video-pc/util/jsonmapper.h

#ifndef JSONMAPPER_H
#define JSONMAPPER_H

#include <QDebug>
#include <QJsonArray>
#include <QJsonObject>
#include <QJsonValue>
#include <QMetaProperty>

class JsonMapper
{
public:
    // 从JSON对象映射到任意结构体/类
    template<typename T>
    static T fromJson(const QJsonValue &json)
    {
        T obj;
        if (!json.isObject()) {
            return obj;
        }

        QJsonObject jsonObj = json.toObject();
        const QMetaObject *metaObj = &T::staticMetaObject;

        for (int i = metaObj->propertyOffset(); i < metaObj->propertyCount(); ++i) {
            QMetaProperty prop = metaObj->property(i);
            QString propName = prop.name();

            if (jsonObj.contains(propName)) {
                QVariant value = jsonObj[propName].toVariant();
                if (value.canConvert(prop.type())) {
                    prop.writeOnGadget(&obj, value);
                }
            }
        }

        return obj;
    }

    // 从JSON数组映射到列表
    template<typename T>
    static QList<T> fromJsonArray(const QJsonValue &json)
    {
        QList<T> list;
        if (!json.isArray()) {
            return list;
        }

        QJsonArray array = json.toArray();
        for (const QJsonValue &item : array) {
            list.append(fromJson<T>(item));
        }

        return list;
    }
};

#endif // JSONMAPPER_H