Flexible media resource path

assets/ID/000/
                     00/
                         1 -> ID: 1 -> assets/ID/000/00/1
                         2 -> ID: 2 -> assets/ID/000/00/2
                         ...
                     10/
                     20/
                        1 -> ID: 21 -> assets/ID/000/20/1
                        2 -> ID: 22 -> assets/ID/000/20/2
                        ...
                     ...
assets/ID/100/
assets/ID/200/
assets/ID/...

assets/img/ID[[!pathToDocFolder]]

<?php
/* documentResourcePath Snippet                                               */
/* Returns a path string depending on the id of the current resource */
/* Example: 0000/100/20/0/ = 120                            */

$docID = $modx->resource->get('id');

    $maxDocs        = 9999;
    $maxKey         = count( str_split( $maxDocs ) ) - 1;
    
    $digits         = str_split( $docID );
    $numberOfDigits = count( $digits );

    /* mirrow array */
    $digits = array_reverse($digits);
    
    /* add missing key/value pairs to the array */
    for( $key=0; $key <= $maxKey ;$key++ ){
        if( !array_key_exists( $key, $digits ) ) {
            $digits[$key] = "0";
        }
    }

    /* mirrow again */
    $digits = array_reverse($digits);

    /* add trailing zeros to array values */
    foreach( $digits as $key => $value ) {
        $suffix = "";
        for( $i=$key; $i < $maxKey; $i++ ) {
	    $suffix .= "0";
        }
      $digits[$key] = $value.$suffix."/";
    }

    $docResourcePath = "";
    
    /* combine all values to a path*/
    foreach ( $digits as $key => $value ){
        $docResourcePath .= $value;
    }

    return $docResourcePath;

$modx->event->output($modx->toJson($params));

if (!function_exists('processMediaPathes')) {
    function processMediaPathes($path)
    {
        global $modx;
        $chunk = $modx->newObject('modChunk');
        $chunk->setContent($path);
        $chunk->setCacheable(false);
        return $chunk->process();
    }
}


switch ($modx->event->name) {
    case 'OnMediaSourceGetProperties':

        $sourceUpdateActionID = 0;
        if ($object = $modx->getObject('modAction', array('namespace' => 'core', 'controller' => 'source/update', ))) {
            $sourceUpdateActionID = $object->get('id');
        }

        $params = $modx->fromJson($scriptProperties['properties']);
        // don't manpulate-path if updating mediasource
        if (empty($params['processPath']) || $_REQUEST['a'] == $sourceUpdateActionID) {
            $modx->event->output($scriptProperties['properties']);
            return;
        }


        //$path = $params['basePath']['value'];
        //$modx->parser->processElementTags('',$path,true,true);
        if (!is_Object($modx->resource)) {
            //try to get the actual resource out from HTTP_REFERER
            $parsedUrl = parse_url($_SERVER['HTTP_REFERER']);
            parse_str($parsedUrl['query'], $parsedQuery);
            if (isset($parsedQuery['amp;id'])) {
                $parsedQuery['id'] = $parsedQuery['amp;id'];
            }
            if (isset($parsedQuery['id'])) {
                $modx->resource = $modx->getObject('modResource', $parsedQuery['id']);
            }
        }

        $params['basePath']['value'] = processMediaPathes($params['basePath']['value']);
        $params['baseUrl']['value'] = processMediaPathes($params['baseUrl']['value']);

        $modx->event->output($modx->toJson($params));

        $debug['http_referer'] = $_SERVER['HTTP_REFERER'];
        $debug['parsedUrl'] = $parsedUrl;
        $debug['parsedQuery'] = $parsedQuery;

        $debug['basePath'] = $params['basePath']['value'];


        $chunk = $modx->getObject('modChunk', array('name' => 'debug'));
        $chunk->setContent($chunk->get('snippet') . print_r($debug, 1));
        $chunk->save();

        break;
}
return;

[[!Executioner? 
   &tElementClass=`modSnippet` 
   &tElement=`getResourceField`
   &tEcho=`comment`
      &id=`27` 
      &field=`nav248` 
      &processTV=`1` 
      &default=`Sorry, no data available`
      &docid=`27` 
]]

[[!Executioner? 
   &tElementClass=`modSnippet` 
   &tElement=`getResourceField`
   &tEcho=`comment`
      &id=`27` 
      &field=`pagetitle` 
      &default=`Sorry, no data available`
      &docid=`27` 
]]