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// Copyright 2016 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_SYNC_SERVICE_BASE_H_
#define COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_BASE_H_
#include <memory>
#include <string>
#include "base/files/file_path.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread.h"
#include "components/sync/base/sync_prefs.h"
#include "components/sync/base/unrecoverable_error_handler.h"
#include "components/sync/base/weak_handle.h"
#include "components/sync/driver/signin_manager_wrapper.h"
#include "components/sync/driver/sync_client.h"
#include "components/sync/driver/sync_service.h"
#include "components/sync/engine/sync_engine.h"
#include "components/sync/engine/sync_engine_host.h"
#include "components/sync/engine/sync_manager.h"
#include "components/sync/js/sync_js_controller.h"
#include "components/version_info/version_info.h"
namespace syncer {
// This is a base class for implementations of SyncService that contains some
// common functionality and member variables. Anything that can live inside the
// sync component should eventually live here instead of a concrete
// implementation. This is set up as a base class so things can be transferred
// piece by piece as easily as possible.
class SyncServiceBase : public SyncService, public SyncEngineHost {
public:
SyncServiceBase(std::unique_ptr<SyncClient> sync_client,
std::unique_ptr<SigninManagerWrapper> signin,
const version_info::Channel& channel,
const base::FilePath& base_directory,
const std::string& debug_identifier);
~SyncServiceBase() override;
protected:
// Kicks off asynchronous initialization of the SyncEngine.
void InitializeEngine();
// Returns SyncCredentials from the OAuth2TokenService.
virtual SyncCredentials GetCredentials() = 0;
// Returns a weak handle to the JsEventHandler.
virtual WeakHandle<JsEventHandler> GetJsEventHandler() = 0;
// Returns a callback that makes an HttpPostProviderFactory.
virtual SyncEngine::HttpPostProviderFactoryGetter
MakeHttpPostProviderFactoryGetter() = 0;
// Takes the previously saved nigori state; null if there isn't any.
virtual std::unique_ptr<SyncEncryptionHandler::NigoriState>
MoveSavedNigoriState() = 0;
// Returns a weak handle to an UnrecoverableErrorHandler (may be |this|).
virtual WeakHandle<UnrecoverableErrorHandler>
GetUnrecoverableErrorHandler() = 0;
// This profile's SyncClient, which abstracts away non-Sync dependencies and
// the Sync API component factory.
const std::unique_ptr<SyncClient> sync_client_;
// Encapsulates user signin - used to set/get the user's authenticated
// email address.
const std::unique_ptr<SigninManagerWrapper> signin_;
// The product channel of the embedder.
const version_info::Channel channel_;
// The path to the base directory under which sync should store its
// information.
const base::FilePath base_directory_;
// The full path to the sync data folder. The folder is not fully deleted when
// sync is disabled, since it holds both Directory and ModelTypeStore data.
// Directory files will be selectively targeted instead.
const base::FilePath sync_data_folder_;
// An identifier representing this instance for debugging purposes.
const std::string debug_identifier_;
// The class that handles getting, setting, and persisting sync
// preferences.
SyncPrefs sync_prefs_;
// The thread where all the sync operations happen. This thread is kept alive
// until browser shutdown and reused if sync is turned off and on again. It is
// joined during the shutdown process, but there is an abort mechanism in
// place to prevent slow HTTP requests from blocking browser shutdown.
std::unique_ptr<base::Thread> sync_thread_;
// Our asynchronous engine to communicate with sync components living on
// other threads.
std::unique_ptr<SyncEngine> engine_;
private:
bool GetLocalSyncConfig(base::FilePath* local_sync_backend_folder) const;
DISALLOW_COPY_AND_ASSIGN(SyncServiceBase);
};
} // namespace syncer
#endif // COMPONENTS_SYNC_DRIVER_SYNC_SERVICE_BASE_H_
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