1 files changed, 146 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/WristbandProtocolDecoder.java b/src/org/traccar/protocol/WristbandProtocolDecoder.java
new file mode 100644
index 000000000..f62836765
--- /dev/null
+++ b/src/org/traccar/protocol/WristbandProtocolDecoder.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 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.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+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.nio.charset.StandardCharsets;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class WristbandProtocolDecoder extends BaseProtocolDecoder {
+
+    public WristbandProtocolDecoder(WristbandProtocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(
+            Channel channel, String imei, String version, int type, String data) {
+
+        if (channel != null) {
+            String sentence = String.format("YX%s|%s|0|{F%d#%s}\r\n", imei, version, type, data);
+            ByteBuf response = Unpooled.buffer();
+            response.writeBytes(new byte[]{0x00, 0x01, 0x02});
+            response.writeShort(sentence.length());
+            response.writeCharSequence(sentence, StandardCharsets.US_ASCII);
+            response.writeBytes(new byte[]{(byte) 0xFF, (byte) 0xFE, (byte) 0xFC});
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("..")                    // header
+            .number("(d+)|")                     // imei
+            .number("(vd+.d+)|")                 // version
+            .number("d+|")                       // model
+            .text("{")
+            .number("F(d+)")                     // function
+            .groupBegin()
+            .text("#")
+            .expression("(.*)")                  // data
+            .groupEnd("?")
+            .text("}")
+            .text("\r\n")
+            .compile();
+
+    private Position decodePosition(DeviceSession deviceSession, String sentence) throws ParseException {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String[] values = sentence.split(",");
+
+        position.setValid(true);
+        position.setLongitude(Double.parseDouble(values[0]));
+        position.setLatitude(Double.parseDouble(values[1]));
+        position.setTime(new SimpleDateFormat("yyyyMMddHHmmss").parse(values[2]));
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[3])));
+
+        return position;
+    }
+
+    private List<Position> decodeMessage(
+            Channel channel, SocketAddress remoteAddress, String sentence) throws ParseException {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        String version = parser.next();
+        int type = parser.nextInt();
+
+        List<Position> positions = new LinkedList<>();
+
+        switch (type) {
+            case 90:
+                sendResponse(channel, imei, version, type, getServer(channel));
+                break;
+            case 91:
+                String time = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
+                sendResponse(channel, imei, version, type, time + "|" + getServer(channel));
+                break;
+            case 1:
+                sendResponse(channel, imei, version, type, "0");
+                break;
+            case 2:
+                for (String fragment : parser.next().split("\\|")) {
+                    positions.add(decodePosition(deviceSession, fragment));
+                }
+                break;
+            default:
+                break;
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        buf.skipBytes(3); // header
+        buf.readUnsignedShort(); // length
+
+        String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 3, StandardCharsets.US_ASCII);
+
+        buf.skipBytes(3); // footer
+
+        return decodeMessage(channel, remoteAddress, sentence);
+    }
+
+}