From 33f20c440ee2a132c222781c4197dff10ecc6b3c Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 13 Nov 2021 10:26:56 -0800
Subject: Add Topin protocol encoder

---
 .../org/traccar/protocol/TopinProtocolEncoder.java | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/TopinProtocolEncoder.java

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

diff --git a/src/main/java/org/traccar/protocol/TopinProtocolEncoder.java b/src/main/java/org/traccar/protocol/TopinProtocolEncoder.java
new file mode 100644
index 000000000..77f80b9d4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TopinProtocolEncoder.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2021 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.Protocol;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class TopinProtocolEncoder extends BaseProtocolEncoder {
+
+    public TopinProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private ByteBuf encodeContent(int type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte(0x78);
+        buf.writeByte(0x78);
+
+        buf.writeByte(1 + content.readableBytes()); // message length
+
+        buf.writeByte(type);
+
+        buf.writeBytes(content);
+        content.release();
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ByteBuf content = Unpooled.buffer();
+
+        switch (command.getType()) {
+            case Command.TYPE_SOS_NUMBER:
+                content.writeCharSequence(command.getString(Command.KEY_PHONE), StandardCharsets.US_ASCII);
+                return encodeContent(TopinProtocolDecoder.MSG_SOS_NUMBER, content);
+            default:
+                return null;
+        }
+    }
+
+}
-- 
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