TestTaskAdditionalFieldProvider.php

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<?php
namespace TYPO3\CMS\Scheduler\Example;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use TYPO3\CMS\Scheduler\Task\AbstractTask;

class TestTaskAdditionalFieldProvider implements \TYPO3\CMS\Scheduler\AdditionalFieldProviderInterface
{
    public function getAdditionalFields(array &$taskInfo, $task, \TYPO3\CMS\Scheduler\Controller\SchedulerModuleController $parentObject)
    {
        // Initialize extra field value
        if (empty($taskInfo['email'])) {
            if ($parentObject->CMD === 'add') {
                // In case of new task and if field is empty, set default email address
                $taskInfo['email'] = $GLOBALS['BE_USER']->user['email'];
            } elseif ($parentObject->CMD === 'edit') {
                // In case of edit, and editing a test task, set to internal value if not data was submitted already
                $taskInfo['email'] = $task->email;
            } else {
                // Otherwise set an empty value, as it will not be used anyway
                $taskInfo['email'] = '';
            }
        }
        // Write the code for the field
        $fieldID = 'task_email';
        $fieldCode = '<input type="text" class="form-control" name="tx_scheduler[email]" id="' . $fieldID . '" value="' . htmlspecialchars($taskInfo['email']) . '" size="30">';
        $additionalFields = [];
        $additionalFields[$fieldID] = [
            'code' => $fieldCode,
            'label' => 'LLL:EXT:scheduler/Resources/Private/Language/locallang.xlf:label.email',
            'cshKey' => '_MOD_system_txschedulerM1',
            'cshLabel' => $fieldID
        ];
        return $additionalFields;
    }

    public function validateAdditionalFields(array &$submittedData, \TYPO3\CMS\Scheduler\Controller\SchedulerModuleController $parentObject)
    {
        $submittedData['email'] = trim($submittedData['email']);
        if (empty($submittedData['email'])) {
            $parentObject->addMessage($GLOBALS['LANG']->sL('LLL:EXT:scheduler/Resources/Private/Language/locallang.xlf:msg.noEmail'), \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
            $result = false;
        } else {
            $result = true;
        }
        return $result;
    }

    public function saveAdditionalFields(array $submittedData, \TYPO3\CMS\Scheduler\Task\AbstractTask $task)
    {
        $task->email = $submittedData['email'];
    }
}