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/*
* Copyright 2014 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.LinkedList;
import java.util.List;
import java.util.TimeZone;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
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 OrionProtocolDecoder extends BaseProtocolDecoder {
public OrionProtocolDecoder(ServerManager serverManager) {
super(serverManager);
}
private static final int TYPE_USERLOG = 0;
private static final int TYPE_SYSLOG = 3;
private static void sendResponse(Channel channel, ChannelBuffer buf) {
if (channel != null) {
ChannelBuffer response = ChannelBuffers.directBuffer(4);
response.writeByte('*');
response.writeShort(buf.getUnsignedShort(buf.writerIndex() - 2));
response.writeByte(buf.getUnsignedByte(buf.writerIndex() - 3));
channel.write(response);
}
}
private static double convertCoordinate(int value) {
double degrees = value / 1000000;
double minutes = (Math.abs(value) % 1000000) / 10000.0;
return degrees + minutes / 60;
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
int type = buf.readUnsignedByte() & 0x0f;
if (type == TYPE_USERLOG) {
int header = buf.readUnsignedByte();
if ((header & 0x40) != 0) {
sendResponse(channel, buf);
}
String id = String.valueOf(buf.readUnsignedInt());
long deviceId;
try {
deviceId = getDataManager().getDeviceByImei(id).getId();
} catch(Exception error) {
Log.warning("Unknown device - " + id);
return null;
}
List<Position> positions = new LinkedList<Position>();
for (int i = 0; i < (header & 0x0f); i++) {
// Create new position
Position position = new Position();
position.setDeviceId(deviceId);
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("orion");
extendedInfo.set("event", buf.readUnsignedByte());
buf.readUnsignedByte(); // length
extendedInfo.set("flag1", buf.readUnsignedByte());
extendedInfo.set("flag2", buf.readUnsignedByte());
// Location
position.setLatitude(convertCoordinate(buf.readInt()));
position.setLongitude(convertCoordinate(buf.readInt()));
position.setAltitude(buf.readShort()/ 10.0);
position.setCourse((double) buf.readUnsignedShort());
position.setSpeed(buf.readUnsignedShort() * 0.0539957);
// Date and time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
time.set(Calendar.MONTH, buf.readUnsignedByte() - 1);
time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
time.set(Calendar.MINUTE, buf.readUnsignedByte());
time.set(Calendar.SECOND, buf.readUnsignedByte());
position.setTime(time.getTime());
// Accuracy
int satellites = buf.readUnsignedByte();
extendedInfo.set("satellites", satellites);
position.setValid(satellites >= 3);
position.setExtendedInfo(extendedInfo.toString());
positions.add(position);
}
return positions;
}
return null;
}
}
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