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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#ifndef QMQTTCONTROLPACKET_P_H
#define QMQTTCONTROLPACKET_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qmqttglobal_p.h"

#include <QtCore/QByteArray>
#include <QtCore/QtGlobal>
#include <QtCore/private/qglobal_p.h>

QT_BEGIN_NAMESPACE

class Q_AUTOTEST_EXPORT QMqttControlPacket
{
public:
    enum PacketType {
        UNKNOWN     = 0x00,
        CONNECT     = 0x10,
        CONNACK     = 0x20,
        PUBLISH     = 0x30,
        PUBACK      = 0x40,
        PUBREC      = 0x50,
        PUBREL      = 0x60,
        PUBCOMP     = 0x70,
        SUBSCRIBE   = 0x80,
        SUBACK      = 0x90,
        UNSUBSCRIBE = 0xA0,
        UNSUBACK    = 0xB0,
        PINGREQ     = 0xC0,
        PINGRESP    = 0xD0,
        DISCONNECT  = 0xE0,
        AUTH        = 0xF0,
    };

    QMqttControlPacket();
    QMqttControlPacket(quint8 header);
    QMqttControlPacket(quint8 header, const QByteArray &pay);

    void clear();

    void setHeader(quint8 h);
    inline quint8 header() const { return m_header; }

    void append(char value);
    void append(quint16 value);
    void append(quint32 value);
    void append(const QByteArray &data);
    void appendRaw(const QByteArray &data);
    void appendRawVariableInteger(quint32 value);

    QByteArray serialize() const;
    QByteArray serializePayload() const;
    inline QByteArray payload() const { return m_payload; }
private:
    quint8 m_header{UNKNOWN};
    QByteArray m_payload;
};

QT_END_NAMESPACE

#endif // QMQTTCONTROLPACKET_P_H