From 773768093c6c78906e54abe128cb1b4ca9430313 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Wed, 18 Apr 2018 15:51:38 +1200
Subject: Support Atrack text message format

---
 .../traccar/protocol/AtrackProtocolDecoder.java    | 92 +++++++++++++++++++---
 1 file changed, 81 insertions(+), 11 deletions(-)

(limited to 'src/org')

diff --git a/src/org/traccar/protocol/AtrackProtocolDecoder.java b/src/org/traccar/protocol/AtrackProtocolDecoder.java
index 8138f0fcb..ac208c0f2 100644
--- a/src/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -219,7 +219,8 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
-    private Position decodeString(Channel channel, SocketAddress remoteAddress, String sentence) {
+    private Position decodeInfo(Channel channel, SocketAddress remoteAddress, String sentence) {
+
         Position position = new Position(getProtocolName());
 
         getLastLocation(position, null);
@@ -258,21 +259,70 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("@P,")
+            .number("x+,")                       // checksum
+            .number("d+,")                       // length
+            .number("d+,")                       // index
+            .number("(d+),")                     // imei
+            .number("(dddd)(dd)(dd)")            // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("d+,")                       // rtc date and time
+            .number("d+,")                       // device date and time
+            .number("(-?d+),")                   // longitude
+            .number("(-?d+),")                   // latitude
+            .number("(d+),")                     // course
+            .number("(d+),")                     // report id
+            .number("(d+.d+),")                  // odometer
+            .number("(d+),")                     // hdop
+            .number("(d+),")                     // inputs
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // outputs
+            .number("(d+),")                     // adc
+            .number("[^,]*,")                    // driver
+            .number("(d+),")                     // temp1
+            .number("(d+),")                     // temp2
+            .any()
+            .compile();
 
-        ChannelBuffer buf = (ChannelBuffer) msg;
+    private Position decodeText(Channel channel, SocketAddress remoteAddress, String sentence) {
 
-        if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {
-            if (channel != null) {
-                channel.write(buf, remoteAddress); // keep-alive message
-            }
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
             return null;
-        } else if (buf.getByte(buf.readerIndex()) == '$') {
-            return decodeString(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
         }
 
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLongitude(parser.nextInt() * 0.000001);
+        position.setLatitude(parser.nextInt() * 0.000001);
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_EVENT, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 100);
+        position.set(Position.KEY_HDOP, parser.nextInt() * 0.1);
+        position.set(Position.KEY_INPUT, parser.nextInt());
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 2, parser.nextInt());
+
+        return position;
+    }
+
+    private List<Position> decodeBinary(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
+
         buf.skipBytes(2); // prefix
         buf.readUnsignedShort(); // checksum
         buf.readUnsignedShort(); // length
@@ -360,4 +410,24 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         return positions;
     }
 
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {
+            if (channel != null) {
+                channel.write(buf, remoteAddress); // keep-alive message
+            }
+            return null;
+        } else if (buf.getByte(buf.readerIndex()) == '$') {
+            return decodeInfo(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
+        } else if (buf.getByte(buf.readerIndex() + 2) == ',') {
+            return decodeText(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
+        } else {
+            return decodeBinary(channel, remoteAddress, buf);
+        }
+    }
+
 }
-- 
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