function update_files_list()
{
  $query  = "INSERT INTO files (Nazwa) VALUES (:Nazwa)";
  
  if(!($stm = $this->dbo->prepare($query))){
    $this->setMessage("Wystpi bd serwera.");
    return ACTION_FAILED;
  }
  $count = 0;
  if($dir = scandir($this->filespath)){
    foreach($dir as $file){
      if(is_file($this->filespath.$file)){
        if($stm->execute(array('Nazwa'=>$file)) && 
           $stm->rowCount()){
          $count++;
        }
      }
    }
  }
  $this->setMessage("Liczba dodanych wierszy: $count");
  return ACTION_OK;
}