Implement PST open protocol

1 files changed, 111 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/PstProtocolDecoder.java b/src/main/java/org/traccar/protocol/PstProtocolDecoder.java
new file mode 100644
index 000000000..40caa9727
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PstProtocolDecoder.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2019 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.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class PstProtocolDecoder extends BaseProtocolDecoder {
+
+    public PstProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_STATUS = 0x05;
+
+    private Date readDate(ByteBuf buf) {
+        long value = buf.readUnsignedInt();
+        return new DateBuilder()
+                .setYear((int) BitUtil.between(value, 26, 32))
+                .setMonth((int) BitUtil.between(value, 22, 26))
+                .setDay((int) BitUtil.between(value, 17, 22))
+                .setMonth((int) BitUtil.between(value, 12, 17))
+                .setMonth((int) BitUtil.between(value, 6, 12))
+                .setMonth((int) BitUtil.between(value, 0, 6)).getDate();
+    }
+
+    private double readCoordinate(ByteBuf buf) {
+        long value = buf.readUnsignedInt();
+        return (BitUtil.from(value, 16) + BitUtil.to(value, 16) * 0.00001) / 60;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        String id = String.valueOf(buf.readUnsignedInt());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.readUnsignedByte(); // version
+        buf.readUnsignedInt(); // index
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_STATUS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setDeviceTime(readDate(buf));
+
+            buf.readUnsignedByte();
+
+            int count = buf.readUnsignedByte();
+            for (int i = 0; i < count; i++) {
+
+                int tag = buf.readUnsignedByte();
+                int length = buf.readUnsignedByte();
+
+                switch (tag) {
+                    case 0x0D:
+                        position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte() * 5);
+                        break;
+                    case 0x10:
+                        position.setFixTime(readDate(buf));
+                        position.setLatitude(readCoordinate(buf));
+                        position.setLongitude(readCoordinate(buf));
+                        position.setSpeed(buf.readUnsignedByte());
+                        position.setCourse(buf.readUnsignedByte() * 2);
+                        position.setAltitude(buf.readShort());
+                        buf.readUnsignedInt(); // gps condition
+                        break;
+                    default:
+                        buf.skipBytes(length);
+                        break;
+                }
+            }
+
+            return position;
+        }
+
+        return null;
+    }
+
+}