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/*
* Copyright 2018 - 2022 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.session.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class C2stekProtocolDecoder extends BaseProtocolDecoder {
public C2stekProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("PA$")
.number("(d+)") // imei
.text("$")
.expression(".#") // data type
.number("(dd)(dd)(dd)#") // date (yymmdd)
.number("(dd)(dd)(dd)#") // time (hhmmss)
.number("([01])#") // valid
.number("([+-]?d+.d+)#") // latitude
.number("([+-]?d+.d+)#") // longitude
.number("(d+.d+)#") // speed
.number("(d+.d+)#") // course
.number("(-?d+.d+)#") // altitude
.number("(d+)#") // battery
.number("d+#") // geo area alarm
.number("(x+)") // alarm
.groupBegin()
.number("#([01])?") // armed
.number("([01])") // door
.number("([01])#") // ignition
.groupEnd("?")
.any()
.text("$AP")
.compile();
private String decodeAlarm(int alarm) {
return switch (alarm) {
case 0x2 -> Position.ALARM_VIBRATION;
case 0x3 -> Position.ALARM_POWER_CUT;
case 0x4 -> Position.ALARM_OVERSPEED;
case 0x5 -> Position.ALARM_SOS;
case 0x6 -> Position.ALARM_DOOR;
case 0xA -> Position.ALARM_LOW_BATTERY;
case 0xB -> Position.ALARM_FAULT;
default -> null;
};
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.contains("$20$") && channel != null) {
channel.writeAndFlush(new NetworkMessage(sentence, remoteAddress));
}
Parser parser = new Parser(PATTERN, (String) msg);
if (!parser.matches()) {
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(parser.nextDateTime());
position.setValid(parser.nextInt() > 0);
position.setLatitude(parser.nextDouble());
position.setLongitude(parser.nextDouble());
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
position.setCourse(parser.nextDouble());
position.setAltitude(parser.nextDouble());
position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
position.set(Position.KEY_ALARM, decodeAlarm(parser.nextHexInt()));
if (parser.hasNext()) {
position.set(Position.KEY_ARMED, parser.nextInt() > 0);
}
if (parser.hasNext(2)) {
position.set(Position.KEY_DOOR, parser.nextInt() > 0);
position.set(Position.KEY_IGNITION, parser.nextInt() > 0);
}
return position;
}
}
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