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/timer.h"
  10 #include "base/version.h"
  11 #include "chrome/browser/upgrade_detector.h"
  12
  13 template <typename T> struct DefaultSingletonTraits;
  14
  15 class UpgradeDetectorImpl : public UpgradeDetector {
  16  public:
  17   virtual ~UpgradeDetectorImpl();
  18
  19   // Returns the currently installed Chrome version, which may be newer than the
  20   // one currently running. Not supported on Android, iOS or ChromeOS. Must be
  21   // run on a thread where I/O operations are allowed (e.g. FILE thread).
  22   static base::Version GetCurrentlyInstalledVersion();
  23
  24   // Returns the singleton instance.
  25   static UpgradeDetectorImpl* GetInstance();
  26
  27  private:
  28   friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
  29
  30   UpgradeDetectorImpl();
  31
  32   // Start the timer that will call |CheckForUpgrade()|.
  33   void StartTimerForUpgradeCheck();
  34
  35   // Launches a task on the file thread to check if we have the latest version.
  36   void CheckForUpgrade();
  37
  38   // Sends out a notification and starts a one shot timer to wait until
  39   // notifying the user.
  40   void UpgradeDetected(UpgradeAvailable upgrade_available);
  41
  42   // Returns true after calling UpgradeDetected if current install is outdated.
  43   bool DetectOutdatedInstall();
  44
  45   // The function that sends out a notification (after a certain time has
  46   // elapsed) that lets the rest of the UI know we should start notifying the
  47   // user that a new version is available.
  48   void NotifyOnUpgrade();
  49
  50   // Called on the FILE thread to detect an upgrade. Calls back UpgradeDetected
  51   // on the UI thread if so. Although it looks weird, this needs to be a static
  52   // method receiving a WeakPtr<> to this object so that we can interrupt
  53   // the UpgradeDetected callback before it runs. Having this method non-static
  54   // and using |this| directly wouldn't be thread safe. And keeping it as a
  55   // non-class function would prevent it from calling UpgradeDetected.
  56   static void DetectUpgradeTask(
  57       base::WeakPtr<UpgradeDetectorImpl> upgrade_detector);
  58
  59   // We periodically check to see if Chrome has been upgraded.
  60   base::RepeatingTimer<UpgradeDetectorImpl> detect_upgrade_timer_;
  61
  62   // After we detect an upgrade we start a recurring timer to see if enough time
  63   // has passed and we should start notifying the user.
  64   base::RepeatingTimer<UpgradeDetectorImpl> upgrade_notification_timer_;
  65
  66   // We use this factory to create callback tasks for UpgradeDetected. We pass
  67   // the task to the actual upgrade detection code, which is in
  68   // DetectUpgradeTask.
  69   base::WeakPtrFactory<UpgradeDetectorImpl> weak_factory_;
  70
  71   // True if this build is a dev or canary channel build.
  72   bool is_unstable_channel_;
  73
  74   // True if auto update is turned on.
  75   bool is_auto_update_enabled_;
  76
  77   // The date the binaries were built.
  78   base::Time build_date_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
  81 };
  82
  83
  84 #endif  // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_