maeqtt/mqtt/packets/ack.go

package packets

import (
	"bytes"
	"io"

	"badat.dev/maeqtt/v2/mqtt/properties"
	"badat.dev/maeqtt/v2/mqtt/types"
)

// Boilerplate struct for de/serializing various ack packets
type pubRespPacket struct {
	PacketType PacketType
	PacketID   uint16
	Properties []properties.Property
	Reason     byte
}

func (p pubRespPacket) Write(w io.Writer) error {
	buf := bytes.NewBuffer([]byte{})
	err := types.WriteUint16(buf, p.PacketID)
	if err != nil {
		return err
	}

	err = buf.WriteByte(byte(p.Reason))
	if err != nil {
		return err
	}

	err = properties.WriteProps(buf, p.Properties)
	if err != nil {
		return err
	}

	conPack := controlPacket{
		packetType: p.PacketType,
		flags:      0,
		reader:     buf,
	}
	return conPack.write(w)
}