From 3ee4d2fba538eee4d1774bd79e07c64dc0af97e5 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Tue, 13 Nov 2012 21:58:17 +1300
Subject: Added TR20 support (Fix #79)

---
 src/org/traccar/protocol/Tr20ProtocolDecoder.java | 142 ++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 src/org/traccar/protocol/Tr20ProtocolDecoder.java

(limited to 'src/org/traccar/protocol')

diff --git a/src/org/traccar/protocol/Tr20ProtocolDecoder.java b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
new file mode 100644
index 000000000..8f2f49218
--- /dev/null
+++ b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2012 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.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.GenericProtocolDecoder;
+import org.traccar.model.DataManager;
+import org.traccar.model.Position;
+
+/**
+ * TR20 tracker protocol decoder
+ */
+public class Tr20ProtocolDecoder extends GenericProtocolDecoder {
+
+    /**
+     * Initialize
+     */
+    public Tr20ProtocolDecoder(DataManager dataManager) {
+        super(dataManager);
+    }
+
+    static private Pattern patternPing = Pattern.compile(
+            "\\%\\%[^,]+,(\\d+)");
+
+    //%%TR-10,A,050916070549,N2240.8887E11359.2994,0,000,NA,D3800000,150,CFG:resend|
+    //%%123456789012345,A,120101121800,N6000.0000E13000.0000,0,000,0,01034802,150,[Message]
+    static private Pattern patternData = Pattern.compile(
+            "\\%\\%" +
+            "([^,]+)," +                   // Id
+            "([AL])," +                    // Validity
+            "(\\d{2})(\\d{2})(\\d{2})" +   // Date (YYMMDD)
+            "(\\d{2})(\\d{2})(\\d{2})," +  // Time (HHMMSS)
+            "([NS])" +
+            "(\\d{2})(\\d{2}\\.\\d+)" +    // Latitude (DDMM.MMMM)
+            "([EW])" +
+            "(\\d{3})(\\d{2}\\.\\d+)," +   // Longitude (DDDMM.MMMM)
+            "(\\d+)," +                    // Speed
+            "(\\d+)," +                    // Course
+            ".*");
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+
+        // Keep alive message
+        Matcher parser = patternPing.matcher(sentence);
+        if (parser.matches()) {
+            
+            // Send response
+            if (channel != null) {
+                channel.write("&&" + parser.group(1) + "\r\n");
+            }
+        } else {
+            
+            // Data message parse
+            parser = patternData.matcher(sentence);
+            
+            // Unknown message
+            if (!parser.matches()) {
+                return null;
+            }
+
+            // Create new position
+            Position position = new Position();
+            StringBuilder extendedInfo = new StringBuilder("<protocol>tr20</protocol>");
+
+            Integer index = 1;
+            
+            // Get device by id
+            String id = parser.group(index++);
+            position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
+            
+            // Validity
+            position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false);
+            
+            // Time
+            Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+            time.clear();
+            time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
+            time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
+            time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
+            time.set(Calendar.HOUR, Integer.parseInt(parser.group(index++)));
+            time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
+            time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
+            position.setTime(time.getTime());
+            
+            // Latitude
+            int hemisphere = 1;
+            if (parser.group(index++).compareTo("S") == 0) hemisphere = -1;
+            Double latitude = Double.valueOf(parser.group(index++));
+            latitude += Double.valueOf(parser.group(index++)) / 60;
+            position.setLatitude(latitude * hemisphere);
+
+            // Longitude
+            hemisphere = 1;
+            if (parser.group(index++).compareTo("W") == 0) hemisphere = -1;
+            Double lonlitude = Double.valueOf(parser.group(index++));
+            lonlitude += Double.valueOf(parser.group(index++)) / 60;
+            position.setLongitude(lonlitude * hemisphere);
+
+            // Speed
+            position.setSpeed(Double.valueOf(parser.group(index++)));
+
+            // Course
+            position.setCourse(Double.valueOf(parser.group(index++)));
+
+            // Altitude
+            position.setAltitude(0.0);
+            
+            // Extended info
+            position.setExtendedInfo(extendedInfo.toString());
+            
+            return position;
+        }
+
+        return null;
+    }
+
+}
-- 
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