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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_H_
#define COMPONENTS_MIRRORING_SERVICE_RPC_DISPATCHER_H_
#include <stdint.h>
#include <vector>
#include "base/component_export.h"
#include "base/containers/span.h"
#include "base/functional/callback.h"
namespace mirroring {
// Abstract interface for dispatching inbound and outbound RPC messages.
class COMPONENT_EXPORT(MIRRORING_SERVICE) RpcDispatcher {
public:
RpcDispatcher() = default;
RpcDispatcher(const RpcDispatcher&) = delete;
RpcDispatcher(RpcDispatcher&&) = delete;
RpcDispatcher& operator=(const RpcDispatcher&) = delete;
RpcDispatcher& operator=(RpcDispatcher&&) = delete;
virtual ~RpcDispatcher() = default;
using ResponseCallback =
base::RepeatingCallback<void(const std::vector<uint8_t>& response)>;
// 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 RpcDispatcher is instantiated.
virtual void Subscribe(ResponseCallback callback) = 0;
virtual void Unsubscribe() = 0;
// 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.
virtual bool SendOutboundMessage(base::span<const uint8_t> message) = 0;
};
} // namespace mirroring
#endif // COMPONENTS_MIRRORING_SERVICE_RPC_DISPATCHER_H_
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