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path: root/src/main/java/org/traccar/protocol/StartekProtocolDecoder.java
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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.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;

import java.net.SocketAddress;
import java.util.regex.Pattern;

public class StartekProtocolDecoder extends BaseProtocolDecoder {

    public StartekProtocolDecoder(Protocol protocol) {
        super(protocol);
    }

    private static final Pattern PATTERN = new PatternBuilder()
            .text("&&")
            .expression(".")                     // index
            .number("d+,")                       // length
            .number("(d+),")                     // imei
            .number("xxx,")                      // command
            .number("(d+),")                     // event
            .expression("[^,]*,")                // event data
            .number("(dd)(dd)(dd)")              // date (yyymmdd)
            .number("(dd)(dd)(dd),")             // time (hhmmss)
            .expression("([AV]),")               // valid
            .number("(-?d+.d+),")                // longitude
            .number("(-?d+.d+),")                // latitude
            .number("(d+),")                     // satellites
            .number("(d+.d+),")                  // hdop
            .number("(d+),")                     // speed
            .number("(d+),")                     // course
            .number("(-?d+),")                   // altitude
            .number("(d+),")                     // odometer
            .number("(d+)|")                     // mcc
            .number("(d+)|")                     // mnc
            .number("(x+)|")                     // lac
            .number("(x+),")                     // cid
            .number("(d+),")                     // rssi
            .number("(x+),")                     // status
            .number("(x+),")                     // inputs
            .number("(x+),")                     // outputs
            .number("(x+)|")                     // power
            .number("(x+)|")                     // battery
            .expression("([^,]+),")              // adc
            .number("d,")                        // extended
            .any()
            .compile();

    private String decodeAlarm(int value) {
        switch (value) {
            case 5:
            case 6:
                return Position.ALARM_DOOR;
            case 39:
                return Position.ALARM_ACCELERATION;
            case 40:
                return Position.ALARM_BRAKING;
            case 41:
                return Position.ALARM_CORNERING;
            default:
                return null;
        }
    }

    @Override
    protected Object decode(
            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

        Parser parser = new Parser(PATTERN, (String) msg);
        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());

        int event = parser.nextInt();
        position.set(Position.KEY_ALARM, decodeAlarm(event));
        position.set(Position.KEY_EVENT, event);

        position.setTime(parser.nextDateTime());
        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextDouble());
        position.setLongitude(parser.nextDouble());

        position.set(Position.KEY_SATELLITES, parser.nextInt());
        position.set(Position.KEY_HDOP, parser.nextDouble());

        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
        position.setCourse(parser.nextInt());
        position.setAltitude(parser.nextInt());

        position.set(Position.KEY_ODOMETER, parser.nextInt());

        position.setNetwork(new Network(CellTower.from(
                parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt(), parser.nextInt())));

        position.set(Position.KEY_STATUS, parser.nextHexInt());
        position.set(Position.KEY_INPUT, parser.nextHexInt());
        position.set(Position.KEY_OUTPUT, parser.nextHexInt());

        position.set(Position.KEY_POWER, parser.nextHexInt() * 0.01);
        position.set(Position.KEY_BATTERY, parser.nextHexInt() * 0.01);

        String[] adc = parser.next().split("\\|");
        for (int i = 0; i < adc.length; i++) {
            position.set(Position.PREFIX_ADC + (i + 1), Integer.parseInt(adc[i], 16) * 0.01);
        }

        return position;
    }

}