[TYPO3-commerce] ugly hack for payment gateway

[Stephan Viftrup]

Hi

I thought ill post my results in integrating a gateway payment where 
the user must be redirected to an url and then return to your website 
after payment has been done. This is the case mostly in denmark if you 
do not own a ssl certificate yourself.

Perhaps someone can use it and maybe even integrate better as there are 
som complications.

I have changed the following in class.tx_commerce.pi3.php

	// variables the gateway needs	
	  $language = "da";
      $autocapture = "0";
	  // orderid is added 1000 because gateway needs 4 digits.
	  $ordernum = 1000 + $this->orderUid;
	  $merchant = "25571851";
      // get amount
	  $amount = $orderData['sum_price_gross'];
      $currency = "DKK";
      $okpage = "http://mediamax.dk/";
      $errorpage = "http://mediamax.dk/index.php?id=45";
      // result page where script will opdate orders payment_ref
	  $resultpage = "http://mediamax.dk/index.php?id=32&step=result";
      $md5secret = 
"vYTn54eSLUNZG8m81iC7h5s26k68u3R8M97rfj497VI4tX43JB3l152d7F11cx9D";
      $md5check = 
md5($language.$autocapture.$ordernum.$amount.$currency.$merchant.$okpage.$errorpage.$resultpage.$ccipage.$md5secret);
	 

 // gateway url
	  $action = "https://secure.quickpay.dk/quickpay.php";	


		// generate button for going to gateway. Needed because gateway only 
accepts POST variables.
		$payform = '<form name="listingForm" action="'.$action.'" method="post">';
		$payform .= '<input type="hidden" name="language" value="'.$language.'" />';
		$payform .= '<input type="hidden" name="autocapture" 
value="'.$autocapture.'" />';
		$payform .= '<input type="hidden" name="ordernum" value="'.$ordernum.'" />';
		$payform .= '<input type="hidden" name="merchant" value="'.$merchant.'" />';
		$payform .= '<input type="hidden" name="amount" value="'.$amount.'" />';
		$payform .= '<input type="hidden" name="currency" value="'.$currency.'" />';
		$payform .= '<input type="hidden" name="okpage" value="'.$okpage.'" />';
		$payform .= '<input type="hidden" name="errorpage" 
value="'.$errorpage.'" />';
		$payform .= '<input type="hidden" name="resultpage" 
value="'.$resultpage.'" />';
		$payform .= '<input type="hidden" name="md5checkV2" 
value="'.$md5check.'" /> <input type="submit" value="Gå til betaling" 
/></form>';
		
		// make ekstra MARKER for button
		// OBS! Must also be defined in FINISH template
		$markerArray['###PAYMENT_BUTTON###'] = $payform;


This is inserted in OUTPUT part of finishIt function. around line 780

Also needed is opdate script for resultpage of gateway - i have put 
this in same file at the beginning of  main function - but this is 
again not very pretty.

// RESULT FROM GATEWAY
				
		// return url from gateway
		if ($_REQUEST["step"] == 'result') {
		// gateway only accepts id with at least 4 digits, remove these again.
		$id = $_REQUEST["ordernum"] - 1000;
		
		//transaction is a POST value the Gateway returns - save it as payment_ref
		$fields_values = array ("payment_ref_id" => $_REQUEST["transaction"]);
		
		//Update order
		$GLOBALS['TYPO3_DB']->exec_UPDATEquery('tx_commerce_orders',"uid=$id", 
$fields_values);
		
		}

KNOW PROBLEMS
- This bypasses the normal payment structure hence making payment 
selection useless since this will happen no matter what you do.


Hope this can get the discussion more specific to this kind of gateway procedue


-- 
Regards

Stephan Viftrup
SV - Consult