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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/JsonArraySerializer.h>
#include <AK/Try.h>
#ifndef KERNEL
# include <AK/JsonValue.h>
#endif
namespace AK {
template<typename Builder>
class JsonObjectSerializer {
public:
static ErrorOr<JsonObjectSerializer> try_create(Builder& builder)
{
if constexpr (IsLegacyBuilder<Builder>)
TRY(builder.try_append('{'));
else
TRY(builder.append('{'));
return JsonObjectSerializer { builder };
}
JsonObjectSerializer(JsonObjectSerializer&& other)
: m_builder(other.m_builder)
, m_empty(other.m_empty)
, m_finished(exchange(other.m_finished, true))
{
}
JsonObjectSerializer(JsonObjectSerializer const&) = delete;
~JsonObjectSerializer()
{
VERIFY(m_finished);
}
#ifndef KERNEL
ErrorOr<void> add(StringView key, JsonValue const& value)
{
TRY(begin_item(key));
value.serialize(m_builder);
return {};
}
#endif
ErrorOr<void> add(StringView key, StringView value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>) {
TRY(m_builder.try_append('"'));
TRY(m_builder.try_append_escaped_for_json(value));
TRY(m_builder.try_append('"'));
} else {
TRY(m_builder.append('"'));
TRY(m_builder.append_escaped_for_json(value));
TRY(m_builder.append('"'));
}
return {};
}
#ifndef KERNEL
ErrorOr<void> add(StringView key, String const& value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>) {
TRY(m_builder.try_append('"'));
TRY(m_builder.try_append_escaped_for_json(value));
TRY(m_builder.try_append('"'));
} else {
TRY(m_builder.append('"'));
TRY(m_builder.append_escaped_for_json(value));
TRY(m_builder.append('"'));
}
return {};
}
#endif
ErrorOr<void> add(StringView key, char const* value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>) {
TRY(m_builder.try_append('"'));
TRY(m_builder.try_append_escaped_for_json({ value, strlen(value) }));
TRY(m_builder.try_append('"'));
} else {
TRY(m_builder.append('"'));
TRY(m_builder.append_escaped_for_json({ value, strlen(value) }));
TRY(m_builder.append('"'));
}
return {};
}
ErrorOr<void> add(StringView key, bool value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_append(value ? "true"sv : "false"sv));
else
TRY(m_builder.append(value ? "true"sv : "false"sv));
return {};
}
ErrorOr<void> add(StringView key, int value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, unsigned value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, long value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, long unsigned value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, long long value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, long long unsigned value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
#ifndef KERNEL
ErrorOr<void> add(StringView key, float value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(StringView key, double value)
{
TRY(begin_item(key));
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
#endif
ErrorOr<JsonArraySerializer<Builder>> add_array(StringView key)
{
TRY(begin_item(key));
return JsonArraySerializer<Builder>::try_create(m_builder);
}
ErrorOr<JsonObjectSerializer<Builder>> add_object(StringView key)
{
TRY(begin_item(key));
return JsonObjectSerializer::try_create(m_builder);
}
ErrorOr<void> finish()
{
VERIFY(!m_finished);
m_finished = true;
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_append('}'));
else
TRY(m_builder.append('}'));
return {};
}
private:
explicit JsonObjectSerializer(Builder& builder)
: m_builder(builder)
{
}
ErrorOr<void> begin_item(StringView key)
{
VERIFY(!m_finished);
if (!m_empty) {
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_append(','));
else
TRY(m_builder.append(','));
}
m_empty = false;
if constexpr (IsLegacyBuilder<Builder>) {
TRY(m_builder.try_append('"'));
TRY(m_builder.try_append_escaped_for_json(key));
TRY(m_builder.try_append("\":"sv));
} else {
TRY(m_builder.append('"'));
TRY(m_builder.append_escaped_for_json(key));
TRY(m_builder.append("\":"sv));
}
return {};
}
Builder& m_builder;
bool m_empty { true };
bool m_finished { false };
};
// Template magic to allow for JsonObjectSerializer<>::try_create(...) - Blame CxByte
template<>
struct JsonObjectSerializer<void> {
template<typename Builder>
static ErrorOr<JsonObjectSerializer<Builder>> try_create(Builder& builder)
{
return JsonObjectSerializer<Builder>::try_create(builder);
}
};
template<typename Builder>
ErrorOr<JsonObjectSerializer<Builder>> JsonArraySerializer<Builder>::add_object()
{
TRY(begin_item());
return JsonObjectSerializer<Builder>::try_create(m_builder);
}
}
using AK::JsonObjectSerializer;
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