/*
* Copyright 2014 - 2017 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 org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BitUtil;
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 MiniFinderProtocolDecoder extends BaseProtocolDecoder {
public MiniFinderProtocolDecoder(MiniFinderProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_FIX = new PatternBuilder()
.number("(d+)/(d+)/(d+),") // date (dd/mm/yy)
.number("(d+):(d+):(d+),") // time (hh:mm:ss)
.number("(-?d+.d+),") // latitude
.number("(-?d+.d+),") // longitude
.compile();
private static final Pattern PATTERN_STATE = new PatternBuilder()
.number("(d+.?d*),") // speed (km/h)
.number("(d+.?d*),") // course
.number("(x+),") // flags
.number("(-?d+.d+),") // altitude (meters)
.number("(d+),") // battery (percentage)
.compile();
private static final Pattern PATTERN_A = new PatternBuilder()
.text("!A,")
.expression(PATTERN_FIX.pattern())
.any() // unknown 3 fields
.compile();
private static final Pattern PATTERN_C = new PatternBuilder()
.text("!C,")
.expression(PATTERN_FIX.pattern())
.expression(PATTERN_STATE.pattern())
.any() // unknown 3 fields
.compile();
private static final Pattern PATTERN_BD = new PatternBuilder()
.expression("![BD],") // B - buffered, D - live
.expression(PATTERN_FIX.pattern())
.expression(PATTERN_STATE.pattern())
.number("(d+),") // satellites in use
.number("(d+),") // satellites in view
.number("(d+.?d*)") // hdop
.compile();
private void decodeFix(Position position, Parser parser) {
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
position.setLatitude(parser.nextDouble(0));
position.setLongitude(parser.nextDouble(0));
}
private void decodeFlags(Position position, int flags) {
position.setValid(BitUtil.to(flags, 2) > 0);
if (BitUtil.check(flags, 1)) {
position.set(Position.KEY_APPROXIMATE, true);
}
if (BitUtil.check(flags, 2)) {
position.set(Position.KEY_ALARM, Position.ALARM_FAULT);
}
if (BitUtil.check(flags, 6)) {
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
}
if (BitUtil.check(flags, 7)) {
position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
}
if (BitUtil.check(flags, 8)) {
position.set(Position.KEY_ALARM, Position.ALARM_FALL_DOWN);
}
if (BitUtil.check(flags, 9) || BitUtil.check(flags, 10) || BitUtil.check(flags, 11)) {
position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE);
}
if (BitUtil.check(flags, 12)) {
position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
}
if (BitUtil.check(flags, 15) || BitUtil.check(flags, 14)) {
position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
}
position.set(Position.KEY_RSSI, BitUtil.between(flags, 16, 21));
position.set(Position.KEY_CHARGE, BitUtil.check(flags, 22));
}
private void decodeState(Position position, Parser parser) {
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
position.setCourse(parser.nextDouble(0));
if (position.getCourse() > 360) {
position.setCourse(0);
}
decodeFlags(position, parser.nextHexInt(0));
position.setAltitude(parser.nextDouble(0));
position.set(Position.KEY_BATTERY, parser.nextInt(0));
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("!1,")) {
getDeviceSession(channel, remoteAddress, sentence.substring(3, sentence.length()));
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null || !sentence.matches("![A-D],.*")) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
String type = sentence.substring(1, 2);
position.set(Position.KEY_TYPE, type);
if (type.equals("B") || type.equals("D")) {
Parser parser = new Parser(PATTERN_BD, sentence);
if (!parser.matches()) {
return null;
}
decodeFix(position, parser);
decodeState(position, parser);
position.set(Position.KEY_SATELLITES, parser.nextInt(0));
position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt(0));
position.set(Position.KEY_HDOP, parser.nextDouble(0));
return position;
} else if (type.equals("C")) {
Parser parser = new Parser(PATTERN_C, sentence);
if (!parser.matches()) {
return null;
}
decodeFix(position, parser);
decodeState(position, parser);
return position;
} else if (type.equals("A")) {
Parser parser = new Parser(PATTERN_A, sentence);
if (!parser.matches()) {
return null;
}
decodeFix(position, parser);
return position;
}
return null;
}
}