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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/Try.h>
#ifndef KERNEL
# include <AK/JsonValue.h>
#endif
namespace AK {
template<typename Builder>
inline constexpr bool IsLegacyBuilder = requires(Builder builder) { builder.try_append('\0'); };
template<typename Builder = void>
class JsonObjectSerializer;
template<typename Builder = void>
class JsonArraySerializer {
public:
static ErrorOr<JsonArraySerializer> try_create(Builder& builder)
{
if constexpr (IsLegacyBuilder<Builder>)
TRY(builder.try_append('['));
else
TRY(builder.append('['));
return JsonArraySerializer { builder };
}
JsonArraySerializer(JsonArraySerializer&& other)
: m_builder(other.m_builder)
, m_empty(other.m_empty)
, m_finished(exchange(other.m_finished, true))
{
}
JsonArraySerializer(JsonArraySerializer const&) = delete;
#ifndef KERNEL
ErrorOr<void> add(JsonValue const& value)
{
TRY(begin_item());
value.serialize(m_builder);
return {};
}
#endif
ErrorOr<void> add(StringView value)
{
TRY(begin_item());
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(String const& value)
{
TRY(begin_item());
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(char const* value)
{
TRY(begin_item());
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 {};
}
ErrorOr<void> add(bool value)
{
TRY(begin_item());
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(int value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(unsigned value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(long value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(long unsigned value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(long long value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<void> add(long long unsigned value)
{
TRY(begin_item());
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_appendff("{}", value));
else
TRY(m_builder.appendff("{}", value));
return {};
}
ErrorOr<JsonArraySerializer<Builder>> add_array()
{
TRY(begin_item());
return JsonArraySerializer::try_create(m_builder);
}
// Implemented in JsonObjectSerializer.h
ErrorOr<JsonObjectSerializer<Builder>> add_object();
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 JsonArraySerializer(Builder& builder)
: m_builder(builder)
{
}
ErrorOr<void> begin_item()
{
VERIFY(!m_finished);
if (!m_empty) {
if constexpr (IsLegacyBuilder<Builder>)
TRY(m_builder.try_append(','));
else
TRY(m_builder.append(','));
}
m_empty = false;
return {};
}
Builder& m_builder;
bool m_empty { true };
bool m_finished { false };
};
// Template magic to allow for JsonArraySerializer<>::try_create(...) - Blame CxByte
template<>
struct JsonArraySerializer<void> {
template<typename Builder>
static ErrorOr<JsonArraySerializer<Builder>> try_create(Builder& builder)
{
return JsonArraySerializer<Builder>::try_create(builder);
}
};
}
using AK::JsonArraySerializer;
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