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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CAST_STANDALONE_SENDER_RECEIVER_CHOOSER_H_
#define CAST_STANDALONE_SENDER_RECEIVER_CHOOSER_H_
#include <functional>
#include <memory>
#include <vector>
#include "cast/common/public/receiver_info.h"
#include "discovery/common/reporting_client.h"
#include "discovery/public/dns_sd_service_factory.h"
#include "discovery/public/dns_sd_service_watcher.h"
#include "platform/api/network_interface.h"
#include "platform/api/serial_delete_ptr.h"
#include "platform/api/task_runner.h"
#include "platform/base/ip_address.h"
#include "util/alarm.h"
#include "util/chrono_helpers.h"
namespace openscreen {
namespace cast {
// Discovers Cast Receivers on the LAN for a given network interface, and
// provides a console menu interface for the user to choose one.
class ReceiverChooser final : public discovery::ReportingClient {
public:
using ResultCallback = std::function<void(IPEndpoint)>;
ReceiverChooser(const InterfaceInfo& interface,
TaskRunner* task_runner,
ResultCallback result_callback);
~ReceiverChooser() final;
private:
// discovery::ReportingClient implementation.
void OnFatalError(Error error) final;
void OnRecoverableError(Error error) final;
// Called from the DnsWatcher with |all| ReceiverInfos any time there is a
// change in the set of discovered devices.
void OnDnsWatcherUpdate(
std::vector<std::reference_wrapper<const ReceiverInfo>> all);
// Called from |menu_alarm_| when it is a good time for the user to choose
// from the discovered-so-far set of Cast Receivers.
void PrintMenuAndHandleChoice();
ResultCallback result_callback_;
SerialDeletePtr<discovery::DnsSdService> service_;
std::unique_ptr<discovery::DnsSdServiceWatcher<ReceiverInfo>> watcher_;
std::vector<ReceiverInfo> discovered_receivers_;
Alarm menu_alarm_;
// After there is another Cast Receiver discovered, ready to show to the user
// via the console menu, how long should the ReceiverChooser wait for
// additional receivers to be discovered and be included in the menu too?
static constexpr auto kWaitForStragglersDelay = seconds(5);
};
} // namespace cast
} // namespace openscreen
#endif // CAST_STANDALONE_SENDER_RECEIVER_CHOOSER_H_
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