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   void ClearServerData(const ClearServerDataCallback& callback) override;
  42
  43  private:
  44   // Replaces local IDs with server IDs and clear unsynced bit of modified
  45   // entries.
  46   void NormalizeEntries();
  47
  48   // Manipulate preference nodes so that they'll be overwritten by local
  49   // preference values during model association, i.e. local wins instead of
  50   // server wins. This is for preventing backup from changing preferences in
  51   // case backup DB has hijacked preferences.
  52   void HideSyncPreference(ModelType pref_type);
  53
  54   // Handles of unsynced entries caused by local model changes.
  55   std::set<int64> unsynced_;
  56
  57   // True if NormalizeEntries() is being called.
  58   bool in_normalization_;
  59
  60   SyncStatus status_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(SyncBackupManager);
  63 };
  64
  65 }  // namespace syncer
  66
  67 #endif  // SYNC_INTERNAL_API_SYNC_BACKUP_MANAGER_H_