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/*
* Copyright 2020 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;
public class PstProtocolEncoder extends BaseProtocolEncoder {
public PstProtocolEncoder(Protocol protocol) {
super(protocol);
}
private ByteBuf encodeContent(long deviceId, int type, int data1, int data2) {
ByteBuf buf = Unpooled.buffer();
buf.writeInt((int) Long.parseLong(getUniqueId(deviceId)));
buf.writeByte(0x06); // version
buf.writeInt(1); // index
buf.writeByte(PstProtocolDecoder.MSG_COMMAND);
buf.writeShort(type);
buf.writeShort(data1);
buf.writeShort(data2);
buf.writeShort(Checksum.crc16(Checksum.CRC16_XMODEM, buf.nioBuffer()));
return buf;
}
@Override
protected Object encodeCommand(Command command) {
switch (command.getType()) {
case Command.TYPE_ENGINE_STOP:
return encodeContent(command.getDeviceId(), 0x0002, 0xffff, 0xffff);
case Command.TYPE_ENGINE_RESUME:
return encodeContent(command.getDeviceId(), 0x0001, 0xffff, 0xffff);
default:
return null;
}
}
}
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