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'use strict';
/*
* Dependencies
*/
var EventEmitter = require('events').EventEmitter;
var Namespace = require('./namespace');
var Callbacks = require('./callbacks');
var Room = require('./room');
var inherits = require('./util').inherits;
var Broadcast = require('./broadcast').init(Room);
var handle = require('./handle');
var Message = require('./message');
/*
* Socket Constructor
*
* - [socket] (object) : socket to send and receive messages over
* - [handle] (string|object) : socket interface
*/
var Socket = function Socket (socket, handle) {
Socket.__super__.call(this);
// public properties
this.rooms = [];
this.broadcast = Broadcast.bind(this);
// private properties
this._namespaces = {};
this._callbacks = new Callbacks(this.namespace('socket'));
this._message = new Message(this._callbacks);
this.join('all');
// Set up socket and handle
if (socket) this.connect(socket, handle);
};
/*
* Inherit from EventEmitter
*/
inherits(Socket, EventEmitter);
Socket.prototype._emit = EventEmitter.prototype.emit;
/*
* (Static) All
*/
Socket.all = Room.get('all');
/*
* (Static) In
*/
Socket.in = Room.get;
/*
* (Static) Rooms
*/
Socket.rooms = Room.rooms;
/*
* (Private) Process
* Processes messages received on the socket
*
* - data (string)
*/
Socket.prototype._process = function _process (data) {
var message = this._message.parse(data);
var details = Namespace.parse(message.event);
var arg1 = message.arg1;
var arg2 = message.arg2;
var arg3 = message.arg3;
var event = details.event;
var namespace = details.namespace;
var ns = this._namespaces[namespace];
if (namespace && ns) {
ns._emit(event, arg1, arg2, arg3);
}
this._emit(message.event, arg1, arg2, arg3);
};
/*
* (Private) Handle With
*
* - name (string|object) : the name of a handler, or a handler
*/
Socket.prototype._handleWith = function _handleWith (name) {
this._handle = handle(name);
};
/*
* Connect
* Connect to a socket
*
* - socket (Object)
*/
Socket.prototype.connect = function connect (socket, handle) {
var self = this;
if (handle) this._handleWith(handle);
this.socket = socket;
this.id = this._handle.identify(socket);
this._handle.onread(this.socket, function handleOnRead (message) {
self._process(message);
});
this._handle.onopen(this.socket, function handleOnOpen (event) {
self._emit('socket.open', event);
});
this._handle.onerror(this.socket, function handleOnError (event) {
self._emit('socket.error', event);
});
this._handle.onclose(this.socket, function handleOnClose (status, message) {
self.disconnect();
self._emit('socket.close', status, message);
});
};
/*
* Disconnnect
* The opposite of `connect`.
*
* Remove the socket from any rooms it is in.
* Also release control of the socket.
*/
Socket.prototype.disconnect = function disconnect () {
this._handle.release(this.socket);
var len = this.rooms.length;
for (var i = len - 1; i >= 0; i--) {
this.leave(this.rooms[i]);
}
};
/*
* Namespace
* If the namespace already exists it will be used instead
*
* - name (string)
* > namespace
*/
Socket.prototype.namespace = function namespace (name) {
var ns = this._namespaces[name];
ns = ns ? ns : this._namespaces[name] = new Namespace(name, this);
return ns;
};
/*
* Send a message through the socket
*
* - event (string)
* - args... (mixed) : any data you want to send
*/
Socket.prototype.emit = function emit (event, arg1, arg2, arg3) {
if (event === 'newListener' || event === 'removeListener') {
return this._emit(event, arg1, arg2, arg3);
}
var message = this._message.serialize(event, arg1, arg2, arg3);
this._handle.write(this.socket, message);
};
/*
* Join
*
* - room (string)
*/
Socket.prototype.join = function join (room) {
var index = this.rooms.indexOf(room);
if (index < 0) {
this.rooms.push(room);
room = Room.get(room);
room._join(this);
}
};
/*
* Leave
*
* - room (string)
*/
Socket.prototype.leave = function leave (room) {
var index = this.rooms.indexOf(room);
if (index > -1) {
this.rooms.splice(index, 1);
room = Room.get(room);
room._leave(this);
}
};
/*
* Room
*
* - name (string)
*/
Socket.prototype.room = Room.get;
/*
* Release
*
* Forget everything.
* TODO: Possibly overkill.
*/
Socket.prototype.release = function release () {
if (! this._message) return;
this.disconnect();
for (var key in this._namespaces) {
this._namespaces[key]._release();
}
this._callbacks.release();
this._message.release();
delete this._namespaces;
delete this._callbacks;
delete this._message;
delete this.socket;
delete this.broadcast;
delete this.rooms;
delete this.id;
delete this._handle;
};
module.exports = Socket;
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