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