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// Copyright 2018 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_DOWNLOAD_DATABASE_DOWNLOAD_DB_IMPL_H_
#define COMPONENTS_DOWNLOAD_DATABASE_DOWNLOAD_DB_IMPL_H_
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/memory/weak_ptr.h"
#include "components/download/database/download_db.h"
#include "components/leveldb_proto/public/proto_database.h"
namespace download_pb {
class DownloadDBEntry;
}
namespace leveldb_proto {
class ProtoDatabaseProvider;
} // namespace leveldb_proto
namespace download {
// A protodb Implementation of DownloadDB.
class DownloadDBImpl : public DownloadDB {
public:
DownloadDBImpl(DownloadNamespace download_namespace,
const base::FilePath& database_dir,
leveldb_proto::ProtoDatabaseProvider* db_provider);
DownloadDBImpl(
DownloadNamespace download_namespace,
std::unique_ptr<
leveldb_proto::ProtoDatabase<download_pb::DownloadDBEntry>> db);
DownloadDBImpl(const DownloadDBImpl&) = delete;
DownloadDBImpl& operator=(const DownloadDBImpl&) = delete;
~DownloadDBImpl() override;
// DownloadDB implementation.
void Initialize(DownloadDBCallback callback) override;
void AddOrReplace(const DownloadDBEntry& entry) override;
void AddOrReplaceEntries(const std::vector<DownloadDBEntry>& entries,
DownloadDBCallback callback) override;
void LoadEntries(LoadEntriesCallback callback) override;
void Remove(const std::string& guid) override;
private:
friend class DownloadDBTest;
bool IsInitialized();
void DestroyAndReinitialize(DownloadDBCallback callback);
// Returns the key of the db entry.
std::string GetEntryKey(const std::string& guid) const;
// Called when database is initialized.
void OnDatabaseInitialized(DownloadDBCallback callback,
leveldb_proto::Enums::InitStatus status);
// Called when database is destroyed.
void OnDatabaseDestroyed(DownloadDBCallback callback, bool success);
// Called when entry is removed.
void OnRemoveDone(bool success);
// Called when all database entries are loaded.
void OnAllEntriesLoaded(
LoadEntriesCallback callback,
bool success,
std::unique_ptr<std::vector<download_pb::DownloadDBEntry>> entries);
// Proto db for storing all the entries.
std::unique_ptr<leveldb_proto::ProtoDatabase<download_pb::DownloadDBEntry>>
db_;
// Whether the object is initialized.
bool is_initialized_ = false;
// Namespace of this db.
DownloadNamespace download_namespace_;
// Number of initialize attempts.
int num_initialize_attempts_ = 0;
base::WeakPtrFactory<DownloadDBImpl> weak_factory_{this};
};
} // namespace download
#endif // COMPONENTS_DOWNLOAD_DATABASE_DOWNLOAD_DB_IMPL_H_
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