Magento coupon code generator sample configuration file

V1.php

<?php
/* Coupon AutoGen REST API
*
* @category CouponDemo
* @package CouponDemo_AutoGen
* @author Chuck Hudson (used with permission). For more recipes, see Chuck's book http://shop.oreilly.com/product/0636920023968.do
*/

class CouponDemo_AutoGen_Model_Api2_Coupon_Rest_Admin_V1 extends CouponDemo_AutoGen_Model_Api2_Coupon
{
    /**
     * Generate one or more coupon codes using the Generate Coupons rule defined in Magento.
     * Expected parameters are:
     * {
     *    'qty': int, - number of coupon codes to instruct Magento to generate
     *    'length': int, - length of each generated coupon code
     *    'format': string, - alphanum (for alphanumeric codes), alpha (for alphabetical codes), and num (for numeric codes)
     * }
     *
     * @param array $couponData
     * @return string|void
     */
    protected function _create($couponData)
    {
        $ruleId = $this->getRequest()->getParam('rule_id');
        $couponData['rule_id'] = $ruleId;

        $rule = $this->_loadSalesRule($ruleId);
        // Reference the MassGenerator on this rule.
        /** @var Mage_SalesRule_Model_Coupon_Massgenerator $generator */
        $generator = $rule->getCouponMassGenerator();
        // Validate the generator
        if (!$generator->validateData($couponData)) {
            $this->_critical(Mage::helper('salesrule')->__('Coupon AutoGen API: Invalid parameters passed in.'),
                Mage_Api2_Model_Server::HTTP_BAD_REQUEST);
        } else {
            // Set the data for the generator
            $generator->setData($couponData);
            // Generate a pool of coupon codes for the Generate Coupons rule
            $generator->generatePool();
        }
    }

    /**
     * Retrieve list of coupon codes.
     *
     * @return array
     */
    protected function _retrieveCollection()
    {
        $ruleId = $this->getRequest()->getParam('rule_id');
        $rule = $this->_loadSalesRule($ruleId);
        /** @var Mage_SalesRule_Model_Resource_Coupon_Collection $collection  */
        $collection = Mage::getResourceModel('salesrule/coupon_collection');
        $collection->addRuleToFilter($rule);

        $this->_applyCollectionModifiers($collection);

        $data = $collection->load()->toArray();
        return $data['items'];
    }

    /**
     * Load sales rule by ID.
     *
     * @param int $ruleId
     * @return Mage_SalesRule_Model_Rule
     */
    protected function _loadSalesRule($ruleId)
    {
        if (!$ruleId) {
            $this->_critical(Mage::helper('salesrule')
                ->__('Rule ID not specified.'), Mage_Api2_Model_Server::HTTP_BAD_REQUEST);
        }

        $rule = Mage::getModel('salesrule/rule')->load($ruleId);
        if (!$rule->getId()) {
            $this->_critical(Mage::helper('salesrule')
                ->__('Rule was not found.'), Mage_Api2_Model_Server::HTTP_NOT_FOUND);
        }

        return $rule;
    }
}