ladybird/AK/JsonValue.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2024, Dan Klishch <danilklishch@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonParser.h>
#include <AK/JsonValue.h>
#include <AK/StringView.h>
namespace AK {
namespace {
using JsonValueStorage = Variant<
Empty,
bool,
i64,
u64,
double,
ByteString,
NonnullOwnPtr<JsonArray>,
NonnullOwnPtr<JsonObject>>;
static ErrorOr<JsonValueStorage> clone(JsonValueStorage const& other)
{
return other.visit(
[](NonnullOwnPtr<JsonArray> const& value) -> ErrorOr<JsonValueStorage> {
return TRY(try_make<JsonArray>(*value));
},
[](NonnullOwnPtr<JsonObject> const& value) -> ErrorOr<JsonValueStorage> {
return TRY(try_make<JsonObject>(*value));
},
[](auto const& value) -> ErrorOr<JsonValueStorage> { return JsonValueStorage(value); });
}
}
JsonValue::JsonValue() = default;
JsonValue::~JsonValue() = default;
JsonValue::JsonValue(JsonValue&&) = default;
JsonValue& JsonValue::operator=(JsonValue&&) = default;
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JsonValue::JsonValue(JsonValue const& other)
: m_value(MUST(clone(other.m_value)))
{
}
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JsonValue& JsonValue::operator=(JsonValue const& other)
{
if (this != &other)
m_value = MUST(clone(other.m_value));
return *this;
}
JsonValue& JsonValue::operator=(JsonArray const& other)
{
return *this = JsonValue(other);
}
JsonValue& JsonValue::operator=(JsonArray&& other)
{
return *this = JsonValue(other);
}
JsonValue& JsonValue::operator=(JsonObject const& other)
{
return *this = JsonValue(other);
}
JsonValue& JsonValue::operator=(JsonObject&& other)
{
return *this = JsonValue(other);
}
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bool JsonValue::equals(JsonValue const& other) const
{
if (is_null() && other.is_null())
return true;
if (is_bool() && other.is_bool() && as_bool() == other.as_bool())
return true;
if (is_string() && other.is_string() && as_string() == other.as_string())
return true;
if (is_number() && other.is_number()) {
auto normalize = [](Variant<u64, i64, double> representation, bool& is_negative) {
return representation.visit(
[&](u64& value) -> Variant<u64, double> {
is_negative = false;
return value;
},
[&](i64& value) -> Variant<u64, double> {
is_negative = value < 0;
return static_cast<u64>(abs(value));
},
[&](double& value) -> Variant<u64, double> {
is_negative = value < 0;
value = abs(value);
if (static_cast<double>(static_cast<u64>(value)) == value)
return static_cast<u64>(value);
return value;
});
};
bool is_this_negative;
auto normalized_this = normalize(as_number(), is_this_negative);
bool is_that_negative;
auto normalized_that = normalize(other.as_number(), is_that_negative);
return is_this_negative == is_that_negative && normalized_this == normalized_that;
}
if (is_array() && other.is_array() && as_array().size() == other.as_array().size()) {
bool result = true;
for (size_t i = 0; i < as_array().size(); ++i) {
result &= as_array().at(i).equals(other.as_array().at(i));
}
return result;
}
if (is_object() && other.is_object() && as_object().size() == other.as_object().size()) {
bool result = true;
as_object().for_each_member([&](auto& key, auto& value) {
auto other_value = other.as_object().get(key);
if (other_value.has_value())
result &= value.equals(*other_value);
else
result = false;
});
return result;
}
return false;
}
JsonValue::JsonValue(int value)
: m_value(i64 { value })
{
}
JsonValue::JsonValue(unsigned value)
: m_value(i64 { value })
{
}
JsonValue::JsonValue(long value)
: m_value(i64 { value })
{
}
JsonValue::JsonValue(unsigned long value)
: m_value(u64 { value })
{
}
JsonValue::JsonValue(long long value)
: m_value(i64 { value })
{
}
JsonValue::JsonValue(long long unsigned value)
: m_value(u64 { value })
{
}
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JsonValue::JsonValue(char const* cstring)
: m_value(ByteString { cstring })
{
}
JsonValue::JsonValue(double value)
: m_value(double { value })
{
}
JsonValue::JsonValue(ByteString const& value)
: m_value(value)
{
}
JsonValue::JsonValue(StringView value)
: m_value(ByteString { value })
{
}
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JsonValue::JsonValue(JsonObject const& value)
: m_value(make<JsonObject>(value))
{
}
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JsonValue::JsonValue(JsonArray const& value)
: m_value(make<JsonArray>(value))
{
}
JsonValue::JsonValue(JsonObject&& value)
: m_value(make<JsonObject>(value))
{
}
JsonValue::JsonValue(JsonArray&& value)
: m_value(make<JsonArray>(value))
{
}
ErrorOr<JsonValue> JsonValue::from_string(StringView input)
{
return JsonParser(input).parse();
}
}