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phpws.js
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phpws.js
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/**
* Created by Chris on 29-11-13.
*/
!function($){
function Emitter() {
this.callbacks = {};
}
Emitter.prototype.on = function(event, callback){
if(!(event in this.callbacks))
this.callbacks[event] = $.Callbacks();
this.callbacks[event].add(callback);
return this;
};
Emitter.prototype.removeListener = function(event, callback){
if(event in this.callbacks){
this.callbacks[event].remove.apply(this.callbacks[event], Array.prototype.slice.call(arguments, 1));
}
return this;
};
Emitter.prototype.once = function(event, callback){
var self = this;
var _once = function(){
callback();
self.removeListener(event, arguments.callee);
};
return this.on(event, _once);
};
Emitter.prototype.trigger = function(event, data){
if(event in this.callbacks){
this.callbacks[event].fireWith(this, Array.prototype.slice.call(arguments, 1));
}
return this;
};
function Client(){
Emitter.apply(this, arguments);
var self = this;
var ws = null;
var openPromise = $.Deferred();
var reconnectTimer = null;
this.connect = function(url, autoReconnect){
try {
ws = new WebSocket(url);
}catch(error){
console.log("Cannot create WebSocket instance");
return openPromise;
}
ws.addEventListener('open', function () {
openPromise.resolveWith(self);
self.trigger("open", arguments);
});
ws.addEventListener('close', function () {
openPromise.resolveWith(self);
self.trigger("close", arguments);
});
ws.addEventListener('error', function () {
openPromise.rejectWith(self);
self.trigger("error", arguments);
});
ws.addEventListener('message', function (event) {
self.trigger("message", [event.data]);
});
if (autoReconnect && !reconnectTimer) {
reconnectTimer = setInterval(
function () {
if (ws.readyState != WebSocket.OPEN)
self.connect(url);
},
5000
);
}
return openPromise;
};
this.whenConnected = function(callback, context){
this.on("open", function(){callback.call(context);});
if(ws && ws.readyState == WebSocket.OPEN){
callback.call(context);
}
};
this.send = function(data){
return ws.send(data);
};
this.close = function(){
return ws.close.apply(ws, arguments);
};
};
Client.prototype = new Emitter;
Client.prototype.constructor = Client;
function Room (client, transport, name){
Emitter.apply(this, arguments);
this.subscribed = true;
this.name = name;
this.transport = transport;
this.client = client;
}
Room.prototype = new Emitter;
Room.prototype.constructor = Room;
Room.prototype.on = function(event, callback){
// Subscribe if we haven't done that yet
if(!this.subscribed){
throw Error("Not subscribed to room " + this.name);
}
Emitter.prototype.on.apply(this, arguments);
return this;
};
Room.prototype.emit = function(event, data){
this.transport.emit(this.name, event, data);
return this;
};
Room.prototype.subscribe = function(){
var self = this;
this.subscribed = true;
this.client.whenConnected(function(){
console.log("Subscribing to room " + self.name);
self.transport.emit(self.name, "subscribe");
});
return this;
};
function EventTransport (client){
Emitter.apply(this, arguments);
var self = this;
var rooms = {};
var previousTag = 0;
var generateTag = function(){
previousTag += 1;
return "client-"+previousTag;
};
var sendObj = function(obj){
client.send(JSON.stringify(obj));
};
var addReply = function(obj){
obj.reply = function(data){
var msg = {
tag: obj.tag,
data: obj.data,
event: obj.event,
room: obj.room
};
sendObj(msg);
};
};
client.on("message", function(message){
var messageObj = JSON.parse(message);
addReply(messageObj);
self.trigger(messageObj.event, messageObj);
if('room' in messageObj){
self.room(messageObj.room).trigger(messageObj.event, messageObj);
}
});
this.room = function(name){
if(!(name in rooms))
rooms[name] = new Room(client, this, name);
return rooms[name];
};
this.emit = function(room, event, args){
var msg = {
room: room,
tag: generateTag(),
event: event,
data: args
};
sendObj(msg);
return this;
};
};
EventTransport.prototype = new Emitter;
EventTransport.prototype.constructor = EventTransport;
window.Phpws = {
Client: Client,
RemoteEvents: EventTransport
};
}(window.jQuery);