/*
* Copyright 2013 - 2014 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.Context;
import org.traccar.DeviceSession;
import org.traccar.helper.DateBuilder;
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 GlobalSatProtocolDecoder extends BaseProtocolDecoder {
private String format0;
private String format1;
public GlobalSatProtocolDecoder(GlobalSatProtocol protocol) {
super(protocol);
format0 = Context.getConfig().getString(getProtocolName() + ".format0", "TSPRXAB27GHKLMnaicz*U!");
format1 = Context.getConfig().getString(getProtocolName() + ".format1", "SARY*U!");
}
public void setFormat0(String format) {
format0 = format;
}
public void setFormat1(String format) {
format1 = format;
}
private Position decodeOriginal(Channel channel, SocketAddress remoteAddress, String sentence) {
if (channel != null) {
channel.write("ACK\r");
}
String format;
if (sentence.startsWith("GSr")) {
format = format0;
} else if (sentence.startsWith("GSh")) {
format = format1;
} else {
return null;
}
// Check that message contains required parameters
if (!format.contains("B") || !format.contains("S") || !(format.contains("1")
|| format.contains("2") || format.contains("3")) || !(format.contains("6")
|| format.contains("7") || format.contains("8"))) {
return null;
}
if (format.contains("*")) {
format = format.substring(0, format.indexOf('*'));
sentence = sentence.substring(0, sentence.indexOf('*'));
}
String[] values = sentence.split(",");
Position position = new Position();
position.setProtocol(getProtocolName());
for (int formatIndex = 0, valueIndex = 1; formatIndex < format.length()
&& valueIndex < values.length; formatIndex++) {
String value = values[valueIndex];
switch (format.charAt(formatIndex)) {
case 'S':
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
break;
case 'A':
if (value.isEmpty()) {
position.setValid(false);
} else {
position.setValid(Integer.parseInt(value) != 1);
}
break;
case 'B':
DateBuilder dateBuilder = new DateBuilder()
.setDay(Integer.parseInt(value.substring(0, 2)))
.setMonth(Integer.parseInt(value.substring(2, 4)))
.setYear(Integer.parseInt(value.substring(4)));
value = values[++valueIndex];
dateBuilder
.setHour(Integer.parseInt(value.substring(0, 2)))
.setMinute(Integer.parseInt(value.substring(2, 4)))
.setSecond(Integer.parseInt(value.substring(4)));
position.setTime(dateBuilder.getDate());
break;
case 'C':
valueIndex += 1;
break;
case '1':
double longitude = Double.parseDouble(value.substring(1));
if (value.charAt(0) == 'W') {
longitude = -longitude;
}
position.setLongitude(longitude);
break;
case '2':
longitude = Double.parseDouble(value.substring(4)) / 60;
longitude += Integer.parseInt(value.substring(1, 4));
if (value.charAt(0) == 'W') {
longitude = -longitude;
}
position.setLongitude(longitude);
break;
case '3':
position.setLongitude(Double.parseDouble(value) * 0.000001);
break;
case '6':
double latitude = Double.parseDouble(value.substring(1));
if (value.charAt(0) == 'S') {
latitude = -latitude;
}
position.setLatitude(latitude);
break;
case '7':
latitude = Double.parseDouble(value.substring(3)) / 60;
latitude += Integer.parseInt(value.substring(1, 3));
if (value.charAt(0) == 'S') {
latitude = -latitude;
}
position.setLatitude(latitude);
break;
case '8':
position.setLatitude(Double.parseDouble(value) * 0.000001);
break;
case 'G':
position.setAltitude(Double.parseDouble(value));
break;
case 'H':
position.setSpeed(Double.parseDouble(value));
break;
case 'I':
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
break;
case 'J':
position.setSpeed(UnitsConverter.knotsFromMph(Double.parseDouble(value)));
break;
case 'K':
position.setCourse(Double.parseDouble(value));
break;
case 'N':
if (value.endsWith("mV")) {
position.set(Position.KEY_BATTERY,
Integer.parseInt(value.substring(0, value.length() - 2)) / 1000.0);
} else {
position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value));
}
break;
default:
// Unsupported
break;
}
valueIndex += 1;
}
return position;
}
private static final Pattern PATTERN = new PatternBuilder()
.text("$")
.number("(d+),") // imei
.number("d+,") // mode
.number("(d+),") // fix
.number("(dd)(dd)(dd),") // date (ddmmyy)
.number("(dd)(dd)(dd),") // time (hhmmss)
.expression("([EW])")
.number("(ddd)(dd.d+),") // longitude (dddmm.mmmm)
.expression("([NS])")
.number("(dd)(dd.d+),") // latitude (ddmm.mmmm)
.number("(d+.?d*),") // altitude
.number("(d+.?d*),") // speed
.number("(d+.?d*)?,") // course
.number("(d+)[,*]") // satellites
.number("(d+.?d*)") // hdop
.compile();
private Position decodeAlternative(Channel channel, SocketAddress remoteAddress, String sentence) {
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(!parser.next().equals("1"));
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
position.setAltitude(parser.nextDouble(0));
position.setSpeed(parser.nextDouble(0));
position.setCourse(parser.nextDouble(0));
position.set(Position.KEY_SATELLITES, parser.nextInt(0));
position.set(Position.KEY_HDOP, parser.next());
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("GS")) {
return decodeOriginal(channel, remoteAddress, sentence);
} else if (sentence.startsWith("$")) {
return decodeAlternative(channel, remoteAddress, sentence);
}
return null;
}
}