How to create magento helper class? - php

Question

I have the following magento helper class.
class CommissionJunction extends Mage_Core_Helper_Data
{
/**
* Get SKU, quantity, price and discount amount for each product in a given order
* #param object $order
* #return array
*/
private function _getOrderProductsList($order) {
$orderItems = $order->getAllItems();
$purchasedSkus = array();
$count_orderItems = count($orderItems);
for($i = 0; $i < $count_orderItems; $i++) {
$purchasedSkus[$i] = array(
'ITEM' => $orderItems[$i]['sku'],
'QTY' => number_format($orderItems[$i]['qty_ordered'],0), // no decimals
'AMT' => number_format($orderItems[$i]['price'],2) // 2 decimal places
'DCNT' => number_format(abs($orderItems[$i]['discount_amount']),2) */
);
}
return $purchasedSkus;
}
/**
* Get the Universal Data (JSON) Object for Commission Junction.
* This object contains the order details passed on to Commission Junction for reporting purposes
* on the Checkout Success / Order Confirmation page.
* Notes:
* - CID, TYPE AND CURRENCY are hard coded
* #param string $orderId
* #return JSON object Universal Data Object for Commission Junction $json_masterTmsUdp
*/
public function getCommissionJunctionUdo($orderId) {
$order = Mage::getModel('sales/order')->loadByIncrementId($orderId);
$udo = array();
$udo['CID'] = 'XXXX';
$udo['TYPE'] = 'XXXX';
$udo['CURRENCY'] = 'USD';
$udo['OID'] = $orderId;
$udo['DISCOUNT'] = number_format(abs($order->discount_amount),2);
$order_coupon_code = $order->coupon_code;
if(!is_null($order_coupon_code) && !empty($order_coupon_code)) {
$udo['COUPON'] = $order_coupon_code;
}
$udo['PRODUCTLIST'] = self::_getOrderProductsList($order);
if(Mage::getModel('core/cookie')->get('aff_commissionjunction') == 'cjafflx') {
$udo['FIRECJ'] = "TRUE";
}
else {
$udo['FIRECJ'] = "FALSE";
}
$masterTmsUdo['CJ'] = $udo;
$json_masterTmsUdo = json_encode($masterTmsUdo);
return $json_masterTmsUdo;
}
}
And I found this site where they explain how to register a helper class
http://codegento.com/2011/02/creating-a-helper-class/
The only thing I dont know its:
Where in the magento structure should I add this php class?
Where is the config.xml I should edit?

Answer 1

User created classes should be placed in this folder:
app/code/community
Another issue, you should use the same naming convention for your class as Magento uses i.e.
MOduleNameSpace_ComissionJunction_Helper_Data
Also the config XML should be placed in your app/code/community/ MOduleNameSpace/ComissionJunction/etc folder