animation system update

src/game-lib-a-1-event.js

@@ -371,6 +371,23 @@ GameLib.Event.Emit = function(
     var count = 0;
 
     if (GameLib.Event.Subscriptions.hasOwnProperty(eventName)) {
+
+        if (GameLib.Event.Subscriptions[eventName].length === 0) {
+
+            if (clientCallback) {
+                /**
+                 * We execute the client callback immediately since there are no subscriptions to this event
+                 */
+                clientCallback();
+            }
+
+            if (clientErrorCallback) {
+                clientErrorCallback({
+                    message : 'No subscriptions for event ' + eventName
+                })
+            }
+        }
+
         GameLib.Event.Subscriptions[eventName].map(
             function(callback) {
                 if (callback) {

src/game-lib-system-animation.js

@@ -19,23 +19,47 @@ GameLib.System.Animation.prototype.start = function() {
 
     GameLib.System.prototype.start.call(this);
 
+    this.renderSubscriptions = [];
+
     this.animateSubscription = GameLib.Event.Subscribe(
         GameLib.Event.ANIMATE,
-        this.animate
+        this.animate.bind(this)
     );
 
+
 };
 
-GameLib.System.Animation.prototype.animate = function(data, clientCallback) {
+GameLib.System.Animation.prototype.animate = function(animationData, clientCallback) {
+
+    this.renderSubscriptions.push(
+
+        new GameLib.Event.Subscribe(
+
+            GameLib.Event.BEFORE_RENDER,
+
+            function(subscriptionIndex) {
+                return function(renderData) {
+
+                    if (
+                        clientCallback(
+                            {
+                                renderData : renderData,
+                                animationData : animationData
+                            }
+                        )
+                    ) {
+
+                        this.renderSubscriptions[subscriptionIndex].remove();
+
+                        animationData.done();
+                    }
+
+                }.bind(this);
+
+            }.bind(this)(this.renderSubscriptions.length)
+        )
+    );
 
-    this.renderSubscription = GameLib.Event.Subscribe(
-        GameLib.Event.BEFORE_RENDER,
-        function(data) {
-            if (clientCallback(data)) {
-                this.renderSubscription.remove();
-            }
-        }.bind(this)
-    )
 
 };