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 CHROME_BROWSER_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_
6#define CHROME_BROWSER_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_
7
8#include "base/callback.h"
9#include "base/memory/weak_ptr.h"
10
11class ManagedUserSigninManagerWrapper;
12
13namespace sync_driver {
14class SyncPrefs;
15}
16
17namespace browser_sync {
18
19// BackupRollbackController takes two closures for starting backup/rollback
20// process. It calls the closures according to user's signin status or
21// received rollback command. Backup is not run when user signed in, even when
22// sync is not running.
23class BackupRollbackController {
24 public:
25  BackupRollbackController(sync_driver::SyncPrefs* sync_prefs,
26                           const ManagedUserSigninManagerWrapper* signin,
27                           base::Closure start_backup,
28                           base::Closure start_rollback);
29  ~BackupRollbackController();
30
31  // Check to see whether to start backup/rollback. |delay| specifies the time
32  // to wait before checking.
33  void Start(base::TimeDelta delay);
34
35  // Update rollback preference to indicate rollback is needed.
36  void OnRollbackReceived();
37
38  // Update rollback preference to indicate rollback is finished.
39  void OnRollbackDone();
40
41  // Return true if platform supports backup and backup is enabled.
42  static bool IsBackupEnabled();
43
44 private:
45  // Check signin status and rollback preference and start backup/rollback
46  // accordingly.
47  void TryStart();
48
49  sync_driver::SyncPrefs* sync_prefs_;
50
51  // Use ManagedUserSigninManagerWrapper instead of SigninManagerBase because
52  // SigninManagerBase could return non-empty user name for managed user, which
53  // would cause backup to trumpet normal sync for managed user.
54  const ManagedUserSigninManagerWrapper* signin_;
55
56  base::Closure start_backup_;
57  base::Closure start_rollback_;
58  base::WeakPtrFactory<BackupRollbackController> weak_ptr_factory_;
59
60  DISALLOW_COPY_AND_ASSIGN(BackupRollbackController);
61};
62
63}  // namespace browser_sync
64
65#endif  // CHROME_BROWSER_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_
66