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// Copyright 2015 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_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_IMPL_H_
#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_IMPL_H_
#include <stdint.h>
#include <vector>
#include "base/files/file_path.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "components/leveldb_proto/proto_database.h"
#include "components/offline_pages/offline_page_metadata_store.h"
namespace base {
class SequencedTaskRunner;
}
namespace offline_pages {
class OfflinePageEntry;
// Implements OfflinePageMetadataStore using leveldb_proto::ProtoDatabase
// component. Stores metadata of offline pages as serialized protobufs in a
// LevelDB key/value pairs.
// Underlying implementation guarantees that all of the method calls will be
// executed sequentially, and started operations will finish even after the
// store is already destroyed (callbacks will be called).
class OfflinePageMetadataStoreImpl : public OfflinePageMetadataStore {
public:
OfflinePageMetadataStoreImpl(
scoped_refptr<base::SequencedTaskRunner> background_task_runner,
const base::FilePath& database_dir);
~OfflinePageMetadataStoreImpl() override;
// OfflinePageMetadataStore implementation:
void Load(const LoadCallback& callback) override;
void AddOrUpdateOfflinePage(const OfflinePageItem& offline_page_record,
const UpdateCallback& callback) override;
void RemoveOfflinePages(const std::vector<int64_t>& offline_ids,
const UpdateCallback& callback) override;
void Reset(const ResetCallback& callback) override;
private:
void LoadContinuation(const LoadCallback& callback, bool success);
void LoadDone(const LoadCallback& callback,
bool success,
scoped_ptr<std::vector<OfflinePageEntry>> entries);
void NotifyLoadResult(const LoadCallback& callback,
LoadStatus status,
const std::vector<OfflinePageItem>& result);
// Implements the update.
void UpdateEntries(
scoped_ptr<leveldb_proto::ProtoDatabase<OfflinePageEntry>::KeyEntryVector>
entries_to_save,
scoped_ptr<std::vector<std::string>> keys_to_remove,
const UpdateCallback& callback);
void UpdateDone(const OfflinePageMetadataStore::UpdateCallback& callback,
bool success);
void ResetDone(const ResetCallback& callback, bool success);
// Called when a database has to be migrated from old bookmark ids
// to new offline ids.
// TODO(bburns): Perhaps remove this eventually?
void DatabaseUpdateDone(const OfflinePageMetadataStore::LoadCallback& cb,
LoadStatus status,
const std::vector<OfflinePageItem>& result,
bool success);
scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
base::FilePath database_dir_;
scoped_ptr<leveldb_proto::ProtoDatabase<OfflinePageEntry>> database_;
base::WeakPtrFactory<OfflinePageMetadataStoreImpl> weak_ptr_factory_;
FRIEND_TEST_ALL_PREFIXES(OfflinePageMetadataStoreImplTest,
LoadCorruptedStore);
FRIEND_TEST_ALL_PREFIXES(OfflinePageMetadataStoreImplTest,
LoadTotallyCorruptedStore);
DISALLOW_COPY_AND_ASSIGN(OfflinePageMetadataStoreImpl);
};
} // namespace offline_pages
#endif // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_METADATA_STORE_IMPL_H_
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