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// Copyright 2018 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_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_PROFILE_SYNC_BRIDGE_H_
#define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_PROFILE_SYNC_BRIDGE_H_
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/optional.h"
#include "base/scoped_observer.h"
#include "base/supports_user_data.h"
#include "base/threading/thread_checker.h"
#include "components/autofill/core/browser/webdata/autofill_change.h"
#include "components/autofill/core/browser/webdata/autofill_webdata_service_observer.h"
#include "components/sync/model/model_type_sync_bridge.h"
namespace syncer {
class MetadataChangeList;
class ModelError;
class ModelTypeChangeProcessor;
} // namespace syncer
namespace autofill {
class AutofillProfileSyncDifferenceTracker;
class AutofillTable;
class AutofillWebDataBackend;
class AutofillWebDataService;
// Sync bridge implementation for AUTOFILL_PROFILE model type. Takes care of
// propagating local autofill profiles to other clients as well as incorporating
// profiles coming from other clients; and most notably resolving conflicts and
// merging duplicates.
//
// This is achieved by implementing the interface ModelTypeSyncBridge, which
// ClientTagBasedModelTypeProcessor will use to interact, ultimately, with the
// sync server. See
// https://chromium.googlesource.com/chromium/src/+/lkcr/docs/sync/model_api.md#Implementing-ModelTypeSyncBridge
// for details.
class AutofillProfileSyncBridge
: public base::SupportsUserData::Data,
public AutofillWebDataServiceObserverOnDBSequence,
public syncer::ModelTypeSyncBridge {
public:
AutofillProfileSyncBridge(
std::unique_ptr<syncer::ModelTypeChangeProcessor> change_processor,
const std::string& app_locale,
AutofillWebDataBackend* backend);
~AutofillProfileSyncBridge() override;
// Constructor that hides dealing with change_processor and also stores the
// created bridge within |web_data_service|.
static void CreateForWebDataServiceAndBackend(
const std::string& app_locale,
AutofillWebDataBackend* web_data_backend,
AutofillWebDataService* web_data_service);
// Retrieves the bridge from |web_data_service| which owns it.
static syncer::ModelTypeSyncBridge* FromWebDataService(
AutofillWebDataService* web_data_service);
// syncer::ModelTypeSyncBridge implementation.
std::unique_ptr<syncer::MetadataChangeList> CreateMetadataChangeList()
override;
base::Optional<syncer::ModelError> MergeSyncData(
std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
syncer::EntityChangeList entity_data) override;
base::Optional<syncer::ModelError> ApplySyncChanges(
std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
syncer::EntityChangeList entity_changes) override;
void GetData(StorageKeyList storage_keys, DataCallback callback) override;
void GetAllDataForDebugging(DataCallback callback) override;
std::string GetClientTag(const syncer::EntityData& entity_data) override;
std::string GetStorageKey(const syncer::EntityData& entity_data) override;
// AutofillWebDataServiceObserverOnDBSequence implementation.
void AutofillProfileChanged(const AutofillProfileChange& change) override;
private:
// Returns the table associated with the |web_data_backend_|.
AutofillTable* GetAutofillTable();
// Respond to local autofill profile entry changing by notifying sync of the
// changes.
void ActOnLocalChange(const AutofillProfileChange& change);
// Flushes changes accumulated within |tracker| both to local and to sync.
base::Optional<syncer::ModelError> FlushSyncTracker(
std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
AutofillProfileSyncDifferenceTracker* tracker);
// Synchronously load sync metadata from the autofill table and pass it to the
// processor so that it can start tracking changes.
void LoadMetadata();
// The bridge should be used on the same sequence where it is constructed.
THREAD_CHECKER(thread_checker_);
// Locale needed for comparing autofill profiles when resolving conflicts.
const std::string app_locale_;
// AutofillProfileSyncBridge is owned by |web_data_backend_| through
// SupportsUserData, so it's guaranteed to outlive |this|.
AutofillWebDataBackend* const web_data_backend_;
ScopedObserver<AutofillWebDataBackend, AutofillProfileSyncBridge>
scoped_observer_;
DISALLOW_COPY_AND_ASSIGN(AutofillProfileSyncBridge);
};
} // namespace autofill
#endif // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_PROFILE_SYNC_BRIDGE_H_
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