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 SYNC_INTERNAL_API_SYNC_BACKUP_MANAGER_H_
6#define SYNC_INTERNAL_API_SYNC_BACKUP_MANAGER_H_
7
8#include <set>
9
10#include "sync/internal_api/sync_rollback_manager_base.h"
11#include "url/gurl.h"
12
13namespace syncer {
14
15// SyncBackupManager runs before user signs in to sync to back up user's data
16// before sync starts. The data that's backed up can be used to restore user's
17// settings to pre-sync state.
18class SYNC_EXPORT_PRIVATE SyncBackupManager : public SyncRollbackManagerBase {
19 public:
20  SyncBackupManager();
21  virtual ~SyncBackupManager();
22
23  // SyncManager implementation.
24  virtual void Init(InitArgs* args) OVERRIDE;
25  virtual void SaveChanges() OVERRIDE;
26  virtual SyncStatus GetDetailedStatus() const OVERRIDE;
27  virtual void ShutdownOnSyncThread(ShutdownReason reason) OVERRIDE;
28
29  // DirectoryChangeDelegate implementation.
30  virtual ModelTypeSet HandleTransactionEndingChangeEvent(
31      const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
32      syncable::BaseTransaction* trans) OVERRIDE;
33
34  virtual void RegisterDirectoryTypeDebugInfoObserver(
35      syncer::TypeDebugInfoObserver* observer) OVERRIDE;
36  virtual void UnregisterDirectoryTypeDebugInfoObserver(
37      syncer::TypeDebugInfoObserver* observer) OVERRIDE;
38  virtual bool HasDirectoryTypeDebugInfoObserver(
39      syncer::TypeDebugInfoObserver* observer) OVERRIDE;
40  virtual void RequestEmitDebugInfo() OVERRIDE;
41
42 private:
43  // Replaces local IDs with server IDs and clear unsynced bit of modified
44  // entries.
45  void NormalizeEntries();
46
47  // Manipulate preference nodes so that they'll be overwritten by local
48  // preference values during model association, i.e. local wins instead of
49  // server wins. This is for preventing backup from changing preferences in
50  // case backup DB has hijacked preferences.
51  void HideSyncPreference(ModelType pref_type);
52
53  // Handles of unsynced entries caused by local model changes.
54  std::set<int64> unsynced_;
55
56  // True if NormalizeEntries() is being called.
57  bool in_normalization_;
58
59  SyncStatus status_;
60
61  DISALLOW_COPY_AND_ASSIGN(SyncBackupManager);
62};
63
64}  // namespace syncer
65
66#endif  // SYNC_INTERNAL_API_SYNC_BACKUP_MANAGER_H_
67