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// Copyright 2017 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_MODEL_SYNC_METADATA_STORE_CHANGE_LIST_H_
#define COMPONENTS_SYNC_MODEL_SYNC_METADATA_STORE_CHANGE_LIST_H_
#include <string>
#include "base/memory/raw_ptr.h"
#include "components/sync/base/data_type.h"
#include "components/sync/model/metadata_change_list.h"
#include "components/sync/model/model_error.h"
#include "components/sync/model/sync_metadata_store.h"
namespace sync_pb {
class DataTypeState;
class EntityMetadata;
} // namespace sync_pb
namespace syncer {
// A thin wrapper around an SyncMetadataStore that implements sync's
// MetadataChangeList interface. Changes are passed directly into the store and
// not stored inside this object.
class SyncMetadataStoreChangeList : public MetadataChangeList {
public:
using ErrorCallback = base::RepeatingCallback<void(const ModelError&)>;
// If an error happened during any Update*/Clear* operation, then
// `error_callback` will be called during destruction and passed the error.
// Should typically be bound to DataTypeLocalChangeProcessor::ReportError().
SyncMetadataStoreChangeList(SyncMetadataStore* store,
DataType type,
ErrorCallback error_callback);
~SyncMetadataStoreChangeList() override;
// MetadataChangeList implementation.
void UpdateDataTypeState(
const sync_pb::DataTypeState& data_type_state) override;
void ClearDataTypeState() override;
void UpdateMetadata(const std::string& storage_key,
const sync_pb::EntityMetadata& metadata) override;
void ClearMetadata(const std::string& storage_key) override;
const SyncMetadataStore* GetMetadataStoreForTesting() const;
private:
void SetError(ModelError error);
// The metadata store to store metadata in; always outlives `this`.
const raw_ptr<SyncMetadataStore> store_;
// The sync data type for this metadata.
DataType type_;
// Whether this object encountered any error previously. Used to prevent any
// further changes, and to ensure that only the first error gets passed on
// (since any subsequent ones likely aren't meaningful).
bool error_encountered_ = false;
const ErrorCallback error_callback_;
};
} // namespace syncer
#endif // COMPONENTS_SYNC_MODEL_SYNC_METADATA_STORE_CHANGE_LIST_H_
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