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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 COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_SALT_SERVICE_H_
#define COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_SALT_SERVICE_H_
#include <string>
#include <vector>
#include "base/feature_list.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/sequence_bound.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/media_device_salt/media_device_salt_database.h"
#include "content/public/browser/storage_partition.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
class PrefService;
namespace media_device_salt {
BASE_DECLARE_FEATURE(kMediaDeviceIdPartitioning);
class MediaDeviceIDSalt;
// Service that manages salts used to generate media device IDs.
class MediaDeviceSaltService : public KeyedService {
public:
explicit MediaDeviceSaltService(PrefService* pref_service,
const base::FilePath& path);
~MediaDeviceSaltService() override;
MediaDeviceSaltService(const MediaDeviceSaltService&) = delete;
MediaDeviceSaltService& operator=(const MediaDeviceSaltService&) = delete;
// Returns the salt for the given `storage_ket` via `callback`.
void GetSalt(const blink::StorageKey& storage_key,
base::OnceCallback<void(const std::string&)> callback);
// Deletes salts in the given time range whose storage keys match the given
// `matcher`. If `matcher` is null, all entries in the given time range are
// deleted. `done_closure` is invoked after the operation is complete.
void DeleteSalts(base::Time delete_begin,
base::Time delete_end,
content::StoragePartition::StorageKeyMatcherFunction matcher,
base::OnceClosure done_closure);
// Deletes the salt for the given `storage_key`. `done_closure` is invoked
// after the operation is complete.
void DeleteSalt(const blink::StorageKey& storage_key,
base::OnceClosure done_closure);
// Returns all the storage keys that have an associated salt (via `callback`).
void GetAllStorageKeys(
base::OnceCallback<void(std::vector<blink::StorageKey>)> callback);
private:
void FinalizeGetSalt(base::OnceCallback<void(const std::string&)> callback,
std::optional<std::string> new_salt);
void FinalizeDeleteSalts(base::OnceClosure done_closure);
void FinalizeGetAllStorageKeys(
base::OnceCallback<void(std::vector<blink::StorageKey>)> callback,
std::vector<blink::StorageKey> storage_keys);
// TODO(crbug.com/40922096): Remove these operations.
std::string GetGlobalSalt();
void ResetGlobalSalt();
// Ephemeral salt for opaque origins or if the database is broken.
std::string fallback_salt_;
base::Time fallback_salt_creation_time_;
// TODO(crbug.com/40922096): Remove these two fields.
const scoped_refptr<MediaDeviceIDSalt> media_device_id_salt_;
const raw_ptr<PrefService> pref_service_;
SEQUENCE_CHECKER(sequence_checker_);
base::SequenceBound<MediaDeviceSaltDatabase> db_
GUARDED_BY_CONTEXT(sequence_checker_);
base::WeakPtrFactory<MediaDeviceSaltService> weak_factory_
GUARDED_BY_CONTEXT(sequence_checker_){this};
};
} // namespace media_device_salt
#endif // COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_SALT_SERVICE_H_
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