Change template for @datarecall #modx

gistfile1.php

<?php

$parent = 5;
$resourceWithChildrenTpl = 1;
$resourceWithoutChildrenTpl = 2;


$childs = $modx->getChildIds($parent);

foreach ($modx->getIterator('modResource',array('id:IN' => $childs)) as $resource) {
  if ($resource->get('parent') == $parent) {
    if ($resource->hasChildren() > 0) {
      $resource->set('template', $resourceWithChildrenTpl);
      $resource->save();
    } else {
      $resource->set('template', $resourceWithoutChildrenTpl); 
      $resource->save();
  }
}