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assets/webapps/system.gaiamobile.org/shared/js/iac_handler.js

@@ -0,0 +1,49 @@
+'use strict';
+
+var IACHandler = {
+  _eventPrefix: 'iac-',
+  _ports: {},
+
+  init: function onInit() {
+    var self = this;
+
+    window.navigator.mozSetMessageHandler('connection',
+      function onConnected(request) {
+        var keyword = request.keyword;
+        var port = request.port;
+
+        // We will save each port by keyword; ports may get overwritten
+        // sometimes, but that's ok because there should only be one *active*
+        // port with a given keyword at any time.
+        self._ports[keyword] = port;
+
+        port.onmessage = function onReceivedMessage(evt) {
+          var message = evt.data;
+
+          /*
+           * System will emit a event when received message
+           * e.g. iac-ftucomms
+           *      iac-[keywords]
+           */
+          var evtName = self._eventPrefix + keyword;
+          var iacEvt = document.createEvent('CustomEvent');
+
+          /*
+           * You can get the message by accessing
+           * `event.detail`
+           *
+           * It will store the whole message you passed from postMessage
+           */
+          iacEvt.initCustomEvent(evtName,
+            /* canBubble: */ true, /* cancelable */ false, message);
+          window.dispatchEvent(iacEvt);
+        };
+    });
+  },
+
+  getPort: function(keyword) {
+    return this._ports[keyword];
+  }
+};
+
+IACHandler.init();