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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.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class TechTltProtocolDecoder extends BaseProtocolDecoder {
public TechTltProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_STATUS = new PatternBuilder()
.number("(d+),") // id
.text("INFOGPRS,")
.number("V Bat=(d+.d),") // battery
.number("TEMP=(d+),") // temperature
.expression("[^,]*,")
.number("(d+)") // rssi
.compile();
private static final Pattern PATTERN_POSITION = new PatternBuilder()
.number("(d+)") // id
.text("*POS=Y,")
.number("(dd):(dd):(dd),") // time
.number("(dd)/(dd)/(dd),") // date
.number("(dd)(dd.d+)") // latitude
.expression("([NS]),")
.number("(ddd)(dd.d+)") // longitude
.expression("([EW]),")
.number("(d+.d+),") // speed
.number("(d+.d+),") // course
.number("(d+.d+),") // altitude
.number("(d+),") // satellites
.number("(d+),") // lac
.number("(d+)") // cid
.compile();
private Position decodeStatus(Channel channel, SocketAddress remoteAddress, String sentence) {
Parser parser = new Parser(PATTERN_STATUS, sentence);
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());
getLastLocation(position, null);
position.set(Position.KEY_BATTERY, parser.nextDouble());
position.set(Position.KEY_DEVICE_TEMP, parser.nextInt());
position.set(Position.KEY_RSSI, parser.nextInt());
return position;
}
private Position decodeLocation(Channel channel, SocketAddress remoteAddress, String sentence) {
Parser parser = new Parser(PATTERN_POSITION, sentence);
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.setValid(true);
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
position.setCourse(parser.nextDouble());
position.setAltitude(parser.nextDouble());
position.set(Position.KEY_SATELLITES, parser.nextInt());
position.setNetwork(new Network(CellTower.fromLacCid(parser.nextInt(), parser.nextInt())));
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.contains("INFO")) {
return decodeStatus(channel, remoteAddress, sentence);
} else if (sentence.contains("POS")) {
return decodeLocation(channel, remoteAddress, sentence);
} else {
return null;
}
}
}
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