aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/Tlt2hProtocolDecoder.java
blob: 0e17fc70c915199061dfcca54613c367ea968760 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
 * Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
 *
 * 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 java.util.Calendar;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;

import org.traccar.BaseProtocolDecoder;
import org.traccar.database.DataManager;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;

public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {

    public Tlt2hProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
        super(dataManager, protocol, properties);
    }

    private static final Pattern patternHeader = Pattern.compile(
            "#(\\d+)#" +                   // IMEI
            "[^#]+#" +
            "\\d+#" +
            "([^#]+)#" +                   // Status
            "\\d+");                       // Number of records

    private static final Pattern patternPosition = Pattern.compile(
            "#([0-9a-f]+)?" +              // Cell info
            "\\$GPRMC," +
            "(\\d{2})(\\d{2})(\\d{2})\\.(\\d+)," + // Time (HHMMSS.SSS)
            "([AV])," +                    // Validity
            "(\\d+)(\\d{2}\\.\\d+)," +     // Latitude (DDMM.MMMM)
            "([NS])," +
            "(\\d+)(\\d{2}\\.\\d+)," +     // Longitude (DDDMM.MMMM)
            "([EW])," +
            "(\\d+\\.\\d+)?," +            // Speed
            "(\\d+\\.\\d+)?," +            // Course
            "(\\d{2})(\\d{2})(\\d{2})" +   // Date (DDMMYY)
            ".+");                         // Other (Checksumm)

    @Override
    protected Object decode(
            ChannelHandlerContext ctx, Channel channel, Object msg)
            throws Exception {

        String sentence = (String) msg;
        sentence = sentence.trim();

        // Decode header
        String header = sentence.substring(0, sentence.indexOf('\r'));
        Matcher parser = patternHeader.matcher(header);
        if (!parser.matches()) {
            return null;
        }

        // Get device identifier
        String imei = parser.group(1);
        long deviceId;
        try {
            deviceId = getDataManager().getDeviceByImei(imei).getId();
        } catch(Exception error) {
            Log.warning("Unknown device - " + imei);
            return null;
        }
        
        // Get status
        String status = parser.group(2);
        
        String[] messages = sentence.substring(sentence.indexOf('\n') + 1).split("\r\n");
        List<Position> positions = new LinkedList<Position>();
        
        for (String message : messages) {
            parser = patternPosition.matcher(message);
            if (parser.matches()) {
                Position position = new Position();
                ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
                position.setDeviceId(deviceId);

                Integer index = 1;
                
                // Cell
                extendedInfo.set("cell", parser.group(index++));

                // Time
                Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
                time.clear();
                time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++)));
                time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
                time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
                index += 1; // Skip milliseconds

                // Validity
                position.setValid(parser.group(index++).compareTo("A") == 0);

                // Latitude
                Double latitude = Double.valueOf(parser.group(index++));
                latitude += Double.valueOf(parser.group(index++)) / 60;
                if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
                position.setLatitude(latitude);

                // Longitude
                Double longitude = Double.valueOf(parser.group(index++));
                longitude += Double.valueOf(parser.group(index++)) / 60;
                if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
                position.setLongitude(longitude);

                // Speed
                String speed = parser.group(index++);
                if (speed != null) {
                    position.setSpeed(Double.valueOf(speed));
                } else {
                    position.setSpeed(0.0);
                }

                // Course
                String course = parser.group(index++);
                if (course != null) {
                    position.setCourse(Double.valueOf(course));
                } else {
                    position.setCourse(0.0);
                }

                // Date
                time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
                time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
                time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
                position.setTime(time.getTime());

                // Altitude
                position.setAltitude(0.0);
                
                // Status
                extendedInfo.set("status", status);
                
                position.setExtendedInfo(extendedInfo.toString());
                positions.add(position);
            }
        }

        return positions;
    }

}