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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 /**
      6  * @fileoverview
      7  * Class to communicate with the background scripts via chrome runtime
      8  * messages to
      9  * 1. Forward session state notifications
     10  * 2. Closes the window when the session terminates
     11  */
     12 
     13 'use strict';
     14 
     15 /** @suppress {duplicate} */
     16 var remoting = remoting || {};
     17 
     18 /**
     19  * @constructor
     20  * @param {string} senderId id of the current tab or window.
     21  */
     22 remoting.HangoutSession = function(senderId) {
     23   /**
     24    * @private
     25    * @type {chrome.runtime.Port}
     26    */
     27   this.port_ = null;
     28 
     29   /**
     30    * @private
     31    * @type {string}
     32    */
     33   this.senderId_ = senderId;
     34 };
     35 
     36 remoting.HangoutSession.prototype.init = function() {
     37   var portName = 'it2me.helper.webapp@' + this.senderId_;
     38   this.port_ = chrome.runtime.connect({name: portName});
     39 
     40   remoting.hangoutSessionEvents.addEventListener(
     41       remoting.hangoutSessionEvents.sessionStateChanged,
     42       this.onSessionStateChanged_.bind(this));
     43 };
     44 
     45 /**
     46  * @param {remoting.ClientSession.State} state
     47  */
     48 remoting.HangoutSession.prototype.onSessionStateChanged_ = function(state) {
     49   var State = remoting.ClientSession.State;
     50   try {
     51     this.port_.postMessage({method: 'sessionStateChanged', state: state});
     52   } catch (e) {
     53     // postMessage will throw an exception if the port is disconnected.
     54     // We can safely ignore this exception.
     55     var error = /** @type {Error} */ e;
     56     console.error(error);
     57   } finally {
     58     if (state === State.FAILED || state === State.CLOSED) {
     59       // close the current window
     60       if (base.isAppsV2()) {
     61         chrome.app.window.current().close();
     62       } else {
     63         window.close();
     64       }
     65     }
     66   }
     67 };
     68 
     69 
     70 /**
     71  * remoting.clientSession does not exist until the session is connected.
     72  * hangoutSessionEvents serves as a global event source to plumb session
     73  * state changes until we cleanup clientSession and sessionConnector.
     74  * @type {base.EventSource}
     75  */
     76 remoting.hangoutSessionEvents = new base.EventSource();
     77 
     78 /** @type {string} */
     79 remoting.hangoutSessionEvents.sessionStateChanged = "sessionStateChanged";
     80 
     81 remoting.hangoutSessionEvents.defineEvents(
     82     [remoting.hangoutSessionEvents.sessionStateChanged]);