public function cmdDeleteCountry()
    {
        $code = $this->getParam(0);
        $all = $this->getParam('all');

        if (empty($code) && empty($all)) {
            $this->errorAndExit($this->text('Invalid command'));
        }

        $result = null;

        if (!empty($code)) {
            $result = $this->country->delete($code);
        } else if (!empty($all)) {

            $deleted = $count = 0;
            foreach ($this->country->getList() as $item) {
                $count++;
                $deleted += (int) $this->country->delete($item['code']);
            }

            $result = $count && $count == $deleted;
        }

        if (empty($result)) {
            $this->errorAndExit($this->text('Unexpected result'));
        }

        $this->output();
    }