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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_NEARBY_SHARING_INSTANTMESSAGING_RECEIVE_MESSAGES_EXPRESS_H_
#define CHROME_BROWSER_NEARBY_SHARING_INSTANTMESSAGING_RECEIVE_MESSAGES_EXPRESS_H_
#include <cstdint>
#include <string_view>
#include "base/functional/callback_forward.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/timer/timer.h"
#include "chrome/browser/nearby_sharing/instantmessaging/proto/instantmessaging.pb.h"
#include "chrome/browser/nearby_sharing/instantmessaging/stream_parser.h"
#include "chrome/browser/nearby_sharing/instantmessaging/token_fetcher.h"
#include "chromeos/ash/services/nearby/public/mojom/webrtc_signaling_messenger.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/network/public/cpp/simple_url_loader_stream_consumer.h"
namespace chrome_browser_nearby_sharing_instantmessaging {
class ReceiveMessagesExpressRequest;
} // namespace chrome_browser_nearby_sharing_instantmessaging
namespace network {
class SharedURLLoaderFactory;
class SimpleURLLoader;
} // namespace network
namespace signin {
class IdentityManager;
} // namespace signin
// Receives streaming messages from Instant Messaging API over HTTP. Responsible
// for parsing incoming bytes into valid ReceivesMessagesExpressResponse
// messages.
class ReceiveMessagesExpress : public sharing::mojom::ReceiveMessagesSession,
public network::SimpleURLLoaderStreamConsumer {
public:
using SuccessCallback = base::OnceCallback<void(bool success)>;
using StartReceivingMessagesCallback =
sharing::mojom::WebRtcSignalingMessenger::StartReceivingMessagesCallback;
static void StartReceiveSession(
const std::string& self_id,
sharing::mojom::LocationHintPtr location_hint,
mojo::PendingRemote<sharing::mojom::IncomingMessagesListener>
incoming_messages_listener,
StartReceivingMessagesCallback callback,
signin::IdentityManager* identity_manager,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
~ReceiveMessagesExpress() override;
// sharing::mojom::ReceiveMessagesSession:
void StopReceivingMessages() override;
private:
ReceiveMessagesExpress(
mojo::PendingRemote<sharing::mojom::IncomingMessagesListener>
incoming_messages_listener,
signin::IdentityManager* identity_manager,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
void StartReceivingMessages(
const chrome_browser_nearby_sharing_instantmessaging::
ReceiveMessagesExpressRequest& request,
StartReceivingMessagesCallback callback,
mojo::PendingRemote<sharing::mojom::ReceiveMessagesSession>
pending_remote_for_result);
void DoStartReceivingMessages(
const chrome_browser_nearby_sharing_instantmessaging::
ReceiveMessagesExpressRequest& request,
const std::string& oauth_token);
void OnFastPathReadyTimeout();
// network::SimpleURLLoaderStreamConsumer:
void OnDataReceived(std::string_view string_piece,
base::OnceClosure resume) override;
void OnComplete(bool success) override;
void OnRetry(base::OnceClosure start_retry) override;
void DelegateMessage(const chrome_browser_nearby_sharing_instantmessaging::
ReceiveMessagesResponse& response);
// StreamParser callbacks:
void OnFastPathReady();
void OnMessageReceived(const std::string& message);
// This method will cause the object to shut down its mojo pipe
// and self destruct. After calling, this object may no longer be valid and
// no further interactions should be done.
void FailSessionAndDestruct(const std::string reason);
StartReceivingMessagesCallback start_receiving_messages_callback_;
mojo::PendingRemote<sharing::mojom::ReceiveMessagesSession>
self_pending_remote_;
mojo::Remote<sharing::mojom::IncomingMessagesListener>
incoming_messages_listener_;
TokenFetcher token_fetcher_;
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
std::unique_ptr<network::SimpleURLLoader> url_loader_;
StreamParser stream_parser_;
base::OneShotTimer fast_path_ready_timeout_timer_;
std::string request_id_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<ReceiveMessagesExpress> weak_ptr_factory_{this};
};
#endif // CHROME_BROWSER_NEARBY_SHARING_INSTANTMESSAGING_RECEIVE_MESSAGES_EXPRESS_H_
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