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/*
* Copyright 2013 - 2021 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.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class WialonProtocolDecoder extends BaseProtocolDecoder {
public WialonProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_ANY = new PatternBuilder()
.expression("([^#]*)?") // imei
.text("#") // start byte
.expression("([^#]+)") // type
.text("#") // separator
.expression("(.*)") // message
.compile();
private static final Pattern PATTERN = new PatternBuilder()
.number("(dd)(dd)(dd);") // date (ddmmyy)
.number("(dd)(dd)(dd);") // time (hhmmss)
.number("(?:NA|(dd)(dd.d+));") // latitude
.expression("(?:NA|([NS]));")
.number("(?:NA|(ddd)(dd.d+));") // longitude
.expression("(?:NA|([EW]));")
.number("(d+.?d*)?;") // speed
.number("(?:NA|(d+.?d*))?;") // course
.number("(?:NA|(-?d+.?d*));") // altitude
.number("(?:NA|(d+))") // satellites
.groupBegin().text(";")
.number("(?:NA|(d+.?d*));") // hdop
.number("(?:NA|(d+));") // inputs
.number("(?:NA|(d+));") // outputs
.expression("(?:NA|([^;]*));") // adc
.expression("(?:NA|([^;]*));") // ibutton
.expression("(?:NA|(.*))") // params
.groupEnd("?")
.compile();
private void sendResponse(Channel channel, SocketAddress remoteAddress, String type, Integer number) {
if (channel != null) {
StringBuilder response = new StringBuilder("#A");
response.append(type);
response.append("#");
if (number != null) {
response.append(number);
}
response.append("\r\n");
channel.writeAndFlush(new NetworkMessage(response.toString(), remoteAddress));
}
}
private Position decodePosition(Channel channel, SocketAddress remoteAddress, String id, String substring) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
Parser parser = new Parser(PATTERN, substring);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
if (parser.hasNext(9)) {
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
position.setCourse(parser.nextDouble(0));
position.setAltitude(parser.nextDouble(0));
} else {
getLastLocation(position, position.getDeviceTime());
}
if (parser.hasNext()) {
int satellites = parser.nextInt(0);
position.setValid(satellites >= 3);
position.set(Position.KEY_SATELLITES, satellites);
}
position.set(Position.KEY_HDOP, parser.nextDouble());
position.set(Position.KEY_INPUT, parser.next());
position.set(Position.KEY_OUTPUT, parser.next());
if (parser.hasNext()) {
String[] values = parser.next().split(",");
for (int i = 0; i < values.length; i++) {
position.set(Position.PREFIX_ADC + (i + 1), values[i]);
}
}
position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
if (parser.hasNext()) {
String[] values = parser.next().split(",");
for (String param : values) {
Matcher paramParser = Pattern.compile("(.*):[1-3]:(.*)").matcher(param);
if (paramParser.matches()) {
try {
position.set(paramParser.group(1).toLowerCase(), Double.parseDouble(paramParser.group(2)));
} catch (NumberFormatException e) {
position.set(paramParser.group(1).toLowerCase(), paramParser.group(2));
}
}
}
}
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
Parser parser = new Parser(PATTERN_ANY, sentence);
if (!parser.matches()) {
return null;
}
String id = parser.next();
String type = parser.next();
String data = parser.next();
switch (type) {
case "L":
String[] values = data.split(";");
String imei = values[0].indexOf('.') >= 0 ? values[1] : values[0];
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession != null) {
sendResponse(channel, remoteAddress, type, 1);
}
break;
case "P":
sendResponse(channel, remoteAddress, type, null); // heartbeat
break;
case "D":
case "SD":
Position position = decodePosition(channel, remoteAddress, id, data);
if (position != null) {
sendResponse(channel, remoteAddress, "D", 1);
return position;
}
break;
case "B":
String[] messages = data.split("\\|");
List<Position> positions = new LinkedList<>();
for (String message : messages) {
position = decodePosition(channel, remoteAddress, id, message);
if (position != null) {
position.set(Position.KEY_ARCHIVE, true);
positions.add(position);
}
}
sendResponse(channel, remoteAddress, type, messages.length);
if (!positions.isEmpty()) {
return positions;
}
break;
case "M":
deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession != null) {
position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, new Date());
position.setValid(false);
position.set(Position.KEY_RESULT, data);
sendResponse(channel, remoteAddress, type, 1);
return position;
}
break;
default:
break;
}
return null;
}
}
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