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// Copyright 2017 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_KEEP_ALIVE_OPERATION_H_
#define CHROMEOS_ASH_COMPONENTS_TETHER_KEEP_ALIVE_OPERATION_H_
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "base/time/clock.h"
#include "base/time/time.h"
#include "chromeos/ash/components/tether/message_transfer_operation.h"
namespace ash::tether {
// Operation which sends a keep-alive message to a tether host and receives an
// update about the host's status.
class KeepAliveOperation : public MessageTransferOperation {
public:
class Factory {
public:
static std::unique_ptr<KeepAliveOperation> Create(
const TetherHost& tether_host,
raw_ptr<HostConnection::Factory> host_connection_factory);
static void SetFactoryForTesting(Factory* factory);
protected:
virtual ~Factory();
virtual std::unique_ptr<KeepAliveOperation> CreateInstance(
const TetherHost& tether_host,
raw_ptr<HostConnection::Factory> host_connection_factory) = 0;
private:
static Factory* factory_instance_;
};
class Observer {
public:
// |device_status| points to a valid DeviceStatus if the operation completed
// successfully and is null if the operation was not successful.
virtual void OnOperationFinished(
std::unique_ptr<DeviceStatus> device_status) = 0;
};
KeepAliveOperation(const KeepAliveOperation&) = delete;
KeepAliveOperation& operator=(const KeepAliveOperation&) = delete;
~KeepAliveOperation() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
protected:
KeepAliveOperation(const TetherHost& tether_host,
raw_ptr<HostConnection::Factory> host_connection_factory);
// MessageTransferOperation:
void OnDeviceAuthenticated() override;
void OnMessageReceived(
std::unique_ptr<MessageWrapper> message_wrapper) override;
void OnOperationFinished() override;
MessageType GetMessageTypeForConnection() override;
std::unique_ptr<DeviceStatus> device_status_;
private:
friend class KeepAliveOperationTest;
FRIEND_TEST_ALL_PREFIXES(KeepAliveOperationTest,
SendsKeepAliveTickleAndReceivesResponse);
FRIEND_TEST_ALL_PREFIXES(KeepAliveOperationTest, NotifiesObserversOnResponse);
FRIEND_TEST_ALL_PREFIXES(KeepAliveOperationTest, RecordsResponseDuration);
void SetClockForTest(base::Clock* clock_for_test);
raw_ptr<base::Clock> clock_;
base::ObserverList<Observer>::Unchecked observer_list_;
base::Time keep_alive_tickle_request_start_time_;
};
} // namespace ash::tether
#endif // CHROMEOS_ASH_COMPONENTS_TETHER_KEEP_ALIVE_OPERATION_H_
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