public function cmdDeleteCollection()
    {
        $id = $this->getParam(0);
        $all = $this->getParam('all');

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

        $options = null;

        if (isset($id)) {

            if ($this->getParam('type')) {
                $options = array('type' => $id);
            } else if ($this->getParam('store')) {

                if (!is_numeric($id)) {
                    $this->errorAndExit($this->text('Invalid argument'));
                }

                $options = array('store_id' => $id);
            }

        } else if (!empty($all)) {
            $options = array();
        }

        if (isset($options)) {

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

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

        } else {

            if (!is_numeric($id)) {
                $this->errorAndExit($this->text('Invalid argument'));
            }

            $result = $this->collection->delete($id);
        }

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

        $this->output();
    }