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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Form\Rule;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Form\FormRule;
use Joomla\CMS\Language\Text;
use Joomla\Registry\Registry;

/**
 * Form Rule class for the Joomla Platform.
 *
 * @since  3.1.2
 */
class PasswordRule extends FormRule
{
	/**
	 * Method to test if two values are not equal. To use this rule, the form
	 * XML needs a validate attribute of equals and a field attribute
	 * that is equal to the field to test against.
	 *
	 * @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  boolean  True if the value is valid, false otherwise.
	 *
	 * @since   3.1.2
	 * @throws  \InvalidArgumentException
	 * @throws  \UnexpectedValueException
	 */
	public function test(\SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
	{
		$meter            = isset($element['strengthmeter']) ? ' meter="0"' : '1';
		$threshold        = isset($element['threshold']) ? (int) $element['threshold'] : 66;
		$minimumLength    = isset($element['minimum_length']) ? (int) $element['minimum_length'] : 12;
		$minimumIntegers  = isset($element['minimum_integers']) ? (int) $element['minimum_integers'] : 0;
		$minimumSymbols   = isset($element['minimum_symbols']) ? (int) $element['minimum_symbols'] : 0;
		$minimumUppercase = isset($element['minimum_uppercase']) ? (int) $element['minimum_uppercase'] : 0;
		$minimumLowercase = isset($element['minimum_lowercase']) ? (int) $element['minimum_lowercase'] : 0;

// In the installer we don't have any access to the
		// database yet so use the hard coded default settings
		if (!Factory::getApplication()->isClient('installation'))
		{
			// If we have parameters from com_users, use those instead.
			// Some of these may be empty for legacy reasons.
			$params = ComponentHelper::getParams('com_users');

if (!empty($params))
			{
				$minimumLengthp    = $params->get('minimum_length', 12);
				$minimumIntegersp  = $params->get('minimum_integers', 0);
				$minimumSymbolsp   = $params->get('minimum_symbols', 0);
				$minimumUppercasep = $params->get('minimum_uppercase', 0);
				$minimumLowercasep = $params->get('minimum_lowercase', 0);
				$meterp            = $params->get('meter');
				$thresholdp        = $params->get('threshold', 66);

empty($minimumLengthp) ? : $minimumLength = (int) $minimumLengthp;
				empty($minimumIntegersp) ? : $minimumIntegers = (int) $minimumIntegersp;
				empty($minimumSymbolsp) ? : $minimumSymbols = (int) $minimumSymbolsp;
				empty($minimumUppercasep) ? : $minimumUppercase = (int) $minimumUppercasep;
				empty($minimumLowercasep) ? : $minimumLowercase = (int) $minimumLowercasep;
				empty($meterp) ? : $meter = $meterp;
				empty($thresholdp) ? : $threshold = $thresholdp;
			}
		}

// If the field is empty and not required, the field is valid.
		$required = ((string) $element['required'] === 'true' || (string) $element['required'] === 'required');

if (!$required && empty($value))
		{
			return true;
		}

$valueLength = \strlen($value);

// We set a maximum length to prevent abuse since it is unfiltered.
		if ($valueLength > 4096)
		{
			Factory::getApplication()->enqueueMessage(Text::_('JFIELD_PASSWORD_TOO_LONG'), 'error');
		}

// We don't allow white space inside passwords
		$valueTrim = trim($value);

// Set a variable to check if any errors are made in password
		$validPassword = true;

if (\strlen($valueTrim) !== $valueLength)
		{
			Factory::getApplication()->enqueueMessage(
				Text::_('JFIELD_PASSWORD_SPACES_IN_PASSWORD'),
				'error'
			);

$validPassword = false;
		}

// Minimum number of integers required
		if (!empty($minimumIntegers))
		{
			$nInts = preg_match_all('/[0-9]/', $value, $imatch);

if ($nInts < $minimumIntegers)
			{
				Factory::getApplication()->enqueueMessage(
					Text::plural('JFIELD_PASSWORD_NOT_ENOUGH_INTEGERS_N', $minimumIntegers),
					'error'
				);