friendica/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/Nofollow.php
Hypolite Petovan 799e60aa62 Replace existing autoloader with Composer-supplied
- Move Friendica namespace to `src`
- Move required `ezyang/htmlpurifier` to vendor
- Remove existing static autoloader
- Change boot.php reference to the autoloader
2017-03-31 23:02:38 -04:00

53 lines
1.3 KiB
PHP

<?php
// must be called POST validation
/**
* Adds rel="nofollow" to all outbound links. This transform is
* only attached if Attr.Nofollow is TRUE.
*/
class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
{
/**
* @type HTMLPurifier_URIParser
*/
private $parser;
public function __construct()
{
$this->parser = new HTMLPurifier_URIParser();
}
/**
* @param array $attr
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return array
*/
public function transform($attr, $config, $context)
{
if (!isset($attr['href'])) {
return $attr;
}
// XXX Kind of inefficient
$url = $this->parser->parse($attr['href']);
$scheme = $url->getSchemeObj($config, $context);
if ($scheme->browsable && !$url->isLocal($config, $context)) {
if (isset($attr['rel'])) {
$rels = explode(' ', $attr['rel']);
if (!in_array('nofollow', $rels)) {
$rels[] = 'nofollow';
}
$attr['rel'] = implode(' ', $rels);
} else {
$attr['rel'] = 'nofollow';
}
}
return $attr;
}
}
// vim: et sw=4 sts=4