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/*
* Copyright 2019 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;
import java.net.SocketAddress;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
public class MictrackProtocolDecoder extends BaseProtocolDecoder {
public MictrackProtocolDecoder(Protocol protocol) {
super(protocol);
}
private Date decodeTime(String data) throws ParseException {
DateFormat dateFormat = new SimpleDateFormat("yyMMddHHmmss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
return dateFormat.parse(data);
}
private String decodeAlarm(int event) {
switch (event) {
case 5:
return Position.ALARM_SOS;
case 8:
return Position.ALARM_LOW_BATTERY;
case 9:
return Position.ALARM_GEOFENCE_ENTER;
case 10:
return Position.ALARM_GEOFENCE_EXIT;
case 12:
return Position.ALARM_POWER_OFF;
default:
return null;
}
}
private void decodeLocation(Position position, String data) throws ParseException {
int index = 0;
String[] values = data.split("\\+");
position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
position.setValid(true);
position.setTime(decodeTime(values[index++]));
position.setLatitude(Double.parseDouble(values[index++]));
position.setLongitude(Double.parseDouble(values[index++]));
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
position.setCourse(Integer.parseInt(values[index++]));
int event = Integer.parseInt(values[index++]);
position.set(Position.KEY_ALARM, decodeAlarm(event));
position.set(Position.KEY_EVENT, event);
position.set(Position.KEY_BATTERY, Integer.parseInt(values[index++]) * 0.001);
}
private void decodeCell(Network network, String data) {
String[] values = data.split(",");
int length = values.length % 5 == 0 ? 5 : 4;
for (int i = 0; i < values.length / length; i++) {
int mnc = Integer.parseInt(values[i * length]);
int cid = Integer.parseInt(values[i * length + 1]);
int lac = Integer.parseInt(values[i * length + 2]);
int mcc = Integer.parseInt(values[i * length + 3]);
network.addCellTower(CellTower.from(mcc, mnc, lac, cid));
}
}
private void decodeWifi(Network network, String data) {
String[] values = data.split(",");
for (int i = 0; i < values.length / 2; i++) {
network.addWifiAccessPoint(WifiAccessPoint.from(values[i * 2], Integer.parseInt(values[i * 2 + 1])));
}
}
private void decodeNetwork(Position position, String data, boolean hasWifi, boolean hasCell) throws ParseException {
int index = 0;
String[] values = data.split("\\+");
getLastLocation(position, decodeTime(values[index++]));
Network network = new Network();
if (hasWifi) {
decodeWifi(network, values[index++]);
}
if (hasCell) {
decodeCell(network, values[index++]);
}
position.setNetwork(network);
int event = Integer.parseInt(values[index++]);
position.set(Position.KEY_ALARM, decodeAlarm(event));
position.set(Position.KEY_EVENT, event);
position.set(Position.KEY_BATTERY, Integer.parseInt(values[index++]) * 0.001);
}
private void decodeStatus(Position position, String data) throws ParseException {
int index = 0;
String[] values = data.split("\\+");
position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
getLastLocation(position, decodeTime(values[index++]));
index += 4; // fix values
int event = Integer.parseInt(values[index++]);
position.set(Position.KEY_ALARM, decodeAlarm(event));
position.set(Position.KEY_EVENT, event);
position.set(Position.KEY_BATTERY, Integer.parseInt(values[index++]) * 0.001);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String[] fragments = ((String) msg).split(";");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, fragments[2]);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
switch (fragments[3]) {
case "R0":
decodeLocation(position, fragments[4]);
break;
case "R1":
decodeNetwork(position, fragments[4], true, false);
break;
case "R2":
case "R3":
decodeNetwork(position, fragments[4], false, true);
break;
case "R12":
case "R13":
decodeNetwork(position, fragments[4], true, true);
break;
case "RH":
decodeStatus(position, fragments[4]);
break;
default:
return null;
}
return position;
}
}
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