1 files changed, 78 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
new file mode 100644
index 000000000..05560229f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2015 - 2018 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.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class Gt06ProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(long deviceId, String content) {
+
+        boolean language = Context.getIdentityManager().lookupAttributeBoolean(deviceId, "gt06.language", false, true);
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte(0x78);
+        buf.writeByte(0x78);
+
+        buf.writeByte(1 + 1 + 4 + content.length() + 2 + 2 + (language ? 2 : 0)); // message length
+
+        buf.writeByte(0x80); // message type
+
+        buf.writeByte(4 + content.length()); // command length
+        buf.writeInt(0);
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII)); // command
+
+        if (language) {
+            buf.writeShort(2); // english language
+        }
+
+        buf.writeShort(0); // message index
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_X25, buf.nioBuffer(2, buf.writerIndex() - 2)));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        boolean alternative = Context.getIdentityManager().lookupAttributeBoolean(
+                command.getDeviceId(), "gt06.alternative", false, true);
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return encodeContent(command.getDeviceId(), alternative ? "DYD,123456#" : "Relay,1#");
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeContent(command.getDeviceId(), alternative ? "HFYD,123456#" : "Relay,0#");
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command.getDeviceId(), command.getString(Command.KEY_DATA));
+            default:
+                return null;
+        }
+    }
+
+}