components/sync/service/sync_api_component_factory.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_SERVICE_SYNC_API_COMPONENT_FACTORY_H_
#define COMPONENTS_SYNC_SERVICE_SYNC_API_COMPONENT_FACTORY_H_

#include <memory>
#include <string>

#include "components/sync/base/model_type.h"
#include "components/sync/service/data_type_controller.h"

namespace syncer {

class DataTypeEncryptionHandler;
class DataTypeManager;
class DataTypeManagerObserver;
class ModelTypeConfigurer;
class SyncEngine;
class SyncInvalidationsService;

// This factory provides sync service code with the model type specific sync/api
// service (like SyncableService) implementations.
class SyncApiComponentFactory {
 public:
  virtual ~SyncApiComponentFactory() = default;

  virtual std::unique_ptr<DataTypeManager> CreateDataTypeManager(
      const DataTypeController::TypeMap* controllers,
      const DataTypeEncryptionHandler* encryption_handler,
      ModelTypeConfigurer* configurer,
      DataTypeManagerObserver* observer) = 0;

  // Creating this in the factory helps us mock it out in testing.
  // `sync_invalidation_service` must not be null.
  virtual std::unique_ptr<SyncEngine> CreateSyncEngine(
      const std::string& name,
      SyncInvalidationsService* sync_invalidation_service) = 0;

  // Returns whether the local transport data indicates that a sync engine
  // previously initialized successfully and hence populated at least some
  // transport data (e.g. birthday). It also implies that the client
  // successfully communicated to the server at least once.
  virtual bool HasTransportDataIncludingFirstSync() = 0;

  // Clears all local transport data. Upon calling this, the deletion is
  // guaranteed to finish before a new engine returned by `CreateSyncEngine()`
  // can do any proper work.
  virtual void ClearAllTransportData() = 0;
};

}  // namespace syncer

#endif  // COMPONENTS_SYNC_SERVICE_SYNC_API_COMPONENT_FACTORY_H_