TYPO3 powermail DataProcessor: Convert checkbox positions to there decimal represenation

ConvertApplicationAreaValuesToBinaryDataProcessor.php

<?php
namespace HenrikZiegenhain\MyExt\DataProcessor;

/***************************************************************
 *  Copyright notice
 *
 *  (c) 2018 Henrik Ziegenhain <henrik@ziegenhain.me>
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *
 *  This script is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/

use In2code\Powermail\DataProcessor\AbstractDataProcessor;
use In2code\Powermail\Domain\Model\Mail;
use TYPO3\CMS\Core\TypoScript\Parser\TypoScriptParser;
use TYPO3\CMS\Extbase\Utility\DebuggerUtility;

/**
 * Class ConvertApplicationAreaValuesToBinary
 * @package HenrikZiegenhain\MyExt\DataProcessor
 */
class ConvertApplicationAreaValuesToBinaryDataProcessor extends AbstractDataProcessor
{
    /**
     * @var Mail
     */
    protected $mail;

    /**
     * Convert values
     */
    public function convertApplicationAreaValuesToBinaryDataProcessor()
    {
        // Settings und Konfigurationen
        $settings = $this->getSettings();
        $configuration = $this->getConfiguration();

        // Die eigentliche uid des PowerMail-Formulars
        $powerMailFormUid = $settings['main']['form'];

        // Die spezielle Konfiguration für dieses Formular, falls vorhanden
        $mailformConfig = $configuration[$powerMailFormUid];

        // Wenn keine Konfiguration vorhanden, dann Abbruch!
        if ($mailformConfig['active'] !== '1') return;

        // Zugriff auf Formular-Daten
        $checkboxValues = $this->getMail()->getAnswersByFieldMarker()['mycheckboxes']->getValue();
        $checkboxIntValue = 0;
        foreach ($checkboxValues as $checkboxValue) {
            $checkboxIntValue += (int)$checkboxValue;
        }
        $this->getMail()->getAnswersByFieldMarker()['mycheckboxes']->setValue($checkboxIntValue);

        return true;
    }
}

powermail.ts

plugin.tx_powermail.settings.setup {
    dataProcessors {
        30 {
            class = HenrikZiegenhain\MyExt\DataProcessor\ConvertApplicationAreaValuesToBinaryDataProcessor
            config {
                # this key represents the FORM UID, where to activate the DataProcessor
                8 {
                    active = 1
                }
            }
        }
    }
}