<?php
if($resource->get('class_key') == 'modStaticResource'){
    $resource->set('template', 0); /*optional. i didn't need these to have templates and i assume loading one is slower than not.
                                     plus if a text or html static resource has a template the file will be inserted into the content area like a page*/
    
    $path = $resource->get('content');
    if(count(explode('/', $path)) > 2) return;
    
    $msid = $modx->getOption('default_media_source', null, 'default');
    $ms = $modx->getObject('modMediaSource', $msid);
    $props = $ms->getProperties();
    $path = $props['baseUrl']['value'].explode('assets/usermedia', $path)[1];
    
    $resource->set('content', $path);
}

return;