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/*
* Copyright 2018 - 2020 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.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.config.Keys;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class EsealProtocolDecoder extends BaseProtocolDecoder {
private String config;
public EsealProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected void init() {
config = getConfig().getString(Keys.PROTOCOL_CONFIG.withPrefix(getProtocolName()));
}
private static final Pattern PATTERN = new PatternBuilder()
.text("##S,")
.expression("[^,]+,") // device type
.number("(d+),") // device id
.number("d+,") // customer id
.expression("[^,]+,") // firmware version
.expression("([^,]+),") // type
.number("(d+),") // index
.number("(dddd)-(dd)-(dd),") // date
.number("(dd):(dd):(dd),") // time
.number("d+,") // interval
.expression("([AV]),") // validity
.number("(d+.d+)([NS]) ") // latitude
.number("(d+.d+)([EW]),") // longitude
.number("(d+),") // course
.number("(d+),") // speed
.expression("([^,]+),") // door
.number("(d+.d+),") // acceleration
.expression("([^,]+),") // nfc
.number("(d+.d+),") // battery
.number("(-?d+),") // rssi
.text("E##")
.compile();
private void sendResponse(Channel channel, String prefix, String type, String payload) {
if (channel != null) {
channel.writeAndFlush(new NetworkMessage(
prefix + type + "," + payload + ",E##\r\n", channel.remoteAddress()));
}
}
private String decodeAlarm(String type) {
return switch (type) {
case "Event-Door" -> Position.ALARM_DOOR;
case "Event-Shock" -> Position.ALARM_VIBRATION;
case "Event-Drop" -> Position.ALARM_FALL_DOWN;
case "Event-Lock" -> Position.ALARM_LOCK;
case "Event-RC-Unlock" -> Position.ALARM_UNLOCK;
default -> null;
};
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
String type = parser.next();
String prefix = sentence.substring(0, sentence.indexOf(type));
int index = parser.nextInt();
position.set(Position.KEY_INDEX, index);
position.set(Position.KEY_ALARM, decodeAlarm(type));
switch (type) {
case "Startup":
sendResponse(channel, prefix, type + " ACK", index + "," + config);
break;
case "Normal":
case "Button-Normal":
case "Termination":
case "Event-Door":
case "Event-Shock":
case "Event-Drop":
case "Event-Lock":
case "Event-RC-Unlock":
sendResponse(channel, prefix, type + " ACK", String.valueOf(index));
break;
default:
break;
}
position.setTime(parser.nextDateTime());
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setCourse(parser.nextInt());
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
switch (parser.next()) {
case "Open" -> position.set(Position.KEY_DOOR, true);
case "Close" -> position.set(Position.KEY_DOOR, false);
}
position.set(Position.KEY_ACCELERATION, parser.nextDouble());
position.set("nfc", parser.next());
position.set(Position.KEY_BATTERY, parser.nextDouble());
position.set(Position.KEY_RSSI, parser.nextInt());
return position;
}
}
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