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p_0x8003.go
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74 lines (66 loc) · 2.13 KB
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package model
import (
"encoding/binary"
"fmt"
"github.com/cuteLittleDevil/go-jt808/protocol"
"github.com/cuteLittleDevil/go-jt808/protocol/jt808"
"github.com/cuteLittleDevil/go-jt808/shared/consts"
"strings"
)
type P0x8003 struct {
BaseHandle
// OriginalSerialNumber 原始消息流水号 对应要求补传的原始消息第一包的消息流水号
OriginalSerialNumber uint16 `json:"originalSerialNumber"`
// AgainPackageCount 重传包总数
AgainPackageCount byte `json:"againPackageCount"`
// AgainPackageList 重传包ID列表 BYTE[2*n] 重传包序号顺序排列，如“包 ID1 包 ID2......包 IDn
AgainPackageList []uint16 `json:"againPackageList"`
}
func (p *P0x8003) Protocol() consts.JT808CommandType {
return consts.P8003ReissueSubcontractingRequest
}
func (p *P0x8003) ReplyProtocol() consts.JT808CommandType {
return 0
}
func (p *P0x8003) Parse(jtMsg *jt808.JTMessage) error {
body := jtMsg.Body
if len(body) < 3 {
return protocol.ErrBodyLengthInconsistency
}
p.OriginalSerialNumber = binary.BigEndian.Uint16(body[:2])
p.AgainPackageCount = body[2]
if len(body) != 3+2*int(p.AgainPackageCount) {
return protocol.ErrBodyLengthInconsistency
}
for i := 0; i < int(p.AgainPackageCount); i++ {
id := binary.BigEndian.Uint16(body[3+(2*i) : 3+(2*i)+2])
p.AgainPackageList = append(p.AgainPackageList, id)
}
return nil
}
func (p *P0x8003) Encode() []byte {
data := make([]byte, 3)
binary.BigEndian.PutUint16(data[:2], p.OriginalSerialNumber)
data[2] = p.AgainPackageCount
for _, v := range p.AgainPackageList {
data = binary.BigEndian.AppendUint16(data, v)
}
return data
}
func (p *P0x8003) HasReply() bool {
return false
}
func (p *P0x8003) String() string {
str := "\t重传包ID列表:"
for _, v := range p.AgainPackageList {
str += fmt.Sprintf("\n\t[%04x] 重传包ID:[%v]", v, v)
}
return strings.Join([]string{
"数据体对象:{",
fmt.Sprintf("\t%s:[%x]", p.Protocol(), p.Encode()),
fmt.Sprintf("\t[%04x] 原始消息流水号:[%d]", p.OriginalSerialNumber, p.OriginalSerialNumber),
fmt.Sprintf("\t[%02x] 重传包总数:[%d]", p.AgainPackageCount, p.AgainPackageCount),
str,
"}",
}, "\n")
}