sync/internal_api/sync_backup_manager.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 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
  13 namespace 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.
  18 class SYNC_EXPORT_PRIVATE SyncBackupManager : public SyncRollbackManagerBase {
  19  public:
  20   SyncBackupManager();
  21   ~SyncBackupManager() override;
  22
  23   // SyncManager implementation.
  24   void Init(InitArgs* args) override;
  25   void SaveChanges() override;
  26   SyncStatus GetDetailedStatus() const override;
  27   void ShutdownOnSyncThread(ShutdownReason reason) override;
  28
  29   // DirectoryChangeDelegate implementation.
  30   ModelTypeSet HandleTransactionEndingChangeEvent(
  31       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
  32       syncable::BaseTransaction* trans) override;
  33
  34   void RegisterDirectoryTypeDebugInfoObserver(
  35       syncer::TypeDebugInfoObserver* observer) override;
  36   void UnregisterDirectoryTypeDebugInfoObserver(
  37       syncer::TypeDebugInfoObserver* observer) override;
  38   bool HasDirectoryTypeDebugInfoObserver(
  39       syncer::TypeDebugInfoObserver* observer) override;
  40   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_