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/*
* 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.channel.Channel;
import org.traccar.Protocol;
import org.traccar.StringProtocolEncoder;
import org.traccar.helper.Checksum;
import org.traccar.model.Command;
public class StartekProtocolEncoder extends StringProtocolEncoder {
public StartekProtocolEncoder(Protocol protocol) {
super(protocol);
}
@Override
protected String formatCommand(Command command, String format, String... keys) {
String uniqueId = getUniqueId(command.getDeviceId());
String payload = super.formatCommand(command, format, keys);
int length = uniqueId.length() + 1 + payload.length();
String sentence = "$$:" + length + "," + uniqueId + "," + payload;
return sentence + Checksum.sum(sentence) + "\r\n";
}
@Override
protected Object encodeCommand(Channel channel, Command command) {
switch (command.getType()) {
case Command.TYPE_OUTPUT_CONTROL:
return formatCommand(command, "900,%s,%s", Command.KEY_INDEX, Command.KEY_DATA);
case Command.TYPE_ENGINE_STOP:
return formatCommand(command, "900,1,1");
case Command.TYPE_ENGINE_RESUME:
return formatCommand(command, "900,1,0");
default:
return null;
}
}
}
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