Messages::_saveMessage PHP Method

    private function _saveMessage()
    {
        if ($this->validateForm() === TRUE) {
            $save_type = is_numeric($this->input->post('save_as_draft')) ? $this->lang->line('text_saved_to_draft') : $this->lang->line('text_sent');
            if ($message_id = $this->Messages_model->saveMessage($this->input->get('id'), $this->input->post())) {
                $this->alert->set('success', sprintf($this->lang->line('alert_success'), 'Message ' . $save_type));
            } else {
                $this->alert->set('warning', sprintf($this->lang->line('alert_error_nothing'), $save_type));
            }
            return $message_id;
        }
    }