class.ilMailErrorFormatter.php

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<?php

declare(strict_types=1);

class ilMailErrorFormatter
{
    public function __construct(protected ilLanguage $lng)
    {
    }

    public function format(array $errors): string
    {
        if ([] === $errors) {
            return '';
        }

        $errorsToDisplay = [];
        foreach ($errors as $error) {
            $translation = $this->lng->txt($error->getLanguageVariable());
            if ($translation === '-' . $error->getLanguageVariable() . '-') {
                $translation = $error->getLanguageVariable();
            }

            if (
                $translation === $error->getLanguageVariable() ||
                [] === $error->getPlaceHolderValues()
            ) {
                $errorsToDisplay[] = $translation;
            } else {
                $escapedPlaceholderValues = array_map(static function (string $address): string {
                    return ilLegacyFormElementsUtil::prepareFormOutput($address);
                }, $error->getPlaceHolderValues());

                array_unshift($escapedPlaceholderValues, $translation);
                $errorsToDisplay[] = sprintf(...$escapedPlaceholderValues);
            }
        }

        $tpl = new ilTemplate(
            'tpl.mail_new_submission_errors.html',
            true,
            true,
            'components/ILIAS/Mail'
        );
        if (1 === count($errorsToDisplay)) {
            $tpl->setCurrentBlock('single_error');
            $tpl->setVariable('SINGLE_ERROR', current($errorsToDisplay));
        } else {
            $firstError = array_shift($errorsToDisplay);

            foreach ($errorsToDisplay as $error) {
                $tpl->setCurrentBlock('error_loop');
                $tpl->setVariable('ERROR', $error);
                $tpl->parseCurrentBlock();
            }

            $tpl->setCurrentBlock('multiple_errors');
            $tpl->setVariable('FIRST_ERROR', $firstError);
        }
        $tpl->parseCurrentBlock();

        return $tpl->get();
    }
}