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// Copyright (C) 2020 Alexis Jeandet.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#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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