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gaia/apps/system/js/remote/message_controller.js

@@ -0,0 +1,66 @@
+/* global BaseModule, BroadcastChannel, Service */
+'use strict';
+
+(function(exports) {
+  function MessageController() {
+  }
+
+  // An empty EVENTS is necessary for triggering EventMixin in BaseModule.
+  MessageController.EVENTS = [
+  ];
+
+  BaseModule.create(MessageController, {
+    DEBUG: false,
+
+    name: 'MessageController',
+
+    postMessage: function(type, detail) {
+      this.debug('[#' + this.displayId + '] ' +
+        'broadcast message to local system: ' + type +
+        ', ' + JSON.stringify(detail));
+
+      this.broadcastChannel.postMessage({
+        source: this.displayId,
+        type: type,
+        detail: detail
+      });
+    },
+
+    _start: function() {
+      this.displayId = Service.query('displayId');
+
+      this.broadcastChannel = new BroadcastChannel('multiscreen');
+      this.broadcastChannel.addEventListener('message', this);
+    },
+
+    _stop: function() {
+      this.broadcastChannel.close();
+      this.broadcastChannel = null;
+    },
+
+    _handle_message: function(evt) {
+      var data = evt.data;
+      if (data.target !== this.displayId) {
+        return;
+      }
+      this.debug('[#' + this.displayId + '] ' +
+        'got message from local system: ' + data.type +
+        ', ' + JSON.stringify(data.detail));
+
+      switch(data.type) {
+        case 'launch-app':
+          Service.request('launchApp', data.detail).then(() => {
+            this.postMessage('launch-app-success', {
+              config: data.detail
+            });
+          }).catch((reason) => {
+            this.postMessage('launch-app-error', {
+              config: data.detail,
+              reason: reason
+            });
+          });
+          break;
+      }
+    }
+  });
+}(window));