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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} */
16var remoting = remoting || {};
17
18/**
19 * @constructor
20 * @param {string} senderId id of the current tab or window.
21 */
22remoting.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
36remoting.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 */
48remoting.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 */
76remoting.hangoutSessionEvents = new base.EventSource();
77
78/** @type {string} */
79remoting.hangoutSessionEvents.sessionStateChanged = "sessionStateChanged";
80
81remoting.hangoutSessionEvents.defineEvents(
82    [remoting.hangoutSessionEvents.sessionStateChanged]);