Merge pull request websocket-rails#171 from lkol/master

Added a possibility to set channel success and failure callbacks on subs...

Author: DanKnox

lib/assets/javascripts/websocket_rails/channel.js.coffee

@@ -9,7 +9,7 @@ For instance:
 ###
 class WebSocketRails.Channel
 
-  constructor: (@name, @_dispatcher, @is_private) ->
+  constructor: (@name, @_dispatcher, @is_private, @on_success, @on_failure) ->
     if @is_private
       event_name = 'websocket_rails.subscribe_private'
     else
@@ -55,9 +55,9 @@ class WebSocketRails.Channel
         callback message
 
   # using this method because @on_success will not be defined when the constructor is executed
-  _success_launcher: (data) ->
+  _success_launcher: (data) =>
     @on_success(data) if @on_success?
 
   # using this method because @on_failure will not be defined when the constructor is executed
-  _failure_launcher: (data) ->
+  _failure_launcher: (data) =>
     @on_failure(data) if @on_failure?

lib/assets/javascripts/websocket_rails/websocket_rails.js.coffee

@@ -102,17 +102,17 @@ class @WebSocketRails
     for callback in @callbacks[event.name]
       callback event.data
 
-  subscribe: (channel_name) =>
+  subscribe: (channel_name, success_callback, failure_callback) =>
     unless @channels[channel_name]?
-      channel = new WebSocketRails.Channel channel_name, @
+      channel = new WebSocketRails.Channel channel_name, @, false, success_callback, failure_callback
       @channels[channel_name] = channel
       channel
     else
       @channels[channel_name]
 
-  subscribe_private: (channel_name) =>
+  subscribe_private: (channel_name, success_callback, failure_callback) =>
     unless @channels[channel_name]?
-      channel = new WebSocketRails.Channel channel_name, @, true
+      channel = new WebSocketRails.Channel channel_name, @, true, success_callback, failure_callback
       @channels[channel_name] = channel
       channel
     else