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https://github.com/LadybirdBrowser/ladybird.git
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e1ed8722e0
This is just to help make the message handlers a bit briefer. I had considered adding a TRY-like macro to auto-return when the lookup fails, but since statement expressions cannot return references, that would result in a copy of all e.g. object and array lookups.
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Badge.h>
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#include <AK/JsonObject.h>
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#include <AK/Optional.h>
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#include <AK/RefCounted.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <AK/WeakPtr.h>
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#include <AK/Weakable.h>
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#include <LibDevTools/Forward.h>
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namespace DevTools {
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class Actor
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: public RefCounted<Actor>
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, public Weakable<Actor> {
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public:
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virtual ~Actor();
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String const& name() const { return m_name; }
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virtual void handle_message(StringView type, JsonObject const&) = 0;
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class [[nodiscard]] BlockToken {
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public:
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BlockToken(Badge<Actor>, Actor&);
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~BlockToken();
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BlockToken(BlockToken const&) = delete;
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BlockToken& operator=(BlockToken const&) = delete;
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BlockToken(BlockToken&&);
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BlockToken& operator=(BlockToken&&);
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private:
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WeakPtr<Actor> m_actor;
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};
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void send_message(JsonObject, Optional<BlockToken> block_token = {});
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void send_missing_parameter_error(StringView parameter);
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void send_unrecognized_packet_type_error(StringView type);
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void send_unknown_actor_error(StringView actor);
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protected:
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explicit Actor(DevToolsServer&, String name);
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DevToolsServer& devtools() { return m_devtools; }
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DevToolsServer const& devtools() const { return m_devtools; }
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BlockToken block_responses();
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template<typename ParameterType>
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auto get_required_parameter(JsonObject const& message, StringView parameter)
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{
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auto result = [&]() {
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if constexpr (IsIntegral<ParameterType>)
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return message.get_integer<ParameterType>(parameter);
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else if constexpr (IsSame<ParameterType, bool>)
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return message.get_bool(parameter);
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else if constexpr (IsSame<ParameterType, String>)
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return message.get_string(parameter);
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else if constexpr (IsSame<ParameterType, JsonObject>)
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return message.get_object(parameter);
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else if constexpr (IsSame<ParameterType, JsonArray>)
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return message.get_array(parameter);
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else
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static_assert(DependentFalse<ParameterType>);
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}();
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if (!result.has_value())
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send_missing_parameter_error(parameter);
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return result;
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}
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private:
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DevToolsServer& m_devtools;
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String m_name;
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Vector<JsonObject> m_blocked_responses;
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bool m_block_responses { false };
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};
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}
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