SystemStatusUpdateTaskNotificationEmailField.php

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<?php
namespace TYPO3\CMS\Reports\Task;

class SystemStatusUpdateTaskNotificationEmailField implements \TYPO3\CMS\Scheduler\AdditionalFieldProviderInterface {

    protected $fields = array('notificationEmail');

    protected $fieldPrefix = 'SystemStatusUpdate';

    public function getAdditionalFields(array &$taskInfo, $task, \TYPO3\CMS\Scheduler\Controller\SchedulerModuleController $schedulerModule) {
        $fields = array('notificationEmail' => 'textarea');
        if ($schedulerModule->CMD == 'edit') {
            $taskInfo[$this->fieldPrefix . 'NotificationEmail'] = $task->getNotificationEmail();
        }
            // build html for additional email field
        $fieldName = $this->getFullFieldName('notificationEmail');
        $fieldId = 'task_' . $fieldName;
        $fieldHtml = '<textarea ' . 'rows="5" cols="50" name="tx_scheduler[' . $fieldName . ']" ' . 'id="' . $fieldId . '" ' . '>' . htmlspecialchars($taskInfo[$fieldName]) . '</textarea>';

        $additionalFields = array();
        $additionalFields[$fieldId] = array(
            'code' => $fieldHtml,
            'label' => 'LLL:EXT:reports/reports/locallang.xlf:status_updateTaskField_notificationEmails',
            'cshKey' => '',
            'cshLabel' => $fieldId
        );

        return $additionalFields;
    }

    public function validateAdditionalFields(array &$submittedData, \TYPO3\CMS\Scheduler\Controller\SchedulerModuleController $schedulerModule) {
        $validInput = TRUE;
        $notificationEmails = \TYPO3\CMS\Core\Utility\GeneralUtility::trimExplode(LF, $submittedData[$this->fieldPrefix . 'NotificationEmail'], TRUE);
        foreach ($notificationEmails as $notificationEmail) {
            if (!\TYPO3\CMS\Core\Utility\GeneralUtility::validEmail($notificationEmail)) {
                $validInput = FALSE;
                break;
            }
        }
        if (empty($submittedData[$this->fieldPrefix . 'NotificationEmail']) || !$validInput) {
            $schedulerModule->addMessage($GLOBALS['LANG']->sL('LLL:EXT:reports/reports/locallang.xlf:status_updateTaskField_notificationEmails_invalid'), \TYPO3\CMS\Core\Messaging\FlashMessage::ERROR);
            $validInput = FALSE;
        }
        return $validInput;
    }

    public function saveAdditionalFields(array $submittedData, \TYPO3\CMS\Scheduler\Task\AbstractTask $task) {
        if (!$task instanceof \TYPO3\CMS\Reports\Task\SystemStatusUpdateTask) {
            throw new \InvalidArgumentException('Expected a task of type TYPO3\\CMS\\Reports\\Task\\SystemStatusUpdateTask, but got ' . get_class($task), 1295012802);
        }
        $task->setNotificationEmail($submittedData[$this->fieldPrefix . 'NotificationEmail']);
    }

    protected function getFullFieldName($fieldName) {
        return $this->fieldPrefix . ucfirst($fieldName);
    }

}