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/*
* Copyright 2015 - 2024 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.Protocol;
import org.traccar.StringProtocolEncoder;
import org.traccar.config.Keys;
import org.traccar.helper.Checksum;
import org.traccar.helper.model.AttributeUtil;
import org.traccar.model.Command;
public class MeitrackProtocolEncoder extends StringProtocolEncoder {
public MeitrackProtocolEncoder(Protocol protocol) {
super(protocol);
}
private Object formatCommand(Command command, String content) {
String uniqueId = getUniqueId(command.getDeviceId());
int length = 1 + uniqueId.length() + 1 + content.length() + 5;
String result = String.format("@@A%02d,%s,%s*", length, uniqueId, content);
result += Checksum.sum(result) + "\r\n";
return result;
}
@Override
protected Object encodeCommand(Command command) {
boolean alternative = AttributeUtil.lookup(
getCacheManager(), Keys.PROTOCOL_ALTERNATIVE.withPrefix(getProtocolName()), command.getDeviceId());
return switch (command.getType()) {
case Command.TYPE_CUSTOM -> formatCommand(command, command.getString(Command.KEY_DATA));
case Command.TYPE_POSITION_SINGLE -> formatCommand(command, "A10");
case Command.TYPE_ENGINE_STOP -> formatCommand(command, "C01,0,12222");
case Command.TYPE_ENGINE_RESUME -> formatCommand(command, "C01,0,02222");
case Command.TYPE_ALARM_ARM -> formatCommand(command, alternative ? "B21,1" : "C01,0,22122");
case Command.TYPE_ALARM_DISARM -> formatCommand(command, alternative ? "B21,0" : "C01,0,22022");
case Command.TYPE_REQUEST_PHOTO -> {
int index = command.getInteger(Command.KEY_INDEX);
yield formatCommand(command, "D03," + (index > 0 ? index : 1) + ",camera_picture.jpg");
}
case Command.TYPE_SEND_SMS -> {
String phone = command.getString(Command.KEY_PHONE);
String message = command.getString(Command.KEY_MESSAGE);
yield formatCommand(command, "C02,0," + phone + "," + message);
}
default -> null;
};
}
}
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