File indexing completed on 2024-05-12 04:42:43 

0001 /*
0002     SPDX-FileCopyrightText: 2018 Volker Krause <vkrause@kde.org>
0003 
0004     SPDX-License-Identifier: LGPL-2.0-or-later
0005 */
0006 
0007 #ifndef KPUBLICTRANSPORT_JSON_P_H
0008 #define KPUBLICTRANSPORT_JSON_P_H
0009 
0010 #include <QJsonArray>
0011 #include <QJsonObject>
0012 #include <QStringList>
0013 
0014 #include <vector>
0015 
0016 struct QMetaObject;
0017 
0018 namespace KPublicTransport {
0019 
0020 /** De/serialization helper methods. */
0021 namespace Json
0022 {
0023     /** Looks for a translated value in @p obj with @p key. */
0024     QString translatedValue(const QJsonObject &obj, const QString &key);
0025     /** Convert a QJsonValue to a QStringList, assuming it contains an array of strings. */
0026     QStringList toStringList(const QJsonValue &v);
0027 
0028     QJsonObject toJson(const QMetaObject *mo, const void *elem);
0029 
0030     /** Serialize from QMetaObject. */
0031     template <typename T> inline QJsonObject toJson(const T &elem)
0032     {
0033         return toJson(&T::staticMetaObject, &elem);
0034     }
0035 
0036     /** Serialize an array of elements. */
0037     template <typename T> inline QJsonArray toJson(const std::vector<T> &elems)
0038     {
0039         QJsonArray a;
0040         //a.reserve(elems.size());
0041         std::transform(elems.begin(), elems.end(), std::back_inserter(a), QOverload<const T&>::of(&T::toJson));
0042         return a;
0043     }
0044 
0045     void fromJson(const QMetaObject *mo, const QJsonObject &obj, void *elem);
0046 
0047     /** Deserialize via QMetaObject. */
0048     template <typename T> inline T fromJson(const QJsonObject &obj)
0049     {
0050         T elem;
0051         fromJson(&T::staticMetaObject, obj, &elem);
0052         return elem;
0053     }
0054 
0055     /** Deserialize an array of elements. */
0056     template <typename T> inline std::vector<T> fromJson(const QJsonArray &a)
0057     {
0058         std::vector<T> res;
0059         res.reserve(a.size());
0060         std::transform(a.begin(), a.end(), std::back_inserter(res), [](const auto &v) { return T::fromJson(v.toObject()); });
0061         return res;
0062     }
0063 }
0064 
0065 }
0066 
0067 #endif // KPUBLICTRANSPORT_JSON_P_H