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/*
* Copyright 2017 - 2018 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.NetworkMessage;
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 FlexCommProtocolDecoder extends BaseProtocolDecoder {
public FlexCommProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("7E")
.number("(dd)") // status
.number("(d{15})") // imei
.number("(dddd)(dd)(dd)") // date (yyyymmdd)
.number("(dd)(dd)(dd)") // time (hhmmss)
.expression("([01])") // valid
.number("(d{9})") // latitude
.number("(d{10})") // longitude
.number("(d{4})") // altitude
.number("(ddd)") // speed
.number("(ddd)") // course
.number("(dd)") // satellites view
.number("(dd)") // satellites used
.number("(dd)") // rssi
.number("(ddd)") // mcc
.number("(ddd)") // mnc
.number("(x{6})") // lac
.number("(x{6})") // cid
.expression("([01])([01])([01])") // input
.expression("([01])([01])") // output
.number("(ddd)") // fuel
.number("(d{4})") // temperature
.number("(ddd)") // battery
.number("(ddd)") // power
.any()
.compile();
private static double parseSignedValue(Parser parser, int decimalPoints) {
String stringValue = parser.next();
boolean negative = stringValue.charAt(0) == '1';
double value = Integer.parseInt(stringValue.substring(1)) * Math.pow(10, -decimalPoints);
return negative ? -value : value;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
Parser parser = new Parser(PATTERN, (String) msg);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.set(Position.KEY_STATUS, parser.nextInt());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(parser.nextDateTime());
position.setValid(parser.next().equals("1"));
position.setLatitude(parseSignedValue(parser, 6));
position.setLongitude(parseSignedValue(parser, 6));
position.setAltitude(parseSignedValue(parser, 0));
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
position.setCourse(parser.nextDouble(0));
position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt());
position.set(Position.KEY_SATELLITES, parser.nextInt());
position.set(Position.KEY_RSSI, parser.nextInt());
position.setNetwork(new Network(CellTower.from(
parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt())));
for (int i = 1; i <= 3; i++) {
position.set(Position.PREFIX_IN + i, parser.nextInt());
}
for (int i = 1; i <= 2; i++) {
position.set(Position.PREFIX_OUT + i, parser.nextInt());
}
position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
position.set(Position.PREFIX_TEMP + 1, parseSignedValue(parser, 0));
position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
position.set(Position.KEY_POWER, parser.nextInt() * 0.1);
if (channel != null) {
channel.writeAndFlush(new NetworkMessage("{01}", remoteAddress));
}
return position;
}
}
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