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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 CHROMEOS_ASH_COMPONENTS_TETHER_CONNECTION_PRESERVER_IMPL_H_
#define CHROMEOS_ASH_COMPONENTS_TETHER_CONNECTION_PRESERVER_IMPL_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/timer/timer.h"
#include "base/unguessable_token.h"
#include "chromeos/ash/components/tether/active_host.h"
#include "chromeos/ash/components/tether/connection_preserver.h"
#include "chromeos/ash/components/tether/host_connection.h"
namespace ash {
class NetworkStateHandler;
namespace tether {
class TetherHostResponseRecorder;
// Concrete implementation of ConnectionPreserver.
class ConnectionPreserverImpl : public ConnectionPreserver,
public HostConnection::PayloadListener,
public ActiveHost::Observer {
public:
// The maximum duration of time that a BLE Connection should be preserved.
// A preserved BLE Connection will be torn down if not used within this time.
// If the connection is used for a host connection before this time runs out,
// the Connection will be torn down.
static constexpr const uint32_t kTimeoutSeconds = 60;
ConnectionPreserverImpl(
HostConnection::Factory* host_connection_factory,
NetworkStateHandler* network_state_handler,
ActiveHost* active_host,
TetherHostResponseRecorder* tether_host_response_recorder);
ConnectionPreserverImpl(const ConnectionPreserverImpl&) = delete;
ConnectionPreserverImpl& operator=(const ConnectionPreserverImpl&) = delete;
~ConnectionPreserverImpl() override;
// ConnectionPreserver:
void HandleSuccessfulTetherAvailabilityResponse(
const std::string& device_id) override;
protected:
// HostConnection::PayloadListener:
void OnMessageReceived(std::unique_ptr<MessageWrapper> message) override;
void OnConnectionAttemptFinished(
std::unique_ptr<HostConnection> host_connection);
void OnDisconnected();
// ActiveHost::Observer:
void OnActiveHostChanged(
const ActiveHost::ActiveHostChangeInfo& change_info) override;
private:
friend class ConnectionPreserverImplTest;
bool IsConnectedToInternet();
// Between |preserved_connection_device_id_| and |device_id|, return which is
// the "preferred" preserved Connection, i.e., which is higher priority.
std::string GetPreferredPreservedConnectionDeviceId(
const std::string& device_id);
void SetPreservedConnection(const std::string& device_id);
void RemovePreservedConnectionIfPresent();
void SetTimerForTesting(std::unique_ptr<base::OneShotTimer> timer_for_test);
raw_ptr<HostConnection::Factory> host_connection_factory_;
raw_ptr<NetworkStateHandler> network_state_handler_;
raw_ptr<ActiveHost> active_host_;
raw_ptr<TetherHostResponseRecorder> tether_host_response_recorder_;
std::unique_ptr<base::OneShotTimer> preserved_connection_timer_;
std::string preserved_connection_device_id_;
std::unique_ptr<HostConnection> preserved_host_connection_;
base::WeakPtrFactory<ConnectionPreserverImpl> weak_ptr_factory_{this};
};
} // namespace tether
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_TETHER_CONNECTION_PRESERVER_IMPL_H_
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