chrome/browser/upgrade_detector_impl.h

   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
  12 template <typename T> struct DefaultSingletonTraits;
  13
  14 class 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  36   // Returns true after calling UpgradeDetected if current install is outdated.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_