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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_SCHEDULER_H_
#define CHROMEOS_ASH_COMPONENTS_TETHER_KEEP_ALIVE_SCHEDULER_H_
#include <memory>
#include <optional>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "chromeos/ash/components/tether/active_host.h"
#include "chromeos/ash/components/tether/device_status_util.h"
#include "chromeos/ash/components/tether/host_connection.h"
#include "chromeos/ash/components/tether/keep_alive_operation.h"
namespace ash::tether {
class HostScanCache;
class DeviceIdTetherNetworkGuidMap;
// Schedules keep-alive messages to be sent when this device is connected to a
// remote device's tether hotspot. When a device connects, a keep-alive message
// is sent immediately, then another one is scheduled every 4 minutes until the
// device disconnects.
class KeepAliveScheduler : public ActiveHost::Observer,
public KeepAliveOperation::Observer {
public:
KeepAliveScheduler(
raw_ptr<HostConnection::Factory> host_connection_factory,
ActiveHost* active_host,
HostScanCache* host_scan_cache,
DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map);
KeepAliveScheduler(const KeepAliveScheduler&) = delete;
KeepAliveScheduler& operator=(const KeepAliveScheduler&) = delete;
virtual ~KeepAliveScheduler();
// ActiveHost::Observer:
void OnActiveHostChanged(
const ActiveHost::ActiveHostChangeInfo& change_info) override;
// KeepAliveOperation::Observer:
void OnOperationFinished(
std::unique_ptr<DeviceStatus> device_status) override;
private:
friend class KeepAliveSchedulerTest;
KeepAliveScheduler(
raw_ptr<HostConnection::Factory> host_connection_factory,
ActiveHost* active_host,
HostScanCache* host_scan_cache,
DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map,
std::unique_ptr<base::RepeatingTimer> timer);
void SendKeepAliveTickle();
static const uint32_t kKeepAliveIntervalMinutes;
raw_ptr<HostConnection::Factory> host_connection_factory_;
raw_ptr<ActiveHost> active_host_;
raw_ptr<HostScanCache> host_scan_cache_;
raw_ptr<DeviceIdTetherNetworkGuidMap> device_id_tether_network_guid_map_;
std::unique_ptr<base::RepeatingTimer> timer_;
std::optional<multidevice::RemoteDeviceRef> active_host_device_;
std::unique_ptr<KeepAliveOperation> keep_alive_operation_;
base::WeakPtrFactory<KeepAliveScheduler> weak_ptr_factory_{this};
};
} // namespace ash::tether
#endif // CHROMEOS_ASH_COMPONENTS_TETHER_KEEP_ALIVE_SCHEDULER_H_
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