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/*
* Copyright 2013 - 2017 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.model.Position;
import java.text.ParseException;
import java.net.SocketAddress;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import org.traccar.helper.UnitsConverter;
public class SviasProtocolDecoder extends BaseProtocolDecoder {
public static final String MSG_KEEPALIVE = "@";
public SviasProtocolDecoder(SviasProtocol protocol) {
super(protocol);
}
private double convertCoordinates(long v) {
return Double.valueOf(((float) ((((float) v / 1.0E7F)
- ((int) (v / 10000000L))) * 1.6666666666666667D)) + ((int) (v / 10000000L)));
}
private String toBin(String v) {
return Integer.toString(Integer.parseInt(v), 2);
}
private Position decodePosition(Channel channel, SocketAddress remoteAddress, String substring)
throws ParseException {
String[] values = substring.split(",");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[3]);
if (deviceSession == null) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, Integer.valueOf(values[2]));
position.set(Position.KEY_TYPE, values[4]);
DateFormat dateFormat = new SimpleDateFormat("ddMMyyHHmmss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
String date = String.format("%06d", Integer.parseInt(values[5]));
String time = String.format("%06d", Integer.parseInt(values[6]));
position.setTime(dateFormat.parse(date + time));
position.setLatitude(convertCoordinates(Long.valueOf(values[7])));
position.setLongitude(convertCoordinates(Long.valueOf(values[8])));
position.setSpeed(UnitsConverter.knotsFromKph(Integer.valueOf(values[9]) / 100));
position.setCourse(Integer.valueOf(values[10]) / 100);
position.set(Position.KEY_ODOMETER, Integer.valueOf(values[11]));
String input = new StringBuilder(String.format("%08d",
Integer.parseInt(toBin(values[12])))).reverse().toString();
String output = new StringBuilder(String.format("%08d",
Integer.parseInt(toBin(values[13])))).reverse().toString();
position.set(Position.KEY_ALARM, (input.substring(0, 1).equals("1") ? Position.ALARM_SOS : null));
position.set(Position.KEY_IGNITION, input.substring(4, 5).equals("1"));
position.setValid(output.substring(0, 1).equals("1"));
return position;
}
@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
String sentence = (String) msg;
if (!sentence.contains(":")) {
Position position = decodePosition(channel, remoteAddress, sentence.substring(1));
if (position != null) {
return position;
}
}
if (channel != null) {
channel.write(MSG_KEEPALIVE);
}
return null;
}
}
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