class.ilDclTextInputGUI.php

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<?php

declare(strict_types=1);

class ilDclTextInputGUI extends ilTextInputGUI
{
    public function setValueByArray(array $a_values): void
    {
        parent::setValueByArray($a_values);
        foreach ($this->getSubItems() as $item) {
            $item->setValueByArray($a_values);
        }
    }

    public function checkInput(): bool
    {
        // validate regex
        $has_postvar = $this->http->wrapper()->post()->has($this->getPostVar());
        if ($this->getPostVar() == 'prop_' . ilDclBaseFieldModel::PROP_REGEX && $has_postvar) {
            $regex = $this->http->wrapper()->post()->retrieve(
                $this->getPostVar(),
                $this->refinery->kindlyTo()->string()
            );
            if (substr($regex, 0, 1) != "/") {
                $regex = "/" . $regex;
            }
            if (substr($regex, -1) != "/" || $regex == "/") {
                $regex .= "/";
            }

            try {
                preg_match($regex, '');
            } catch (Exception) {
                global $DIC;
                $lng = $DIC['lng'];
                $this->setAlert($lng->txt('msg_input_does_not_match_regexp'));

                return false;
            }
        }

        return parent::checkInput();
    }
}