class.ilHtmlPurifierAbstractLibWrapper.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'libs/composer/vendor/autoload.php';
require_once 'Services/Html/interfaces/interface.ilHtmlPurifierInterface.php';

abstract class ilHtmlPurifierAbstractLibWrapper implements ilHtmlPurifierInterface
{
    
    protected $oPurifier = null;
    
    public function __construct()
    {
        $this->setPurifier(
            new HTMLPurifier($this->getPurifierConfigInstance())
        );
    }
    
    final public function purify($a_html, $a_config = null)
    {
        return $this->oPurifier->purify($a_html, $a_config);
    }
    
    final public function purifyArray(array $a_array_of_html, $a_config = null)
    {
        return $this->oPurifier->purifyArray($a_array_of_html, $a_config);
    }
    
    abstract protected function getPurifierConfigInstance();
    
    protected function setPurifier(HTMLPurifier $oPurifier)
    {
        $this->oPurifier = $oPurifier;
        return $this;
    }
    
    protected function getPurifier()
    {
        return $this->oPurifier;
    }
    
    final public static function _getCacheDirectory()
    {
        if (!file_exists(ilUtil::getDataDir() . '/HTMLPurifier') ||
           !is_dir(ilUtil::getDataDir() . '/HTMLPurifier')) {
            ilUtil::makeDirParents(ilUtil::getDataDir() . '/HTMLPurifier');
        }
        
        return ilUtil::getDataDir() . '/HTMLPurifier';
    }
    
    final protected function removeUnsupportedElements($a_array)
    {
        $supportedElements = array();
        
        $notSupportedTags = array(
            'rp',
            'rt',
            'rb',
            'rtc',
            'rbc',
            'ruby',
            'u',
            'strike',
            'param',
            'object'
        );
        
        foreach ($a_array as $element) {
            if (!in_array($element, $notSupportedTags)) {
                $supportedElements[] = $element;
            }
        }

        return $supportedElements;
    }
    
    protected function makeElementListTinyMceCompliant($elements)
    {
        // Bugfix #5945: Necessary because TinyMCE does not use the "u"
        // html element but <span style="text-decoration: underline">E</span>
        
        if (in_array('u', $elements) && !in_array('span', $elements)) {
            $elements[] = 'span';
        }
        
        return $elements;
    }
}