yjs/build/browser/Connectors/PeerJsConnector.js
2014-08-24 01:52:28 +02:00

133 lines
15 KiB
JavaScript

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var createPeerJsConnector;
createPeerJsConnector = function() {
var PeerJsConnector, callback, peer;
peer = null;
if (arguments.length === 2) {
peer = new Peer(arguments[0]);
callback = arguments[1];
} else {
peer = new Peer(arguments[0], arguments[1]);
callback = arguments[2];
}
PeerJsConnector = (function() {
function PeerJsConnector(engine, HB, execution_listener, yatta) {
var send_;
this.engine = engine;
this.HB = HB;
this.execution_listener = execution_listener;
this.yatta = yatta;
this.peer = peer;
this.connections = {};
this.peer.on('connection', (function(_this) {
return function(conn) {
return _this.addConnection(conn);
};
})(this));
send_ = (function(_this) {
return function(o) {
var conn, conn_id, _ref, _results;
if (o.uid.creator === _this.HB.getUserId() && (typeof o.uid.op_number !== "string")) {
_ref = _this.connections;
_results = [];
for (conn_id in _ref) {
conn = _ref[conn_id];
_results.push(conn.send({
op: o
}));
}
return _results;
}
};
})(this);
this.execution_listener.push(send_);
}
PeerJsConnector.prototype.connectToPeer = function(id) {
if ((this.connections[id] == null) && id !== this.yatta.getUserId()) {
return this.addConnection(peer.connect(id));
}
};
PeerJsConnector.prototype.getAllConnectionIds = function() {
var conn_id, _results;
_results = [];
for (conn_id in this.connections) {
_results.push(conn_id);
}
return _results;
};
PeerJsConnector.prototype.addConnection = function(conn) {
var initialized_him, initialized_me, sendStateVector;
this.connections[conn.peer] = conn;
initialized_me = false;
initialized_him = false;
conn.on('data', (function(_this) {
return function(data) {
var conn_id, _i, _len, _ref, _results;
if (data === "empty_message") {
} else if (data.HB != null) {
initialized_me = true;
_this.engine.applyOpsCheckDouble(data.HB);
return conn.send({
conns: _this.getAllConnectionIds()
});
} else if (data.op != null) {
return _this.engine.applyOp(data.op);
} else if (data.conns != null) {
_ref = data.conns;
_results = [];
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
conn_id = _ref[_i];
_results.push(_this.connectToPeer(conn_id));
}
return _results;
} else if (data.state_vector != null) {
if (!initialized_him) {
conn.send({
HB: _this.yatta.getHistoryBuffer()._encode(data.state_vector)
});
return initialized_him = true;
}
} else {
throw new Error("Can't parse this operation");
}
};
})(this));
sendStateVector = (function(_this) {
return function() {
conn.send({
state_vector: _this.HB.getOperationCounter()
});
if (!initialized_me) {
return setTimeout(sendStateVector, 100);
}
};
})(this);
return sendStateVector();
};
return PeerJsConnector;
})();
return peer.on('open', function(id) {
return callback(PeerJsConnector, id);
});
};
module.exports = createPeerJsConnector;
if (typeof window !== "undefined" && window !== null) {
if (window.Y == null) {
window.Y = {};
}
window.Y.createPeerJsConnector = createPeerJsConnector;
}
},{}]},{},[1])
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PeerJs is a Framework that enables you to connect to other peers. You just need the\n  # user-id of the peer (browser/client). And then you can connect to it.\n  # @see http://peerjs.com\n  #\n  class PeerJsConnector\n\n    #\n    # @param {Engine} engine The transformation engine\n    # @param {HistoryBuffer} HB\n    # @param {Array<Function>} execution_listener You must ensure that whenever an operation is executed, every function in this Array is called.\n    # @param {Yatta} yatta The Yatta framework.\n    #\n    constructor: (@engine, @HB, @execution_listener, @yatta)->\n\n      @peer = peer\n      @connections = {}\n\n      @peer.on 'connection', (conn)=>\n        @addConnection conn\n\n      send_ = (o)=>\n        if o.uid.creator is @HB.getUserId() and (typeof o.uid.op_number isnt \"string\")\n          for conn_id,conn of @connections\n            conn.send\n              op: o\n      @execution_listener.push send_\n\n    #\n    # Connect the Framework to another peer. Therefore you have to receive his\n    # user_id. If the other peer is connected to other peers, the PeerJsConnector\n    # will automatically connect to them too.\n    #\n    # Transmitting the user_id is your job.\n    # See [TextEditing](../../examples/TextEditing/) for a nice example\n    # on how to do that with urls.\n    #\n    # @param id {String} Connection id\n    #\n    connectToPeer: (id)->\n      if not @connections[id]? and id isnt @yatta.getUserId()\n        @addConnection peer.connect id\n\n    #\n    # Receive the id of every connected peer.\n    # @return {Array<String>} A list of Peer-Ids\n    #\n    getAllConnectionIds: ()->\n      for conn_id of @connections\n        conn_id\n\n    #\n    # Adds an existing connection to this connector.\n    # @param conn {PeerJsConnection}\n    #\n    addConnection: (conn)->\n      #\n      # What this method does:\n      # * Send state vector\n      # * Receive HB -> apply them\n      # * Send connections\n      # * Receive Connections -> Connect to unknow connections\n      @connections[conn.peer] = conn\n      initialized_me = false\n      initialized_him = false\n      conn.on 'data', (data)=>\n        if data is \"empty_message\"\n          # nop\n        else if data.HB?\n          initialized_me = true\n          @engine.applyOpsCheckDouble data.HB\n          conn.send\n            conns: @getAllConnectionIds()\n        else if data.op?\n          @engine.applyOp data.op\n        else if data.conns?\n          for conn_id in data.conns\n            @connectToPeer conn_id\n        else if data.state_vector?\n          if not initialized_him\n            # make sure, that it is sent only once\n            conn.send\n              HB: @yatta.getHistoryBuffer()._encode(data.state_vector)\n            initialized_him = true\n        else\n          throw new Error \"Can't parse this operation\"\n\n      sendStateVector = ()=>\n        conn.send\n          state_vector: @HB.getOperationCounter()\n        if not initialized_me\n          # Because of a bug in PeerJs,\n          # we never know if state vector was actually sent\n          setTimeout sendStateVector, 100\n      sendStateVector()\n\n  peer.on 'open', (id)->\n    callback PeerJsConnector, id\n\n\nmodule.exports = createPeerJsConnector\nif window?\n  if not window.Y?\n    window.Y = {}\n  window.Y.createPeerJsConnector = createPeerJsConnector\n\n"]}