<?php
/*
 * AddHeaderfiles
 * Adds CSS or JS in a document (at the end of the head or the end of the body)
 * License GPL
 * Based upon: http://www.partout.info/css_modx.html
 * Version 0.4 (27. July 2011)
 * Authors: Jako and Mithrandir
 * See http://www.modxcms.de/forum/comments.php?DiscussionID=926&page=1#Item_4
 * and following posts for details
 *
 * Parameters:
 * &addcode - name(s) of external file(s) or chunkname(s) separated by semicolon
              these external files can have a position setting or media type 
              separated by pipe
 * &sep -     separator for files/chunknames
 * &sepmed -  seperator for media type or script position
 */

// Options - change default media for css here:
$mediadefault = 'screen, tv, projection';

// Check Parameters and set them to default values
$sep = (isset($sep)) ? $sep : ';';
$sepmed = (isset($sepmed)) ? $sepmed : '|';
$addcode = (isset($addcode)) ? $addcode : '';

if (!function_exists('AddHeaderfiles')) {
    function AddHeaderfiles($addcode, $sep, $sepmed, $mediadefault)
    {
        global $modx;

        if ((strpos(strtolower($addcode), '<script') !== false) || (strpos(strtolower($addcode), '<style') !== false)) {
            return $addcode;
        } else {
            $parts = explode($sep, $addcode);
        }
        foreach ($parts as $part) {
            $part = explode($sepmed, $part, 2);
            if ($chunk = $modx->getChunk($part[0])) {
                // part of the parameterchain is a chunkname
                $part[0] = AddHeaderfiles($chunk, $sep, $sepmed, $mediadefault);
                if (strpos(strtolower($part[0]), '<style') !== false) {
                    $modx->regClientCSS($part[0]);
                } else {
                    if ($part[1] != 'end') {
                        $modx->regClientStartupScript($part[0]);
                    } else {
                        $modx->regClientScript($part[0]);
                    }
                }
            } else {
                // otherwhise it is treated as a filename
                if (substr($part[0], -4) == '.css') {
                    $modx->regClientCSS($part[0], (isset($part[1]) ? $part[1] : $mediadefault));
                } else {
                    if ($part[1] != 'end') {
                        $modx->regClientStartupScript($part[0]);
                    } else {
                        $modx->regClientScript($part[0]);
                    }
                }
            }
        }
    }
}

if ($addcode != '') {
    $addcode = AddHeaderfiles($addcode, $sep, $sepmed, $mediadefault);
    if (strpos(strtolower($addcode), '<style') !== false) {
        $modx->regClientCSS($addcode);
    } else {
        $modx->regClientStartupScript($addcode);
    }
}
return '';