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/*
* Copyright 2021 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.model.Position;
import javax.json.Json;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.util.Date;
public class FlexApiProtocolDecoder extends BaseProtocolDecoder {
public FlexApiProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String message = (String) msg;
JsonObject root = Json.createReader(new StringReader(message.substring(1, message.length() - 2))).readObject();
String topic = root.getString("topic");
String clientId = topic.substring(3, topic.indexOf('/', 3));
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, clientId);
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
JsonObject payload = root.getJsonObject("payload");
if (topic.contains("gnss")) {
position.setValid(true);
if (payload.containsKey("time")) {
position.setTime(new Date(payload.getInt("time") * 1000L));
position.setLatitude(payload.getJsonNumber("lat").doubleValue());
position.setLongitude(payload.getJsonNumber("log").doubleValue());
} else {
position.setTime(new Date(payload.getInt("gnss.ts") * 1000L));
position.setLatitude(payload.getJsonNumber("gnss.latitude").doubleValue());
position.setLongitude(payload.getJsonNumber("gnss.longitude").doubleValue());
}
position.setAltitude(payload.getJsonNumber("gnss.altitude").doubleValue());
position.setSpeed(payload.getJsonNumber("gnss.speed").doubleValue());
position.setCourse(payload.getJsonNumber("gnss.heading").doubleValue());
position.set(Position.KEY_SATELLITES, payload.getInt("gnss.num_sv"));
} else if (topic.contains("obd")) {
getLastLocation(position, new Date(payload.getInt("obd.ts") * 1000L));
if (payload.containsKey("obd.speed")) {
position.set(Position.KEY_OBD_SPEED, payload.getJsonNumber("obd.speed").doubleValue());
}
if (payload.containsKey("obd.odo")) {
position.set(Position.KEY_OBD_ODOMETER, payload.getInt("obd.odo"));
}
if (payload.containsKey("obd.rpm")) {
position.set(Position.KEY_RPM, payload.getInt("obd.rpm"));
}
if (payload.containsKey("obd.vin")) {
position.set(Position.KEY_VIN, payload.getString("obd.vin"));
}
} else if (topic.contains("cellular1")) {
getLastLocation(position, new Date(payload.getInt("modem1.ts") * 1000L));
} else {
return null;
}
return position;
}
}
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