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/*
* Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.ServerManager;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
public class MegastekProtocolDecoder extends BaseProtocolDecoder {
public MegastekProtocolDecoder(ServerManager serverManager) {
super(serverManager);
}
static private Pattern patternGPRMC = Pattern.compile(
"\\$GPRMC," +
"(\\d{2})(\\d{2})(\\d{2})\\.\\d+," + // Time (HHMMSS.SSS)
"([AV])," + // Validity
"(\\d+)(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"([NS])," +
"(\\d+)(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([EW])," +
"(\\d+\\.\\d+)?," + // Speed
"(\\d+\\.\\d+)?," + // Course
"(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
"[^\\*]+\\*[0-9a-fA-F]{2}"); // Checksum
static private Pattern patternSimple = Pattern.compile(
"[FL]," + // Flag
"([^,]*)," + // Alarm
"imei:(\\d+)," + // IMEI
"(\\d+)?," + // Satellites
"(\\d+\\.\\d+)," + // Altitude
"Battery=(\\d+)%,," + // Battery
"(\\d)?," + // Charger
"(\\d+)," + // MCC
"(\\d+)," + // MNC
"(\\p{XDigit}{4},\\p{XDigit}{4});" + // Location code
".+"); // Checksum
static private Pattern patternAlternative = Pattern.compile(
"(\\d+)," + // MCC
"(\\d+)," + // MNC
"(\\p{XDigit}{4},\\p{XDigit}{4})," + // Location code
"(\\d+)," + // GSM signal
"(\\d+)," + // Battery
"(\\d+)," + // Flags
"(\\d+)," + // Inputs
"(?:(\\d+),)?" + // Outputs
"(\\d\\.?\\d*)," + // ADC 1
"(?:(\\d\\.\\d{2})," + // ADC 2
"(\\d\\.\\d{2}),)?" + // ADC 3
"([^;]+);" + // Alarm
".*"); // Checksum
private boolean parseGPRMC(String gprmc, Position position) {
// Parse message
Matcher parser = patternGPRMC.matcher(gprmc);
if (!parser.matches()) {
return false;
}
int index = 1;
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
String speed = parser.group(index++);
if (speed != null) {
position.setSpeed(Double.valueOf(speed));
} else {
position.setSpeed(0.0);
}
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
} else {
position.setCourse(0.0);
}
// Date
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
return true;
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Detect type
boolean simple = (sentence.charAt(3) == ',');
// Split message
String id;
String gprmc;
String status;
if (simple) {
int beginIndex = 4;
int endIndex = sentence.indexOf(',', beginIndex);
id = sentence.substring(beginIndex, endIndex);
beginIndex = endIndex + 1;
endIndex = sentence.indexOf('*', beginIndex) + 3;
gprmc = sentence.substring(beginIndex, endIndex);
beginIndex = endIndex + 1;
status = sentence.substring(beginIndex);
} else {
int beginIndex = 3;
int endIndex = beginIndex + 16;
id = sentence.substring(beginIndex, endIndex).trim();
beginIndex = endIndex + 2;
endIndex = sentence.indexOf('*', beginIndex) + 3;
gprmc = sentence.substring(beginIndex, endIndex);
beginIndex = endIndex + 1;
status = sentence.substring(beginIndex);
}
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("megastek");
// Parse location data
if (!parseGPRMC(gprmc, position)) {
return null;
}
if (simple) {
// Parse status
Matcher parser = patternSimple.matcher(status);
if (!parser.matches()) {
return null;
}
int index = 1;
// Alarm
extendedInfo.set("alarm", parser.group(index++));
// IMEI
String imei = parser.group(index++);
try {
position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
} catch(Exception firstError) {
try {
position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
} catch(Exception secondError) {
Log.warning("Unknown device - " + imei + " (id - " + id + ")");
return null;
}
}
// Satellites
String satellites = parser.group(index++);
if (satellites != null) {
extendedInfo.set("satellites", satellites);
}
// Altitude
position.setAltitude(Double.valueOf(parser.group(index++)));
// Battery
extendedInfo.set("power", Double.valueOf(parser.group(index++)));
// Charger
String charger = parser.group(index++);
if (charger != null) {
extendedInfo.set("charger", Integer.valueOf(charger) == 1);
}
extendedInfo.set("mcc", parser.group(index++));
extendedInfo.set("mnc", parser.group(index++));
extendedInfo.set("lac", parser.group(index++));
} else {
// Parse status
Matcher parser = patternAlternative.matcher(status);
if (!parser.matches()) {
return null;
}
int index = 1;
// Altitude
position.setAltitude(0.0);
try {
position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + id);
return null;
}
extendedInfo.set("mcc", parser.group(index++));
extendedInfo.set("mnc", parser.group(index++));
extendedInfo.set("lac", parser.group(index++));
extendedInfo.set("gsm", parser.group(index++));
// Battery
extendedInfo.set("battery", Double.valueOf(parser.group(index++)));
extendedInfo.set("flags", parser.group(index++));
extendedInfo.set("input", parser.group(index++));
extendedInfo.set("output", parser.group(index++));
extendedInfo.set("adc1", parser.group(index++));
extendedInfo.set("adc2", parser.group(index++));
extendedInfo.set("adc3", parser.group(index++));
extendedInfo.set("alarm", parser.group(index++));
}
position.setExtendedInfo(extendedInfo.toString());
return position;
}
}
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