mirror of
https://github.com/LadybirdBrowser/ladybird.git
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224 lines
5.7 KiB
C++
224 lines
5.7 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* Copyright (c) 2022, Idan Horowitz <idan.horowitz@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/Error.h>
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#include <AK/JsonValue.h>
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#include <AK/Try.h>
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namespace AK {
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template<typename Builder>
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inline constexpr bool IsLegacyBuilder = requires(Builder builder) { builder.try_append('\0'); };
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template<typename Builder = void>
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class JsonObjectSerializer;
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template<typename Builder = void>
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class JsonArraySerializer {
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public:
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static ErrorOr<JsonArraySerializer> try_create(Builder& builder)
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{
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(builder.try_append('['));
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else
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TRY(builder.append('['));
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return JsonArraySerializer { builder };
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}
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JsonArraySerializer(JsonArraySerializer&& other)
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: m_builder(other.m_builder)
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, m_empty(other.m_empty)
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, m_finished(exchange(other.m_finished, true))
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{
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}
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JsonArraySerializer(JsonArraySerializer const&) = delete;
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ErrorOr<void> add(JsonValue const& value)
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{
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TRY(begin_item());
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value.serialize(m_builder);
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return {};
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}
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ErrorOr<void> add(StringView value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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ErrorOr<void> add(ByteString const& value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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ErrorOr<void> add(char const* value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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ErrorOr<void> add(bool value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(value ? "true"sv : "false"sv));
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else
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TRY(m_builder.append(value ? "true"sv : "false"sv));
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return {};
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}
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ErrorOr<void> add(int value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<void> add(unsigned value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<void> add(long value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<void> add(long unsigned value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<void> add(long long value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<void> add(long long unsigned value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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ErrorOr<JsonArraySerializer<Builder>> add_array()
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{
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TRY(begin_item());
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return JsonArraySerializer::try_create(m_builder);
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}
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// Implemented in JsonObjectSerializer.h
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ErrorOr<JsonObjectSerializer<Builder>> add_object();
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ErrorOr<void> finish()
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{
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VERIFY(!m_finished);
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m_finished = true;
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(']'));
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else
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TRY(m_builder.append(']'));
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return {};
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}
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private:
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explicit JsonArraySerializer(Builder& builder)
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: m_builder(builder)
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{
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}
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ErrorOr<void> begin_item()
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{
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VERIFY(!m_finished);
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if (!m_empty) {
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(','));
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else
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TRY(m_builder.append(','));
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}
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m_empty = false;
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return {};
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}
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Builder& m_builder;
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bool m_empty { true };
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bool m_finished { false };
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};
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// Template magic to allow for JsonArraySerializer<>::try_create(...) - Blame CxByte
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template<>
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struct JsonArraySerializer<void> {
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template<typename Builder>
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static ErrorOr<JsonArraySerializer<Builder>> try_create(Builder& builder)
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{
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return JsonArraySerializer<Builder>::try_create(builder);
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}
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};
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}
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#if USING_AK_GLOBALLY
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using AK::JsonArraySerializer;
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#endif
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