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/*
* Copyright 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 io.netty.handler.codec.http.FullHttpResponse;
import org.traccar.BasePipelineFactory;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.json.JsonValue;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.LinkedList;
import java.util.TimeZone;
public class OrbcommProtocolDecoder extends BaseProtocolDecoder {
public OrbcommProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpResponse response = (FullHttpResponse) msg;
String content = response.content().toString(StandardCharsets.UTF_8);
JsonObject json = Json.createReader(new StringReader(content)).readObject();
if (channel != null && !json.getString("NextStartUTC").isEmpty()) {
OrbcommProtocolPoller poller =
BasePipelineFactory.getHandler(channel.pipeline(), OrbcommProtocolPoller.class);
if (poller != null) {
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
poller.setStartTime(dateFormat.parse(json.getString("NextStartUTC")));
}
}
if (json.get("Messages").getValueType() == JsonValue.ValueType.NULL) {
return null;
}
LinkedList<Position> positions = new LinkedList<>();
JsonArray messages = json.getJsonArray("Messages");
for (int i = 0; i < messages.size(); i++) {
JsonObject message = messages.getJsonObject(i);
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, true, message.getString("MobileID"));
if (deviceSession != null) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
position.setDeviceTime(dateFormat.parse(message.getString("MessageUTC")));
JsonArray fields = message.getJsonObject("Payload").getJsonArray("Fields");
for (int j = 0; j < fields.size(); j++) {
JsonObject field = fields.getJsonObject(j);
String value = field.getString("Value");
switch (field.getString("Name").toLowerCase()) {
case "latitude":
position.setLatitude(Integer.parseInt(value) / 60000.0);
break;
case "longitude":
position.setLongitude(Integer.parseInt(value) / 60000.0);
break;
case "speed":
position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(value)));
break;
case "heading":
int heading = Integer.parseInt(value);
position.setCourse(heading <= 360 ? heading : 0);
break;
default:
break;
}
}
if (position.getLatitude() != 0 && position.getLongitude() != 0) {
position.setValid(true);
position.setFixTime(position.getDeviceTime());
} else {
getLastLocation(position, position.getDeviceTime());
}
positions.add(position);
}
}
return positions.isEmpty() ? null : positions;
}
}
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