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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\Registry\Registry;

/**
 * Form Rule class for the Joomla Platform
 *
 * @since  1.7.0
 */
class TelRule extends FormRule
{
	/**
	 * Method to test the url for a 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
	 */
	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;
		}

/*
		 * @link http://www.nanpa.com/
		 * @link http://tools.ietf.org/html/rfc4933
		 * @link http://www.itu.int/rec/T-REC-E.164/en
		 *
		 * Regex by Steve Levithan
		 * @link http://blog.stevenlevithan.com/archives/validate-phone-number
		 * @note that valid ITU-T and EPP must begin with +.
		 */
		$regexarray = array(
			'NANP' => '/^(?:\+?1[-. ]?)?$?([2-9][0-8][0-9])$?[-. ]?([2-9][0-9]{2})[-. ]?([0-9]{4})$/',
			'ITU-T' => '/^\+(?:[0-9] ?){6,14}[0-9]$/',
			'EPP' => '/^\+[0-9]{1,3}\.[0-9]{4,14}(?:x.+)?$/',
		);

if (isset($element['plan']))
		{
			$plan = (string) $element['plan'];

if ($plan === 'northamerica' || $plan === 'us')
			{
				$plan = 'NANP';
			}
			elseif ($plan === 'International' || $plan === 'int' || $plan === 'missdn' || !$plan)
			{
				$plan = 'ITU-T';
			}
			elseif ($plan === 'IETF')
			{
				$plan = 'EPP';
			}

$regex = $regexarray[$plan];

// Test the value against the regular expression.
			if (preg_match($regex, $value) == false)
			{
				return false;
			}
		}
		else
		{
			/*
			 * If the rule is set but no plan is selected just check that there are between
			 * 7 and 15 digits inclusive and no illegal characters (but common number separators
			 * are allowed).
			 */
			$cleanvalue = preg_replace('/[+. \-(\)]/', '', $value);
			$regex = '/^[0-9]{7,15}?$/';

if (preg_match($regex, $cleanvalue) == true)
			{
				return true;
			}
			else
			{
				return false;
			}
		}

return true;
	}
}