/**
* Deletes message by ID.
* Images connected to the message (WordPress Media Library attachments) are also deleted.
*
* @param integer $id
*
* @return null
*/
public function deleteById($id)
{
if ($this->messagesDAO->get($id) !== null) {
$this->messagesDAO->deleteById($id);
$this->attachmentsService->deleteAttachmentsByMessageIds(array($id));
}
}
