dynamic html (integratable)

VQI_Observable.js

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+/*
+ * Class VQIObservable
+ * @author Pujan Joshi
+ * @Date April 21, 2014
+ * This is a generic Observable class
+ * This class has basic methods to deal with observers
+ * This class is also observer so it can subscribe to another obvervable class.
+ * 
+ */
+
+var VQI_Observable = function() {
+    this.subscribers = {
+        any: [] // event type: subscribers
+    };
+    this.subscribe = function(fn, type) {
+        type = type || 'any';
+        if (typeof this.subscribers[type] === "undefined") {
+            this.subscribers[type] = [];
+        }
+        this.subscribers[type].push(fn);
+    };
+    this.unsubscribe = function(fn, type) {
+        this.visitSubscribers('unsubscribe', fn, type);
+    };
+    this.publish = function(fn, type) {
+        this.visitSubscribers('publish', fn, type);
+    };
+    this.loading = function(fn, type) {
+        this.visitSubscribers('loading', fn, type);
+    };
+    this.visitSubscribers = function(action, fn, type) {
+        var pubtype = type || 'any';
+        var subscribers = this.subscribers[pubtype];
+        subscribers = subscribers || 0;
+        var i;
+        var max = subscribers.length;
+
+        for (i = 0; i < max; i += 1) {
+            if (action === 'publish') {
+//                console.log(this);
+                subscribers[i].update(fn, type);
+            } else if (action === 'loading') {
+
+                subscribers[i].loading();
+
+            } else {
+                if (subscribers[i] === fn) {
+                    subscribers.splice(i, 1);
+                }
+            }
+        }
+    };
+
+    this.subscribeTo = function(observable, type){
+        observable.subscribe(this, type);
+    };
+};