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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef CONNECTION_H
#define CONNECTION_H
#include <QCborStreamReader>
#include <QCborStreamWriter>
#include <QElapsedTimer>
#include <QHostAddress>
#include <QString>
#include <QTcpSocket>
#include <QTimer>
class Connection : public QTcpSocket
{
Q_OBJECT
public:
enum ConnectionState {
WaitingForGreeting,
ReadingGreeting,
ProcessingGreeting,
ReadyForUse
};
enum DataType {
PlainText,
Ping,
Pong,
Greeting,
Undefined
};
explicit Connection(QObject *parent = nullptr);
explicit Connection(qintptr socketDescriptor, QObject *parent = nullptr);
~Connection();
QString name() const;
void setGreetingMessage(const QString &message, const QByteArray &uniqueId);
bool sendMessage(const QString &message);
QByteArray uniqueId() const;
signals:
void readyForUse();
void newMessage(const QString &from, const QString &message);
protected:
void timerEvent(QTimerEvent *timerEvent) override;
private slots:
void processReadyRead();
void sendPing();
void sendGreetingMessage();
private:
bool hasEnoughData();
void processGreeting();
void processData();
QCborStreamReader reader;
QCborStreamWriter writer;
QString greetingMessage = tr("undefined");
QString username = tr("unknown");
QTimer pingTimer;
QElapsedTimer pongTime;
QString buffer;
QByteArray localUniqueId;
QByteArray peerUniqueId;
ConnectionState state = WaitingForGreeting;
DataType currentDataType = Undefined;
int transferTimerId = -1;
bool isGreetingMessageSent = false;
};
#endif
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