listenTo equivalents for Commands and Requests.

src/backbone.radio.js

@@ -233,6 +233,19 @@ Radio.Commands = {
   }
 };
 
+// listenTo equivalent for Commands
+var listenMethods = {complyFor: 'comply', complyForOnce: 'complyOnce'};
+_.each(listenMethods, function(implementation, method) {
+  Radio.Commands[method] = function(obj, name, callback) {
+    var listeningTo = this._listeningTo || (this._listeningTo = {});
+    var id = obj._listenId || (obj._listenId = _.uniqueId('c'));
+    listeningTo[id] = obj;
+    if (!callback && typeof name === 'object') { callback = this; }
+    obj[implementation](name, callback, this);
+    return this;
+  };
+});
+
 //
 // Backbone.Radio.Requests
 // A messaging system for requesting data.
@@ -322,6 +335,19 @@ Radio.Requests = {
   }
 };
 
+// listenTo equivalent for Requests
+var listenMethods = {replyFor: 'reply', replyForOnce: 'replyOnce'};
+_.each(listenMethods, function(implementation, method) {
+  Radio.Requests[method] = function(obj, name, callback) {
+    var listeningTo = this._listeningTo || (this._listeningTo = {});
+    var id = obj._listenId || (obj._listenId = _.uniqueId('r'));
+    listeningTo[id] = obj;
+    if (!callback && typeof name === 'object') { callback = this; }
+    obj[implementation](name, callback, this);
+    return this;
+  };
+});
+
 //
 // Backbone.Radio.channel
 // Get a reference to a channel by name.