récupère la position d'une ressource ainsi que le nombre de ressource de son parent

gistfile1.txt

<?php
$count = 0;
$IdAvant='';
$IdApres='';
$position='';
$criteria = array(
  'parent' => $parent,
  'deleted' => false,
  'published' => true,
);

  $count = $modx->getCount('modResource', $criteria);

  $fieldmenuindex='menuindex';
  $criteria = $modx->newQuery('modResource');
  $criteria->select($modx->getSelectColumns('modResource','modResource','',array('id',$fieldmenuindex)));
  $criteria->where(array('id'=>$id));
  $resource = $modx->getObject('modResource',$criteria);
  $fieldValue = $resource->get($fieldmenuindex);
  $menuindex = $fieldValue;
  
  if ($menuindex == ($count-1)) {
  $position='dernier';
  }
  else if ($menuindex == 0) {
  $position='permier';
  }
  else {
  $position='milieu';
  $positionAvant=$menuindex-1;
  $positionApres=$menuindex+1;
    
  $criteria = $modx->newQuery('modResource');
  $criteria->select($modx->getSelectColumns('modResource','modResource','',array('id')));
  $criteria->andCondition(array('parent' => $parent));
  $criteria->andCondition(array('menuindex'=>$positionAvant));
  $resource = $modx->getObject('modResource',$criteria);
  $fieldValue = $resource->get('id');
  $IdAvant = $fieldValue;
    
  $criteria = $modx->newQuery('modResource');
  $criteria->select($modx->getSelectColumns('modResource','modResource','',array('id')));
  $criteria->andCondition(array('parent' => $parent));
  $criteria->andCondition(array('menuindex'=>$positionApres));
  $resource = $modx->getObject('modResource',$criteria);
  $fieldValue = $resource->get('id');
  $IdApres = $fieldValue;

  }
  
    return $count.'_'.$menuindex.'_'.$IdAvant.'_'.$IdApres.'_'.$position;