components/sync_driver/backup_rollback_controller.h

   1 // Copyright 2014 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 COMPONENTS_SYNC_DRIVER_BACKUP_ROLLBACK_CONTROLLER_H_
   6 #define COMPONENTS_SYNC_DRIVER_BACKUP_ROLLBACK_CONTROLLER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/weak_ptr.h"
  10
  11 class SigninManagerWrapper;
  12
  13 namespace sync_driver {
  14
  15 class SyncPrefs;
  16
  17 // BackupRollbackController takes two closures for starting backup/rollback
  18 // process. It calls the closures according to user's signin status or
  19 // received rollback command. Backup is not run when user signed in, even when
  20 // sync is not running.
  21 class BackupRollbackController {
  22  public:
  23   BackupRollbackController(sync_driver::SyncPrefs* sync_prefs,
  24                            const SigninManagerWrapper* signin,
  25                            base::Closure start_backup,
  26                            base::Closure start_rollback);
  27   ~BackupRollbackController();
  28
  29   // Post task to run |start_backup_| if conditions are met. Return true if
  30   // task is posted, false otherwise.
  31   bool StartBackup();
  32
  33   // Post task to run |start_rollback_| if conditions are met. Return true if
  34   // task is posted, false otherwise.
  35   bool StartRollback();
  36
  37   // Update rollback preference to indicate rollback is needed.
  38   void OnRollbackReceived();
  39
  40   // Update rollback preference to indicate rollback is finished.
  41   void OnRollbackDone();
  42
  43   // Return true if platform supports backup and backup is enabled.
  44   static bool IsBackupEnabled();
  45
  46  private:
  47   sync_driver::SyncPrefs* sync_prefs_;
  48
  49   // Use SigninManagerWrapper instead of SigninManagerBase so that
  50   // supervised users are treated like regular signed-in users.
  51   const SigninManagerWrapper* signin_;
  52
  53   base::Closure start_backup_;
  54   base::Closure start_rollback_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(BackupRollbackController);
  57 };
  58
  59 }  // namespace sync_driver
  60
  61 #endif  // COMPONENTS_SYNC_DRIVER_BACKUP_ROLLBACK_CONTROLLER_H_