upgrade_detector_impl.h revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
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.h"
10#include "chrome/browser/upgrade_detector.h"
11
12template <typename T> struct DefaultSingletonTraits;
13
14class UpgradeDetectorImpl : public UpgradeDetector {
15 public:
16  virtual ~UpgradeDetectorImpl();
17
18  // Returns the singleton instance.
19  static UpgradeDetectorImpl* GetInstance();
20
21 private:
22  friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
23
24  UpgradeDetectorImpl();
25
26  // Start the timer that will call |CheckForUpgrade()|.
27  void StartTimerForUpgradeCheck();
28
29  // Launches a task on the file thread to check if we have the latest version.
30  void CheckForUpgrade();
31
32  // Sends out a notification and starts a one shot timer to wait until
33  // notifying the user.
34  void UpgradeDetected(UpgradeAvailable upgrade_available);
35
36  // Returns true after calling UpgradeDetected if current install is outdated.
37  bool DetectOutdatedInstall();
38
39  // The function that sends out a notification (after a certain time has
40  // elapsed) that lets the rest of the UI know we should start notifying the
41  // user that a new version is available.
42  void NotifyOnUpgrade();
43
44  // Called on the FILE thread to detect an upgrade. Calls back UpgradeDetected
45  // on the UI thread if so. Although it looks weird, this needs to be a static
46  // method receiving a WeakPtr<> to this object so that we can interrupt
47  // the UpgradeDetected callback before it runs. Having this method non-static
48  // and using |this| directly wouldn't be thread safe. And keeping it as a
49  // non-class function would prevent it from calling UpgradeDetected.
50  static void DetectUpgradeTask(
51      base::WeakPtr<UpgradeDetectorImpl> upgrade_detector);
52
53  // We periodically check to see if Chrome has been upgraded.
54  base::RepeatingTimer<UpgradeDetectorImpl> detect_upgrade_timer_;
55
56  // After we detect an upgrade we start a recurring timer to see if enough time
57  // has passed and we should start notifying the user.
58  base::RepeatingTimer<UpgradeDetectorImpl> upgrade_notification_timer_;
59
60  // We use this factory to create callback tasks for UpgradeDetected. We pass
61  // the task to the actual upgrade detection code, which is in
62  // DetectUpgradeTask.
63  base::WeakPtrFactory<UpgradeDetectorImpl> weak_factory_;
64
65  // True if this build is a dev or canary channel build.
66  bool is_unstable_channel_;
67
68  // The date the binaries were built.
69  base::Time build_date_;
70
71  DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
72};
73
74
75#endif  // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
76