// Copyright 2012 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_SEARCH_ENGINES_SEARCH_ENGINE_DATA_TYPE_CONTROLLER_H__
#define COMPONENTS_SEARCH_ENGINES_SEARCH_ENGINE_DATA_TYPE_CONTROLLER_H__

#include <string>

#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "components/search_engines/template_url_service.h"
#include "components/sync_driver/ui_data_type_controller.h"

class Profile;

namespace browser_sync {

// Controller for the SEARCH_ENGINES sync data type. This class tells sync
// how to load the model for this data type, and the superclasses manage
// controlling the rest of the state of the datatype with regards to sync.
class SearchEngineDataTypeController
    : public sync_driver::UIDataTypeController {
 public:
  SearchEngineDataTypeController(
      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
      const base::Closure& error_callback,
      sync_driver::SyncClient* sync_client,
      TemplateURLService* template_url_service);

  TemplateURLService::Subscription* GetSubscriptionForTesting();

 private:
  ~SearchEngineDataTypeController() override;

  // FrontendDataTypeController:
  bool StartModels() override;
  void StopModels() override;

  void OnTemplateURLServiceLoaded();

  // A reference to the UI thread's task runner.
  const scoped_refptr<base::SingleThreadTaskRunner> ui_thread_;

  // A pointer to the template URL service that this data type will use.
  TemplateURLService* template_url_service_;

  // A subscription to the OnLoadedCallback so it can be cleared if necessary.
  scoped_ptr<TemplateURLService::Subscription> template_url_subscription_;

  DISALLOW_COPY_AND_ASSIGN(SearchEngineDataTypeController);
};

}  // namespace browser_sync

#endif  // COMPONENTS_SEARCH_ENGINES_SEARCH_ENGINE_DATA_TYPE_CONTROLLER_H__