gistfile1.php

<?php

...

    /*
     *
     * Option tests below here.
     *
     *
     */

    public function top_level_product_no_options($params)
    {
        extract($params);

        if (
            $this->topLevel($product)
            && $option_count === 0
        ) {
            $model->setProductTypeId($this->TYPE_PRODUCT);
            return __METHOD__;
        }

        return false;
    }

    public function single_option_distributor_id_1($params)
    {
        extract($params);

        if (
            $option_count === 1
            && 1 === (int) $product['distributor_id']
        ) {
            $model->setProductTypeId($this->TYPE_SHELL);
            $option = $this->createOption($product['options'][0]);
            $model->addOption($option);
            return __METHOD__;
        }

        return false;
    }

    public function single_option_no_sub_options($params)
    {
        extract($params);

        if (
            $option_count === 1
            && !$this->hasSubOptions($product['options'][0])
        ) {
            $model->setProductTypeId($this->TYPE_SHELL);
            $option = $this->createOption($product['options'][0]);
            $model->addOption($option);
            return __METHOD__;
        }

        return false;
    }