<?php
/**
 * patForms Rule URL
 *
 * $Id$
 *
 * @package		patForms
 * @subpackage	Rules
 */

/**
 * patForms Rule URL
 *
 * @package		patForms
 * @subpackage	Rules
 * @author		Stephan Schmidt <schst@php-tools.net>
 * @license		LGPL, see license.txt for details
 * @link		http://www.php-tools.net
 */
class patForms_Rule_URL extends patForms_Rule
{
   /**
	* name of the rule
	*
	* @abstract
	* @access	private
	*/
	var	$ruleName = 'URL';

   /**
    * Initialize validation codes using gettext
    *
    * Overwrite this function to add element's error codes
    * 
    * @access   protected
    * @return   bool    $success    Always returns true.
    * @see      $attributeDefaults
    */
    function loadValidatiorErrorCodes()
    {
        $this->validatorErrorCodes  = array(
            1   =>  patI18n::dgettext('patForms', 'The URL has an invalid syntax.'),
        );
        return true;
    }


   /**
	* method called by patForms or any patForms_Element to validate the
	* element or the form.
	*
	* @access	public
	* @param	object patForms	form object
	*/
	function applyRule(&$element, $type = PATFORMS_RULE_BEFORE_VALIDATION)
	{
		$value = $element->getValue(false);
		if (empty($value)) {
			return true;
		}
		
		// prepend server name for local URLs
		if ('/' == $value[0]) {
		    WBClass::load('WBString');
		    $value    =   WBString::replaceSuperPlaceholders('http://[[SERVER]]' . $value);
		}
		
		$ereg = "(http|ftp|https)://[-A-Za-z0-9._]+(\/([A-Za-z0-9\-\_\.\!\~\*\'\(\)\%\?]+))*/?";
		if (!eregi($ereg, $value)) {
			$this->addValidationError(1);
			return false;
		}
		return true;
	}
}
?>