network.h

См. документацию.

#ifndef NETWORK_H
#define NETWORK_H
 
#include <QObject>
#include <QTcpSocket>
#include <QJsonDocument>
#include <QJsonValue>
#include <QJsonArray>
#include <QJsonObject>
 
class Network;
 
 
class NetworkDestroyer
{
    private:
        Network* pInstance;
    public:
        ~NetworkDestroyer() {
            delete this->pInstance;
        }
        void initialize(Network * p) {
            this->pInstance = p;
        }
};

class Network: public QObject {
    private:
        static Network* pInstance;
        void initTCP();
        static QTcpSocket* tcpInstance;
        static NetworkDestroyer destroyer;
    protected:
        Network();
        Network(const Network&) = delete;
        Network& operator = (Network &) = delete;
        ~Network();
        friend class NetworkDestroyer;
    public:
        static Network* getInstance() {
            if (!pInstance) {
                pInstance = new Network();
                destroyer.initialize(pInstance);
            }
            return pInstance;
        }

        QJsonObject doRequest(QVariantMap request);
 
};
 
#endif // NETWORK_H