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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_QUICK_PAIR_REPOSITORY_FAST_PAIR_SAVED_DEVICE_REGISTRY_H_
#define ASH_QUICK_PAIR_REPOSITORY_FAST_PAIR_SAVED_DEVICE_REGISTRY_H_
#include <optional>
#include <string>
#include <vector>
#include "base/memory/scoped_refptr.h"
#include "base/values.h"
class PrefRegistrySimple;
class PrefService;
namespace device {
class BluetoothAdapter;
} // namespace device
namespace ash {
namespace quick_pair {
// Saves the Fast Pair account key to disk for peripherals that have been
// paired with this device for the active user, using the bluetooth MAC address
// as a lookup key, and user prefs for storage.
class SavedDeviceRegistry {
public:
explicit SavedDeviceRegistry(scoped_refptr<device::BluetoothAdapter> adapter);
SavedDeviceRegistry(const SavedDeviceRegistry&) = delete;
SavedDeviceRegistry& operator=(const SavedDeviceRegistry&) = delete;
~SavedDeviceRegistry();
// Registers preferences used by this class in the provided |registry|.
static void RegisterProfilePrefs(PrefRegistrySimple* registry);
// Saves the account association (|mac_address|, |account_key|) to disk.
// Returns true on success, false on failure.
bool SaveAccountAssociation(const std::string& mac_address,
const std::vector<uint8_t>& account_key);
// Deletes the |mac_address| -> account key record from prefs based on
// |mac address|. Returns true on success, false on failure.
bool DeleteAccountKey(const std::string& mac_address);
// Deletes the mac address -> |account_key| record from prefs based on
// |account_key|. Returns true on success, false on failure.
bool DeleteAccountKey(const std::vector<uint8_t>& account_key);
// Retrieves an account key from disk if available, otherwise returns an
// empty vector.
std::optional<const std::vector<uint8_t>> GetAccountKey(
const std::string& mac_address);
// Checks if the account key is in the registry.
bool IsAccountKeySavedToRegistry(const std::vector<uint8_t>& account_key);
private:
// Cross check the list of devices in the registry with the devices paired
// to the BluetoothAdapter to see if any devices need to be removed from the
// registry if they are no longer paired to the adapter. This can happen if
// a primary user pairs and saves a device to their account, logs out, then a
// secondary user logs in, forgets the device from the Bluetooth pairing
// menu. When the primary user logs back in, we need to reflect the device is
// no longer paired locally in the registry.
void RemoveDevicesIfRemovedFromDifferentUser(PrefService* pref_service);
// Flags cross checking the registry with the devices paired to the adapter
// to see if any devices need to be removed from the registry (see
// |RemoveDevicesIfRemovedFromDifferentUser|). This only needs to happen once
// per session, which is why it is flagged. Everything else following during
// the user session will be immediately reflected here.
bool has_updated_saved_devices_registry_ = false;
scoped_refptr<device::BluetoothAdapter> adapter_;
};
} // namespace quick_pair
} // namespace ash
#endif // ASH_QUICK_PAIR_REPOSITORY_FAST_PAIR_SAVED_DEVICE_REGISTRY_H_
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