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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYNC_DRIVER_DEVICE_INFO_SERVICE_H_
#define COMPONENTS_SYNC_DRIVER_DEVICE_INFO_SERVICE_H_
#include <map>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "components/sync_driver/device_info_tracker.h"
#include "components/sync_driver/local_device_info_provider.h"
#include "sync/api/model_type_service.h"
#include "sync/internal_api/public/simple_metadata_change_list.h"
namespace syncer {
class SyncError;
} // namespace syncer
namespace syncer_v2 {
class ModelTypeChangeProcessor;
} // namespace syncer_v2
namespace sync_pb {
class DeviceInfoSpecifics;
} // namespace sync_pb
namespace sync_driver_v2 {
// USS service implementation for DEVICE_INFO model type. Handles storage of
// device info and associated sync metadata, applying/merging foreign changes,
// and allows public read access.
class DeviceInfoService : public syncer_v2::ModelTypeService,
public sync_driver::DeviceInfoTracker {
public:
explicit DeviceInfoService(
sync_driver::LocalDeviceInfoProvider* local_device_info_provider);
~DeviceInfoService() override;
// ModelTypeService implementation.
scoped_ptr<syncer_v2::MetadataChangeList> CreateMetadataChangeList() override;
syncer::SyncError MergeSyncData(
scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
syncer_v2::EntityDataList entity_data_list) override;
syncer::SyncError ApplySyncChanges(
scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
syncer_v2::EntityChangeList entity_changes) override;
void LoadMetadata(MetadataCallback callback) override;
void GetData(ClientKeyList client_keys, DataCallback callback) override;
void GetAllData(DataCallback callback) override;
std::string GetClientTag(const syncer_v2::EntityData& entity_data) override;
// DeviceInfoTracker implementation.
bool IsSyncing() const override;
scoped_ptr<sync_driver::DeviceInfo> GetDeviceInfo(
const std::string& client_id) const override;
ScopedVector<sync_driver::DeviceInfo> GetAllDeviceInfo() const override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
// Called to update local device backup time.
void UpdateLocalDeviceBackupTime(base::Time backup_time);
// Gets the most recently set local device backup time.
base::Time GetLocalDeviceBackupTime() const;
private:
friend class DeviceInfoServiceTest;
scoped_ptr<sync_pb::DeviceInfoSpecifics> CreateLocalSpecifics();
static scoped_ptr<sync_pb::DeviceInfoSpecifics> CreateSpecifics(
const sync_driver::DeviceInfo& info);
// Allocate new DeviceInfo from SyncData.
static scoped_ptr<sync_driver::DeviceInfo> CreateDeviceInfo(
const sync_pb::DeviceInfoSpecifics& specifics);
// Store SyncData in the cache.
void StoreSpecifics(scoped_ptr<sync_pb::DeviceInfoSpecifics> specifics);
// Delete SyncData from the cache.
void DeleteSpecifics(const std::string& client_id);
// Notify all registered observers.
void NotifyObservers();
void OnProviderInitialized();
// |local_device_backup_time_| accessors.
int64 local_device_backup_time() const { return local_device_backup_time_; }
bool has_local_device_backup_time() const {
return local_device_backup_time_ >= 0;
}
void set_local_device_backup_time(int64 value) {
local_device_backup_time_ = value;
}
void clear_local_device_backup_time() { local_device_backup_time_ = -1; }
// TODO(skym): Remove once we remove local provider.
// Local device last set backup time (in proto format).
// -1 if the value hasn't been specified
int64 local_device_backup_time_;
// |local_device_info_provider_| isn't owned.
const sync_driver::LocalDeviceInfoProvider* const local_device_info_provider_;
// TODO(skym): Switch to use client tag hash instead of cache guid as key.
// Cache of all syncable and local data, stored by device cache guid.
using ClientIdToSpecifics =
std::map<std::string, scoped_ptr<sync_pb::DeviceInfoSpecifics>>;
ClientIdToSpecifics all_data_;
// Registered observers, not owned.
base::ObserverList<Observer, true> observers_;
scoped_ptr<sync_driver::LocalDeviceInfoProvider::Subscription> subscription_;
DISALLOW_COPY_AND_ASSIGN(DeviceInfoService);
};
} // namespace sync_driver_v2
#endif // COMPONENTS_SYNC_DRIVER_DEVICE_INFO_SERVICE_H_
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