added flow support for everything except tests

declarations/Structs.js

@@ -16,9 +16,9 @@ type Operation = Struct
 
 type Insertion = {
   id: Id,
-  left: Id,
-  origin: Id,
-  right: Id,
+  left: ?Id,
+  origin: ?Id,
+  right: ?Id,
   parent: Id,
   parentSub: ?Id,
   opContent: ?Id,

src/Connector.js

@@ -1,7 +1,7 @@
 /* @flow */
 'use strict'
 
-module.exports = function (Y/* :YGlobal */) {
+module.exports = function (Y/* :any */) {
   class AbstractConnector {
     /* ::
     y: YConfig;

src/Database.js

@@ -1,7 +1,7 @@
 /* @flow */
 'use strict'
 
-module.exports = function (Y /* :YGlobal */) {
+module.exports = function (Y /* :any */) {
   /*
     Partial definition of an OperationStore.
     TODO: name it Database, operation store only holds operations.

src/Struct.js

@@ -19,7 +19,7 @@
  * requiredOps
      - Operations that are required to execute this operation.
 */
-module.exports = function (Y/* :YGlobal */) {
+module.exports = function (Y/* :any */) {
   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

src/Transaction.js

@@ -74,7 +74,7 @@
      - this is called only by `getOperations(startSS)`. It makes an operation
        applyable on a given SS.
 */
-module.exports = function (Y/* :YGlobal */) {
+module.exports = function (Y/* :any */) {
   class TransactionInterface {
     /* ::
     store: Y.AbstractDatabase;

src/Types/Map.js

@@ -1,7 +1,16 @@
+/* @flow */
 'use strict'
 
-module.exports = function (Y) {
+module.exports = function (Y /* :any */) {
   class YMap {
+    /* ::
+    _model: Id;
+    os: Y.AbstractDatabase;
+    map: Object;
+    contents: any;
+    opContents: Object;
+    eventHandler: Function;
+    */
     constructor (os, model, contents, opContents) {
       this._model = model.id
       this.os = os
@@ -22,7 +31,8 @@ module.exports = function (Y) {
             oldValue = () => {// eslint-disable-line
               return new Promise((resolve) => {
                 this.os.requestTransaction(function *() {// eslint-disable-line
-                  resolve(yield* this.getType(prevType))
+                  var type = yield* this.getType(prevType)
+                  resolve(type)
                 })
               })
             }
@@ -48,15 +58,20 @@ module.exports = function (Y) {
                 }
               }
               this.map[key] = op.id
-              var insertEvent = {
-                name: key,
-                object: this
-              }
+              var insertEvent
               if (oldValue === undefined) {
-                insertEvent.type = 'add'
+                insertEvent = {
+                  name: key,
+                  object: this,
+                  type: 'add'
+                }
               } else {
-                insertEvent.type = 'update'
-                insertEvent.oldValue = oldValue
+                insertEvent = {
+                  name: key,
+                  object: this,
+                  oldValue: oldValue,
+                  type: 'update'
+                }
               }
               userEvents.push(insertEvent)
             }
@@ -92,7 +107,8 @@ module.exports = function (Y) {
         return new Promise((resolve) => {
           var oid = this.opContents[key]
           this.os.requestTransaction(function *() {
-            resolve(yield* this.getType(oid))
+            var type = yield* this.getType(oid)
+            resolve(type)
           })
         })
       }
@@ -133,7 +149,7 @@ module.exports = function (Y) {
       // if not, apply immediately on this type an call event
 
       var right = this.map[key] || null
-      var insert = {
+      var insert /* :any */ = {
         left: null,
         right: right,
         origin: null,
@@ -236,7 +252,9 @@ module.exports = function (Y) {
           for (var e in events) {
             var event = events[e]
             if (event.name === path[0]) {
-              deleteChildObservers()
+              if (deleteChildObservers != null) {
+                deleteChildObservers()
+              }
               if (event.type === 'add' || event.type === 'update') {
                 resetObserverPath()
               }
@@ -248,8 +266,10 @@ module.exports = function (Y) {
         return resetObserverPath().then(
           // this promise contains a function that deletes all the child observers
           // and how to unobserve the observe from this object
-          Promise.resolve(function () {
-            deleteChildObservers()
+          new Promise.resolve(function () { // eslint-disable-line
+            if (deleteChildObservers != null) {
+              deleteChildObservers()
+            }
             self.unobserve(observer)
           })
         )

src/Utils.js

@@ -23,7 +23,7 @@
   database request to finish). EventHandler will help you to make your type
   synchronous.
 */
-module.exports = function (Y /* : YGlobal*/) {
+module.exports = function (Y /* : any*/) {
   Y.utils = {}
 
   class EventHandler {

src/y.js

@@ -1,3 +1,4 @@
+/* @flow */
 'use strict'
 
 require('./Connector.js')(Y)
@@ -55,7 +56,37 @@ function requestModules (modules) {
 
 require('./Types/Map.js')(Y)
 
-function Y (opts) {
+/* ::
+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 TypesOptions = Array<'array'|'map'|'text'>
+
+type YOptions = {
+  connector: ConnectionOptions,
+  db: DbOptions,
+  types: TypesOptions,
+  sourceDir: string
+}
+*/
+
+function Y (opts/* :YOptions */) /* :Promise<YConfig> */ {
   opts.types = opts.types != null ? opts.types : []
   var modules = [opts.db.name, opts.connector.name].concat(opts.types)
   Y.sourceDir = opts.sourceDir
@@ -71,6 +102,10 @@ function Y (opts) {
 }
 
 class YConfig {
+  /* ::
+  db: Y.AbstractDatabase;
+  connector: Y.AbstractConnector;
+  */
   constructor (opts, callback) {
     this.db = new Y[opts.db.name](this, opts.db)
     this.connector = new Y[opts.connector.name](this, opts.connector)