1// Copyright (c) 2011 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#ifndef CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
6#define CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
7
8#include "base/memory/weak_ptr.h"
9#include "base/timer/timer.h"
10#include "chrome/browser/net/network_time_tracker.h"
11#include "chrome/browser/upgrade_detector.h"
12
13template <typename T> struct DefaultSingletonTraits;
14
15class UpgradeDetectorImpl : public UpgradeDetector {
16 public:
17  virtual ~UpgradeDetectorImpl();
18
19  // Returns the singleton instance.
20  static UpgradeDetectorImpl* GetInstance();
21
22 private:
23  friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
24
25  UpgradeDetectorImpl();
26
27  // Start the timer that will call |CheckForUpgrade()|.
28  void StartTimerForUpgradeCheck();
29
30  // Launches a task on the file thread to check if we have the latest version.
31  void CheckForUpgrade();
32
33  // Sends out a notification and starts a one shot timer to wait until
34  // notifying the user.
35  void UpgradeDetected(UpgradeAvailable upgrade_available);
36
37  // Returns true after calling UpgradeDetected if current install is outdated.
38  bool DetectOutdatedInstall();
39
40  // The function that sends out a notification (after a certain time has
41  // elapsed) that lets the rest of the UI know we should start notifying the
42  // user that a new version is available.
43  void NotifyOnUpgrade();
44
45  // Called on the FILE thread to detect an upgrade. Calls back UpgradeDetected
46  // on the UI thread if so. Although it looks weird, this needs to be a static
47  // method receiving a WeakPtr<> to this object so that we can interrupt
48  // the UpgradeDetected callback before it runs. Having this method non-static
49  // and using |this| directly wouldn't be thread safe. And keeping it as a
50  // non-class function would prevent it from calling UpgradeDetected.
51  static void DetectUpgradeTask(
52      base::WeakPtr<UpgradeDetectorImpl> upgrade_detector);
53
54  // We periodically check to see if Chrome has been upgraded.
55  base::RepeatingTimer<UpgradeDetectorImpl> detect_upgrade_timer_;
56
57  // After we detect an upgrade we start a recurring timer to see if enough time
58  // has passed and we should start notifying the user.
59  base::RepeatingTimer<UpgradeDetectorImpl> upgrade_notification_timer_;
60
61  // We use this factory to create callback tasks for UpgradeDetected. We pass
62  // the task to the actual upgrade detection code, which is in
63  // DetectUpgradeTask.
64  base::WeakPtrFactory<UpgradeDetectorImpl> weak_factory_;
65
66  // True if this build is a dev or canary channel build.
67  bool is_unstable_channel_;
68
69  // The date the binaries were built.
70  base::Time build_date_;
71
72  // Tracker for getting network time.
73  NetworkTimeTracker network_time_tracker_;
74
75  DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
76};
77
78
79#endif  // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
80