        if (this.transactionsFinished == null) {
+          var resolve_
+          var promise = new Promise(function (resolve) {
+            resolve_ = resolve
+          })
+          this.transactionsFinished = {
+            resolve: resolve_,
+            promise: promise
+          }
+        }
+        return this.transactionsFinished.promise
+      } else {
+        return Promise.resolve()
+      }
+    }
+    // Check if there is another transaction request.
+    // * the last transaction is always a flush :)
+    getNextRequest () {
+      if (this.waitingTransactions.length === 0) {
+        if (this.transactionIsFlushed) {
+          this.transactionInProgress = false
+          this.transactionIsFlushed = false
+          if (this.transactionsFinished != null) {
+            this.transactionsFinished.resolve()
+            this.transactionsFinished = null
+          }
+          return null
+        } else {
+          this.transactionIsFlushed = true
+          return function * () {
+            yield * this.flush()
+          }
+        }
+      } else {
+        this.transactionIsFlushed = false
+        return this.waitingTransactions.shift()
+      }
+    }
+    requestTransaction (makeGen/* :any */, callImmediately) {
+      this.waitingTransactions.push(makeGen)
+      if (!this.transactionInProgress) {
+        this.transactionInProgress = true
+        setTimeout(() => {
+          this.transact(this.getNextRequest())
+        }, 0)
+      }
+    }
+    /*
+      Get a created/initialized type.
+    */
+    getType (id) {
+      return this.initializedTypes[JSON.stringify(id)]
+    }
+    /*
+      Init type. This is called when a remote operation is retrieved, and transformed to a type
+      TODO: delete type from store.initializedTypes[id] when corresponding id was deleted!
+    */
+    * initType (id, args) {
+      var sid = JSON.stringify(id)
+      var t = this.store.initializedTypes[sid]
+      if (t == null) {
+        var op/* :MapStruct | ListStruct */ = yield * this.getOperation(id)
+        if (op != null) {
+          t = yield * Y[op.type].typeDefinition.initType.call(this, this.store, op, args)
+          this.store.initializedTypes[sid] = t
+        }
+      }
+      return t
+    }
+    /*
+     Create type. This is called when the local user creates a type (which is a synchronous action)
+    */
+    createType (typedefinition, id) {
+      var structname = typedefinition[0].struct
+      id = id || this.getNextOpId(1)
+      var op = Y.Struct[structname].create(id)
+      op.type = typedefinition[0].name
+
+      this.requestTransaction(function * () {
+        if (op.id[0] === '_') {
+          yield * this.setOperation(op)
+        } else {
+          yield * this.applyCreatedOperations([op])
+        }
+      })
+      var t = Y[op.type].typeDefinition.createType(this, op, typedefinition[1])
+      this.initializedTypes[JSON.stringify(op.id)] = t
+      return t
+    }
+  }
+  Y.AbstractDatabase = AbstractDatabase
+}

src/Database.spec.js

@@ -0,0 +1,354 @@
+/* global async, databases, describe, beforeEach, afterEach */
+/* eslint-env browser,jasmine,console */
+'use strict'
+
+var Y = require('./SpecHelper.js')
+
+for (let database of databases) {
+  describe(`Database (${database})`, function () {
+    var store
+    describe('DeleteStore', function () {
+      describe('Basic', function () {
+        beforeEach(function () {
+          store = new Y[database](null, {
+            gcTimeout: -1,
+            namespace: 'testing'
+          })
+        })
+        afterEach(function (done) {
+          store.requestTransaction(function * () {
+            yield * this.store.destroy()
+            done()
+          })
+        })
+        it('Deleted operation is deleted', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['u1', 10], 1)
+            expect(yield * this.isDeleted(['u1', 10])).toBeTruthy()
+            expect(yield * this.getDeleteSet()).toEqual({'u1': [[10, 1, false]]})
+            done()
+          })
+        }))
+        it('Deleted operation extends other deleted operation', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['u1', 10], 1)
+            yield * this.markDeleted(['u1', 11], 1)
+            expect(yield * this.isDeleted(['u1', 10])).toBeTruthy()
+            expect(yield * this.isDeleted(['u1', 11])).toBeTruthy()
+            expect(yield * this.getDeleteSet()).toEqual({'u1': [[10, 2, false]]})
+            done()
+          })
+        }))
+        it('Deleted operation extends other deleted operation', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['0', 3], 1)
+            yield * this.markDeleted(['0', 4], 1)
+            yield * this.markDeleted(['0', 2], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'0': [[2, 3, false]]})
+            done()
+          })
+        }))
+        it('Debug #1', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['166', 0], 1)
+            yield * this.markDeleted(['166', 2], 1)
+            yield * this.markDeleted(['166', 0], 1)
+            yield * this.markDeleted(['166', 2], 1)
+            yield * this.markGarbageCollected(['166', 2], 1)
+            yield * this.markDeleted(['166', 1], 1)
+            yield * this.markDeleted(['166', 3], 1)
+            yield * this.markGarbageCollected(['166', 3], 1)
+            yield * this.markDeleted(['166', 0], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'166': [[0, 2, false], [2, 2, true]]})
+            done()
+          })
+        }))
+        it('Debug #2', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['293', 0], 1)
+            yield * this.markDeleted(['291', 2], 1)
+            yield * this.markDeleted(['291', 2], 1)
+            yield * this.markGarbageCollected(['293', 0], 1)
+            yield * this.markDeleted(['293', 1], 1)
+            yield * this.markGarbageCollected(['291', 2], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'291': [[2, 1, true]], '293': [[0, 1, true], [1, 1, false]]})
+            done()
+          })
+        }))
+        it('Debug #3', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['581', 0], 1)
+            yield * this.markDeleted(['581', 1], 1)
+            yield * this.markDeleted(['580', 0], 1)
+            yield * this.markDeleted(['580', 0], 1)
+            yield * this.markGarbageCollected(['581', 0], 1)
+            yield * this.markDeleted(['581', 2], 1)
+            yield * this.markDeleted(['580', 1], 1)
+            yield * this.markDeleted(['580', 2], 1)
+            yield * this.markDeleted(['580', 1], 1)
+            yield * this.markDeleted(['580', 2], 1)
+            yield * this.markGarbageCollected(['581', 2], 1)
+            yield * this.markGarbageCollected(['581', 1], 1)
+            yield * this.markGarbageCollected(['580', 1], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'580': [[0, 1, false], [1, 1, true], [2, 1, false]], '581': [[0, 3, true]]})
+            done()
+          })
+        }))
+        it('Debug #4', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['544', 0], 1)
+            yield * this.markDeleted(['543', 2], 1)
+            yield * this.markDeleted(['544', 0], 1)
+            yield * this.markDeleted(['543', 2], 1)
+            yield * this.markGarbageCollected(['544', 0], 1)
+            yield * this.markDeleted(['545', 1], 1)
+            yield * this.markDeleted(['543', 4], 1)
+            yield * this.markDeleted(['543', 3], 1)
+            yield * this.markDeleted(['544', 1], 1)
+            yield * this.markDeleted(['544', 2], 1)
+            yield * this.markDeleted(['544', 1], 1)
+            yield * this.markDeleted(['544', 2], 1)
+            yield * this.markGarbageCollected(['543', 2], 1)
+            yield * this.markGarbageCollected(['543', 4], 1)
+            yield * this.markGarbageCollected(['544', 2], 1)
+            yield * this.markGarbageCollected(['543', 3], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'543': [[2, 3, true]], '544': [[0, 1, true], [1, 1, false], [2, 1, true]], '545': [[1, 1, false]]})
+            done()
+          })
+        }))
+        it('Debug #5', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.applyDeleteSet({'16': [[1, 2, false]], '17': [[0, 1, true], [1, 3, false]]})
+            expect(yield * this.getDeleteSet()).toEqual({'16': [[1, 2, false]], '17': [[0, 1, true], [1, 3, false]]})
+            yield * this.applyDeleteSet({'16': [[1, 2, false]], '17': [[0, 4, true]]})
+            expect(yield * this.getDeleteSet()).toEqual({'16': [[1, 2, false]], '17': [[0, 4, true]]})
+            done()
+          })
+        }))
+        it('Debug #6', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.applyDeleteSet({'40': [[0, 3, false]]})
+            expect(yield * this.getDeleteSet()).toEqual({'40': [[0, 3, false]]})
+            yield * this.applyDeleteSet({'39': [[2, 2, false]], '40': [[0, 1, true], [1, 2, false]], '41': [[2, 1, false]]})
+            expect(yield * this.getDeleteSet()).toEqual({'39': [[2, 2, false]], '40': [[0, 1, true], [1, 2, false]], '41': [[2, 1, false]]})
+            done()
+          })
+        }))
+        it('Debug #7', async(function * (done) {
+          store.requestTransaction(function * () {
+            yield * this.markDeleted(['9', 2], 1)
+            yield * this.markDeleted(['11', 2], 1)
+            yield * this.markDeleted(['11', 4], 1)
+            yield * this.markDeleted(['11', 1], 1)
+            yield * this.markDeleted(['9', 4], 1)
+            yield * this.markDeleted(['10', 0], 1)
+            yield * this.markGarbageCollected(['11', 2], 1)
+            yield * this.markDeleted(['11', 2], 1)
+            yield * this.markGarbageCollected(['11', 3], 1)
+            yield * this.markDeleted(['11', 3], 1)
+            yield * this.markDeleted(['11', 3], 1)
+            yield * this.markDeleted(['9', 4], 1)
+            yield * this.markDeleted(['10', 0], 1)
+            yield * this.markGarbageCollected(['11', 1], 1)
+            yield * this.markDeleted(['11', 1], 1)
+            expect(yield * this.getDeleteSet()).toEqual({'9': [[2, 1, false], [4, 1, false]], '10': [[0, 1, false]], '11': [[1, 3, true], [4, 1, false]]})
+            done()
+          })
+        }))
+      })
+    })
+    describe('OperationStore', function () {
+      describe('Basic Tests', function () {
+        beforeEach(function () {
+          store = new Y[database](null, {
+            gcTimeout: -1,
+            namespace: 'testing'
+          })
+        })
+        afterEach(function (done) {
+          store.requestTransaction(function * () {
+            yield * this.store.destroy()
+            done()
+          })
+        })
+        it('debug #1', function (done) {
+          store.requestTransaction(function * () {
+            yield * this.os.put({id: [2]})
+            yield * this.os.put({id: [0]})
+            yield * this.os.delete([2])
+            yield * this.os.put({id: [1]})
+            expect(yield * this.os.find([0])).toBeTruthy()
+            expect(yield * this.os.find([1])).toBeTruthy()
+            expect(yield * this.os.find([2])).toBeFalsy()
+            done()
+          })
+        })
+        it('can add&retrieve 5 elements', function (done) {
+          store.requestTransaction(function * () {
+            yield * this.os.put({val: 'four', id: [4]})
+            yield * this.os.put({val: 'one', id: [1]})
+            yield * this.os.put({val: 'three', id: [3]})
+            yield * this.os.put({val: 'two', id: [2]})
+            yield * this.os.put({val: 'five', id: [5]})
+            expect((yield * this.os.find([1])).val).toEqual('one')
+            expect((yield * this.os.find([2])).val).toEqual('two')
+            expect((yield * this.os.find([3])).val).toEqual('three')
+            expect((yield * this.os.find([4])).val).toEqual('four')
+            expect((yield * this.os.find([5])).val).toEqual('five')
+            done()
+          })
+        })
+        it('5 elements do not exist anymore after deleting them', function (done) {
+          store.requestTransaction(function * () {
+            yield * this.os.put({val: 'four', id: [4]})
+            yield * this.os.put({val: 'one', id: [1]})
+            yield * this.os.put({val: 'three', id: [3]})
+            yield * this.os.put({val: 'two', id: [2]})
+            yield * this.os.put({val: 'five', id: [5]})
+            yield * this.os.delete([4])
+            expect(yield * this.os.find([4])).not.toBeTruthy()
+            yield * this.os.delete([3])
+            expect(yield * this.os.find([3])).not.toBeTruthy()
+            yield * this.os.delete([2])
+            expect(yield * this.os.find([2])).not.toBeTruthy()
+            yield * this.os.delete([1])
+            expect(yield * this.os.find([1])).not.toBeTruthy()
+            yield * this.os.delete([5])
+            expect(yield * this.os.find([5])).not.toBeTruthy()
+            done()
+          })
+        })
+      })
+      var numberOfOSTests = 1000
+      describe(`Random Tests - after adding&deleting (0.8/0.2) ${numberOfOSTests} times`, function () {
+        var elements = []
+        beforeAll(function (done) {
+          store = new Y[database](null, {
+            gcTimeout: -1,
+            namespace: 'testing'
+          })
+          store.requestTransaction(function * () {
+            for (var i = 0; i < numberOfOSTests; i++) {
+              var r = Math.random()
+              if (r < 0.8) {
+                var obj = [Math.floor(Math.random() * numberOfOSTests * 10000)]
+                if (!(yield * this.os.find(obj))) {
+                  elements.push(obj)
+                  yield * this.os.put({id: obj})
+                }
+              } else if (elements.length > 0) {
+                var elemid = Math.floor(Math.random() * elements.length)
+                var elem = elements[elemid]
+                elements = elements.filter(function (e) {
+                  return !Y.utils.compareIds(e, elem)
+                })
+                yield * this.os.delete(elem)
+              }
+            }
+            done()
+          })
+        })
+        afterAll(function (done) {
+          store.requestTransaction(function * () {
+            yield * this.store.destroy()
+            done()
+          })
+        })
+        it('can find every object', function (done) {
+          store.requestTransaction(function * () {
+            for (var id of elements) {
+              expect((yield * this.os.find(id)).id).toEqual(id)
+            }
+            done()
+          })
+        })
+
+        it('can find every object with lower bound search', function (done) {
+          store.requestTransaction(function * () {
+            for (var id of elements) {
+              var e = yield * this.os.findWithLowerBound(id)
+              expect(e.id).toEqual(id)
+            }
+            done()
+          })
+        })
+
+        it('iterating over a tree with lower bound yields the right amount of results', function (done) {
+          var lowerBound = elements[Math.floor(Math.random() * elements.length)]
+          var expectedResults = elements.filter(function (e, pos) {
+            return (Y.utils.smaller(lowerBound, e) || Y.utils.compareIds(e, lowerBound)) && elements.indexOf(e) === pos
+          }).length
+
+          var actualResults = 0
+          store.requestTransaction(function * () {
+            yield * this.os.iterate(this, lowerBound, null, function * (val) {
+              expect(val).toBeDefined()
+              actualResults++
+            })
+            expect(expectedResults).toEqual(actualResults)
+            done()
+          })
+        })
+
+        it('iterating over a tree without bounds yield the right amount of results', function (done) {
+          var lowerBound = null
+          var expectedResults = elements.filter(function (e, pos) {
+            return elements.indexOf(e) === pos
+          }).length
+          var actualResults = 0
+          store.requestTransaction(function * () {
+            yield * this.os.iterate(this, lowerBound, null, function * (val) {
+              expect(val).toBeDefined()
+              actualResults++
+            })
+            expect(expectedResults).toEqual(actualResults)
+            done()
+          })
+        })
+
+        it('iterating over a tree with upper bound yields the right amount of results', function (done) {
+          var upperBound = elements[Math.floor(Math.random() * elements.length)]
+          var expectedResults = elements.filter(function (e, pos) {
+            return (Y.utils.smaller(e, upperBound) || Y.utils.compareIds(e, upperBound)) && elements.indexOf(e) === pos
+          }).length
+
+          var actualResults = 0
+          store.requestTransaction(function * () {
+            yield * this.os.iterate(this, null, upperBound, function * (val) {
+              expect(val).toBeDefined()
+              actualResults++
+            })
+            expect(expectedResults).toEqual(actualResults)
+            done()
+          })
+        })
+
+        it('iterating over a tree with upper and lower bounds yield the right amount of results', function (done) {
+          var b1 = elements[Math.floor(Math.random() * elements.length)]
+          var b2 = elements[Math.floor(Math.random() * elements.length)]
+          var upperBound, lowerBound
+          if (Y.utils.smaller(b1, b2)) {
+            lowerBound = b1
+            upperBound = b2
+          } else {
+            lowerBound = b2
+            upperBound = b1
+          }
+          var expectedResults = elements.filter(function (e, pos) {
+            return (Y.utils.smaller(lowerBound, e) || Y.utils.compareIds(e, lowerBound)) &&
+              (Y.utils.smaller(e, upperBound) || Y.utils.compareIds(e, upperBound)) && elements.indexOf(e) === pos
+          }).length
+          var actualResults = 0
+          store.requestTransaction(function * () {
+            yield * this.os.iterate(this, lowerBound, upperBound, function * (val) {
+              expect(val).toBeDefined()
+              actualResults++
+            })
+            expect(expectedResults).toEqual(actualResults)
+            done()
+          })
+        })
+      })
+    })
+  })
+}

src/Notes.md

@@ -0,0 +1,12 @@
+
+# Notes
+
+### Terminology
+
+* DB: DataBase that holds all the information of the shared object. It is devided into the OS, DS, and SS. This can be a persistent database or an in-memory database. Depending on the type of database, it could make sense to store OS, DS, and SS in different tables, or maybe different databases.
+* OS: OperationStore holds all the operations. An operation is a js object with a fixed number of name fields.
+* DS: DeleteStore holds the information about which operations are deleted and which operations were garbage collected (no longer available in the OS).
+* SS: StateSet holds the current state of the OS. SS.getState(username) refers to the amount of operations that were received by that respective user.
+* Op: Operation defines an action on a shared type. But it is also the format in which we store the model of a type. This is why it is also called a Struct/Structure.
+* Type and Structure: We crearly distinguish between type and structure. Short explanation: A type (e.g. Strings, Numbers) have a number of functions that you can apply on them. (+) is well defined on both of them. They are *modeled* by a structure - the functions really change the structure of a type. Types can be implemented differently but still provide the same functionality. In Yjs, almost all types are realized as a doubly linked list (on which Yjs can provide eventual convergence)
+*

src/SpecHelper.js

@@ -0,0 +1,404 @@
+/* eslint-env browser, jasmine */
+
+/*
+  This is just a compilation of functions that help to test this library!
+*/
+
+// When testing, you store everything on the global object. We call it g
+
+var Y = require('./y.js')
+require('../../y-memory/src/Memory.js')(Y)
+require('../../y-array/src/Array.js')(Y)
+require('../../y-map/src/Map.js')(Y)
+require('../../y-indexeddb/src/IndexedDB.js')(Y)
+
+module.exports = Y
+
+var g
+if (typeof global !== 'undefined') {
+  g = global
+} else if (typeof window !== 'undefined') {
+  g = window
+} else {
+  throw new Error('No global object?')
+}
+g.g = g
+
+// Helper methods for the random number generator
+Math.seedrandom = require('seedrandom')
+
+g.generateRandomSeed = function generateRandomSeed () {
+  var seed
+  if (typeof window !== 'undefined' && window.location.hash.length > 1) {
+    seed = window.location.hash.slice(1) // first character is the hash!
+    console.warn('Using random seed that was specified in the url!')
+  } else {
+    seed = JSON.stringify(Math.random())
+  }
+  console.info('Using random seed: ' + seed)
+  g.setRandomSeed(seed)
+}
+
+g.setRandomSeed = function setRandomSeed (seed) {
+  Math.seedrandom.currentSeed = seed
+  Math.seedrandom(Math.seedrandom.currentSeed, { global: true })
+}
+
+g.generateRandomSeed()
+
+g.YConcurrencyTestingMode = true
+
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 200000
+
+g.describeManyTimes = function describeManyTimes (times, name, f) {
+  for (var i = 0; i < times; i++) {
+    describe(name, f)
+  }
+}
+
+/*
+  Wait for a specified amount of time (in ms). defaults to 5ms
+*/
+function wait (t) {
+  if (t == null) {
+    t = 0
+  }
+  return new Promise(function (resolve) {
+    setTimeout(function () {
+      resolve()
+    }, t)
+  })
+}
+g.wait = wait
+
+g.databases = ['memory']
+if (typeof window !== 'undefined') {
+  g.databases.push('indexeddb')
+} else {
+  g.databases.push('leveldb')
+}
+/*
+  returns a random element of o.
+  works on Object, and Array
+*/
+function getRandom (o) {
+  if (o instanceof Array) {
+    return o[Math.floor(Math.random() * o.length)]
+  } else if (o.constructor === Object) {
+    return o[getRandom(Object.keys(o))]
+  }
+}
+g.getRandom = getRandom
+
+function getRandomNumber (n) {
+  if (n == null) {
+    n = 9999
+  }
+  return Math.floor(Math.random() * n)
+}
+g.getRandomNumber = getRandomNumber
+
+function getRandomString () {
+  var chars = 'abcdefghijklmnopqrstuvwxyzäüöABCDEFGHIJKLMNOPQRSTUVWXYZÄÜÖ'
+  var char = chars[getRandomNumber(chars.length)] // ü\n\n\n\n\n\n\n'
+  var length = getRandomNumber(7)
+  var string = ''
+  for (var i = 0; i < length; i++) {
+    string += char
+  }
+  return string
+}
+g.getRandomString = getRandomString
+
+function * applyTransactions (relAmount, numberOfTransactions, objects, users, transactions, noReconnect) {
+  g.generateRandomSeed() // create a new seed, so we can re-create the behavior
+  for (var i = 0; i < numberOfTransactions * relAmount + 1; i++) {
+    var r = Math.random()
+    if (r > 0.95) {
+      // 10% chance of toggling concurrent user interactions.
+      // There will be an artificial delay until ops can be executed by the type,
+      // therefore, operations of the database will be (pre)transformed until user operations arrive
+      yield (function simulateConcurrentUserInteractions (type) {
+        if (!(type instanceof Y.utils.CustomType) && type.y instanceof Y.utils.CustomType) {
+          // usually we expect type to be a custom type. But in YXml we share an object {y: YXml, dom: Dom} instead
+          type = type.y
+        }
+        if (type.eventHandler.awaiting === 0 && type.eventHandler._debuggingAwaiting !== true) {
+          type.eventHandler.awaiting = 1
+          type.eventHandler._debuggingAwaiting = true
+        } else {
+          // fixAwaitingInType will handle _debuggingAwaiting
+          return fixAwaitingInType(type)
+        }
+      })(getRandom(objects))
+    } else if (r >= 0.5) {
+      // 40% chance to flush
+      yield Y.utils.globalRoom.flushOne() // flushes for some user.. (not necessarily 0)
+    } else if (noReconnect || r >= 0.05) {
+      // 45% chance to create operation
+      var done = getRandom(transactions)(getRandom(objects))
+      if (done != null) {
+        yield done
+      } else {
+        yield wait()
+      }
+      yield Y.utils.globalRoom.whenTransactionsFinished()
+    } else {
+      // 5% chance to disconnect/reconnect
+      var u = getRandom(users)
+      yield Promise.all(objects.map(fixAwaitingInType))
+      if (u.connector.isDisconnected()) {
+        yield u.reconnect()
+      } else {
+        yield u.disconnect()
+      }
+      yield Promise.all(objects.map(fixAwaitingInType))
+    }
+  }
+}
+
+function fixAwaitingInType (type) {
+  if (!(type instanceof Y.utils.CustomType) && type.y instanceof Y.utils.CustomType) {
+    // usually we expect type to be a custom type. But in YXml we share an object {y: YXml, dom: Dom} instead
+    type = type.y
+  }
+  return new Promise(function (resolve) {
+    type.os.whenTransactionsFinished().then(function () {
+      // _debuggingAwaiting artificially increases the awaiting property. We need to make sure that we only do that once / reverse the effect once
+      type.os.requestTransaction(function * () {
+        if (type.eventHandler.awaiting > 0 && type.eventHandler._debuggingAwaiting === true) {
+          type.eventHandler._debuggingAwaiting = false
+          yield * type.eventHandler.awaitOps(this, function * () { /* mock function */ })
+        }
+        wait(50).then(type.os.whenTransactionsFinished()).then(wait(50)).then(resolve)
+      })
+    })
+  })
+}
+g.fixAwaitingInType = fixAwaitingInType
+
+g.applyRandomTransactionsNoGCNoDisconnect = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+  yield * applyTransactions(1, numberOfTransactions, objects, users, transactions, true)
+  yield Y.utils.globalRoom.flushAll()
+  yield Promise.all(objects.map(fixAwaitingInType))
+})
+
+g.applyRandomTransactionsAllRejoinNoGC = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+  yield * applyTransactions(1, numberOfTransactions, objects, users, transactions)
+  yield Promise.all(objects.map(fixAwaitingInType))
+  yield Y.utils.globalRoom.flushAll()
+  yield Promise.all(objects.map(fixAwaitingInType))
+  for (var u in users) {
+    yield Promise.all(objects.map(fixAwaitingInType))
+    yield users[u].reconnect()
+    yield Promise.all(objects.map(fixAwaitingInType))
+  }
+  yield Promise.all(objects.map(fixAwaitingInType))
+  yield Y.utils.globalRoom.flushAll()
+  yield Promise.all(objects.map(fixAwaitingInType))
+  yield g.garbageCollectAllUsers(users)
+})
+
+g.applyRandomTransactionsWithGC = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+  yield * applyTransactions(1, numberOfTransactions, objects, users.slice(1), transactions)
+  yield Y.utils.globalRoom.flushAll()
+  yield Promise.all(objects.map(fixAwaitingInType))
+  for (var u in users) {
+    // TODO: here, we enforce that two users never sync at the same time with u[0]
+    //       enforce that in the connector itself!
+    yield users[u].reconnect()
+  }
+  yield Y.utils.globalRoom.flushAll()
+  yield Promise.all(objects.map(fixAwaitingInType))
+  yield g.garbageCollectAllUsers(users)
+})
+
+g.garbageCollectAllUsers = async(function * garbageCollectAllUsers (users) {
+  yield Y.utils.globalRoom.flushAll()
+  for (var i in users) {
+    yield users[i].db.emptyGarbageCollector()
+  }
+})
+
+g.compareAllUsers = async(function * compareAllUsers (users) {
+  var s1, s2 // state sets
+  var ds1, ds2 // delete sets
+  var allDels1, allDels2 // all deletions
+  var db1 = [] // operation store of user1
+
+  yield Y.utils.globalRoom.flushAll()
+  yield g.garbageCollectAllUsers(users)
+  yield Y.utils.globalRoom.flushAll()
+
+  // disconnect, then reconnect all users
+  // We do this to make sure that the gc is updated by everyone
+  for (var i = 0; i < users.length; i++) {
+    yield users[i].disconnect()
+    yield wait()
+    yield users[i].reconnect()
+  }
+  yield wait()
+  yield Y.utils.globalRoom.flushAll()
+
+  // t1 and t2 basically do the same. They define t[1,2], ds[1,2], and allDels[1,2]
+  function * t1 () {
+    s1 = yield * this.getStateSet()
+    ds1 = yield * this.getDeleteSet()
+    allDels1 = []
+    yield * this.ds.iterate(this, null, null, function * (d) {
+      allDels1.push(d)
+    })
+  }
+  function * t2 () {
+    s2 = yield * this.getStateSet()
+    ds2 = yield * this.getDeleteSet()
+    allDels2 = []
+    yield * this.ds.iterate(this, null, null, function * (d) {
+      allDels2.push(d)
+    })
+  }
+
+  var buffer = Y.utils.globalRoom.buffers
+  for (var name in buffer) {
+    if (buffer[name].length > 0) {
+      // not all ops were transmitted..
+      debugger // eslint-disable-line
+    }
+  }
+
+  for (var uid = 0; uid < users.length; uid++) {
+    var u = users[uid]
+    u.db.requestTransaction(function * () {
+      var sv = yield * this.getStateVector()
+      for (var s of sv) {
+        yield * this.updateState(s.user)
+      }
+      // compare deleted ops against deleteStore
+      yield * this.os.iterate(this, null, null, function * (o) {
+        if (o.deleted === true) {
+          expect(yield * this.isDeleted(o.id)).toBeTruthy()
+        }
+      })
+      // compare deleteStore against deleted ops
+      var ds = []
+      yield * this.ds.iterate(this, null, null, function * (d) {
+        ds.push(d)
+      })
+      for (var j in ds) {
+        var d = ds[j]
+        for (var i = 0; i < d.len; i++) {
+          var o = yield * this.getInsertion([d.id[0], d.id[1] + i])
+          // gc'd or deleted
+          if (d.gc) {
+            expect(o).toBeFalsy()
+          } else {
+            expect(o.deleted).toBeTruthy()
+          }
+        }
+      }
+    })
+    // compare allDels tree
+    if (s1 == null) {
+      u.db.requestTransaction(function * () {
+        yield * t1.call(this)
+        yield * this.os.iterate(this, null, null, function * (o) {
+          o = Y.utils.copyObject(o)
+          delete o.origin
+          delete o.originOf
+          db1.push(o)
+        })
+      })
+    } else {
+      u.db.requestTransaction(function * () {
+        yield * t2.call(this)
+        var db2 = []
+        yield * this.os.iterate(this, null, null, function * (o) {
+          o = Y.utils.copyObject(o)
+          delete o.origin
+          delete o.originOf
+          db2.push(o)
+        })
+        expect(s1).toEqual(s2)
+        expect(allDels1).toEqual(allDels2) // inner structure
+        expect(ds1).toEqual(ds2) // exported structure
+        db2.forEach((o, i) => {
+          expect(db1[i]).toEqual(o)
+        })
+      })
+    }
+    yield u.db.whenTransactionsFinished()
+  }
+})
+
+g.createUsers = async(function * createUsers (self, numberOfUsers, database, initType) {
+  if (Y.utils.globalRoom.users[0] != null) {
+    yield Y.utils.globalRoom.flushAll()
+  }
+  // destroy old users
+  for (var u in Y.utils.globalRoom.users) {
+    Y.utils.globalRoom.users[u].y.destroy()
+  }
+  self.users = null
+
+  var promises = []
+  for (var i = 0; i < numberOfUsers; i++) {
+    promises.push(Y({
+      db: {
+        name: database,
+        namespace: 'User ' + i,
+        cleanStart: true,
+        gcTimeout: -1,
+        gc: true,
+        repairCheckInterval: -1
+      },
+      connector: {
+        name: 'Test',
+        debug: false
+      },
+      share: {
+        root: initType || 'Map'
+      }
+    }))
+  }
+  self.users = yield Promise.all(promises)
+  self.types = self.users.map(function (u) { return u.share.root })
+  return self.users
+})
+
+/*
+  Until async/await arrives in js, we use this function to wait for promises
+  by yielding them.
+*/
+function async (makeGenerator) {
+  return function (arg) {
+    var generator = makeGenerator.apply(this, arguments)
+
+    function handle (result) {
+      if (result.done) return Promise.resolve(result.value)
+
+      return Promise.resolve(result.value).then(function (res) {
+        return handle(generator.next(res))
+      }, function (err) {
+        return handle(generator.throw(err))
+      })
+    }
+    try {
+      return handle(generator.next())
+    } catch (ex) {
+      generator.throw(ex)
+      // return Promise.reject(ex)
+    }
+  }
+}
+g.async = async
+
+function logUsers (self) {
+  if (self.constructor === Array) {
+    self = {users: self}
+  }
+  self.users[0].db.logTable()
+  self.users[1].db.logTable()
+  self.users[2].db.logTable()
+}
+
+g.logUsers = logUsers

src/Struct.js

@@ -0,0 +1,414 @@
+/* @flow */
+'use strict'
+
+/*
+ An operation also defines the structure of a type. This is why operation and
+ structure are used interchangeably here.
+
+ It must be of the type Object. I hope to achieve some performance
+ improvements when working on databases that support the json format.
+
+ An operation must have the following properties:
+
+ * encode
+     - Encode the structure in a readable format (preferably string- todo)
+ * decode (todo)
+     - decode structure to json
+ * execute
+     - Execute the semantics of an operation.
+ * requiredOps
+     - Operations that are required to execute this operation.
+*/
+export default function extendStruct (Y) {
+  var Struct = {
+    /* This is the only operation that is actually not a structure, because
+    it is not stored in the OS. This is why it _does not_ have an id
+
+    op = {
+      target: Id
+    }
+    */
+    Delete: {
+      encode: function (op) {
+        return {
+          target: op.target,
+          length: op.length || 0,
+          struct: 'Delete'
+        }
+      },
+      requiredOps: function (op) {
+        return [] // [op.target]
+      },
+      execute: function * (op) {
+        return yield * this.deleteOperation(op.target, op.length || 1)
+      }
+    },
+    Insert: {
+      /* {
+          content: [any],
+          opContent: Id,
+          id: Id,
+          left: Id,
+          origin: Id,
+          right: Id,
+          parent: Id,
+          parentSub: string (optional), // child of Map type
+        }
+      */
+      encode: function (op/* :Insertion */) /* :Insertion */ {
+        // TODO: you could not send the "left" property, then you also have to
+        // "op.left = null" in $execute or $decode
+        var e/* :any */ = {
+          id: op.id,
+          left: op.left,
+          right: op.right,
+          origin: op.origin,
+          parent: op.parent,
+          struct: op.struct
+        }
+        if (op.parentSub != null) {
+          e.parentSub = op.parentSub
+        }
+        if (op.hasOwnProperty('opContent')) {
+          e.opContent = op.opContent
+        } else {
+          e.content = op.content.slice()
+        }
+
+        return e
+      },
+      requiredOps: function (op) {
+        var ids = []
+        if (op.left != null) {
+          ids.push(op.left)
+        }
+        if (op.right != null) {
+          ids.push(op.right)
+        }
+        if (op.origin != null && !Y.utils.compareIds(op.left, op.origin)) {
+          ids.push(op.origin)
+        }
+        // if (op.right == null && op.left == null) {
+        ids.push(op.parent)
+
+        if (op.opContent != null) {
+          ids.push(op.opContent)
+        }
+        return ids
+      },
+      getDistanceToOrigin: function * (op) {
+        if (op.left == null) {
+          return 0
+        } else {
+          var d = 0
+          var o = yield * this.getInsertion(op.left)
+          while (!Y.utils.matchesId(o, op.origin)) {
+            d++
+            if (o.left == null) {
+              break
+            } else {
+              o = yield * this.getInsertion(o.left)
+            }
+          }
+          return d
+        }
+      },
+      /*
+      # $this has to find a unique position between origin and the next known character
+      # case 1: $origin equals $o.origin: the $creator parameter decides if left or right
+      #         let $OL= [o1,o2,o3,o4], whereby $this is to be inserted between o1 and o4
+      #         o2,o3 and o4 origin is 1 (the position of o2)
+      #         there is the case that $this.creator < o2.creator, but o3.creator < $this.creator
+      #         then o2 knows o3. Since on another client $OL could be [o1,o3,o4] the problem is complex
+      #         therefore $this would be always to the right of o3
+      # case 2: $origin < $o.origin
+      #         if current $this insert_position > $o origin: $this ins
+      #         else $insert_position will not change
+      #         (maybe we encounter case 1 later, then this will be to the right of $o)
+      # case 3: $origin > $o.origin
+      #         $this insert_position is to the left of $o (forever!)
+      */
+      execute: function * (op) {
+        var i // loop counter
+
+        // during this function some ops may get split into two pieces (e.g. with getInsertionCleanEnd)
+        // We try to merge them later, if possible
+        var tryToRemergeLater = []
+
+        if (op.origin != null) { // TODO: !== instead of !=
+          // we save in origin that op originates in it
+          // we need that later when we eventually garbage collect origin (see transaction)
+          var origin = yield * this.getInsertionCleanEnd(op.origin)
+          if (origin.originOf == null) {
+            origin.originOf = []
+          }
+          origin.originOf.push(op.id)
+          yield * this.setOperation(origin)
+          if (origin.right != null) {
+            tryToRemergeLater.push(origin.right)
+          }
+        }
+        var distanceToOrigin = i = yield * Struct.Insert.getDistanceToOrigin.call(this, op) // most cases: 0 (starts from 0)
+
+        // now we begin to insert op in the list of insertions..
+        var o
+        var parent
+        var start
+
+        // find o. o is the first conflicting operation
+        if (op.left != null) {
+          o = yield * this.getInsertionCleanEnd(op.left)
+          if (!Y.utils.compareIds(op.left, op.origin) && o.right != null) {
+            // only if not added previously
+            tryToRemergeLater.push(o.right)
+          }
+          o = (o.right == null) ? null : yield * this.getOperation(o.right)
+        } else { // left == null
+          parent = yield * this.getOperation(op.parent)
+          let startId = op.parentSub ? parent.map[op.parentSub] : parent.start
+          start = startId == null ? null : yield * this.getOperation(startId)
+          o = start
+        }
+
+        // make sure to split op.right if necessary (also add to tryCombineWithLeft)
+        if (op.right != null) {
+          tryToRemergeLater.push(op.right)
+          yield * this.getInsertionCleanStart(op.right)
+        }
+
+        // handle conflicts
+        while (true) {
+          if (o != null && !Y.utils.compareIds(o.id, op.right)) {
+            var oOriginDistance = yield * Struct.Insert.getDistanceToOrigin.call(this, o)
+            if (oOriginDistance === i) {
+              // case 1
+              if (o.id[0] < op.id[0]) {
+                op.left = Y.utils.getLastId(o)
+                distanceToOrigin = i + 1 // just ignore o.content.length, doesn't make a difference
+              }
+            } else if (oOriginDistance < i) {
+              // case 2
+              if (i - distanceToOrigin <= oOriginDistance) {
+                op.left = Y.utils.getLastId(o)
+                distanceToOrigin = i + 1 // just ignore o.content.length, doesn't make a difference
+              }
+            } else {
+              break
+            }
+            i++
+            if (o.right != null) {
+              o = yield * this.getInsertion(o.right)
+            } else {
+              o = null
+            }
+          } else {
+            break
+          }
+        }
+
+        // reconnect..
+        var left = null
+        var right = null
+        if (parent == null) {
+          parent = yield * this.getOperation(op.parent)
+        }
+
+        // reconnect left and set right of op
+        if (op.left != null) {
+          left = yield * this.getInsertion(op.left)
+          // link left
+          op.right = left.right
+          left.right = op.id
+
+          yield * this.setOperation(left)
+        } else {
+          // set op.right from parent, if necessary
+          op.right = op.parentSub ? parent.map[op.parentSub] || null : parent.start
+        }
+        // reconnect right
+        if (op.right != null) {
+          // TODO: wanna connect right too?
+          right = yield * this.getOperation(op.right)
+          right.left = Y.utils.getLastId(op)
+
+          // if right exists, and it is supposed to be gc'd. Remove it from the gc
+          if (right.gc != null) {
+            if (right.content != null && right.content.length > 1) {
+              right = yield * this.getInsertionCleanEnd(right.id)
+            }
+            this.store.removeFromGarbageCollector(right)
+          }
+          yield * this.setOperation(right)
+        }
+
+        // update parents .map/start/end properties
+        if (op.parentSub != null) {
+          if (left == null) {
+            parent.map[op.parentSub] = op.id
+            yield * this.setOperation(parent)
+          }
+          // is a child of a map struct.
+          // Then also make sure that only the most left element is not deleted
+          // We do not call the type in this case (this is what the third parameter is for)
+          if (op.right != null) {
+            yield * this.deleteOperation(op.right, 1, true)
+          }
+          if (op.left != null) {
+            yield * this.deleteOperation(op.id, 1, true)
+          }
+        } else {
+          if (right == null || left == null) {
+            if (right == null) {
+              parent.end = Y.utils.getLastId(op)
+            }
+            if (left == null) {
+              parent.start = op.id
+            }
+            yield * this.setOperation(parent)
+          }
+        }
+
+        // try to merge original op.left and op.origin
+        for (i = 0; i < tryToRemergeLater.length; i++) {
+          var m = yield * this.getOperation(tryToRemergeLater[i])
+          yield * this.tryCombineWithLeft(m)
+        }
+      }
+    },
+    List: {
+      /*
+      {
+        start: null,
+        end: null,
+        struct: "List",
+        type: "",
+        id: this.os.getNextOpId(1)
+      }
+      */
+      create: function (id) {
+        return {
+          start: null,
+          end: null,
+          struct: 'List',
+          id: id
+        }
+      },
+      encode: function (op) {
+        var e = {
+          struct: 'List',
+          id: op.id,
+          type: op.type
+        }
+        if (op.requires != null) {
+          e.requires = op.requires
+        }
+        if (op.info != null) {
+          e.info = op.info
+        }
+        return e
+      },
+      requiredOps: function () {
+        /*
+        var ids = []
+        if (op.start != null) {
+          ids.push(op.start)
+        }
+        if (op.end != null){
+          ids.push(op.end)
+        }
+        return ids
+        */
+        return []
+      },
+      execute: function * (op) {
+        op.start = null
+        op.end = null
+      },
+      ref: function * (op, pos) {
+        if (op.start == null) {
+          return null
+        }
+        var res = null
+        var o = yield * this.getOperation(op.start)
+
+        while (true) {
+          if (!o.deleted) {
+            res = o
+            pos--
+          }
+          if (pos >= 0 && o.right != null) {
+            o = yield * this.getOperation(o.right)
+          } else {
+            break
+          }
+        }
+        return res
+      },
+      map: function * (o, f) {
+        o = o.start
+        var res = []
+        while (o != null) { // TODO: change to != (at least some convention)
+          var operation = yield * this.getOperation(o)
+          if (!operation.deleted) {
+            res.push(f(operation))
+          }
+          o = operation.right
+        }
+        return res
+      }
+    },
+    Map: {
+      /*
+        {
+          map: {},
+          struct: "Map",
+          type: "",
+          id: this.os.getNextOpId(1)
+        }
+      */
+      create: function (id) {
+        return {
+          id: id,
+          map: {},
+          struct: 'Map'
+        }
+      },
+      encode: function (op) {
+        var e = {
+          struct: 'Map',
+          type: op.type,
+          id: op.id,
+          map: {} // overwrite map!!
+        }
+        if (op.requires != null) {
+          e.requires = op.requires
+        }
+        if (op.info != null) {
+          e.info = op.info
+        }
+        return e
+      },
+      requiredOps: function () {
+        return []
+      },
+      execute: function * () {},
+      /*
+        Get a property by name
+      */
+      get: function * (op, name) {
+        var oid = op.map[name]
+        if (oid != null) {
+          var res = yield * this.getOperation(oid)
+          if (res == null || res.deleted) {
+            return void 0
+          } else if (res.opContent == null) {
+            return res.content[0]
+          } else {
+            return yield * this.getType(res.opContent)
+          }
+        }
+      }
+    }
+  }
+  Y.Struct = Struct
+}

src/Utils.js

@@ -0,0 +1,825 @@
+/*
+  EventHandler is an helper class for constructing custom types.
+
+  Why: When constructing custom types, you sometimes want your types to work
+  synchronous: E.g.
+  ``` Synchronous
+    mytype.setSomething("yay")
+    mytype.getSomething() === "yay"
+  ```
+  versus
+  ``` Asynchronous
+    mytype.setSomething("yay")
+    mytype.getSomething() === undefined
+    mytype.waitForSomething().then(function(){
+      mytype.getSomething() === "yay"
+    })
+  ```
+
+  The structures usually work asynchronously (you have to wait for the
+  database request to finish). EventHandler helps you to make your type
+  synchronous.
+*/
+
+export default function Utils (Y) {
+  Y.utils = {}
+
+  Y.utils.bubbleEvent = function (type, event) {
+    type.eventHandler.callEventListeners(event)
+    event.path = []
+    while (type != null && type._deepEventHandler != null) {
+      type._deepEventHandler.callEventListeners(event)
+      var parent = null
+      if (type._parent != null) {
+        parent = type.os.getType(type._parent)
+      }
+      if (parent != null && parent._getPathToChild != null) {
+        event.path = [parent._getPathToChild(type._model)].concat(event.path)
+        type = parent
+      } else {
+        type = null
+      }
+    }
+  }
+
+  class NamedEventHandler {
+    constructor () {
+      this._eventListener = {}
+    }
+    on (name, f) {
+      if (this._eventListener[name] == null) {
+        this._eventListener[name] = []
+      }
+      this._eventListener[name].push(f)
+    }
+    off (name, f) {
+      if (name == null || f == null) {
+        throw new Error('You must specify event name and function!')
+      }
+      let listener = this._eventListener[name] || []
+      this._eventListener[name] = listener.filter(e => e !== f)
+    }
+    emit (name, value) {
+      (this._eventListener[name] || []).forEach(l => l(value))
+    }
+    destroy () {
+      this._eventListener = null
+    }
+  }
+  Y.utils.NamedEventHandler = NamedEventHandler
+
+  class EventListenerHandler {
+    constructor () {
+      this.eventListeners = []
+    }
+    destroy () {
+      this.eventListeners = null
+    }
+     /*
+      Basic event listener boilerplate...
+    */
+    addEventListener (f) {
+      this.eventListeners.push(f)
+    }
+    removeEventListener (f) {
+      this.eventListeners = this.eventListeners.filter(function (g) {
+        return f !== g
+      })
+    }
+    removeAllEventListeners () {
+      this.eventListeners = []
+    }
+    callEventListeners (event) {
+      for (var i = 0; i < this.eventListeners.length; i++) {
+        try {
+          var _event = {}
+          for (var name in event) {
+            _event[name] = event[name]
+          }
+          this.eventListeners[i](_event)
+        } catch (e) {
+          /*
+            Your observer threw an error. This error was caught so that Yjs
+            can ensure data consistency! In order to debug this error you
+            have to check "Pause On Caught Exceptions" in developer tools.
+          */
+          console.error(e)
+        }
+      }
+    }
+  }
+  Y.utils.EventListenerHandler = EventListenerHandler
+
+  class EventHandler extends EventListenerHandler {
+    /* ::
+    waiting: Array<Insertion | Deletion>;
+    awaiting: number;
+    onevent: Function;
+    eventListeners: Array<Function>;
+    */
+    /*
+      onevent: is called when the structure changes.
+
+      Note: "awaiting opertations" is used to denote operations that were
+      prematurely called. Events for received operations can not be executed until
+      all prematurely called operations were executed ("waiting operations")
+    */
+    constructor (onevent /* : Function */) {
+      super()
+      this.waiting = []
+      this.awaiting = 0
+      this.onevent = onevent
+    }
+    destroy () {
+      super.destroy()
+      this.waiting = null
+      this.onevent = null
+    }
+    /*
+      Call this when a new operation arrives. It will be executed right away if
+      there are no waiting operations, that you prematurely executed
+    */
+    receivedOp (op) {
+      if (this.awaiting <= 0) {
+        this.onevent(op)
+      } else if (op.struct === 'Delete') {
+        var self = this
+        var checkDelete = function checkDelete (d) {
+          if (d.length == null) {
+            throw new Error('This shouldn\'t happen! d.length must be defined!')
+          }
+          // we check if o deletes something in self.waiting
+          // if so, we remove the deleted operation
+          for (var w = 0; w < self.waiting.length; w++) {
+            var i = self.waiting[w]
+            if (i.struct === 'Insert' && i.id[0] === d.target[0]) {
+              var iLength = i.hasOwnProperty('content') ? i.content.length : 1
+              var dStart = d.target[1]
+              var dEnd = d.target[1] + (d.length || 1)
+              var iStart = i.id[1]
+              var iEnd = i.id[1] + iLength
+              // Check if they don't overlap
+              if (iEnd <= dStart || dEnd <= iStart) {
+                // no overlapping
+                continue
+              }
+              // we check all overlapping cases. All cases:
+              /*
+                1)  iiiii
+                      ddddd
+                    --> modify i and d
+                2)  iiiiiii
+                      ddddd
+                    --> modify i, remove d
+                3)  iiiiiii
+                      ddd
+                    --> remove d, modify i, and create another i (for the right hand side)
+                4)  iiiii
+                    ddddddd
+                    --> remove i, modify d
+                5)  iiiiiii
+                    ddddddd
+                    --> remove both i and d (**)
+                6)  iiiiiii
+                    ddddd
+                    --> modify i, remove d
+                7)    iii
+                    ddddddd
+                    --> remove i, create and apply two d with checkDelete(d) (**)
+                8)    iiiii
+                    ddddddd
+                    --> remove i, modify d (**)
+                9)    iiiii
+                    ddddd
+                    --> modify i and d
+                (**) (also check if i contains content or type)
+              */
+              // TODO: I left some debugger statements, because I want to debug all cases once in production. REMEMBER END TODO
+              if (iStart < dStart) {
+                if (dStart < iEnd) {
+                  if (iEnd < dEnd) {
+                    // Case 1
+                    // remove the right part of i's content
+                    i.content.splice(dStart - iStart)
+                    // remove the start of d's deletion
+                    d.length = dEnd - iEnd
+                    d.target = [d.target[0], iEnd]
+                    continue
+                  } else if (iEnd === dEnd) {
+                    // Case 2
+                    i.content.splice(dStart - iStart)
+                    // remove d, we do that by simply ending this function
+                    return
+                  } else { // (dEnd < iEnd)
+                    // Case 3
+                    var newI = {
+                      id: [i.id[0], dEnd],
+                      content: i.content.slice(dEnd - iStart),
+                      struct: 'Insert'
+                    }
+                    self.waiting.push(newI)
+                    i.content.splice(dStart - iStart)
+                    return
+                  }
+                }
+              } else if (dStart === iStart) {
+                if (iEnd < dEnd) {
+                  // Case 4
+                  d.length = dEnd - iEnd
+                  d.target = [d.target[0], iEnd]
+                  i.content = []
+                  continue
+                } else if (iEnd === dEnd) {
+                  // Case 5
+                  self.waiting.splice(w, 1)
+                  return
+                } else { // (dEnd < iEnd)
+                  // Case 6
+                  i.content = i.content.slice(dEnd - iStart)
+                  i.id = [i.id[0], dEnd]
+                  return
+                }
+              } else { // (dStart < iStart)
+                if (iStart < dEnd) {
+                  // they overlap
+                  /*
+                  7)    iii
+                      ddddddd
+                      --> remove i, create and apply two d with checkDelete(d) (**)
+                  8)    iiiii
+                      ddddddd
+                      --> remove i, modify d (**)
+                  9)    iiiii
+                      ddddd
+                      --> modify i and d
+                  */
+                  if (iEnd < dEnd) {
+                    // Case 7
+                    // debugger // TODO: You did not test this case yet!!!! (add the debugger here)
+                    self.waiting.splice(w, 1)
+                    checkDelete({
+                      target: [d.target[0], dStart],
+                      length: iStart - dStart,
+                      struct: 'Delete'
+                    })
+                    checkDelete({
+                      target: [d.target[0], iEnd],
+                      length: iEnd - dEnd,
+                      struct: 'Delete'
+                    })
+                    return
+                  } else if (iEnd === dEnd) {
+                    // Case 8
+                    self.waiting.splice(w, 1)
+                    w--
+                    d.length -= iLength
+                    continue
+                  } else { // dEnd < iEnd
+                    // Case 9
+                    d.length = iStart - dStart
+                    i.content.splice(0, dEnd - iStart)
+                    i.id = [i.id[0], dEnd]
+                    continue
+                  }
+                }
+              }
+            }
+          }
+          // finished with remaining operations
+          self.waiting.push(d)
+        }
+        if (op.key == null) {
+          // deletes in list
+          checkDelete(op)
+        } else {
+          // deletes in map
+          this.waiting.push(op)
+        }
+      } else {
+        this.waiting.push(op)
+      }
+    }
+    /*
+      You created some operations, and you want the `onevent` function to be
+      called right away. Received operations will not be executed untill all
+      prematurely called operations are executed
+    */
+    awaitAndPrematurelyCall (ops) {
+      this.awaiting++
+      ops.map(Y.utils.copyOperation).forEach(this.onevent)
+    }
+    * awaitOps (transaction, f, args) {
+      function notSoSmartSort (array) {
+        // this function sorts insertions in a executable order
+        var result = []
+        while (array.length > 0) {
+          for (var i = 0; i < array.length; i++) {
+            var independent = true
+            for (var j = 0; j < array.length; j++) {
+              if (Y.utils.matchesId(array[j], array[i].left)) {
+                // array[i] depends on array[j]
+                independent = false
+                break
+              }
+            }
+            if (independent) {
+              result.push(array.splice(i, 1)[0])
+              i--
+            }
+          }
+        }
+        return result
+      }
+      var before = this.waiting.length
+      // somehow create new operations
+      yield * f.apply(transaction, args)
+      // remove all appended ops / awaited ops
+      this.waiting.splice(before)
+      if (this.awaiting > 0) this.awaiting--
+      // if there are no awaited ops anymore, we can update all waiting ops, and send execute them (if there are still no awaited ops)
+      if (this.awaiting === 0 && this.waiting.length > 0) {
+        // update all waiting ops
+        for (let i = 0; i < this.waiting.length; i++) {
+          var o = this.waiting[i]
+          if (o.struct === 'Insert') {
+            var _o = yield * transaction.getInsertion(o.id)
+            if (_o.parentSub != null && _o.left != null) {
+              // if o is an insertion of a map struc (parentSub is defined), then it shouldn't be necessary to compute left
+              this.waiting.splice(i, 1)
+              i-- // update index
+            } else if (!Y.utils.compareIds(_o.id, o.id)) {
+              // o got extended
+              o.left = [o.id[0], o.id[1] - 1]
+            } else if (_o.left == null) {
+              o.left = null
+            } else {
+              // find next undeleted op
+              var left = yield * transaction.getInsertion(_o.left)
+              while (left.deleted != null) {
+                if (left.left != null) {
+                  left = yield * transaction.getInsertion(left.left)
+                } else {
+                  left = null
+                  break
+                }
+              }
+              o.left = left != null ? Y.utils.getLastId(left) : null
+            }
+          }
+        }
+        // the previous stuff was async, so we have to check again!
+        // We also pull changes from the bindings, if there exists such a method, this could increase awaiting too
+        if (this._pullChanges != null) {
+          this._pullChanges()
+        }
+        if (this.awaiting === 0) {
+          // sort by type, execute inserts first
+          var ins = []
+          var dels = []
+          this.waiting.forEach(function (o) {
+            if (o.struct === 'Delete') {
+              dels.push(o)
+            } else {
+              ins.push(o)
+            }
+          })
+          this.waiting = []
+          // put in executable order
+          ins = notSoSmartSort(ins)
+          // this.onevent can trigger the creation of another operation
+          // -> check if this.awaiting increased & stop computation if it does
+          for (var i = 0; i < ins.length; i++) {
+            if (this.awaiting === 0) {
+              this.onevent(ins[i])
+            } else {
+              this.waiting = this.waiting.concat(ins.slice(i))
+              break
+            }
+          }
+          for (i = 0; i < dels.length; i++) {
+            if (this.awaiting === 0) {
+              this.onevent(dels[i])
+            } else {
+              this.waiting = this.waiting.concat(dels.slice(i))
+              break
+            }
+          }
+        }
+      }
+    }
+    // TODO: Remove awaitedInserts and awaitedDeletes in favor of awaitedOps, as they are deprecated and do not always work
+    // Do this in one of the coming releases that are breaking anyway
+    /*
+      Call this when you successfully awaited the execution of n Insert operations
+    */
+    awaitedInserts (n) {
+      var ops = this.waiting.splice(this.waiting.length - n)
+      for (var oid = 0; oid < ops.length; oid++) {
+        var op = ops[oid]
+        if (op.struct === 'Insert') {
+          for (var i = this.waiting.length - 1; i >= 0; i--) {
+            let w = this.waiting[i]
+            // TODO: do I handle split operations correctly here? Super unlikely, but yeah..
+            // Also: can this case happen? Can op be inserted in the middle of a larger op that is in $waiting?
+            if (w.struct === 'Insert') {
+              if (Y.utils.matchesId(w, op.left)) {
+                // include the effect of op in w
+                w.right = op.id
+                // exclude the effect of w in op
+                op.left = w.left
+              } else if (Y.utils.compareIds(w.id, op.right)) {
+                // similar..
+                w.left = Y.utils.getLastId(op)
+                op.right = w.right
+              }
+            }
+          }
+        } else {
+          throw new Error('Expected Insert Operation!')
+        }
+      }
+      this._tryCallEvents(n)
+    }
+    /*
+      Call this when you successfully awaited the execution of n Delete operations
+    */
+    awaitedDeletes (n, newLeft) {
+      var ops = this.waiting.splice(this.waiting.length - n)
+      for (var j = 0; j < ops.length; j++) {
+        var del = ops[j]
+        if (del.struct === 'Delete') {
+          if (newLeft != null) {
+            for (var i = 0; i < this.waiting.length; i++) {
+              let w = this.waiting[i]
+              // We will just care about w.left
+              if (w.struct === 'Insert' && Y.utils.compareIds(del.target, w.left)) {
+                w.left = newLeft
+              }
+            }
+          }
+        } else {
+          throw new Error('Expected Delete Operation!')
+        }
+      }
+      this._tryCallEvents(n)
+    }
+    /* (private)
+      Try to execute the events for the waiting operations
+    */
+    _tryCallEvents () {
+      function notSoSmartSort (array) {
+        var result = []
+        while (array.length > 0) {
+          for (var i = 0; i < array.length; i++) {
+            var independent = true
+            for (var j = 0; j < array.length; j++) {
+              if (Y.utils.matchesId(array[j], array[i].left)) {
+                // array[i] depends on array[j]
+                independent = false
+                break
+              }
+            }
+            if (independent) {
+              result.push(array.splice(i, 1)[0])
+              i--
+            }
+          }
+        }
+        return result
+      }
+      if (this.awaiting > 0) this.awaiting--
+      if (this.awaiting === 0 && this.waiting.length > 0) {
+        var ins = []
+        var dels = []
+        this.waiting.forEach(function (o) {
+          if (o.struct === 'Delete') {
+            dels.push(o)
+          } else {
+            ins.push(o)
+          }
+        })
+        ins = notSoSmartSort(ins)
+        ins.forEach(this.onevent)
+        dels.forEach(this.onevent)
+        this.waiting = []
+      }
+    }
+  }
+  Y.utils.EventHandler = EventHandler
+
+  /*
+    Default class of custom types!
+  */
+  class CustomType {
+    getPath () {
+      var parent = null
+      if (this._parent != null) {
+        parent = this.os.getType(this._parent)
+      }
+      if (parent != null && parent._getPathToChild != null) {
+        var firstKey = parent._getPathToChild(this._model)
+        var parentKeys = parent.getPath()
+        parentKeys.push(firstKey)
+        return parentKeys
+      } else {
+        return []
+      }
+    }
+  }
+  Y.utils.CustomType = CustomType
+
+  /*
+    A wrapper for the definition of a custom type.
+    Every custom type must have three properties:
+
+    * struct
+      - Structname of this type
+    * initType
+      - Given a model, creates a custom type
+    * class
+      - the constructor of the custom type (e.g. in order to inherit from a type)
+  */
+  class CustomTypeDefinition { // eslint-disable-line
+    /* ::
+    struct: any;
+    initType: any;
+    class: Function;
+    name: String;
+    */
+    constructor (def) {
+      if (def.struct == null ||
+        def.initType == null ||
+        def.class == null ||
+        def.name == null ||
+        def.createType == null
+      ) {
+        throw new Error('Custom type was not initialized correctly!')
+      }
+      this.struct = def.struct
+      this.initType = def.initType
+      this.createType = def.createType
+      this.class = def.class
+      this.name = def.name
+      if (def.appendAdditionalInfo != null) {
+        this.appendAdditionalInfo = def.appendAdditionalInfo
+      }
+      this.parseArguments = (def.parseArguments || function () {
+        return [this]
+      }).bind(this)
+      this.parseArguments.typeDefinition = this
+    }
+  }
+  Y.utils.CustomTypeDefinition = CustomTypeDefinition
+
+  Y.utils.isTypeDefinition = function isTypeDefinition (v) {
+    if (v != null) {
+      if (v instanceof Y.utils.CustomTypeDefinition) return [v]
+      else if (v.constructor === Array && v[0] instanceof Y.utils.CustomTypeDefinition) return v
+      else if (v instanceof Function && v.typeDefinition instanceof Y.utils.CustomTypeDefinition) return [v.typeDefinition]
+    }
+    return false
+  }
+
+  /*
+    Make a flat copy of an object
+    (just copy properties)
+  */
+  function copyObject (o) {
+    var c = {}
+    for (var key in o) {
+      c[key] = o[key]
+    }
+    return c
+  }
+  Y.utils.copyObject = copyObject
+
+  /*
+    Copy an operation, so that it can be manipulated.
+    Note: You must not change subproperties (except o.content)!
+  */
+  function copyOperation (o) {
+    o = copyObject(o)
+    if (o.content != null) {
+      o.content = o.content.map(function (c) { return c })
+    }
+    return o
+  }
+
+  Y.utils.copyOperation = copyOperation
+
+  /*
+    Defines a smaller relation on Id's
+  */
+  function smaller (a, b) {
+    return a[0] < b[0] || (a[0] === b[0] && (a[1] < b[1] || typeof a[1] < typeof b[1]))
+  }
+  Y.utils.smaller = smaller
+
+  function inDeletionRange (del, ins) {
+    return del.target[0] === ins[0] && del.target[1] <= ins[1] && ins[1] < del.target[1] + (del.length || 1)
+  }
+  Y.utils.inDeletionRange = inDeletionRange
+
+  function compareIds (id1, id2) {
+    if (id1 == null || id2 == null) {
+      return id1 === id2
+    } else {
+      return id1[0] === id2[0] && id1[1] === id2[1]
+    }
+  }
+  Y.utils.compareIds = compareIds
+
+  function matchesId (op, id) {
+    if (id == null || op == null) {
+      return id === op
+    } else {
+      if (id[0] === op.id[0]) {
+        if (op.content == null) {
+          return id[1] === op.id[1]
+        } else {
+          return id[1] >= op.id[1] && id[1] < op.id[1] + op.content.length
+        }
+      }
+    }
+    return false
+  }
+  Y.utils.matchesId = matchesId
+
+  function getLastId (op) {
+    if (op.content == null || op.content.length === 1) {
+      return op.id
+    } else {
+      return [op.id[0], op.id[1] + op.content.length - 1]
+    }
+  }
+  Y.utils.getLastId = getLastId
+
+  function createEmptyOpsArray (n) {
+    var a = new Array(n)
+    for (var i = 0; i < a.length; i++) {
+      a[i] = {
+        id: [null, null]
+      }
+    }
+    return a
+  }
+
+  function createSmallLookupBuffer (Store) {
+    /*
+      This buffer implements a very small buffer that temporarily stores operations
+      after they are read / before they are written.
+      The buffer basically implements FIFO. Often requested lookups will be re-queued every time they are looked up / written.
+
+      It can speed up lookups on Operation Stores and State Stores. But it does not require notable use of memory or processing power.
+
+      Good for os and ss, bot not for ds (because it often uses methods that require a flush)
+
+      I tried to optimize this for performance, therefore no highlevel operations.
+    */
+    class SmallLookupBuffer extends Store {
+      constructor (arg1, arg2) {
+        // super(...arguments) -- do this when this is supported by stable nodejs
+        super(arg1, arg2)
+        this.writeBuffer = createEmptyOpsArray(5)
+        this.readBuffer = createEmptyOpsArray(10)
+      }
+      * find (id, noSuperCall) {
+        var i, r
+        for (i = this.readBuffer.length - 1; i >= 0; i--) {
+          r = this.readBuffer[i]
+          // we don't have to use compareids, because id is always defined!
+          if (r.id[1] === id[1] && r.id[0] === id[0]) {
+            // found r
+            // move r to the end of readBuffer
+            for (; i < this.readBuffer.length - 1; i++) {
+              this.readBuffer[i] = this.readBuffer[i + 1]
+            }
+            this.readBuffer[this.readBuffer.length - 1] = r
+            return r
+          }
+        }
+        var o
+        for (i = this.writeBuffer.length - 1; i >= 0; i--) {
+          r = this.writeBuffer[i]
+          if (r.id[1] === id[1] && r.id[0] === id[0]) {
+            o = r
+            break
+          }
+        }
+        if (i < 0 && noSuperCall === undefined) {
+          // did not reach break in last loop
+          // read id and put it to the end of readBuffer
+          o = yield * super.find(id)
+        }
+        if (o != null) {
+          for (i = 0; i < this.readBuffer.length - 1; i++) {
+            this.readBuffer[i] = this.readBuffer[i + 1]
+          }
+          this.readBuffer[this.readBuffer.length - 1] = o
+        }
+        return o
+      }
+      * put (o) {
+        var id = o.id
+        var i, r // helper variables
+        for (i = this.writeBuffer.length - 1; i >= 0; i--) {
+          r = this.writeBuffer[i]
+          if (r.id[1] === id[1] && r.id[0] === id[0]) {
+            // is already in buffer
+            // forget r, and move o to the end of writeBuffer
+            for (; i < this.writeBuffer.length - 1; i++) {
+              this.writeBuffer[i] = this.writeBuffer[i + 1]
+            }
+            this.writeBuffer[this.writeBuffer.length - 1] = o
+            break
+          }
+        }
+        if (i < 0) {
+          // did not reach break in last loop
+          // write writeBuffer[0]
+          var write = this.writeBuffer[0]
+          if (write.id[0] !== null) {
+            yield * super.put(write)
+          }
+          // put o to the end of writeBuffer
+          for (i = 0; i < this.writeBuffer.length - 1; i++) {
+            this.writeBuffer[i] = this.writeBuffer[i + 1]
+          }
+          this.writeBuffer[this.writeBuffer.length - 1] = o
+        }
+        // check readBuffer for every occurence of o.id, overwrite if found
+        // whether found or not, we'll append o to the readbuffer
+        for (i = 0; i < this.readBuffer.length - 1; i++) {
+          r = this.readBuffer[i + 1]
+          if (r.id[1] === id[1] && r.id[0] === id[0]) {
+            this.readBuffer[i] = o
+          } else {
+            this.readBuffer[i] = r
+          }
+        }
+        this.readBuffer[this.readBuffer.length - 1] = o
+      }
+      * delete (id) {
+        var i, r
+        for (i = 0; i < this.readBuffer.length; i++) {
+          r = this.readBuffer[i]
+          if (r.id[1] === id[1] && r.id[0] === id[0]) {
+            this.readBuffer[i] = {
+              id: [null, null]
+            }
+          }
+        }
+        yield * this.flush()
+        yield * super.delete(id)
+      }
+      * findWithLowerBound (id) {
+        var o = yield * this.find(id, true)
+        if (o != null) {
+          return o
+        } else {
+          yield * this.flush()
+          return yield * super.findWithLowerBound.apply(this, arguments)
+        }
+      }
+      * findWithUpperBound (id) {
+        var o = yield * this.find(id, true)
+        if (o != null) {
+          return o
+        } else {
+          yield * this.flush()
+          return yield * super.findWithUpperBound.apply(this, arguments)
+        }
+      }
+      * findNext () {
+        yield * this.flush()
+        return yield * super.findNext.apply(this, arguments)
+      }
+      * findPrev () {
+        yield * this.flush()
+        return yield * super.findPrev.apply(this, arguments)
+      }
+      * iterate () {
+        yield * this.flush()
+        yield * super.iterate.apply(this, arguments)
+      }
+      * flush () {
+        for (var i = 0; i < this.writeBuffer.length; i++) {
+          var write = this.writeBuffer[i]
+          if (write.id[0] !== null) {
+            yield * super.put(write)
+            this.writeBuffer[i] = {
+              id: [null, null]
+            }
+          }
+        }
+      }
+    }
+    return SmallLookupBuffer
+  }
+  Y.utils.createSmallLookupBuffer = createSmallLookupBuffer
+
+  // Generates a unique id, for use as a user id.
+  // Thx to @jed for this script https://gist.github.com/jed/982883
+  function generateGuid(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,generateGuid)} // eslint-disable-line
+  Y.utils.generateGuid = generateGuid
+}

src/y.js

@@ -0,0 +1,241 @@
+import debug from 'debug'
+import extendConnector from './Connector.js'
+import extendDatabase from './Database.js'
+import extendTransaction from './Transaction.js'
+import extendStruct from './Struct.js'
+import extendUtils from './Utils.js'
+
+extendConnector(Y)
+extendDatabase(Y)
+extendTransaction(Y)
+extendStruct(Y)
+extendUtils(Y)
+
+Y.debug = debug
+
+var requiringModules = {}
+
+Y.requiringModules = requiringModules
+
+Y.extend = function (name, value) {
+  if (arguments.length === 2 && typeof name === 'string') {
+    if (value instanceof Y.utils.CustomTypeDefinition) {
+      Y[name] = value.parseArguments
+    } else {
+      Y[name] = value
+    }
+    if (requiringModules[name] != null) {
+      requiringModules[name].resolve()
+      delete requiringModules[name]
+    }
+  } else {
+    for (var i = 0; i < arguments.length; i++) {
+      var f = arguments[i]
+      if (typeof f === 'function') {
+        f(Y)
+      } else {
+        throw new Error('Expected function!')
+      }
+    }
+  }
+}
+
+Y.requestModules = requestModules
+function requestModules (modules) {
+  var sourceDir
+  if (Y.sourceDir === null) {
+    sourceDir = null
+  } else {
+    sourceDir = Y.sourceDir || '/bower_components'
+  }
+  // determine if this module was compiled for es5 or es6 (y.js vs. y.es6)
+  // if Insert.execute is a Function, then it isnt a generator..
+  // then load the es5(.js) files..
+  var extention = typeof regeneratorRuntime !== 'undefined' ? '.js' : '.es6'
+  var promises = []
+  for (var i = 0; i < modules.length; i++) {
+    var module = modules[i].split('(')[0]
+    var modulename = 'y-' + module.toLowerCase()
+    if (Y[module] == null) {
+      if (requiringModules[module] == null) {
+        // module does not exist
+        if (typeof window !== 'undefined' && window.Y !== 'undefined') {
+          if (sourceDir != null) {
+            var imported = document.createElement('script')
+            imported.src = sourceDir + '/' + modulename + '/' + modulename + extention
+            document.head.appendChild(imported)
+          }
+          let requireModule = {}
+          requiringModules[module] = requireModule
+          requireModule.promise = new Promise(function (resolve) {
+            requireModule.resolve = resolve
+          })
+          promises.push(requireModule.promise)
+        } else {
+          console.info('YJS: Please do not depend on automatic requiring of modules anymore! Extend modules as follows `require(\'y-modulename\')(Y)`')
+          require(modulename)(Y)
+        }
+      } else {
+        promises.push(requiringModules[modules[i]].promise)
+      }
+    }
+  }
+  return Promise.all(promises)
+}
+
+/* ::
+type MemoryOptions = {
+  name: 'memory'
+}
+type IndexedDBOptions = {
+  name: 'indexeddb',
+  namespace: string
+}
+type DbOptions = MemoryOptions | IndexedDBOptions
+
+type WebRTCOptions = {
+  name: 'webrtc',
+  room: string
+}
+type WebsocketsClientOptions = {
+  name: 'websockets-client',
+  room: string
+}
+type ConnectionOptions = WebRTCOptions | WebsocketsClientOptions
+
+type YOptions = {
+  connector: ConnectionOptions,
+  db: DbOptions,
+  types: Array<TypeName>,
+  sourceDir: string,
+  share: {[key: string]: TypeName}
+}
+*/
+
+export default function Y (opts/* :YOptions */) /* :Promise<YConfig> */ {
+  if (opts.hasOwnProperty('sourceDir')) {
+    Y.sourceDir = opts.sourceDir
+  }
+  opts.types = opts.types != null ? opts.types : []
+  var modules = [opts.db.name, opts.connector.name].concat(opts.types)
+  for (var name in opts.share) {
+    modules.push(opts.share[name])
+  }
+  return new Promise(function (resolve, reject) {
+    if (opts == null) reject(new Error('An options object is expected!'))
+    else if (opts.connector == null) reject(new Error('You must specify a connector! (missing connector property)'))
+    else if (opts.connector.name == null) reject(new Error('You must specify connector name! (missing connector.name property)'))
+    else if (opts.db == null) reject(new Error('You must specify a database! (missing db property)'))
+    else if (opts.connector.name == null) reject(new Error('You must specify db name! (missing db.name property)'))
+    else {
+      opts = Y.utils.copyObject(opts)
+      opts.connector = Y.utils.copyObject(opts.connector)
+      opts.db = Y.utils.copyObject(opts.db)
+      opts.share = Y.utils.copyObject(opts.share)
+      Y.requestModules(modules).then(function () {
+        var yconfig = new YConfig(opts)
+        yconfig.db.whenUserIdSet(function () {
+          yconfig.init(function () {
+            resolve(yconfig)
+          })
+        })
+      }).catch(reject)
+    }
+  })
+}
+
+class YConfig extends Y.utils.NamedEventHandler {
+  /* ::
+  db: Y.AbstractDatabase;
+  connector: Y.AbstractConnector;
+  share: {[key: string]: any};
+  options: Object;
+  */
+  constructor (opts, callback) {
+    super()
+    this.options = opts
+    this.db = new Y[opts.db.name](this, opts.db)
+    this.connector = new Y[opts.connector.name](this, opts.connector)
+    this.connected = true
+  }
+  init (callback) {
+    var opts = this.options
+    var share = {}
+    this.share = share
+    this.db.requestTransaction(function * requestTransaction () {
+      // create shared object
+      for (var propertyname in opts.share) {
+        var typeConstructor = opts.share[propertyname].split('(')
+        var typeName = typeConstructor.splice(0, 1)
+        var type = Y[typeName]
+        var typedef = type.typeDefinition
+        var id = ['_', typedef.struct + '_' + typeName + '_' + propertyname + '_' + typeConstructor]
+        var args = []
+        if (typeConstructor.length === 1) {
+          try {
+            args = JSON.parse('[' + typeConstructor[0].split(')')[0] + ']')
+          } catch (e) {
+            throw new Error('Was not able to parse type definition! (share.' + propertyname + ')')
+          }
+          if (type.typeDefinition.parseArguments == null) {
+            throw new Error(typeName + ' does not expect arguments!')
+          } else {
+            args = typedef.parseArguments(args[0])[1]
+          }
+        }
+        share[propertyname] = yield * this.store.initType.call(this, id, args)
+      }
+      this.store.whenTransactionsFinished()
+        .then(callback)
+    })
+  }
+  isConnected () {
+    return this.connector.isSynced
+  }
+  disconnect () {
+    if (this.connected) {
+      this.connected = false
+      return this.connector.disconnect()
+    } else {
+      return Promise.resolve()
+    }
+  }
+  reconnect () {
+    if (!this.connected) {
+      this.connected = true
+      return this.connector.reconnect()
+    } else {
+      return Promise.resolve()
+    }
+  }
+  destroy () {
+    var self = this
+    return this.close().then(function () {
+      if (self.db.deleteDB != null) {
+        return self.db.deleteDB()
+      } else {
+        return Promise.resolve()
+      }
+    }).then(() => {
+      // remove existing event listener
+      super.destroy()
+    })
+  }
+  close () {
+    var self = this
+    this.share = null
+    if (this.connector.destroy != null) {
+      this.connector.destroy()
+    } else {
+      this.connector.disconnect()
+    }
+    return this.db.whenTransactionsFinished().then(function () {
+      self.db.destroyTypes()
+      // make sure to wait for all transactions before destroying the db
+      self.db.requestTransaction(function * () {
+        yield * self.db.destroy()
+      })
+      return self.db.whenTransactionsFinished()
+    })
+  }
+}

test/TestSuite.coffee

@@ -1,219 +0,0 @@
-chai      = require('chai')
-expect    = chai.expect
-sinon     = require('sinon')
-sinonChai = require('sinon-chai')
-_         = require("underscore")
-
-chai.use(sinonChai)
-
-Connector = require "../../y-test/lib/y-test.coffee"
-Y = null # need global reference!
-
-module.exports = class Test
-  constructor: (@name_suffix = "", Yjs)->
-    Y = Yjs
-    @number_of_test_cases_multiplier = 1
-    @repeat_this = 1 * @number_of_test_cases_multiplier
-    @doSomething_amount = 123 * @number_of_test_cases_multiplier
-    @number_of_engines = 5 + @number_of_test_cases_multiplier - 1
-
-    @time = 0 # denotes to the time when run was started
-    @ops = 0 # number of operations (used with @time)
-    @time_now = 0 # current time
-    @max_depth = 3
-
-    @debug = false
-
-    @reinitialize()
-    for gf in @getGeneratingFunctions(0)
-      if not (gf.types? and gf.f?)
-        throw new Error "Generating Functions are not initialized properly!"
-      for t in gf.types
-        if not t?
-          throw new Error "You havent includedt this type in Y (do require 'y-whatever')"
-
-  reinitialize: ()->
-    @users = []
-    for i in [0...@number_of_engines]
-      u = @makeNewUser (i+@name_suffix)
-      for user in @users
-        u._model.connector.join(user._model.connector) # TODO: change the test-connector to make this more convenient
-      @users.push u
-    @initUsers?(@users[0])
-    @flushAll()
-
-  # is called by implementing class
-  makeNewUser: (user)->
-    user._model.HB.stopGarbageCollection()
-    user
-
-  getSomeUser: ()->
-    i = _.random 0, (@users.length-1)
-    @users[i]
-
-  getRandomText: (chars, min_length = 0)->
-    chars ?= "abcdefghijklmnopqrstuvwxyz"
-    length = _.random min_length, 10
-    #length = 1
-    nextchar = chars[(_.random 0, (chars.length-1))]
-    text = ""
-    _(length).times ()-> text += nextchar
-    text
-
-  getRandomObject: ()->
-    result = {}
-    key1 = @getRandomKey()
-    key2 = @getRandomKey()
-    val1 = @getRandomText()
-    val2 = null
-    if _.random(0,1) is 1
-      val2 = @getRandomObject()
-    else
-      val2 = @getRandomText()
-    result[key1] = val1
-    result[key2] = val2
-    result
-
-  getRandomKey: ()->
-    @getRandomText [1,2,'x','y'], 1 # only 4 keys
-
-  getGeneratingFunctions: (user_num)=>
-    types = @users[user_num]._model.operations
-    []
-  getRandomRoot: (user_num)->
-    throw new Error "implement me!"
-
-  compare: (o1, o2, depth = (@max_depth+1))->
-    if o1 is o2 or depth <= 0
-      true
-    else if o1._name? and o1._name isnt o2._name
-      throw new Error "different types"
-    else if o1._model?
-      @compare o1._model, o2._model, depth
-    else if o1.type is "MapManager"
-      for name, val of o1.val()
-        @compare(val, o2.val(name), depth-1)
-    else if o1.type is "ListManager"
-      for val,i in o1.val()
-        @compare(val, o2.val(i), depth-1)
-    else if o1.constructor is Array and o2.constructor is Array
-      if o1.length isnt o2.length
-        throw new Error "The Arrays do not have the same size!"
-      for o,i in o1
-        @compare o, o2[i], (depth-1)
-    else if o1 isnt o2
-      throw new Error "different values"
-    else
-      throw new Error "I don't know what to do .. "
-
-  generateRandomOp: (user_num)=>
-    y = @getRandomRoot(user_num)
-    choices = @getGeneratingFunctions(user_num).filter (gf)->
-      _.some gf.types, (type)->
-        y instanceof type
-
-    if choices.length is 0
-      console.dir(y)
-      throw new Error "You forgot to specify a test generation methot for this Operation! (#{y.type})"
-    i = _.random 0, (choices.length-1)
-    choices[i].f y
-
-  applyRandomOp: (user_num)=>
-    user = @users[user_num]
-    user._model.connector.flushOneRandom()
-
-  doSomething: ()->
-    user_num = _.random (@number_of_engines-1)
-    choices = [@applyRandomOp, @generateRandomOp]
-    choice = _.random (choices.length-1)
-    choices[choice](user_num)
-
-  flushAll: (final)->
-    # TODO:!!
-    final = false
-    if @users.length <= 1 or not final
-      for user,user_number in @users
-        user._model.connector.flushAll()
-    else
-      for user,user_number in @users[1..]
-        user._model.connector.flushAll()
-      ops = @users[1].getHistoryBuffer()._encode @users[0].HB.getOperationCounter()
-      @users[0].engine.applyOpsCheckDouble ops
-
-
-  compareAll: (test_number)->
-    @flushAll(true)
-
-    @time += (new Date()).getTime() - @time_now
-
-    number_of_created_operations = 0
-    for i in [0...(@users.length)]
-      number_of_created_operations += @users[i]._model.connector.getOpsInExecutionOrder().length
-    @ops += number_of_created_operations*@users.length
-
-    ops_per_msek = Math.floor(@ops/@time)
-    if test_number? # and @debug
-      console.log "#{test_number}/#{@repeat_this}: #{number_of_created_operations} were created and applied on (#{@users.length}) users ops in a different order." + " Over all we consumed #{@ops} operations in #{@time/1000} seconds (#{ops_per_msek} ops/msek)."
-
-    for i in [0...(@users.length-1)]
-      if @debug
-        if not _.isEqual @getContent(i), @getContent(i+1)
-          printOpsInExecutionOrder = (otnumber, otherotnumber)=>
-            ops = _.filter @users[otnumber]._model.connector.getOpsInExecutionOrder(), (o)->
-              typeof o.uid.op_name isnt 'string' and o.uid.creator isnt '_'
-            for s,j in ops
-              console.log "op#{j} = " + (JSON.stringify s)
-            console.log ""
-            s = "ops = ["
-            for o,j in ops
-              if j isnt 0
-                s += ", "
-              s += "op#{j}"
-            s += "]"
-            console.log s
-            console.log "@test_user.engine.applyOps ops"
-            console.log "expect(@test_user.val('name').val()).to.equal(\"#{@users[otherotnumber].val('name').val()}\")"
-            ops
-          console.log ""
-          console.log "Found an OT Puzzle!"
-          console.log "OT states:"
-          for u,j in @users
-            console.log "OT#{j}: "+u.val('name').val()
-          console.log "\nOT execution order (#{i},#{i+1}):"
-          printOpsInExecutionOrder i, i+1
-          console.log ""
-          ops = printOpsInExecutionOrder i+1, i
-
-          console.log ""
-      expect(@compare(@users[i], @users[i+1])).to.not.be.undefined
-
-  run: ()->
-    if @debug
-      console.log ''
-    for times in [1..@repeat_this]
-      @time_now = (new Date).getTime()
-      for i in [1..Math.floor(@doSomething_amount/2)]
-        @doSomething()
-      @flushAll(false)
-      for u in @users
-        u._model.HB.emptyGarbage()
-      for i in [1..Math.floor(@doSomething_amount/2)]
-        @doSomething()
-
-      @compareAll(times)
-      @testHBencoding()
-      if times isnt @repeat_this
-        @reinitialize()
-
-  testHBencoding: ()->
-    # in case of JsonFramework, every user will create its JSON first! therefore, the testusers id must be small than all the others (see InsertType)
-    @users[@users.length] = @makeNewUser (-1) # this does not want to join with anymody
-
-    @users[@users.length-1]._model.HB.renewStateVector @users[0]._model.HB.getOperationCounter()
-    @users[@users.length-1]._model.engine.applyOps @users[0]._model.HB._encode()
-
-    #if @getContent(@users.length-1) isnt @getContent(0)
-    #  console.log "testHBencoding:"
-    #  console.log "Unprocessed ops first: #{@users[0].engine.unprocessed_ops.length}"
-    #  console.log "Unprocessed ops last: #{@users[@users.length-1].engine.unprocessed_ops.length}"
-    expect(@compare(@users[@users.length-1], @users[0])).to.not.be.undefined

test/object-test.coffee

@@ -1,324 +0,0 @@
-chai      = require('chai')
-expect    = chai.expect
-should    = chai.should()
-sinon     = require('sinon')
-sinonChai = require('sinon-chai')
-_         = require("underscore")
-
-chai.use(sinonChai)
-
-Y = require "../lib/y.coffee"
-Y.Test = require "../../y-test/lib/y-test.coffee"
-Y.Text = require "../../y-text/lib/y-text"
-Y.List = require "../../y-list/lib/y-list"
-
-TestSuite = require "./TestSuite"
-class ObjectTest extends TestSuite
-
-  constructor: (suffix)->
-    super suffix, Y
-
-  makeNewUser: (userId)->
-    conn = new Y.Test userId
-    super new Y conn
-
-  type: "ObjectTest"
-
-  getRandomRoot: (user_num, root, depth = @max_depth)->
-    root ?= @users[user_num]
-    if depth is 0 or _.random(0,1) is 1 # take root
-      root
-    else # take child
-      depth--
-      elems = null
-      if root._name is "Object"
-        elems =
-          for oname,val of root.val()
-            val
-      else if root._name is "Array"
-        elems = root.val()
-      else
-        return root
-
-      elems = elems.filter (elem)->
-        elem? and ((elem._name is "Array") or (elem._name is "Object"))
-      if elems.length is 0
-        root
-      else
-        p = elems[_.random(0, elems.length-1)]
-        @getRandomRoot user_num, p, depth
-
-  getGeneratingFunctions: (user_num)->
-    super(user_num).concat [
-        f : (y)=> # Delete Object Property
-          list = for name, o of y.val()
-            name
-          if list.length > 0
-            key = list[_.random(0,list.length-1)]
-            y.delete(key)
-        types: [Y.Object]
-      ,
-        f : (y)=> # SET Object Property
-          y.val(@getRandomKey(), new Y.Object(@getRandomObject()))
-        types: [Y.Object]
-      ,
-        f : (y)=> # SET PROPERTY TEXT
-          y.val(@getRandomKey(), new Y.Text(@getRandomText()))
-        types: [Y.Object]
-      ,
-        f : (y)=> # SET PROPERTY List
-          y.val(@getRandomKey(), new Y.List(@getRandomText().split("")))
-        types: [Y.Object]
-      ,
-        f : (y)=> # Delete Array Element
-          list = y.val()
-          if list.length > 0
-            i = _.random(0,list.length-1)
-            y.delete(i)
-        types: [Y.List]
-      ,
-        f : (y)=> # insert Object mutable
-          l = y.val().length
-          y.insert(_.random(0, l-1), new Y.Object(@getRandomObject()))
-        types: [Y.List]
-      ,
-        f : (y)=> # insert Text mutable
-          l = y.val().length
-          y.insert(_.random(0, l-1), new Y.Text(@getRandomText()))
-        types : [Y.List]
-      ,
-        f : (y)=> # insert List mutable
-          l = y.val().length
-          y.insert(_.random(0, l-1), new Y.List(@getRandomText().split("")))
-        types : [Y.List]
-      ,
-        f : (y)=> # insert Number (primitive object)
-          l = y.val().length
-          y.insert(_.random(0,l-1), _.random(0,42))
-        types : [Y.List]
-      ,
-        f : (y)=> # SET Object Property (circular)
-          y.val(@getRandomKey(), @getRandomRoot user_num)
-        types: [Y.Object]
-      ,
-        f : (y)=> # insert Object mutable (circular)
-          l = y.val().length
-          y.insert(_.random(0, l-1), @getRandomRoot user_num)
-        types: [Y.List]
-      ,
-        f : (y)=> # INSERT TEXT
-          y
-          pos = _.random 0, (y.val().length-1)
-          y.insert pos, @getRandomText()
-          null
-        types: [Y.Text]
-      ,
-        f : (y)-> # DELETE TEXT
-          if y.val().length > 0
-            pos = _.random 0, (y.val().length-1) # TODO: put here also arbitrary number (test behaviour in error cases)
-            length = _.random 0, (y.val().length - pos)
-            ops1 = y.delete pos, length
-          undefined
-        types : [Y.Text]
-      ]
-
-module.exports = ObjectTest
-
-describe "Object Test", ->
-  @timeout 500000
-
-  beforeEach (done)->
-    @yTest = new ObjectTest()
-    @users = @yTest.users
-
-    @test_user = @yTest.makeNewUser "test_user"
-    done()
-
-  it "can handle many engines, many operations, concurrently (random)", ->
-    console.log "" # TODO
-    @yTest.run()
-
-  it "has a working test suite", ->
-    @yTest.compareAll()
-
-  it "handles double-late-join", ->
-    test = new ObjectTest("double")
-    test.run()
-    @yTest.run()
-    u1 = test.users[0]
-    u2 = @yTest.users[1]
-    ops1 = u1._model.HB._encode()
-    ops2 = u2._model.HB._encode()
-    u1._model.engine.applyOp ops2, true
-    u2._model.engine.applyOp ops1, true
-
-    expect(@yTest.compare(u1, u2)).to.not.be.undefined
-
-  it "can handle creaton of complex json (1)", ->
-    @yTest.users[0].val('a', new Y.Text('q'))
-    @yTest.users[1].val('a', new Y.Text('t'))
-    @yTest.compareAll()
-    q = @yTest.users[2].val('a')
-    q.insert(0,'A')
-    @yTest.compareAll()
-    expect(@yTest.getSomeUser().val("a").val()).to.equal("At")
-
-  it "can handle creaton of complex json (2)", ->
-    @yTest.getSomeUser().val('x', new Y.Object({'a':'b'}))
-    @yTest.getSomeUser().val('a', new Y.Object({'a':{q: new Y.Text("dtrndtrtdrntdrnrtdnrtdnrtdnrtdnrdnrdt")}}))
-    @yTest.getSomeUser().val('b', new Y.Object({'a':{}}))
-    @yTest.getSomeUser().val('c', new Y.Object({'a':'c'}))
-    @yTest.getSomeUser().val('c', new Y.Object({'a':'b'}))
-    @yTest.compareAll()
-    q = @yTest.getSomeUser().val("a").val("a").val("q")
-    q.insert(0,'A')
-    @yTest.compareAll()
-    expect(@yTest.getSomeUser().val("a").val("a").val("q").val()).to.equal("Adtrndtrtdrntdrnrtdnrtdnrtdnrtdnrdnrdt")
-
-  it "can handle creaton of complex json (3)", ->
-    @yTest.users[0].val('l', new Y.List([1,2,3]))
-    @yTest.users[1].val('l', new Y.List([4,5,6]))
-    @yTest.compareAll()
-    @yTest.users[2].val('l').insert(0,'A')
-    w = @yTest.users[1].val('l').insert(0,new Y.Text('B')).val(0)
-    w.insert 1, "C"
-    expect(w.val()).to.equal("BC")
-    @yTest.compareAll()
-
-  it "handles immutables and primitive data types", ->
-    @yTest.getSomeUser().val('string', "text")
-    @yTest.getSomeUser().val('number', 4)
-    @yTest.getSomeUser().val('object', new Y.Object({q:"rr"}))
-    @yTest.getSomeUser().val('null', null)
-    @yTest.compareAll()
-    expect(@yTest.getSomeUser().val('string')).to.equal "text"
-    expect(@yTest.getSomeUser().val('number')).to.equal 4
-    expect(@yTest.getSomeUser().val('object').val('q')).to.equal "rr"
-    expect(@yTest.getSomeUser().val('null') is null).to.be.ok
-
-  it "handles immutables and primitive data types (2)", ->
-    @yTest.users[0].val('string', "text")
-    @yTest.users[1].val('number', 4)
-    @yTest.users[2].val('object', new Y.Object({q:"rr"}))
-    @yTest.users[0].val('null', null)
-    @yTest.compareAll()
-    expect(@yTest.getSomeUser().val('string')).to.equal "text"
-    expect(@yTest.getSomeUser().val('number')).to.equal 4
-    expect(@yTest.getSomeUser().val('object').val('q')).to.equal "rr"
-    expect(@yTest.getSomeUser().val('null') is null).to.be.ok
-
-  it "Observers work on JSON Types (add type observers, local and foreign)", ->
-    u = @yTest.users[0]
-    @yTest.flushAll()
-    last_task = null
-    observer1 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("add")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('0')
-      expect(change.name).to.equal("newStuff")
-      last_task = "observer1"
-    u.observe observer1
-    u.val("newStuff",new Y.Text("someStuff"))
-    expect(last_task).to.equal("observer1")
-    u.unobserve observer1
-
-    observer2 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("add")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('1')
-      expect(change.name).to.equal("moreStuff")
-      last_task = "observer2"
-    u.observe observer2
-    v = @yTest.users[1]
-    v.val("moreStuff","someMoreStuff")
-    @yTest.flushAll()
-    expect(last_task).to.equal("observer2")
-    u.unobserve observer2
-
-  it "Observers work on JSON Types (update type observers, local and foreign)", ->
-    u = @yTest.users[0].val("newStuff", new Y.Text("oldStuff")).val("moreStuff",new Y.Text("moreOldStuff"))
-    @yTest.flushAll()
-    last_task = null
-    observer1 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("update")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('0')
-      expect(change.name).to.equal("newStuff")
-      expect(change.oldValue.val()).to.equal("oldStuff")
-      last_task = "observer1"
-    u.observe observer1
-    u.val("newStuff","someStuff")
-    expect(last_task).to.equal("observer1")
-    u.unobserve observer1
-
-    observer2 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("update")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('1')
-      expect(change.name).to.equal("moreStuff")
-      expect(change.oldValue.val()).to.equal("moreOldStuff")
-      last_task = "observer2"
-    u.observe observer2
-    v = @yTest.users[1]
-    v.val("moreStuff","someMoreStuff")
-    @yTest.flushAll()
-    expect(last_task).to.equal("observer2")
-    u.unobserve observer2
-
-
-  it "Observers work on JSON Types (delete type observers, local and foreign)", ->
-    u = @yTest.users[0].val("newStuff",new Y.Text("oldStuff")).val("moreStuff",new Y.Text("moreOldStuff"))
-    @yTest.flushAll()
-    last_task = null
-    observer1 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("delete")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('0')
-      expect(change.name).to.equal("newStuff")
-      expect(change.oldValue.val()).to.equal("oldStuff")
-      last_task = "observer1"
-    u.observe observer1
-    u.delete("newStuff")
-    expect(last_task).to.equal("observer1")
-    u.unobserve observer1
-
-    observer2 = (changes)->
-      expect(changes.length).to.equal(1)
-      change = changes[0]
-      expect(change.type).to.equal("delete")
-      expect(change.object).to.equal(u)
-      expect(change.changedBy).to.equal('1')
-      expect(change.name).to.equal("moreStuff")
-      expect(change.oldValue.val()).to.equal("moreOldStuff")
-      last_task = "observer2"
-    u.observe observer2
-    v = @yTest.users[1]
-    v.delete("moreStuff")
-    @yTest.flushAll()
-    expect(last_task).to.equal("observer2")
-    u.unobserve observer2
-
-  it "can handle circular JSON", ->
-    u = @yTest.users[0]
-    u.val("me", u)
-    @yTest.compareAll()
-    u.val("stuff", new Y.Object({x: true}))
-    u.val("same_stuff", u.val("stuff"))
-    u.val("same_stuff").val("x", 5)
-    expect(u.val("same_stuff").val("x")).to.equal(5)
-    @yTest.compareAll()
-    u.val("stuff").val("y", u.val("stuff"))
-    @yTest.compareAll()
-
-
-

tests-lib/helper.js

@@ -0,0 +1,191 @@
+
+import _Y from '../../yjs/src/y.js'
+
+import yMemory from '../../y-memory/src/y-memory.js'
+import yArray from '../../y-array/src/y-array.js'
+import yMap from '../../y-map/src/Map.js'
+import yTest from './test-connector.js'
+
+import Chance from 'chance'
+
+export let Y = _Y
+
+Y.extend(yMemory, yArray, yMap, yTest)
+
+export async function garbageCollectUsers (t, users) {
+  await flushAll(t, users)
+  await Promise.all(users.map(u => u.db.emptyGarbageCollector()))
+}
+
+/*
+ * 1. reconnect and flush all
+ * 2. user 0 gc
+ * 3. get type content
+ * 4. disconnect & reconnect all (so gc is propagated)
+ * 5. compare os, ds, ss
+ */
+export async function compareUsers (t, users) {
+  await Promise.all(users.map(u => u.reconnect()))
+  if (users[0].connector.testRoom == null) {
+    await wait(100)
+  }
+  await flushAll(t, users)
+  await wait()
+  await flushAll(t, users)
+
+  var userTypeContents = users.map(u => u.share.array._content.map(c => c.val || JSON.stringify(c.type)))
+
+  await users[0].db.garbageCollect()
+  await users[0].db.garbageCollect()
+
+  // disconnect all except user 0
+  await Promise.all(users.slice(1).map(async u =>
+    u.disconnect()
+  ))
+  if (users[0].connector.testRoom == null) {
+    await wait(100)
+  }
+  // reconnect all
+  await Promise.all(users.map(u => u.reconnect()))
+  if (users[0].connector.testRoom == null) {
+    await wait(100)
+  }
+  await users[0].connector.testRoom.flushAll(users)
+  await Promise.all(users.map(u =>
+    new Promise(function (resolve) {
+      u.connector.whenSynced(resolve)
+    })
+  ))
+  let filterDeletedOps = users.every(u => u.db.gc === false)
+  var data = await Promise.all(users.map(async (u) => {
+    var data = {}
+    u.db.requestTransaction(function * () {
+      var os = yield * this.getOperationsUntransformed()
+      data.os = {}
+      for (let i = 0; i < os.untransformed.length; i++) {
+        let op = os.untransformed[i]
+        op = Y.Struct[op.struct].encode(op)
+        delete op.origin
+        /*
+          If gc = false, it is necessary to filter deleted ops
+          as they might have been split up differently..
+         */
+        if (filterDeletedOps) {
+          let opIsDeleted = yield * this.isDeleted(op.id)
+          if (!opIsDeleted) {
+            data.os[JSON.stringify(op.id)] = op
+          }
+        } else {
+          data.os[JSON.stringify(op.id)] = op
+        }
+      }
+      data.ds = yield * this.getDeleteSet()
+      data.ss = yield * this.getStateSet()
+    })
+    await u.db.whenTransactionsFinished()
+    return data
+  }))
+  for (var i = 0; i < data.length - 1; i++) {
+    await t.asyncGroup(async () => {
+      t.compare(userTypeContents[i], userTypeContents[i + 1], 'types')
+      t.compare(data[i].os, data[i + 1].os, 'os')
+      t.compare(data[i].ds, data[i + 1].ds, 'ds')
+      t.compare(data[i].ss, data[i + 1].ss, 'ss')
+    }, `Compare user${i} with user${i + 1}`)
+  }
+  await Promise.all(users.map(async (u) => {
+    await u.close()
+  }))
+}
+
+export async function initArrays (t, opts) {
+  var result = {
+    users: []
+  }
+  var share = Object.assign({ flushHelper: 'Map', array: 'Array' }, opts.share)
+  var chance = opts.chance || new Chance(t.getSeed() * 1000000000)
+  var connector = Object.assign({ room: 'debugging_' + t.name, testContext: t, chance }, opts.connector)
+  for (let i = 0; i < opts.users; i++) {
+    let dbOpts
+    let connOpts
+    if (i === 0) {
+      // Only one instance can gc!
+      dbOpts = Object.assign({ gc: true }, opts.db)
+      connOpts = Object.assign({ role: 'master' }, connector)
+    } else {
+      dbOpts = Object.assign({ gc: false }, opts.db)
+      connOpts = Object.assign({ role: 'slave' }, connector)
+    }
+    let y = await Y({
+      connector: connOpts,
+      db: dbOpts,
+      share: share
+    })
+    result.users.push(y)
+    for (let name in share) {
+      result[name + i] = y.share[name]
+    }
+  }
+  result.array0.delete(0, result.array0.length)
+  if (result.users[0].connector.testRoom != null) {
+    // flush for sync if test-connector
+    await result.users[0].connector.testRoom.flushAll(result.users)
+  }
+  await Promise.all(result.users.map(u => {
+    return new Promise(function (resolve) {
+      u.connector.whenSynced(resolve)
+    })
+  }))
+  await flushAll(t, result.users)
+  return result
+}
+
+export async function flushAll (t, users) {
+  // users = users.filter(u => u.connector.isSynced)
+  if (users.length === 0) {
+    return
+  }
+  await wait(0)
+  if (users[0].connector.testRoom != null) {
+    // use flushAll method specified in Test Connector
+    await users[0].connector.testRoom.flushAll(users)
+  } else {
+    // flush for any connector
+    await Promise.all(users.map(u => { return u.db.whenTransactionsFinished() }))
+
+    var flushCounter = users[0].share.flushHelper.get('0') || 0
+    flushCounter++
+    await Promise.all(users.map(async (u, i) => {
+      // wait for all users to set the flush counter to the same value
+      await new Promise(resolve => {
+        function observer () {
+          var allUsersReceivedUpdate = true
+          for (var i = 0; i < users.length; i++) {
+            if (u.share.flushHelper.get(i + '') !== flushCounter) {
+              allUsersReceivedUpdate = false
+              break
+            }
+          }
+          if (allUsersReceivedUpdate) {
+            resolve()
+          }
+        }
+        u.share.flushHelper.observe(observer)
+        u.share.flushHelper.set(i + '', flushCounter)
+      })
+    }))
+  }
+}
+
+export async function flushSome (t, users) {
+  if (users[0].connector.testRoom == null) {
+    // if not test-connector, wait for some time for operations to arrive
+    await wait(100)
+  }
+}
+
+export function wait (t) {
+  return new Promise(function (resolve) {
+    setTimeout(resolve, t != null ? t : 100)
+  })
+}

tests-lib/test-connector.js

@@ -0,0 +1,156 @@
+/* global Y */
+import { wait } from './helper.js'
+
+var rooms = {}
+
+export class TestRoom {
+  constructor (roomname) {
+    this.room = roomname
+    this.users = {}
+    this.nextUserId = 0
+  }
+  join (connector) {
+    if (connector.userId == null) {
+      connector.setUserId('' + (this.nextUserId++))
+    }
+    Object.keys(this.users).forEach(uid => {
+      let user = this.users[uid]
+      if (user.role === 'master' || connector.role === 'master') {
+        this.users[uid].userJoined(connector.userId, connector.role)
+        connector.userJoined(uid, this.users[uid].role)
+      }
+    })
+    this.users[connector.userId] = connector
+  }
+  leave (connector) {
+    delete this.users[connector.userId]
+    Object.keys(this.users).forEach(uid => {
+      this.users[uid].userLeft(connector.userId)
+    })
+  }
+  send (sender, receiver, m) {
+    m = JSON.parse(JSON.stringify(m))
+    var user = this.users[receiver]
+    if (user != null) {
+      user.receiveMessage(sender, m)
+    }
+  }
+  broadcast (sender, m) {
+    Object.keys(this.users).forEach(receiver => {
+      this.send(sender, receiver, m)
+    })
+  }
+  async flushAll (users) {
+    let flushing = true
+    let allUserIds = Object.keys(this.users)
+    if (users == null) {
+      users = allUserIds.map(id => this.users[id].y)
+    }
+    while (flushing) {
+      await wait(10)
+      let res = await Promise.all(allUserIds.map(id => this.users[id]._flushAll(users)))
+      flushing = res.some(status => status === 'flushing')
+    }
+  }
+}
+
+function getTestRoom (roomname) {
+  if (rooms[roomname] == null) {
+    rooms[roomname] = new TestRoom(roomname)
+  }
+  return rooms[roomname]
+}
+
+export default function extendTestConnector (Y) {
+  class TestConnector extends Y.AbstractConnector {
+    constructor (y, options) {
+      if (options === undefined) {
+        throw new Error('Options must not be undefined!')
+      }
+      if (options.room == null) {
+        throw new Error('You must define a room name!')
+      }
+      options.forwardAppliedOperations = options.role === 'master'
+      super(y, options)
+      this.options = options
+      this.room = options.room
+      this.chance = options.chance
+      this.testRoom = getTestRoom(this.room)
+      this.testRoom.join(this)
+    }
+    disconnect () {
+      this.testRoom.leave(this)
+      return super.disconnect()
+    }
+    reconnect () {
+      this.testRoom.join(this)
+      return super.reconnect()
+    }
+    send (uid, message) {
+      this.testRoom.send(this.userId, uid, message)
+    }
+    broadcast (message) {
+      this.testRoom.broadcast(this.userId, message)
+    }
+    async whenSynced (f) {
+      var synced = false
+      var periodicFlushTillSync = () => {
+        if (synced) {
+          f()
+        } else {
+          this.testRoom.flushAll([this.y]).then(function () {
+            setTimeout(periodicFlushTillSync, 10)
+          })
+        }
+      }
+      periodicFlushTillSync()
+      return super.whenSynced(function () {
+        synced = true
+      })
+    }
+    receiveMessage (sender, m) {
+      if (this.userId !== sender && this.connections[sender] != null) {
+        var buffer = this.connections[sender].buffer
+        if (buffer == null) {
+          buffer = this.connections[sender].buffer = []
+        }
+        buffer.push(m)
+        if (this.chance.bool({likelihood: 30})) {
+          // flush 1/2 with 30% chance
+          var flushLength = Math.round(buffer.length / 2)
+          buffer.splice(0, flushLength).forEach(m => {
+            super.receiveMessage(sender, m)
+          })
+        }
+      }
+    }
+    async _flushAll (flushUsers) {
+      if (flushUsers.some(u => u.connector.userId === this.userId)) {
+        // this one needs to sync with every other user
+        flushUsers = Object.keys(this.connections).map(id => this.testRoom.users[id].y)
+      }
+      var finished = []
+      for (let i = 0; i < flushUsers.length; i++) {
+        let userId = flushUsers[i].connector.userId
+        if (userId !== this.userId && this.connections[userId] != null) {
+          let buffer = this.connections[userId].buffer
+          if (buffer != null) {
+            var messages = buffer.splice(0)
+            for (let j = 0; j < messages.length; j++) {
+              let p = super.receiveMessage(userId, messages[j])
+              finished.push(p)
+            }
+          }
+        }
+      }
+      await Promise.all(finished)
+      await this.y.db.whenTransactionsFinished()
+      return finished.length > 0 ? 'flushing' : 'done'
+    }
+  }
+  Y.extend('test', TestConnector)
+}
+
+if (typeof Y !== 'undefined') {
+  extendTestConnector(Y)
+}

y-object.html

@@ -1,7 +0,0 @@
-
-<polymer-element name="y-object" hidden attributes="val connector y">
-</polymer-element>
-<polymer-element name="y-property" hidden attributes="val name y">
-</polymer-element>
-
-<script src="./y-object.js"></script>

y-object.js

@@ -1 +0,0 @@
-!function t(n,e,l){function i(a,h){if(!e[a]){if(!n[a]){var v="function"==typeof require&&require;if(!h&&v)return v(a,!0);if(r)return r(a,!0);throw new Error("Cannot find module '"+a+"'")}var s=e[a]={exports:{}};n[a][0].call(s.exports,function(t){var e=n[a][1][t];return i(e?e:t)},s,s.exports,t,n,e,l)}return e[a].exports}for(var r="function"==typeof require&&require,a=0;a<l.length;a++)i(l[a]);return i}({1:[function(){var t;t=function(t){var n,e,l,i;for(e=l=0,i=t.children.length;i>=0?i>l:l>i;e=i>=0?++l:--l)n=t.children.item(e),null!=n.name&&(n.val=t.val.val(n.name));return t.val.observe(function(l){var i,r,a,h,v;for(v=[],a=0,h=l.length;h>a;a++)i=l[a],null!=i.name?v.push(function(){var l,a,h;for(h=[],e=l=0,a=t.children.length;a>=0?a>l:l>a;e=a>=0?++l:--l)n=t.children.item(e),null!=n.name&&n.name===i.name?(r=t.val.val(n.name),n.val!==r?h.push(n.val=r):h.push(void 0)):h.push(void 0);return h}()):v.push(void 0);return v})},Polymer("y-object",{ready:function(){return null!=this.connector?(this.val=new Y(this.connector),t(this)):null!=this.val?t(this):void 0},valChanged:function(){return null!=this.val&&"Object"===this.val._name?t(this):void 0},connectorChanged:function(){return null==this.val?(this.val=new Y(this.connector),t(this)):void 0}}),Polymer("y-property",{ready:function(){return null!=this.val&&null!=this.name&&(this.val.constructor===Object?this.val=this.parentElement.val(this.name,new Y.Object(this.val)).val(this.name):"string"==typeof this.val&&this.parentElement.val(this.name,this.val),"Object"===this.val._name)?t(this):void 0},valChanged:function(){var n;if(null!=this.val&&null!=this.name){if(this.val.constructor===Object)return this.val=this.parentElement.val.val(this.name,new Y.Object(this.val)).val(this.name);if("Object"===this.val._name)return t(this);if(null!=(null!=(n=this.parentElement.val)?n.val:void 0)&&this.val!==this.parentElement.val.val(this.name))return this.parentElement.val.val(this.name,this.val)}}})},{}]},{},[1]);