From aa7f0f856ebe5dee7e6d6639db468e3095a5b84b Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Thu, 3 Dec 2015 13:35:18 +1300
Subject: Implement command support for Meiligao

---
 .../traccar/protocol/MeiligaoProtocolEncoder.java  | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 src/org/traccar/protocol/MeiligaoProtocolEncoder.java

(limited to 'src/org/traccar/protocol/MeiligaoProtocolEncoder.java')

diff --git a/src/org/traccar/protocol/MeiligaoProtocolEncoder.java b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
new file mode 100644
index 000000000..ae93e8b73
--- /dev/null
+++ b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2015 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Log;
+import org.traccar.model.Command;
+
+import javax.xml.bind.DatatypeConverter;
+import java.nio.charset.Charset;
+import java.util.Map;
+
+public class MeiligaoProtocolEncoder extends BaseProtocolEncoder {
+
+    public static final int MSG_TRACK_ON_DEMAND = 0x4101;
+    public static final int MSG_TRACK_BY_INTERVAL = 0x4102;
+    public static final int MSG_MOVEMENT_ALARM = 0x4106;
+    public static final int MSG_TIME_ZONE = 0x4132;
+    public static final int MSG_REBOOT_GPS = 0x4902;
+
+    private ChannelBuffer encodeContent(long deviceId, int type, ChannelBuffer content) {
+
+        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
+
+        buf.writeByte('@');
+        buf.writeByte('@');
+
+        buf.writeShort(2 + 2 + 7 + 2 + content.readableBytes() + 2 + 2); // message length
+
+        buf.writeBytes(DatatypeConverter.parseHexBinary((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
+
+        buf.writeShort(type);
+
+        buf.writeBytes(content);
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.toByteBuffer()));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    // TODO: remove if not needed
+    private static int radiusToArea(int radius) {
+        if (radius == 0) {
+            return 0x00;
+        } else if (radius <= 30) {
+            return 0x01;
+        } else if (radius <= 50) {
+            return 0x02;
+        } else if (radius <= 100) {
+            return 0x03;
+        } else if (radius <= 200) {
+            return 0x04;
+        } else if (radius <= 300) {
+            return 0x05;
+        } else if (radius <= 500) {
+            return 0x06;
+        } else if (radius <= 1000) {
+            return 0x07;
+        } else if (radius <= 2000) {
+            return 0x08;
+        } else {
+            return 0xff;
+        }
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ChannelBuffer content = ChannelBuffers.dynamicBuffer();
+        Map<String, Object> attributes = command.getAttributes();
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent(command.getDeviceId(), MSG_TRACK_ON_DEMAND, content);
+            case Command.TYPE_POSITION_PERIODIC:
+                content.writeShort(((Number) attributes.get(Command.KEY_FREQUENCY)).intValue() / 10);
+                return encodeContent(command.getDeviceId(), MSG_TRACK_BY_INTERVAL, content);
+            case Command.TYPE_MOVEMENT_ALARM:
+                content.writeShort(((Number) attributes.get(Command.KEY_RADIUS)).intValue());
+                return encodeContent(command.getDeviceId(), MSG_MOVEMENT_ALARM, content);
+            case Command.TYPE_SET_TIMEZONE:
+                int offset = ((Number) attributes.get(Command.KEY_TIMEZONE)).intValue() / 60;
+                content.writeBytes(String.valueOf(offset).getBytes(Charset.defaultCharset()));
+                return encodeContent(command.getDeviceId(), MSG_TIME_ZONE, content);
+            case Command.TYPE_REBOOT_DEVICE:
+                return encodeContent(command.getDeviceId(), MSG_REBOOT_GPS, content);
+            default:
+                Log.warning(new UnsupportedOperationException(command.getType()));
+                break;
+        }
+
+        return null;
+    }
+
+}
-- 
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