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/*
* Copyright 2019 - 2022 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.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;
import java.net.SocketAddress;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
public class S168ProtocolDecoder extends BaseProtocolDecoder {
public S168ProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
String[] values = sentence.split("#");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[1]);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
Network network = new Network();
String content = values[4];
String[] fragments = content.split(";");
for (String fragment : fragments) {
if (fragment.isEmpty()) {
continue;
}
int dataIndex = fragment.indexOf(':');
String type = fragment.substring(0, dataIndex);
values = fragment.substring(dataIndex + 1).split(",");
int index = 0;
switch (type) {
case "GDATA":
position.setValid(values[index++].equals("A"));
position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
DateFormat dateFormat = new SimpleDateFormat("yyMMddHHmmss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
position.setTime(dateFormat.parse(values[index++]));
position.setLatitude(Double.parseDouble(values[index++]));
position.setLongitude(Double.parseDouble(values[index++]));
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
position.setCourse(Integer.parseInt(values[index++]));
position.setAltitude(Integer.parseInt(values[index++]));
break;
case "CELL":
int cellCount = Integer.parseInt(values[index++]);
int mcc = Integer.parseInt(values[index++], 16);
int mnc = Integer.parseInt(values[index++], 16);
for (int i = 0; i < cellCount; i++) {
network.addCellTower(CellTower.from(
mcc, mnc, Integer.parseInt(values[index++], 16), Integer.parseInt(values[index++], 16),
Integer.parseInt(values[index++], 16)));
}
break;
case "WIFI":
int wifiCount = Integer.parseInt(values[index++]);
for (int i = 0; i < wifiCount; i++) {
network.addWifiAccessPoint(WifiAccessPoint.from(
values[index++].replace('-', ':'), Integer.parseInt(values[index++])));
}
break;
case "STATUS":
position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[index++]));
position.set(Position.KEY_RSSI, Integer.parseInt(values[index++]));
break;
default:
break;
}
}
if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
position.setNetwork(network);
}
if (!position.getAttributes().containsKey(Position.KEY_SATELLITES)) {
getLastLocation(position, null);
}
if (position.getNetwork() != null || !position.getAttributes().isEmpty()) {
return position;
} else {
return null;
}
}
}
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