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<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2019 Open Source Matters, Inc.
<https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see
LICENSE.txt
 */

namespace Joomla\CMS\Form\Filter;

use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Form\FormFilterInterface;
use Joomla\Registry\Registry;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Form Filter class for safe HTML
 *
 * @since  4.0.0
 */
class SafehtmlFilter implements FormFilterInterface
{
    /**
     * Method to filter a field value.
     *
     * @param   \SimpleXMLElement  $element  The SimpleXMLElement object
representing the `<field>` tag for the form field object.
     * @param   mixed              $value    The form field value to
validate.
     * @param   string             $group    The field name group control
value. This acts as an array container for the field.
     *                                       For example if the field has
name="foo" and the group value is set to "bar" then the
     *                                       full field name would end up
being "bar[foo]".
     * @param   ?Registry          $input    An optional Registry object
with the entire data set to validate against the entire form.
     * @param   ?Form              $form     The form object for which the
field is being tested.
     *
     * @return  mixed   The filtered value.
     *
     * @since   4.0.0
     */
    public function filter(\SimpleXMLElement $element, $value, $group =
null, Registry $input = null, Form $form = null)
    {
        return InputFilter::getInstance(
            [],
            [],
            InputFilter::ONLY_BLOCK_DEFINED_TAGS,
            InputFilter::ONLY_BLOCK_DEFINED_ATTRIBUTES
        )->clean($value, 'html');
    }
}