1 files changed, 73 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
new file mode 100644
index 000000000..350fdf0ab
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * 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 java.util.TimeZone;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class CityeasyProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(int type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte('S');
+        buf.writeByte('S');
+        buf.writeShort(2 + 2 + 2 + content.readableBytes() + 4 + 2 + 2);
+        buf.writeShort(type);
+        buf.writeBytes(content);
+        buf.writeInt(0x0B);
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_KERMIT, buf.nioBuffer()));
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ByteBuf content = Unpooled.buffer();
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_REQUEST, content);
+            case Command.TYPE_POSITION_PERIODIC:
+                content.writeShort(command.getInteger(Command.KEY_FREQUENCY));
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
+            case Command.TYPE_POSITION_STOP:
+                content.writeShort(0);
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
+            case Command.TYPE_SET_TIMEZONE:
+                int timezone = TimeZone.getTimeZone(command.getString(Command.KEY_TIMEZONE)).getRawOffset() / 60000;
+                if (timezone < 0) {
+                    content.writeByte(1);
+                } else {
+                    content.writeByte(0);
+                }
+                content.writeShort(Math.abs(timezone));
+                return encodeContent(CityeasyProtocolDecoder.MSG_TIMEZONE, content);
+            default:
+                return null;
+        }
+    }
+
+}