File indexing completed on 2024-05-12 05:58:46

 <?php
 
 /**
  *  ocs-webserver
  *
  *  Copyright 2016 by pling GmbH.
  *
  *    This file is part of ocs-webserver.
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU Affero General Public License as
  *    published by the Free Software Foundation, either version 3 of the
  *    License, or (at your option) any later version.
  *
  *    This program is distributed in the hope that it will be useful,
  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *    GNU Affero General Public License for more details.
  *
  *    You should have received a copy of the GNU Affero General Public License
  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  * Created: 21.06.2017
  */
 class Default_Model_HtmlPurify
 {
 
     const ALLOW_NOTHING = 1;
     const ALLOW_HTML = 2;
     const ALLOW_VIDEO = 3;
     const ALLOW_URL = 4;
     const ALLOW_EMBED = 5;
 
     /**
      * @param string $dirty_html
      * @param int    $schema
      *
      * @return string
      *
      */
     public static function purify($dirty_html, $schema = self::ALLOW_NOTHING)
     {
         return self::getPurifier($schema)->purify($dirty_html);
     }
 
     /**
      * @param int $schema
      *
      * @return false|HTMLPurifier
      *
      */
     public static function getPurifier($schema = self::ALLOW_NOTHING)
     {
         include_once APPLICATION_LIB . '/HTMLPurifier.safe-includes.php';
         $config = HTMLPurifier_Config::createDefault();
 
         switch ($schema) {
             case self::ALLOW_HTML:
                 $config->set('HTML.Allowed',
                     'em,strong,br,p,b,a[href],img[src|alt],i,li,ol,ul,small,abbr[title],acronym,blockquote,caption,cite,code,del,dl, dt, sub, sup,tt,var');
                 break;
 
             case self::ALLOW_VIDEO:
                 $config->set('HTML.SafeIframe', true);
                 $config->set('URI.SafeIframeRegexp',
                     '%^(https?:)?//(www\.youtube(?:-nocookie)?\.com/embed/|player\.vimeo\.com/video/)%'); //allow YouTube and Vimeo
                 break;
 
             case self::ALLOW_EMBED:
                  $config->set('HTML.SafeIframe', true);
                  $config->set('URI.SafeIframeRegexp',
                     '%^(https?:)?//(www\.youtube(?:-nocookie)?\.com/embed/|player\.vimeo\.com/video/|w\.soundcloud\.com/player/)%'); 
                 break;
 
             case self::ALLOW_URL:
                 $config->set('HTML.Allowed', ''); // Allow Nothing
                 $config->set('URI.AllowedSchemes', array('http' => true, 'https' => true));
                 $config->set('URI.MakeAbsolute', true);
                 break;
 
             default:
                 $config->set('HTML.Allowed', ''); // Allow Nothing
         }
 
         $config->set('Cache.SerializerPath', APPLICATION_CACHE);
         //$config->set('AutoFormat.AutoParagraph', true);
         $purifier = new HTMLPurifier($config);
 
         return $purifier;
     }
 
 }