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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2019 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Services;
use HTMLPurifier;
use HTMLPurifier_AttrDef_Enum;
use HTMLPurifier_Config;
/**
* Filter/sanitize HTML
*/
class HtmlService
{
/**
* Take some dirty HTML (as provided by the user), and clean it before
* we save/display it.
*
* @param string $html
*
* @return string
*/
public function sanitize(string $html): string
{
$config = HTMLPurifier_Config::createDefault();
$config->set('Cache.DefinitionImpl', null);
$config->set('HTML.TidyLevel', 'none'); // Only XSS cleaning now
$def = $config->getHTMLDefinition(true);
// Allow image maps
$def->addAttribute('img', 'usemap', 'CDATA');
$map = $def->addElement('map', 'Block', 'Flow', 'Common', [
'name' => 'CDATA',
'id' => 'ID',
'title' => 'CDATA',
]);
$map->excludes = ['map' => true];
$area = $def->addElement('area', 'Block', 'Empty', 'Common', [
'name' => 'CDATA',
'id' => 'ID',
'alt' => 'Text',
'coords' => 'CDATA',
'accesskey' => 'Character',
'nohref' => new HTMLPurifier_AttrDef_Enum(['nohref']),
'href' => 'URI',
'shape' => new HTMLPurifier_AttrDef_Enum(['rect', 'circle', 'poly', 'default']),
'tabindex' => 'Number',
'target' => new HTMLPurifier_AttrDef_Enum(['_blank', '_self', '_target', '_top']),
]);
$area->excludes = ['area' => true];
$purifier = new HTMLPurifier($config);
return $purifier->purify($html);
}
}
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