/**
  * Deletes an individual post based on its ID
  *
  * @Privilege("delete")
  *
  * @param int $id           Guestbook post ID
  */
 public function handleDelete($id)
 {
     $this->guestbook->deletePost($id);
     $this->flashMessage("Zpráva byla smazána");
     $this->redirect('Guestbook:');
 }