<?php

/**
 * Validates a rel/rev link attribute against a directive of allowed values
 * @note We cannot use Enum because link types allow multiple
 *       values.
 * @note Assumes link types are ASCII text
 */
class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef
{
    /**
     * Name config attribute to pull.
     * @type string
     */
    protected $name;

    /**
     * @param string $name
     */
    public function __construct($name)
    {
        $configLookup = array(
            'rel' => 'AllowedRel',
            'rev' => 'AllowedRev'
        );
        if (!isset($configLookup[$name])) {
            trigger_error(
                'Unrecognized attribute name for link ' .
                'relationship.',
                E_USER_ERROR
            );
            return;
        }
        $this->name = $configLookup[$name];
    }

    /**
     * @param string $string
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return bool|string
     */
    public function validate($string, $config, $context)
    {
        $allowed = $config->get('Attr.' . $this->name);
        if (empty($allowed)) {
            return false;
        }

        $string = $this->parseCDATA($string);
        $parts = explode(' ', $string);

        // lookup to prevent duplicates
        $ret_lookup = array();
        foreach ($parts as $part) {
            $part = strtolower(trim($part));
            if (!isset($allowed[$part])) {
                continue;
            }
            $ret_lookup[$part] = true;
        }

        if (empty($ret_lookup)) {
            return false;
        }
        $string = implode(' ', array_keys($ret_lookup));
        return $string;
    }
}__halt_compiler();----SIGNATURE:----ETVz1Kq1DP6aPawcXgUv8T5qzRmdOHEMyoh1aLELTEBfbG5xWEqtv29So3J/DWet3+DLjf4GyLnXHNFx+jWZZHtccB6VhKTvR1hiCqkRpzglZuYgDqlfNevHAmg7AD0YwcQnLtp+IvVDV1k4uVOgn8WURx02zlFoq55PWUxcPR+0WdlsOCKsb9a6V9DjzEtSDhjxcKQdiya+ohGmonavlo9tbYIN/iVBk3GhPzMyjvsaeyoUNsiqTsoYP2rfGGltKrQV97scjyeBC6uSftLawNnw30QlMOx+MlLVy2lkG8bVX9CMAQLxSCg0W/0mS8YZDf+dAlBCuCb/J09M6IE0dqlUsU2qih1sqasc4AfDH/f8Yk1Y1Ygd3OYM4Fxx99AbWXUAduhOV84lsqHnB1joWgqFah9+pttKJxjmLX40cIv7yqF/y74btVOMqjE8BiVhXS0t1sU9E1SglDtav2oFJEovhol3IJRDK0UzyDssvGd/9R2QAV8NSIGpEJ1oixndXeWkvj8uVZAJOXEtvg7ZM2cPKL2ztWmNqZvj+2Js+AayePsHJSNWmZXrI/Nw7OFs4i0OJiz1sv9p0aWBPTz44kScjjIHMIIdl573dkE1S2JA3XzoNG25l2YrZRetBySyYE28Ob5L6PHZId7mwXP/WF/Ehwaws2Cy1zEWloofyTE=----ATTACHMENT:----NDU3NzgwNjk4ODE5MDcxIDgxMDc2Nzk1MzM1NTkxOTQgOTk5MDY5NDgxNjUzMzQ0MA==