blob: 65cf578eab58db2cc06bc36a10e9e2606e822ffb [file] [log] [blame]
// Copyright 2019 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.
#include <memory>
#include <string>
#include "base/callback_forward.h"
#include "base/callback_list.h"
#include "base/macros.h"
#include "remoting/signaling/chromoting_message.pb.h"
#include "remoting/signaling/ftl_services.grpc.pb.h"
namespace remoting {
class GrpcExecutor;
class MessageReceptionChannel;
class OAuthTokenGetter;
class RegistrationManager;
class ScopedGrpcServerStream;
// A class for sending and receiving messages via the FTL API.
class FtlMessagingClient final {
using MessageCallback =
base::RepeatingCallback<void(const std::string& sender_id,
const std::string& sender_registration_id,
const ftl::ChromotingMessage& message)>;
using MessageCallbackList =
base::CallbackList<void(const std::string&,
const std::string&,
const ftl::ChromotingMessage&)>;
using MessageCallbackSubscription = MessageCallbackList::Subscription;
using DoneCallback = base::OnceCallback<void(const grpc::Status& status)>;
// |token_getter| and |registration_manager| must outlive |this|.
FtlMessagingClient(OAuthTokenGetter* token_getter,
RegistrationManager* registration_manager);
// Registers a callback which is run for each new message received.
// Simply delete the returned subscription object to unregister. The
// subscription object must be deleted before |this| is deleted.
std::unique_ptr<MessageCallbackSubscription> RegisterMessageCallback(
const MessageCallback& callback);
// Retrieves messages from the user's inbox over slow path and calls the
// registered MessageCallback on every received message.
// |on_done| is called once the messages have been received and acked on the
// server's inbox.
void PullMessages(DoneCallback on_done);
void SendMessage(const std::string& destination,
const std::string& destination_registration_id,
const ftl::ChromotingMessage& message,
DoneCallback on_done);
// Opens a stream to continuously receive new messages from the server and
// calls the registered MessageCallback once a new message is received.
// |on_ready| is called once the stream is successfully started.
// |on_closed| is called if the stream fails to start, in which case
// |on_ready| will not be called, or when the stream is closed or dropped,
// in which case it is called after |on_ready| is called.
void StartReceivingMessages(base::OnceClosure on_ready,
DoneCallback on_closed);
// Stops the stream for continuously receiving new messages.
void StopReceivingMessages();
// Returns true if the streaming channel is open.
bool IsReceivingMessages();
using Messaging =
friend class FtlMessagingClientTest;
FtlMessagingClient(std::unique_ptr<GrpcExecutor> executor,
RegistrationManager* registration_manager,
std::unique_ptr<MessageReceptionChannel> channel);
void OnPullMessagesResponse(DoneCallback on_done,
const grpc::Status& status,
const ftl::PullMessagesResponse& response);
void OnSendMessageResponse(DoneCallback on_done,
const grpc::Status& status,
const ftl::InboxSendResponse& response);
void AckMessages(const ftl::AckMessagesRequest& request,
DoneCallback on_done);
void OnAckMessagesResponse(DoneCallback on_done,
const grpc::Status& status,
const ftl::AckMessagesResponse& response);
std::unique_ptr<ScopedGrpcServerStream> OpenReceiveMessagesStream(
const base::RepeatingCallback<void(const ftl::ReceiveMessagesResponse&)>&
base::OnceCallback<void(const grpc::Status&)> on_channel_closed);
void RunMessageCallbacks(const ftl::InboxMessage& message);
void OnMessageReceived(const ftl::InboxMessage& message);
std::unique_ptr<GrpcExecutor> executor_;
RegistrationManager* registration_manager_;
std::unique_ptr<Messaging::Stub> messaging_stub_;
std::unique_ptr<MessageReceptionChannel> reception_channel_;
MessageCallbackList callback_list_;
} // namespace remoting