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/*
* Copyright 2024 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 io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import jakarta.json.Json;
import jakarta.json.JsonArray;
import jakarta.json.JsonObject;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class ValtrackProtocolDecoder extends BaseHttpProtocolDecoder {
public ValtrackProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpRequest request = (FullHttpRequest) msg;
String content = request.content().toString(StandardCharsets.UTF_8);
JsonObject object = Json.createReader(new StringReader(content)).readObject();
JsonArray messages = object.getJsonArray("resource");
List<Position> positions = new LinkedList<>();
for (int i = 0; i < messages.size(); i++) {
JsonObject message = messages.getJsonObject(i);
String id = message.getString("devid");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
continue;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(true);
position.setTime(new Date());
position.setLatitude(Double.parseDouble(message.getString("lat")));
position.setLongitude(Double.parseDouble(message.getString("lon")));
String speed = message.getString("speed");
if (!speed.isEmpty()) {
position.setSpeed(Double.parseDouble(speed));
}
position.set(Position.KEY_BATTERY, Double.parseDouble(message.getString("vbat")));
positions.add(position);
}
sendResponse(channel, HttpResponseStatus.OK);
return positions;
}
}
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