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/****************************************************************************
**
** Copyright (C) 2020 Alexis Jeandet.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include <utils/optional.h>
#include <QFile>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonValue>
namespace MesonProjectManager {
namespace Internal {
template<typename T>
inline T load(QJsonDocument &&doc);
template<>
inline QJsonArray load<QJsonArray>(QJsonDocument &&doc)
{
return doc.array();
}
template<>
inline QJsonObject load<QJsonObject>(QJsonDocument &&doc)
{
return doc.object();
}
template<typename T>
inline T load(const QJsonValueRef &ref);
template<>
inline QJsonArray load<QJsonArray>(const QJsonValueRef &ref)
{
return ref.toArray();
}
template<>
inline QJsonObject load<QJsonObject>(const QJsonValueRef &ref)
{
return ref.toObject();
}
template<typename T>
inline Utils::optional<T> load(const QString &jsonFile)
{
QFile js(jsonFile);
js.open(QIODevice::ReadOnly | QIODevice::Text);
if (js.isOpen()) {
auto data = js.readAll();
return load<T>(QJsonDocument::fromJson(data));
}
return Utils::nullopt;
}
template<typename T>
inline Utils::optional<T> get(const QJsonObject &obj, const QString &name);
template<>
inline Utils::optional<QJsonArray> get<QJsonArray>(const QJsonObject &obj, const QString &name)
{
if (obj.contains(name)) {
auto child = obj[name];
if (child.isArray())
return child.toArray();
}
return Utils::nullopt;
}
template<>
inline Utils::optional<QJsonObject> get<QJsonObject>(const QJsonObject &obj, const QString &name)
{
if (obj.contains(name)) {
auto child = obj[name];
if (child.isObject())
return child.toObject();
}
return Utils::nullopt;
}
template<typename T, typename... Strings>
inline Utils::optional<T> get(const QJsonObject &obj,
const QString &firstPath,
const Strings &... path)
{
if (obj.contains(firstPath))
return get<T>(obj[firstPath].toObject(), path...);
return Utils::nullopt;
}
} // namespace Internal
} // namespace MesonProjectManager
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