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/*
* Copyright 2013 - 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.DeviceSession;
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 GotopProtocolDecoder extends BaseProtocolDecoder {
public GotopProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.number("(d+),") // imei
.expression("([^,]+),") // type
.expression("([AV]),") // validity
.number("DATE:(dd)(dd)(dd),") // date (yyddmm)
.number("TIME:(dd)(dd)(dd),") // time (hhmmss)
.number("LAT:(d+.d+)([NS]),") // latitude
.number("LO[NT]:(d+.d+)([EW]),") // longitude
.text("Speed:").number("(d+.d+),") // speed
.expression("([^,]+),") // status
.number("(d+)?") // course
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
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());
String type = parser.next();
if (type.equals("CMD-KEY")) {
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
} else if (type.startsWith("ALM-B")) {
if (Character.getNumericValue(type.charAt(5)) % 2 > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
} else {
position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
}
}
position.setValid(parser.next().equals("A"));
position.setTime(parser.nextDateTime());
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
position.set(Position.KEY_STATUS, parser.next());
position.setCourse(parser.nextDouble(0));
return position;
}
}
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