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/*
* Copyright 2023 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.JsonObject;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.helper.DateUtil;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
public class DraginoProtocolDecoder extends BaseHttpProtocolDecoder {
public DraginoProtocolDecoder(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 json = Json.createReader(new StringReader(content)).readObject();
String deviceId = json.getJsonObject("end_device_ids").getString("device_id");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId);
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
JsonObject message = json.getJsonObject("uplink_message");
JsonObject decoded = message.getJsonObject("decoded_payload");
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(DateUtil.parseDate(message.getString("received_at")));
position.setValid(true);
position.setLatitude(decoded.getJsonNumber("Latitude").doubleValue());
position.setLongitude(decoded.getJsonNumber("Longitude").doubleValue());
position.set("humidity", decoded.getJsonNumber("Hum").doubleValue());
position.set(Position.KEY_BATTERY, decoded.getJsonNumber("BatV").doubleValue());
position.set(Position.PREFIX_TEMP + 1, decoded.getJsonNumber("Tem").doubleValue());
if (Boolean.parseBoolean(decoded.getString("ALARM_status"))) {
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
}
sendResponse(channel, HttpResponseStatus.OK);
return position;
}
}
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