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/*
* Copyright 2017 - 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 io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.OffsetDateTime;
import java.util.Collection;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.TimeZone;
public class DmtHttpProtocolDecoder extends BaseHttpProtocolDecoder {
public DmtHttpProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpRequest request = (FullHttpRequest) msg;
JsonObject root = Json.createReader(
new StringReader(request.content().toString(StandardCharsets.US_ASCII))).readObject();
Object result;
if (root.containsKey("device")) {
result = decodeEdge(channel, remoteAddress, root);
} else {
result = decodeTraditional(channel, remoteAddress, root);
}
sendResponse(channel, result != null ? HttpResponseStatus.OK : HttpResponseStatus.BAD_REQUEST);
return result;
}
private Collection<Position> decodeTraditional(
Channel channel, SocketAddress remoteAddress, JsonObject root) throws ParseException {
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, root.getString("IMEI"));
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
JsonArray records = root.getJsonArray("Records");
for (int i = 0; i < records.size(); i++) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
JsonObject record = records.getJsonObject(i);
position.set(Position.KEY_INDEX, record.getInt("SeqNo"));
position.set(Position.KEY_EVENT, record.getInt("Reason"));
position.setDeviceTime(dateFormat.parse(record.getString("DateUTC")));
JsonArray fields = record.getJsonArray("Fields");
for (int j = 0; j < fields.size(); j++) {
JsonObject field = fields.getJsonObject(j);
switch (field.getInt("FType")) {
case 0:
position.setFixTime(dateFormat.parse(field.getString("GpsUTC")));
position.setLatitude(field.getJsonNumber("Lat").doubleValue());
position.setLongitude(field.getJsonNumber("Long").doubleValue());
position.setAltitude(field.getInt("Alt"));
position.setSpeed(UnitsConverter.knotsFromCps(field.getInt("Spd")));
position.setCourse(field.getInt("Head"));
position.setAccuracy(field.getInt("PosAcc"));
position.setValid(field.getInt("GpsStat") > 0);
break;
case 2:
int input = field.getInt("DIn");
int output = field.getInt("DOut");
position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
position.set(Position.KEY_INPUT, input);
position.set(Position.KEY_OUTPUT, output);
position.set(Position.KEY_STATUS, field.getInt("DevStat"));
break;
case 6:
JsonObject adc = field.getJsonObject("AnalogueData");
if (adc.containsKey("1")) {
position.set(Position.KEY_BATTERY, adc.getInt("1") * 0.001);
}
if (adc.containsKey("2")) {
position.set(Position.KEY_POWER, adc.getInt("2") * 0.01);
}
if (adc.containsKey("3")) {
position.set(Position.KEY_DEVICE_TEMP, adc.getInt("3") * 0.01);
}
if (adc.containsKey("4")) {
position.set(Position.KEY_RSSI, adc.getInt("4"));
}
if (adc.containsKey("5")) {
position.set("solarPower", adc.getInt("5") * 0.001);
}
break;
default:
break;
}
}
positions.add(position);
}
return positions;
}
private Position decodeEdge(
Channel channel, SocketAddress remoteAddress, JsonObject root) {
JsonObject device = root.getJsonObject("device");
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, device.getString("imei"));
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
Date time = new Date(OffsetDateTime.parse(root.getString("date")).toInstant().toEpochMilli());
if (root.containsKey("lat") && root.containsKey("lng")) {
position.setValid(true);
position.setTime(time);
position.setLatitude(root.getJsonNumber("lat").doubleValue());
position.setLongitude(root.getJsonNumber("lng").doubleValue());
position.setAccuracy(root.getJsonNumber("posAcc").doubleValue());
} else {
getLastLocation(position, time);
}
position.set(Position.KEY_INDEX, root.getInt("sqn"));
position.set(Position.KEY_EVENT, root.getInt("reason"));
JsonArray analogues = root.getJsonArray("analogues");
for (int i = 0; i < analogues.size(); i++) {
JsonObject adc = analogues.getJsonObject(i);
position.set(Position.PREFIX_ADC + adc.getInt("id"), adc.getInt("val"));
}
position.set(Position.KEY_INPUT, root.getInt("inputs"));
position.set(Position.KEY_OUTPUT, root.getInt("outputs"));
position.set(Position.KEY_STATUS, root.getInt("status"));
return position;
}
}
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