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

---
 .../java/org/traccar/protocol/TopinProtocol.java   |  6 +-
 .../org/traccar/protocol/TopinProtocolDecoder.java |  1 +
 .../org/traccar/protocol/TopinProtocolEncoder.java | 66 ++++++++++++++++++++++
 .../traccar/protocol/TopinProtocolEncoderTest.java | 24 ++++++++
 4 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/traccar/protocol/TopinProtocolEncoder.java
 create mode 100644 src/test/java/org/traccar/protocol/TopinProtocolEncoderTest.java

diff --git a/src/main/java/org/traccar/protocol/TopinProtocol.java b/src/main/java/org/traccar/protocol/TopinProtocol.java
index 844dd7518..d28afbf94 100644
--- a/src/main/java/org/traccar/protocol/TopinProtocol.java
+++ b/src/main/java/org/traccar/protocol/TopinProtocol.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ * Copyright 2019 - 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.
@@ -18,13 +18,17 @@ package org.traccar.protocol;
 import org.traccar.BaseProtocol;
 import org.traccar.PipelineBuilder;
 import org.traccar.TrackerServer;
+import org.traccar.model.Command;
 
 public class TopinProtocol extends BaseProtocol {
 
     public TopinProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_SOS_NUMBER);
         addServer(new TrackerServer(false, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TopinProtocolEncoder(TopinProtocol.this));
                 pipeline.addLast(new TopinProtocolDecoder(TopinProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java b/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java
index 7fd939caa..267bce562 100644
--- a/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/TopinProtocolDecoder.java
@@ -50,6 +50,7 @@ public class TopinProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_STATUS = 0x13;
     public static final int MSG_WIFI_OFFLINE = 0x17;
     public static final int MSG_TIME_UPDATE = 0x30;
+    public static final int MSG_SOS_NUMBER = 0x41;
     public static final int MSG_WIFI = 0x69;
     public static final int MSG_VIBRATION_ON = 0x92;
     public static final int MSG_VIBRATION_OFF = 0x93;
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;
+        }
+    }
+
+}
diff --git a/src/test/java/org/traccar/protocol/TopinProtocolEncoderTest.java b/src/test/java/org/traccar/protocol/TopinProtocolEncoderTest.java
new file mode 100644
index 000000000..d3ff13941
--- /dev/null
+++ b/src/test/java/org/traccar/protocol/TopinProtocolEncoderTest.java
@@ -0,0 +1,24 @@
+package org.traccar.protocol;
+
+import org.junit.Test;
+import org.traccar.ProtocolTest;
+import org.traccar.model.Command;
+
+public class TopinProtocolEncoderTest extends ProtocolTest {
+
+    @Test
+    public void testEncode() throws Exception {
+
+        var encoder = new TopinProtocolEncoder(null);
+
+        Command command = new Command();
+        command.setDeviceId(1);
+        command.setType(Command.TYPE_SOS_NUMBER);
+        command.set(Command.KEY_INDEX, 1);
+        command.set(Command.KEY_PHONE, "13533333333");
+
+        verifyCommand(encoder, command, binary("78780C4131333533333333333333330D0A"));
+
+    }
+
+}
-- 
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