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/*
* Copyright 2012 - 2016 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 org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.DateBuilder;
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 XexunProtocolDecoder extends BaseProtocolDecoder {
private final boolean full;
public XexunProtocolDecoder(XexunProtocol protocol, boolean full) {
super(protocol);
this.full = full;
}
private static final Pattern PATTERN_BASIC = new PatternBuilder()
.expression("G[PN]RMC,")
.number("(?:(dd)(dd)(dd))?.(d+),") // time
.expression("([AV]),") // validity
.number("(d*?)(d?d.d+),([NS]),") // latitude
.number("(d*?)(d?d.d+),([EW])?,") // longitude
.number("(d+.?d*),") // speed
.number("(d+.?d*)?,") // course
.number("(?:(dd)(dd)(dd))?,") // date
.expression("[^*]*").text("*")
.number("xx") // checksum
.expression("\\r\\n").optional()
.expression(",([FL]),") // signal
.expression("([^,]*),").optional() // alarm
.any()
.number("imei:(d+),") // imei
.compile();
private static final Pattern PATTERN_FULL = new PatternBuilder()
.any()
.number("(d+),") // serial
.expression("([^,]+)?,") // phone number
.expression(PATTERN_BASIC.pattern())
.number("(d+),") // satellites
.number("(-?d+.d+)?,") // altitude
.number("[FL]:(d+.d+)V") // power
.any()
.compile();
private String decodeAlarm(String value) {
if (value != null) {
switch (value) {
case "help me!":
return Position.ALARM_SOS;
case "low battery":
return Position.ALARM_LOW_BATTERY;
case "move!":
case "moved!":
return Position.ALARM_MOVEMENT;
default:
break;
}
}
return null;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
Pattern pattern = PATTERN_BASIC;
if (full) {
pattern = PATTERN_FULL;
}
Parser parser = new Parser(pattern, (String) msg);
if (!parser.matches()) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
if (full) {
position.set("serial", parser.next());
position.set("number", parser.next());
}
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble());
position.setCourse(parser.nextDouble());
dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
position.set("signal", parser.next());
position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
if (full) {
position.set(Position.KEY_SATELLITES, parser.next().replaceFirst("^0*(?![\\.$])", ""));
position.setAltitude(parser.nextDouble());
position.set(Position.KEY_POWER, parser.nextDouble());
}
return position;
}
}
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