<?php
/**
 * Markup dereferer
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package wb
 * @subpackage Markup
 */

WBClass::load('WBMarkup_Dereferencer');

/**
 * Markup dereferer
 *
 * Find list of references stored in XML node
 *
 * @version 0.2.0
 * @package wb
 * @subpackage Markup
 */
class WBMarkup_Dereferencer_Wb_Url extends WBMarkup_Dereferencer
{
    /**
     * @var WBDictionary_URL
     */
    static private $dict;

    private function initDict()
    {
        if (!empty(self::$dict)) {
            return;
        }
        self::$dict =   WBClass::create('WBDictionary_URL');
    }

    /**
     * get references
     *
     * Scan for refering ids and return list of them.
     *
     * @param array $node to be modified document node
     * @return array
     */
    public function getReferences($node)
    {
        $urlid  =   $node['attributes']['urlid'];

        $refs   =   array('wb' => array());
        $refs['wb']['url']  =   array($urlid);

        // seek for URLs to VFSFiles
        $this->initDict();
        self::$dict->load($urlid);
        $info   =   self::$dict->get();

        // add VFSFile
        if ('self' != $info['protocol'] || 0 != strncmp('[[SERVICE_FILE]]', $info['path'], 16)) {
            return $refs;
        }

        // strip [[SERVICE_FILE]]XY
        $t  =   substr($info['path'], 18);
        // strip rest of path
        $t  =   explode('/', $t);
        $t  =   $t[0];

        $refs['wb']['vfsfile']  =   array($t);
        return $refs;
    }
}