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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.session.DeviceSession;
import org.traccar.Protocol;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;
import jakarta.json.Json;
import jakarta.json.JsonArray;
import jakarta.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class B2316ProtocolDecoder extends BaseProtocolDecoder {
public B2316ProtocolDecoder(Protocol protocol) {
super(protocol);
}
private String decodeAlarm(int value) {
return switch (value) {
case 1 -> Position.ALARM_LOW_BATTERY;
case 2 -> Position.ALARM_SOS;
case 3 -> Position.ALARM_POWER_OFF;
case 4 -> Position.ALARM_REMOVING;
default -> null;
};
}
private Integer decodeBattery(int value) {
return switch (value) {
case 0 -> 10;
case 1 -> 30;
case 2 -> 60;
case 3 -> 80;
case 4 -> 100;
default -> null;
};
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
JsonObject root = Json.createReader(new StringReader((String) msg)).readObject();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, root.getString("imei"));
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
JsonArray data = root.getJsonArray("data");
for (int i = 0; i < data.size(); i++) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
Network network = new Network();
JsonObject item = data.getJsonObject(i);
Date time = new Date(item.getJsonNumber("tm").longValue() * 1000);
if (item.containsKey("gp")) {
String[] coordinates = item.getString("gp").split(",");
position.setLongitude(Double.parseDouble(coordinates[0]));
position.setLatitude(Double.parseDouble(coordinates[1]));
position.setValid(true);
position.setTime(time);
} else {
getLastLocation(position, time);
}
if (item.containsKey("ci")) {
String[] cell = item.getString("ci").split(",");
network.addCellTower(CellTower.from(
Integer.parseInt(cell[0]), Integer.parseInt(cell[1]),
Integer.parseInt(cell[2]), Integer.parseInt(cell[3]),
Integer.parseInt(cell[4])));
}
if (item.containsKey("wi")) {
String[] points = item.getString("wi").split(";");
for (String point : points) {
String[] values = point.split(",");
String mac = values[0].replaceAll("(..)", "$1:");
network.addWifiAccessPoint(WifiAccessPoint.from(
mac.substring(0, mac.length() - 1), Integer.parseInt(values[1])));
}
}
if (item.containsKey("wn")) {
position.set(Position.KEY_ALARM, decodeAlarm(item.getInt("wn")));
}
if (item.containsKey("ic")) {
position.set(Position.KEY_ICCID, item.getString("ic"));
}
if (item.containsKey("ve")) {
position.set(Position.KEY_VERSION_FW, item.getString("ve"));
}
if (item.containsKey("te")) {
String[] temperatures = item.getString("te").split(",");
for (int j = 0; j < temperatures.length; j++) {
position.set(Position.PREFIX_TEMP + (j + 1), Integer.parseInt(temperatures[j]) * 0.1);
}
}
if (item.containsKey("st")) {
position.set(Position.KEY_STEPS, item.getInt("st"));
}
if (item.containsKey("ba")) {
position.set(Position.KEY_BATTERY_LEVEL, decodeBattery(item.getInt("ba")));
}
if (item.containsKey("sn")) {
position.set(Position.KEY_RSSI, item.getInt("sn"));
}
if (item.containsKey("hr")) {
position.set(Position.KEY_HEART_RATE, item.getInt("hr"));
}
if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
position.setNetwork(network);
}
positions.add(position);
}
return positions.isEmpty() ? null : positions;
}
}
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