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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_contact
 *
 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All
rights reserved.
 * @license     GNU General Public License version 2 or later; see
LICENSE.txt
 */

defined('_JEXEC') or die;

use Joomla\Registry\Registry;
use Joomla\String\StringHelper;

/**
 * JFormRule for com_contact to make sure the subject contains no banned
word.
 *
 * @since  1.6
 */
class JFormRuleContactEmailSubject extends JFormRule
{
	/**
	 * Method to test for a banned subject
	 *
	 * @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   JForm             $form     The form object for which the
field is being tested.
	 *
	 * @return  boolean  True if the value is valid, false otherwise
	 */
	public function test(SimpleXMLElement $element, $value, $group = null,
Registry $input = null, JForm $form = null)
	{
		$params = JComponentHelper::getParams('com_contact');
		$banned = $params->get('banned_subject');

		if ($banned)
		{
			foreach (explode(';', $banned) as $item)
			{
				if ($item != '' && StringHelper::stristr($value,
$item) !== false)
				{
					return false;
				}
			}
		}

		return true;
	}
}