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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_MIRRORING_SERVICE_RPC_DISPATCHER_IMPL_H_
#define COMPONENTS_MIRRORING_SERVICE_RPC_DISPATCHER_IMPL_H_
#include <stdint.h>
#include "base/component_export.h"
#include "base/containers/span.h"
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ref.h"
#include "components/mirroring/service/rpc_dispatcher.h"
#include "third_party/openscreen/src/cast/streaming/public/receiver_message.h"
#include "third_party/openscreen/src/cast/streaming/public/session_messenger.h"
#include "third_party/openscreen/src/cast/streaming/sender_message.h"
#include "third_party/openscreen/src/platform/base/error.h"
namespace mirroring {
// Service for dispatching inbound and outbound RPC messages using an
// openscreen::cast::SenderSessionMessenger.
class COMPONENT_EXPORT(MIRRORING_SERVICE) RpcDispatcherImpl
: public RpcDispatcher {
public:
explicit RpcDispatcherImpl(
openscreen::cast::SenderSessionMessenger& messenger);
RpcDispatcherImpl(const RpcDispatcherImpl&) = delete;
RpcDispatcherImpl(RpcDispatcherImpl&&) = delete;
RpcDispatcherImpl& operator=(const RpcDispatcherImpl&) = delete;
RpcDispatcherImpl& operator=(RpcDispatcherImpl&&) = delete;
~RpcDispatcherImpl() override;
// Handles registration for RPC messages. Currently only one callback that
// receives all RPC messages is allowed. Multiple calls to `Subscribe` will
// overwrite the currently set callback. Callbacks should be executed
// on the same sequence that RpcDispatcherImpl is instantiated.
void Subscribe(ResponseCallback callback) final;
void Unsubscribe() final;
// Requests to send outbound `message` to the remoting implementation on the
// receiver. The message is routed based on the already encoded RPC message
// `handle`.
//
// Returns `true` if the message was sent (or queued to be sent
// asynchronously) successfully.
bool SendOutboundMessage(base::span<const uint8_t> message) final;
private:
FRIEND_TEST_ALL_PREFIXES(RpcDispatcherImplTest, ReceivesMessages);
void OnMessage(
openscreen::ErrorOr<openscreen::cast::ReceiverMessage> message);
raw_ref<openscreen::cast::SenderSessionMessenger> messenger_;
ResponseCallback callback_;
};
} // namespace mirroring
#endif // COMPONENTS_MIRRORING_SERVICE_RPC_DISPATCHER_IMPL_H_
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