class.ilHtmlForumPostPurifier.php

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<?php

declare(strict_types=1);

class ilHtmlForumPostPurifier extends ilHtmlPurifierAbstractLibWrapper
{
    protected function getPurifierConfigInstance(): HTMLPurifier_Config
    {
        $config = HTMLPurifier_Config::createDefault();
        $config->set('HTML.DefinitionID', 'ilias forum post');
        $config->set('HTML.DefinitionRev', 2);
        $config->set('Cache.SerializerPath', ilHtmlPurifierAbstractLibWrapper::_getCacheDirectory());
        $config->set('HTML.Doctype', 'XHTML 1.0 Strict');

        $tags = ilObjAdvancedEditing::_getUsedHTMLTags('frm_post');
        $tags = $this->makeElementListTinyMceCompliant($tags);
        $config->set('HTML.AllowedElements', $this->removeUnsupportedElements($tags));
        $config->set('HTML.ForbiddenAttributes', 'div@style');

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

        return $config;
    }
}