MODX Plugin

UniqueAlias

<?php
// UniqueAlias
$eventName = $modx->event->name;
switch($eventName) {
  case 'OnResourceDuplicate':
  
    if($newResource->get('alias')) {
      $alias = $newResource->get('alias');
    }
    else {
      $alias = $newResource->cleanAlias($newResource->get('pagetitle'));
    }
    $alias .= '-'.$newResource->get('id');
    $newResource->set('alias', $alias);
    $newResource->save();
  
  break;
  
  case 'OnDocFormSave':
    // If no custom alias, generation of unique alias from pagetitle
    if(empty($_REQUEST['alias'])) {
      $alias = $resource->cleanAlias($resource->get('pagetitle')).'-'.$resource->get('id');
      $resource->set('alias', $alias);
      $resource->save();
    }
  break;
}