Implement KHD protocol commands

1 files changed, 60 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/KhdProtocolEncoder.java b/src/org/traccar/protocol/KhdProtocolEncoder.java
new file mode 100644
index 000000000..20d8eb40a
--- /dev/null
+++ b/src/org/traccar/protocol/KhdProtocolEncoder.java
@@ -0,0 +1,60 @@
+/*
+ * 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 KhdProtocolEncoder extends BaseProtocolEncoder {
+
+    private static final int MSG_CUT_OIL = 0x39;
+    private static final int MSG_RESUME_OIL = 0x38;
+
+    private ChannelBuffer encodeCommand(int command) {
+
+        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
+
+        buf.writeByte(0x29);
+        buf.writeByte(0x29);
+
+        buf.writeByte(command);
+        buf.writeShort(6); // size
+
+        buf.writeInt(0); // terminal id
+
+        buf.writeByte(Crc.xorChecksum(buf.toByteBuffer()));
+        buf.writeByte(0x0D); // ending
+
+        return buf;
+    }
+    
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return encodeCommand(MSG_CUT_OIL);
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeCommand(MSG_RESUME_OIL);
+        }
+
+        return null;
+    }
+    
+}