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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_CDM_STORAGE_DATABASE_H_
#define CONTENT_BROWSER_MEDIA_CDM_STORAGE_DATABASE_H_
#include <stdint.h>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "base/sequence_checker.h"
#include "content/browser/media/cdm_storage_common.h"
#include "content/common/content_export.h"
#include "content/public/browser/cdm_storage_data_model.h"
#include "content/public/browser/storage_partition.h"
#include "media/cdm/cdm_type.h"
#include "sql/database.h"
#include "sql/meta_table.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
namespace content {
// Helper class which encapsulates all database logic for storing cdm data.
//
// This class must be constructed and used on a sequence which allows blocking.
class CONTENT_EXPORT CdmStorageDatabase {
public:
// The database will be in-memory if `path` is empty.
explicit CdmStorageDatabase(const base::FilePath& path);
~CdmStorageDatabase();
CdmStorageOpenError EnsureOpen();
std::optional<std::vector<uint8_t>> ReadFile(
const blink::StorageKey& storage_key,
const media::CdmType& cdm_type,
const std::string& file_name);
bool WriteFile(const blink::StorageKey& storage_key,
const media::CdmType& cdm_type,
const std::string& file_name,
const std::vector<uint8_t>& data);
std::optional<uint64_t> GetSizeForFile(const blink::StorageKey& storage_key,
const media::CdmType& cdm_type,
const std::string& file_name);
std::optional<uint64_t> GetSizeForStorageKey(
const blink::StorageKey& storage_key,
const base::Time begin = base::Time::Min(),
const base::Time end = base::Time::Max());
std::optional<uint64_t> GetSizeForTimeFrame(const base::Time begin,
const base::Time end);
CdmStorageKeyUsageSize GetUsagePerAllStorageKeys(
const base::Time begin = base::Time::Min(),
const base::Time end = base::Time::Max());
bool DeleteFile(const blink::StorageKey& storage_key,
const media::CdmType& cdm_type,
const std::string& file_name);
bool DeleteData(
const StoragePartition::StorageKeyMatcherFunction& storage_key_matcher,
const blink::StorageKey& storage_key,
const base::Time begin = base::Time::Min(),
const base::Time end = base::Time::Max());
bool ClearDatabase();
uint64_t GetDatabaseSize();
void CloseDatabaseForTesting();
private:
bool DeleteDataForFilter(
StoragePartition::StorageKeyMatcherFunction storage_key_matcher,
const base::Time begin,
const base::Time end);
bool DeleteDataForStorageKey(const blink::StorageKey& storage_key,
const base::Time begin,
const base::Time end);
bool DeleteDataForTimeFrame(const base::Time begin, const base::Time end);
// On a delete operation, check if database is empty. If empty, then clear the
// database.
bool DeleteIfEmptyDatabase(bool last_operation_success);
// Opens and sets up a database if one is not already set up.
CdmStorageOpenError OpenDatabase(bool is_retry = false);
bool UpgradeDatabaseSchema(sql::MetaTable* meta_table);
void OnDatabaseError(int error, sql::Statement* stmt);
bool in_memory() const { return path_.empty(); }
SEQUENCE_CHECKER(sequence_checker_);
// Empty if the database is in-memory.
const base::FilePath path_;
// A descriptor of the last SQL statement that was executed, used for metrics.
std::optional<std::string> last_operation_;
sql::Database db_ GUARDED_BY_CONTEXT(sequence_checker_);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CDM_STORAGE_DATABASE_H_
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