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      1 // Copyright (c) 2012 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_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_
      6 #define CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/weak_ptr.h"
     10 #include "chrome/browser/ui/webui/help/version_updater.h"
     11 #include "chromeos/dbus/update_engine_client.h"
     12 
     13 class VersionUpdaterCros : public VersionUpdater,
     14                            public chromeos::UpdateEngineClient::Observer {
     15  public:
     16   // VersionUpdater implementation.
     17   virtual void CheckForUpdate(const StatusCallback& callback) OVERRIDE;
     18   virtual void RelaunchBrowser() const OVERRIDE;
     19   virtual void SetChannel(const std::string& channel,
     20                           bool is_powerwash_allowed) OVERRIDE;
     21   virtual void GetChannel(bool get_current_channel,
     22                           const ChannelCallback& callback) OVERRIDE;
     23 
     24   // Gets the last update status, without triggering a new check or download.
     25   void GetUpdateStatus(const StatusCallback& callback);
     26 
     27  protected:
     28   friend class VersionUpdater;
     29 
     30   // Clients must use VersionUpdater::Create().
     31   VersionUpdaterCros();
     32   virtual ~VersionUpdaterCros();
     33 
     34  private:
     35   // UpdateEngineClient::Observer implementation.
     36   virtual void UpdateStatusChanged(
     37       const chromeos::UpdateEngineClient::Status& status) OVERRIDE;
     38 
     39   // Callback from UpdateEngineClient::RequestUpdateCheck().
     40   void OnUpdateCheck(chromeos::UpdateEngineClient::UpdateCheckResult result);
     41 
     42   // Callback used to communicate update status to the client.
     43   StatusCallback callback_;
     44 
     45   // Last state received via UpdateStatusChanged().
     46   chromeos::UpdateEngineClient::UpdateStatusOperation last_operation_;
     47 
     48   // True if an update check should be scheduled when the update engine is idle.
     49   bool check_for_update_when_idle_;
     50 
     51   base::WeakPtrFactory<VersionUpdaterCros> weak_ptr_factory_;
     52 
     53   DISALLOW_COPY_AND_ASSIGN(VersionUpdaterCros);
     54 };
     55 
     56 #endif  // CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_
     57