Merge commands implementation (fix #7)

1 files changed, 64 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/Gt06ProtocolEncoder.java b/src/org/traccar/protocol/Gt06ProtocolEncoder.java
new file mode 100644
index 000000000..b8177d60b
--- /dev/null
+++ b/src/org/traccar/protocol/Gt06ProtocolEncoder.java
@@ -0,0 +1,64 @@
+/*
+ * 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.Crc;
+import org.traccar.model.Command;
+
+public class Gt06ProtocolEncoder extends BaseProtocolEncoder {
+    
+    @Override
+    protected Object encodeCommand(Command command) {
+        
+        String content = "";
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                content = "DYD#";
+                break;
+            case Command.TYPE_ENGINE_RESUME:
+                content = "HFYD#";
+                break;
+        }
+        
+        int serverFlagBit = 0x00;
+        int commandLength = serverFlagBit + content.length();
+        int packetLength =  0x80 + content.length() + 2 + 2;
+
+        ChannelBuffer response = ChannelBuffers.directBuffer(10);
+        response.writeBytes(new byte[]{0x78, 0x78}); // Start Bit
+        response.writeByte(packetLength); // Packet Length
+        response.writeByte(0x80); // Protocol Number
+
+        // Information Content
+        response.writeByte(commandLength); // Length of command
+        response.writeByte(serverFlagBit); // Server Flag Bit
+        response.writeBytes(content.getBytes()); // Command Content
+        response.writeBytes(new byte[]{0x00, 0x02}); // Language
+
+        response.writeShort(1); // Information Serial Number
+
+        int crc = Crc.crc16Ccitt(response.toByteBuffer(2, response.writerIndex()));
+        response.writeShort(crc); // Error Check
+
+        response.writeBytes(new byte[] {0x0D, 0x0A}); // Stop Bit
+
+        return response;
+    }
+    
+}