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/*
* Copyright 2016 - 2018 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.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class CguardProtocolDecoder extends BaseProtocolDecoder {
public CguardProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_NV = new PatternBuilder()
.text("NV:")
.number("(dd)(dd)(dd) ") // date (yymmdd)
.number("(dd)(dd)(dd)") // time (hhmmss)
.number(":(-?d+.d+)") // longitude
.number(":(-?d+.d+)") // latitude
.number(":(d+.?d*)") // speed
.number(":(?:NAN|(d+.?d*))") // accuracy
.number(":(?:NAN|(d+.?d*))") // course
.number(":(?:NAN|(d+.?d*))").optional() // altitude
.compile();
private static final Pattern PATTERN_BC = new PatternBuilder()
.text("BC:")
.number("(dd)(dd)(dd) ") // date (yymmdd)
.number("(dd)(dd)(dd):") // time (hhmmss)
.expression("(.+)") // data
.compile();
private Position decodePosition(DeviceSession deviceSession, String sentence) {
Parser parser = new Parser(PATTERN_NV, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(parser.nextDateTime());
position.setValid(true);
position.setLatitude(parser.nextDouble(0));
position.setLongitude(parser.nextDouble(0));
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
position.setAccuracy(parser.nextDouble(0));
position.setCourse(parser.nextDouble(0));
position.setAltitude(parser.nextDouble(0));
return position;
}
private Position decodeStatus(DeviceSession deviceSession, String sentence) {
Parser parser = new Parser(PATTERN_BC, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, parser.nextDateTime());
String[] data = parser.next().split(":");
for (int i = 0; i < data.length / 2; i++) {
String key = data[i * 2];
String value = data[i * 2 + 1];
switch (key) {
case "CSQ1":
position.set(Position.KEY_RSSI, Integer.parseInt(value));
break;
case "NSQ1":
position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
break;
case "BAT1":
if (value.contains(".")) {
position.set(Position.KEY_BATTERY, Double.parseDouble(value));
} else {
position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value));
}
break;
case "PWR1":
position.set(Position.KEY_POWER, Double.parseDouble(value));
break;
default:
position.set(key.toLowerCase(), value);
break;
}
}
return position;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("ID:") || sentence.startsWith("IDRO:")) {
getDeviceSession(channel, remoteAddress, sentence.substring(sentence.indexOf(':') + 1));
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
if (sentence.startsWith("NV:")) {
return decodePosition(deviceSession, sentence);
} else if (sentence.startsWith("BC:")) {
return decodeStatus(deviceSession, sentence);
}
return null;
}
}
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