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@overload createPeerJsConnector peerjs_options, callback\n# @param {Object} peerjs_options Is the options object that is passed to PeerJs.\n# @param {Function} callback The callback is called when the connector is initialized.\n# @overload createPeerJsConnector peerjs_user_id, peerjs_options, callback\n# @param {String} peerjs_user_id The user_id that is passed to PeerJs as the user_id and should be unique between all (also the unconnected) Peers.\n# @param {Object} peerjs_options Is the options object that is passed to PeerJs.\n# @param {Function} callback The callback is called when the connector is initialized.\n#\ncreatePeerJsConnector = ()->\n peer = null\n if arguments.length is 2\n peer = new Peer arguments[0]\n callback = arguments[1]\n else\n peer = new Peer arguments[0], arguments[1]\n peer.on 'error', (err)->\n throw new Error \"Peerjs connector: #{err}\"\n peer.on 'disconnected', ()->\n throw new Error \"Peerjs connector disconnected from signalling server. Cannot accept new connections. Not fatal, but not so good either..\"\n callback = arguments[2]\n\n\n #\n # 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 @new_connection_listeners = []\n\n @peer.on 'connection', (conn)=>\n @addConnection conn\n\n sync_every_collaborator = ()=>\n for conn_id, conn of @connections\n conn.send\n sync_state_vector: @HB.getOperationCounter()\n setInterval sync_every_collaborator, 4000\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\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 onNewConnection: (f)->\n @new_connection_listeners.push f\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 if not data.initialized\n conn.send\n conns: @getAllConnectionIds()\n @new_connection_listeners.map (f)->\n f(conn)\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.sync_state_vector?\n conn.send\n HB: @yatta.getHistoryBuffer()._encode(data.sync_state_vector)\n initialized: true\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: false\n initialized_him = true\n else\n throw new Error \"Can't parse this operation: #{data}\"\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"]} |