Implement Teltonika commands (fix #1948)

1 files changed, 62 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/TeltonikaProtocolEncoder.java b/src/org/traccar/protocol/TeltonikaProtocolEncoder.java
new file mode 100644
index 000000000..d91f7f7bf
--- /dev/null
+++ b/src/org/traccar/protocol/TeltonikaProtocolEncoder.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2016 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 java.nio.charset.StandardCharsets;
+
+public class TeltonikaProtocolEncoder extends BaseProtocolEncoder {
+
+    private ChannelBuffer encodeContent(String content) {
+
+        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
+
+        buf.writeInt(0);
+        buf.writeInt(content.length() + 10);
+        buf.writeByte(TeltonikaProtocolDecoder.CODEC_12);
+        buf.writeByte(1); // quantity
+        buf.writeByte(5); // type
+        buf.writeInt(content.length() + 2);
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+        buf.writeByte(1); // quantity
+        buf.writeInt(Checksum.crc16(Checksum.CRC16_IBM, buf.toByteBuffer(8, buf.writerIndex() - 8)));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeContent((String) command.getAttributes().get(Command.KEY_DATA));
+            default:
+                Log.warning(new UnsupportedOperationException(command.getType()));
+                break;
+        }
+
+        return null;
+    }
+
+}