Bind task manager backbone app to websocket using autobahn

www/scripts/common/websockets/connection.js

@@ -0,0 +1,36 @@
+define([
+    "underscore"
+], function (_) {
+    return function (options) {
+        if (!"url" in options) {
+            throw "You must set the websocket 'url'"
+        }
+        if (!"topic" in options) {
+            throw "You must set the websocket 'topic'"
+        }
+        if (!"eventAggregator" in options) {
+            throw "You must set an event aggregator"
+        }
+
+        var eventAggregator = options.eventAggregator;
+
+        return {
+            run: function() {
+                // autobahn js is defined as a global object there is no way to load
+                // it as a UMD module
+                ab.connect(options.url, function (session) {
+                    eventAggregator.trigger("ws:connect", session);
+                    session.subscribe(options.topic, function (topic, msg) {
+                            // double encoded string
+                            var msg = JSON.parse(JSON.parse(msg));
+                            eventAggregator.trigger("ws:"+msg.event, msg, session);
+                        }
+                    );
+                },
+                function (code, reason) {
+                    eventAggregator.trigger("ws:session-gone", code,reason);
+                });
+            }
+        }
+    }
+});