1 files changed, 114 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
new file mode 100644
index 000000000..abf208a46
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
@@ -0,0 +1,114 @@
+/*
+ * 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.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Gt30ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gt30ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$$")
+            .number("x{4}")                      // length
+            .expression("(.{14})")               // device id
+            .number("x{4}")                      // type
+            .expression("(.)?")                  // alarm
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .expression("[^\\|]*")
+            .number("|(d+.d+)")                  // hdop
+            .number("|(-?d+)")                   // altitude
+            .number("x{4}")                      // checksum
+            .compile();
+
+    private String decodeAlarm(int value) {
+        switch (value) {
+            case 0x01:
+            case 0x02:
+            case 0x03:
+                return Position.ALARM_SOS;
+            case 0x10:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_OVERSPEED;
+            case 0x12:
+                return Position.ALARM_GEOFENCE;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next().trim());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ALARM, decodeAlarm(parser.next().charAt(0)));
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        position.setAltitude(parser.nextDouble(0));
+
+        return position;
+    }
+
+}