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/*
* Copyright 2023 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.helper.Checksum;
import org.traccar.model.Command;
import org.traccar.model.Device;
import java.nio.charset.StandardCharsets;
public class Minifinder2ProtocolEncoder extends BaseProtocolEncoder {
public Minifinder2ProtocolEncoder(Protocol protocol) {
super(protocol);
}
private ByteBuf encodeContent(ByteBuf content) {
ByteBuf buf = Unpooled.buffer();
buf.writeByte(0xAB); // header
buf.writeByte(0x00); // properties
buf.writeShortLE(content.readableBytes());
buf.writeShortLE(Checksum.crc16(Checksum.CRC16_XMODEM, content.nioBuffer()));
buf.writeShortLE(1); // index
buf.writeBytes(content);
return buf;
}
@Override
protected Object encodeCommand(Command command) {
Device device = getCacheManager().getObject(Device.class, command.getDeviceId());
if ("Nano".equalsIgnoreCase(device.getModel())) {
ByteBuf content = Unpooled.buffer();
if (command.getType().equals(Command.TYPE_FIRMWARE_UPDATE)) {
String url = command.getString(Command.KEY_DATA);
content.writeByte(1 + url.length());
content.writeByte(0x30); // type
content.writeCharSequence(url, StandardCharsets.US_ASCII);
return encodeContent(content);
}
}
return null;
}
}
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