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/home/jambtst2015/public_html/ida.com.ng/libraries/src/Form/Rule/UrlRule.php

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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2011 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\Form\Form;
use Joomla\CMS\Form\FormRule;
use Joomla\CMS\Language\Text;
use Joomla\Registry\Registry;
use Joomla\String\StringHelper;
use Joomla\Uri\UriHelper;

/**
 * Form Rule class for the Joomla Platform.
 *
 * @since  1.7.0
 */
class UrlRule extends FormRule
{
	/**
	 * Method to test an external or internal url for all valid parts.
	 *
	 * @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   1.7.0
	 * @link    https://www.w3.org/Addressing/URL/url-spec.txt
	 * @see	    \Joomla\String\StringHelper
	 */
	public function test(\SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
	{
		// 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;
		}

$urlParts = UriHelper::parse_url($value);

// See https://www.w3.org/Addressing/URL/url-spec.txt
		// Use the full list or optionally specify a list of permitted schemes.
		if ($element['schemes'] == '')
		{
			$scheme = array('http', 'https', 'ftp', 'ftps', 'gopher', 'mailto', 'news', 'prospero', 'telnet', 'rlogin', 'sftp', 'tn3270', 'wais',
				'mid', 'cid', 'nntp', 'tel', 'urn', 'ldap', 'file', 'fax', 'modem', 'git');
		}
		else
		{
			$scheme = explode(',', $element['schemes']);
		}

/*
		 * Note that parse_url() does not always parse accurately without a scheme,
		 * but at least the path should be set always. Note also that parse_url()
		 * returns False for seriously malformed URLs instead of an associative array.
		 * @link https://www.php.net/manual/en/function.parse-url.php
		 */
		if ($urlParts === false || !\array_key_exists('scheme', $urlParts))
		{
			/*
			 * The function parse_url() returned false (seriously malformed URL) or no scheme
			 * was found and the relative option is not set: in both cases the field is not valid.
			 */
			if ($urlParts === false || !$element['relative'])
			{
				$element->addAttribute('message', Text::sprintf('JLIB_FORM_VALIDATE_FIELD_URL_SCHEMA_MISSING', $value, implode(', ', $scheme)));

return false;
			}

// The best we can do for the rest is make sure that the path exists and is valid UTF-8.
			if (!\array_key_exists('path', $urlParts) || !StringHelper::valid((string) $urlParts['path']))
			{
				return false;
			}

// The internal URL seems to be good.
			return true;
		}

// Scheme found, check all parts found.
		$urlScheme = (string) $urlParts['scheme'];
		$urlScheme = strtolower($urlScheme);

if (\in_array($urlScheme, $scheme) == false)
		{
			return false;
		}

// For some schemes here must be two slashes.
		$scheme = array('http', 'https', 'ftp', 'ftps', 'gopher', 'wais', 'prospero', 'sftp', 'telnet', 'git');

if (\in_array($urlScheme, $scheme) && substr($value, \strlen($urlScheme), 3) !== '://')
		{
			return false;
		}

// The best we can do for the rest is make sure that the strings are valid UTF-8
		// and the port is an integer.
		if (\array_key_exists('host', $urlParts) && !StringHelper::valid((string) $urlParts['host']))
		{
			return false;
		}

if (\array_key_exists('port', $urlParts) && !\is_int((int) $urlParts['port']))
		{
			return false;
		}

if (\array_key_exists('path', $urlParts) && !StringHelper::valid((string) $urlParts['path']))
		{
			return false;
		}

return true;
	}
}

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