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LibWeb+WebDriver: Add an IPC-transferable Web::WebDriver::Response class
This is essentially an ErrorOr<JsonValue, Web::WebDriver::Error> class. Unfortunately, that ErrorOr would not be default-constructible, which is required for the generated IPC classes. So this is a thin wrapper around a Variant<JsonValue, Web::WebDriver::Error> to emulate ErrorOr.
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7 changed files with 291 additions and 160 deletions
52
Userland/Libraries/LibWeb/WebDriver/Response.h
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52
Userland/Libraries/LibWeb/WebDriver/Response.h
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/*
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* Copyright (c) 2022, Tim Flynn <trflynn89@serenityos.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/JsonValue.h>
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#include <AK/Variant.h>
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#include <LibIPC/Forward.h>
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#include <LibWeb/WebDriver/Error.h>
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namespace Web::WebDriver {
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// FIXME: Ideally, this could be `using Response = ErrorOr<JsonValue, Error>`, but that won't be
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// default-constructible, which is a requirement for the generated IPC.
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struct Response {
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Response() = default;
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Response(JsonValue&&);
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Response(Error&&);
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JsonValue& value() { return m_value_or_error.template get<JsonValue>(); }
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JsonValue const& value() const { return m_value_or_error.template get<JsonValue>(); }
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Error& error() { return m_value_or_error.template get<Error>(); }
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Error const& error() const { return m_value_or_error.template get<Error>(); }
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bool is_error() const { return m_value_or_error.template has<Error>(); }
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JsonValue release_value() { return move(value()); }
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Error release_error() { return move(error()); }
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template<typename... Visitors>
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decltype(auto) visit(Visitors&&... visitors) const
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{
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return m_value_or_error.visit(forward<Visitors>(visitors)...);
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}
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private:
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// Note: Empty is only a possible state until the Response has been decoded by IPC.
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Variant<Empty, JsonValue, Error> m_value_or_error;
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};
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}
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namespace IPC {
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bool encode(Encoder&, Web::WebDriver::Response const&);
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ErrorOr<void> decode(Decoder&, Web::WebDriver::Response&);
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}
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