class.ilTermsOfServiceDocumentHtmlPurifier.php

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<?php
/* Copyright (c) 1998-2018 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilTermsOfServiceDocumentHtmlPurifier extends \ilHtmlPurifierAbstractLibWrapper
{
    private $allowedTags = [];

    protected $cacheDirectory = '';

    public function __construct(array $allowedTags = null, string $cacheDirectory = null)
    {
        if (null === $cacheDirectory) {
            $cacheDirectory = \ilHtmlPurifierAbstractLibWrapper::_getCacheDirectory();
        }
        $this->cacheDirectory = $cacheDirectory;

        if (null === $allowedTags) {
            $allowedTags = \ilObjAdvancedEditing::_getUsedHTMLTags('textarea');
        }
        $this->allowedTags = $allowedTags;

        parent::__construct();
        $this->allowedTags = $allowedTags;
    }

    protected function getPurifierConfigInstance()
    {
        $config = \HTMLPurifier_Config::createDefault();
        $config->set('HTML.DefinitionID', 'ilias termsofservice document');
        $config->set('HTML.DefinitionRev', 1);
        $config->set('HTML.TargetBlank', true);
        $config->set('Cache.SerializerPath', $this->cacheDirectory);
        $config->set('HTML.Doctype', 'XHTML 1.0 Strict');

        $tags = $this->allowedTags;
        $tags = $this->makeElementListTinyMceCompliant($tags);

        $tags[] = 'b';
        $tags[] = 'i';

        $config->set('HTML.AllowedElements', $this->removeUnsupportedElements($tags));
        $config->set('HTML.ForbiddenAttributes', 'div@style');

        if ($def = $config->maybeGetRawHTMLDefinition()) {
            $def->addAttribute('a', 'target', 'Enum#_blank,_self,_target,_top');
        }

        return $config;
    }
}