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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_SIGNALING_FTL_SIGNAL_STRATEGY_H_
#define REMOTING_SIGNALING_FTL_SIGNAL_STRATEGY_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "remoting/signaling/signal_strategy.h"
namespace network {
class SharedURLLoaderFactory;
} // namespace network
namespace remoting {
class FtlDeviceIdProvider;
class MessagingClient;
class RegistrationManager;
class SignalingTracker;
class OAuthTokenGetter;
// FtlSignalStrategy implements SignalStrategy using the FTL messaging service.
// This class can be created on a different sequence from the one it is used
// (when Connect() is called).
class FtlSignalStrategy : public SignalStrategy {
public:
// We take unique_ptr<OAuthTokenGetter> here so that we still have a chance to
// send out pending requests after the instance is deleted.
// |signaling_tracker| is nullable; if it's non-null, it must outlive |this|.
FtlSignalStrategy(
std::unique_ptr<OAuthTokenGetter> oauth_token_getter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
std::unique_ptr<FtlDeviceIdProvider> device_id_provider,
SignalingTracker* signaling_tracker = nullptr);
FtlSignalStrategy(const FtlSignalStrategy&) = delete;
FtlSignalStrategy& operator=(const FtlSignalStrategy&) = delete;
// Note that pending outgoing messages will be silently dropped when the
// signal strategy is being deleted. If you want to send last minute messages,
// consider calling Disconnect() then posting a delayed task to delete the
// strategy.
~FtlSignalStrategy() override;
// SignalStrategy interface.
void Connect() override;
void Disconnect() override;
State GetState() const override;
Error GetError() const override;
const SignalingAddress& GetLocalAddress() const override;
void AddListener(Listener* listener) override;
void RemoveListener(Listener* listener) override;
bool SendStanza(std::unique_ptr<jingle_xmpp::XmlElement> stanza) override;
bool SendMessage(const SignalingAddress& destination_address,
const ftl::ChromotingMessage& message) override;
std::string GetNextId() override;
bool IsSignInError() const override;
private:
friend class FtlSignalStrategyTest;
FtlSignalStrategy(std::unique_ptr<OAuthTokenGetter> oauth_token_getter,
std::unique_ptr<RegistrationManager> registration_manager,
std::unique_ptr<MessagingClient> messaging_client);
void CreateCore(std::unique_ptr<OAuthTokenGetter> oauth_token_getter,
std::unique_ptr<RegistrationManager> registration_manager,
std::unique_ptr<MessagingClient> messaging_client);
// This ensures that even if a Listener deletes the current instance during
// OnSignalStrategyIncomingStanza(), we can delete |core_| asynchronously.
class Core;
std::unique_ptr<Core> core_;
};
} // namespace remoting
#endif // REMOTING_SIGNALING_FTL_SIGNAL_STRATEGY_H_
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