From efb64c30835eccf1e532ea7d7618d2d40ce7b761 Mon Sep 17 00:00:00 2001
From: Edward Valley <ed.valley@yandex.com>
Date: Tue, 2 Jul 2019 23:48:54 -0400
Subject: Implement basic Laipac protocol encoder

---
 .../java/org/traccar/protocol/LaipacProtocol.java  |  8 +++
 .../traccar/protocol/LaipacProtocolEncoder.java    | 71 ++++++++++++++++++++++
 2 files changed, 79 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java

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

diff --git a/src/main/java/org/traccar/protocol/LaipacProtocol.java b/src/main/java/org/traccar/protocol/LaipacProtocol.java
index 923b08a16..601e652c4 100644
--- a/src/main/java/org/traccar/protocol/LaipacProtocol.java
+++ b/src/main/java/org/traccar/protocol/LaipacProtocol.java
@@ -18,6 +18,7 @@ package org.traccar.protocol;
 import io.netty.handler.codec.LineBasedFrameDecoder;
 import io.netty.handler.codec.string.StringDecoder;
 import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.model.Command;
 import org.traccar.BaseProtocol;
 import org.traccar.PipelineBuilder;
 import org.traccar.TrackerServer;
@@ -25,12 +26,19 @@ import org.traccar.TrackerServer;
 public class LaipacProtocol extends BaseProtocol {
 
     public LaipacProtocol() {
+
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_REBOOT_DEVICE);
+
         addServer(new TrackerServer(false, getName()) {
             @Override
             protected void addProtocolHandlers(PipelineBuilder pipeline) {
                 pipeline.addLast(new LineBasedFrameDecoder(1024));
                 pipeline.addLast(new StringEncoder());
                 pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new LaipacProtocolEncoder(LaipacProtocol.this));
                 pipeline.addLast(new LaipacProtocolDecoder(LaipacProtocol.this));
             }
         });
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
new file mode 100644
index 000000000..090203806
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2015 - 2019 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 org.traccar.Context;
+import org.traccar.Protocol;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+import org.traccar.helper.Checksum;
+
+public class LaipacProtocolEncoder extends StringProtocolEncoder {
+
+    private final Protocol protocol;
+    private final String defaultDevicePassword;
+
+    public LaipacProtocolEncoder(Protocol protocol) {
+        this.protocol = protocol;
+        defaultDevicePassword = Context.getConfig().getString(
+            getProtocolName() + ".defaultPassword", "00000000");
+    }
+
+    protected String getProtocolName() {
+        return protocol.getName();
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, defaultDevicePassword);
+
+        String cmd = "";
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                cmd = formatCommand(command, "${%s}",
+                    Command.KEY_DATA);
+                break;
+            case Command.TYPE_POSITION_SINGLE:
+                cmd = formatCommand(command, "$AVREQ,{%s},1",
+                    Command.KEY_DEVICE_PASSWORD);
+                break;
+            case Command.TYPE_REBOOT_DEVICE:
+                cmd = formatCommand(command, "$AVRESET,{%s},{%s}",
+                    Command.KEY_UNIQUE_ID, Command.KEY_DEVICE_PASSWORD);
+                break;
+            default:
+                break;
+        }
+
+        if (cmd.length() > 0) {
+            cmd += Checksum.nmea(cmd) + "\r\n";
+            return cmd;
+        }
+
+        return null;
+    }
+
+}
-- 
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