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/*
* Copyright 2012 - 2018 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.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class Gl100ProtocolDecoder extends BaseProtocolDecoder {
public Gl100ProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("+RESP:")
.expression("GT...,")
.number("(d{15}),") // imei
.groupBegin()
.number("d+,") // number
.number("d,") // reserved / geofence id
.number("d+") // reserved / geofence alert // battery
.or()
.number("[^,]*") // calling number
.groupEnd(",")
.expression("([01]),") // gps fix
.number("(d+.d),") // speed
.number("(d+),") // course
.number("(-?d+.d),") // altitude
.number("d*,") // gps accuracy
.number("(-?d+.d+),") // longitude
.number("(-?d+.d+),") // latitude
.number("(dddd)(dd)(dd)") // date (yyyymmdd)
.number("(dd)(dd)(dd),") // time (hhmmss)
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.contains("AT+GTHBD=") && channel != null) {
String response = "+RESP:GTHBD,GPRS ACTIVE,";
response += sentence.substring(9, sentence.lastIndexOf(','));
response += '\0';
channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); // heartbeat response
}
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(parser.nextInt(0) == 0);
position.setSpeed(parser.nextDouble(0));
position.setCourse(parser.nextDouble(0));
position.setAltitude(parser.nextDouble(0));
position.setLongitude(parser.nextDouble(0));
position.setLatitude(parser.nextDouble(0));
position.setTime(parser.nextDateTime());
return position;
}
}
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