File indexing completed on 2024-05-12 06:02:04

 <?php
 
 // must be called POST validation
 
 /**
  * Adds rel="nofollow" to all outbound links.  This transform is
  * only attached if Attr.Nofollow is TRUE.
  */
 class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
 {
     /**
      * @type HTMLPurifier_URIParser
      */
     private $parser;
 
     public function __construct()
     {
         $this->parser = new HTMLPurifier_URIParser();
     }
 
     /**
      * @param array $attr
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return array
      */
     public function transform($attr, $config, $context)
     {
         if (!isset($attr['href'])) {
             return $attr;
         }
 
         // XXX Kind of inefficient
         $url = $this->parser->parse($attr['href']);
         $scheme = $url->getSchemeObj($config, $context);
 
         if ($scheme->browsable && !$url->isLocal($config, $context)) {
             if (isset($attr['rel'])) {
                 $rels = explode(' ', $attr['rel']);
                 if (!in_array('nofollow', $rels)) {
                     $rels[] = 'nofollow';
                 }
                 $attr['rel'] = implode(' ', $rels);
             } else {
                 $attr['rel'] = 'nofollow';
             }
         }
         return $attr;
     }
 }
 
 // vim: et sw=4 sts=4