package safeluck.drive.evaluation.platformMessage;
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import android.util.Log;
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import com.anyun.exam.lib.MyLog;
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import com.anyun.im_lib.util.ByteUtil;
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import safeluck.drive.evaluation.util.Utils;
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/**
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* MyApplication2
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* Created by lzw on 2019/12/17. 15:39:23
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* 邮箱：632393724@qq.com
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* All Rights Saved! Chongqing AnYun Tech co. LTD
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*/
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public abstract class DriveExamProtocol {
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private static final String TAG = "DriveExamProtocol";
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/***========================
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消息结构表
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标识位 消息头 消息体 校验码 标识位
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0x7E 0x7E
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======================**/
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// 标识位(字节流开始）
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private byte MESSAGE_HEAD = 0x7e;
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//标识位（字节流结束）
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private byte MESSAGE_TAIL = 0x7e;
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//校验码指从消息头开始，同后一字节异或，直到校验码前一个字节，占用一个字节
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//校验码 先暂时写死 todo
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private byte checkCode = 0x78;
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/***===========以下是消息头=============***/
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//协议版本号 BYTE 235，固定
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private short protocol_version = 235;
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//消息ID
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private short msg_id;
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/** 消息体属性格式结构表
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15 14 13 | 12 11 10 | 9 8 7 6 5 4 3 2 1 0
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保留 数据加密方式 消息体长度
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**/
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//消息体属性
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private short msg_property =2;
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/**
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* 终端手机号 字符串长度必须为16
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**/
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private String phoneOnTerminal = "0008618513021245";
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/**
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*
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* 13 消息流水号 WORD 按发送顺序从0开始循环累加
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*
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*/
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public static short msg_serial_num=0;
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//15 预留 BYTE 预留
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private byte reserve = 0x00;
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/***===========消息头结束=============***/
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/**
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* 消息体 需要子类实现
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*/
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protected abstract byte[] createMessageBody();
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/**
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* 构造函数
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* @param msg_id 消息ID
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*/
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public DriveExamProtocol(short msg_id) {
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this.msg_id = msg_id;
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}
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/**
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* 消息转为byte数组 7E......7E
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* @return
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*/
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public byte[] toBytes(){
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byte[] desBytes = new byte[1+16+msgBodyLength()+1+1];
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int pos = 0;
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//标识位
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desBytes[pos] = MESSAGE_HEAD;
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pos++;
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//协议版本号
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byte[] protoVersion = ByteUtil.shortGetByte(protocol_version);
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System.arraycopy(protoVersion,0,desBytes,pos,protoVersion.length);
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pos +=protoVersion.length;
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//消息ID
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byte[] msgIdBytes = ByteUtil.shortGetBytes(msg_id);
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System.arraycopy(msgIdBytes,0,desBytes,pos,msgIdBytes.length);
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pos+=msgIdBytes.length;
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//消息体属性 默认为消息体长度
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msg_property = msgBodyLength();
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byte[] msg_pro_bytes = ByteUtil.shortGetBytes(msg_property);
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System.arraycopy(msg_pro_bytes,0,desBytes,pos,msg_pro_bytes.length);
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pos+=msg_pro_bytes.length;
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//终端手机号
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byte[] phoneBytes = ByteUtil.str2Bcd(phoneOnTerminal);
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System.arraycopy(phoneBytes,0,desBytes,pos,phoneBytes.length);
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pos+=phoneBytes.length;
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//消息流水号
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byte[] msg_serialNum = ByteUtil.shortGetBytes(msg_serial_num++);
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System.arraycopy(msg_serialNum,0,desBytes,pos,msg_serialNum.length);
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pos+=msg_serialNum.length;
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//保留byte
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desBytes[pos] = reserve;
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pos++;
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//消息体
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byte[] messageBodyBytes = createMessageBody();
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System.arraycopy(messageBodyBytes,0,desBytes,pos,messageBodyBytes.length);
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pos+=messageBodyBytes.length;
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//校验码
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checkCode = Utils.calCheckCode(ByteUtil.subArray(desBytes,1,pos-1));
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desBytes[pos] = checkCode;
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pos++;
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//末尾结束标识位
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desBytes[pos] = MESSAGE_TAIL;
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MyLog.i(TAG, "原始包长度="+(pos+1));
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MyLog.i(TAG, "原始包内容: "+ByteUtil.byte2HexStr(desBytes));
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byte[] tranferbytes = Utils.transferMeaning(desBytes);
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MyLog.i(TAG,"转义后的包内容："+ByteUtil.byte2HexStr(tranferbytes));
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return tranferbytes;
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}
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protected abstract short msgBodyLength();
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}
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