Proyectos de Subversion Moodle

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<?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