sneedmc/launcher/Json.cpp
Sefa Eyeoglu 3b4539de79
chore: update license headers
Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
2022-07-10 12:19:15 +02:00

294 lines
7.9 KiB
C++

// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Json.h"
#include <QFile>
#include "FileSystem.h"
#include <math.h>
namespace Json
{
void write(const QJsonDocument &doc, const QString &filename)
{
FS::write(filename, doc.toJson());
}
void write(const QJsonObject &object, const QString &filename)
{
write(QJsonDocument(object), filename);
}
void write(const QJsonArray &array, const QString &filename)
{
write(QJsonDocument(array), filename);
}
QByteArray toText(const QJsonObject &obj)
{
return QJsonDocument(obj).toJson(QJsonDocument::Compact);
}
QByteArray toText(const QJsonArray &array)
{
return QJsonDocument(array).toJson(QJsonDocument::Compact);
}
static bool isBinaryJson(const QByteArray &data)
{
decltype(QJsonDocument::BinaryFormatTag) tag = QJsonDocument::BinaryFormatTag;
return memcmp(data.constData(), &tag, sizeof(QJsonDocument::BinaryFormatTag)) == 0;
}
QJsonDocument requireDocument(const QByteArray &data, const QString &what)
{
if (isBinaryJson(data))
{
// FIXME: Is this needed?
throw JsonException(what + ": Invalid JSON. Binary JSON unsupported");
}
else
{
QJsonParseError error;
QJsonDocument doc = QJsonDocument::fromJson(data, &error);
if (error.error != QJsonParseError::NoError)
{
throw JsonException(what + ": Error parsing JSON: " + error.errorString());
}
return doc;
}
}
QJsonDocument requireDocument(const QString &filename, const QString &what)
{
return requireDocument(FS::read(filename), what);
}
QJsonObject requireObject(const QJsonDocument &doc, const QString &what)
{
if (!doc.isObject())
{
throw JsonException(what + " is not an object");
}
return doc.object();
}
QJsonArray requireArray(const QJsonDocument &doc, const QString &what)
{
if (!doc.isArray())
{
throw JsonException(what + " is not an array");
}
return doc.array();
}
void writeString(QJsonObject &to, const QString &key, const QString &value)
{
if (!value.isEmpty())
{
to.insert(key, value);
}
}
void writeStringList(QJsonObject &to, const QString &key, const QStringList &values)
{
if (!values.isEmpty())
{
QJsonArray array;
for(auto value: values)
{
array.append(value);
}
to.insert(key, array);
}
}
template<>
QJsonValue toJson<QUrl>(const QUrl &url)
{
return QJsonValue(url.toString(QUrl::FullyEncoded));
}
template<>
QJsonValue toJson<QByteArray>(const QByteArray &data)
{
return QJsonValue(QString::fromLatin1(data.toHex()));
}
template<>
QJsonValue toJson<QDateTime>(const QDateTime &datetime)
{
return QJsonValue(datetime.toString(Qt::ISODate));
}
template<>
QJsonValue toJson<QDir>(const QDir &dir)
{
return QDir::current().relativeFilePath(dir.absolutePath());
}
template<>
QJsonValue toJson<QUuid>(const QUuid &uuid)
{
return uuid.toString();
}
template<>
QJsonValue toJson<QVariant>(const QVariant &variant)
{
return QJsonValue::fromVariant(variant);
}
template<> QByteArray requireIsType<QByteArray>(const QJsonValue &value, const QString &what)
{
const QString string = ensureIsType<QString>(value, what);
// ensure that the string can be safely cast to Latin1
if (string != QString::fromLatin1(string.toLatin1()))
{
throw JsonException(what + " is not encodable as Latin1");
}
return QByteArray::fromHex(string.toLatin1());
}
template<> QJsonArray requireIsType<QJsonArray>(const QJsonValue &value, const QString &what)
{
if (!value.isArray())
{
throw JsonException(what + " is not an array");
}
return value.toArray();
}
template<> QString requireIsType<QString>(const QJsonValue &value, const QString &what)
{
if (!value.isString())
{
throw JsonException(what + " is not a string");
}
return value.toString();
}
template<> bool requireIsType<bool>(const QJsonValue &value, const QString &what)
{
if (!value.isBool())
{
throw JsonException(what + " is not a bool");
}
return value.toBool();
}
template<> double requireIsType<double>(const QJsonValue &value, const QString &what)
{
if (!value.isDouble())
{
throw JsonException(what + " is not a double");
}
return value.toDouble();
}
template<> int requireIsType<int>(const QJsonValue &value, const QString &what)
{
const double doubl = requireIsType<double>(value, what);
if (fmod(doubl, 1) != 0)
{
throw JsonException(what + " is not an integer");
}
return int(doubl);
}
template<> QDateTime requireIsType<QDateTime>(const QJsonValue &value, const QString &what)
{
const QString string = requireIsType<QString>(value, what);
const QDateTime datetime = QDateTime::fromString(string, Qt::ISODate);
if (!datetime.isValid())
{
throw JsonException(what + " is not a ISO formatted date/time value");
}
return datetime;
}
template<> QUrl requireIsType<QUrl>(const QJsonValue &value, const QString &what)
{
const QString string = ensureIsType<QString>(value, what);
if (string.isEmpty())
{
return QUrl();
}
const QUrl url = QUrl(string, QUrl::StrictMode);
if (!url.isValid())
{
throw JsonException(what + " is not a correctly formatted URL");
}
return url;
}
template<> QDir requireIsType<QDir>(const QJsonValue &value, const QString &what)
{
const QString string = requireIsType<QString>(value, what);
// FIXME: does not handle invalid characters!
return QDir::current().absoluteFilePath(string);
}
template<> QUuid requireIsType<QUuid>(const QJsonValue &value, const QString &what)
{
const QString string = requireIsType<QString>(value, what);
const QUuid uuid = QUuid(string);
if (uuid.toString() != string) // converts back => valid
{
throw JsonException(what + " is not a valid UUID");
}
return uuid;
}
template<> QJsonObject requireIsType<QJsonObject>(const QJsonValue &value, const QString &what)
{
if (!value.isObject())
{
throw JsonException(what + " is not an object");
}
return value.toObject();
}
template<> QVariant requireIsType<QVariant>(const QJsonValue &value, const QString &what)
{
if (value.isNull() || value.isUndefined())
{
throw JsonException(what + " is null or undefined");
}
return value.toVariant();
}
template<> QJsonValue requireIsType<QJsonValue>(const QJsonValue &value, const QString &what)
{
if (value.isNull() || value.isUndefined())
{
throw JsonException(what + " is null or undefined");
}
return value;
}
}