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<?php
defined ('_JEXEC') or die();
/**
* CheckoutHTML interface for threatmetrix
*
* PHP Version 5.3
*
* @category Payment
* @package KlarnaAPI
* @author MS Dev <ms.modules@klarna.com>
* @copyright 2012 Klarna AB (http://klarna.com)
* @license http://opensource.org/licenses/BSD-2-Clause BSD-2
* @link http://integration.klarna.com/
*/
/**
* This interface provides methods to supply checkout page specific HTML.<br>
* Can be used to insert device identification, fraud prevention,<br>
* client side validation code into the checkout page.
*
* @category Payment
* @package KlarnaAPI
* @author MS Dev <ms.modules@klarna.com>
* @copyright 2012 Klarna AB (http://klarna.com)
* @license http://opensource.org/licenses/BSD-2-Clause BSD-2
* @link http://integration.klarna.com/
*/
abstract class CheckoutHTML
{
/**
* Creates a session ID used for e.g. client identification and fraud
* prevention.
*
* This method creates a 40 character long integer.
* The first 30 numbers is microtime + random numbers.
* The last 10 numbers is the eid zero-padded.
*
* All random functions are automatically seeded as of PHP 4.2.0.
*
* E.g. for eid 1004 output could be:
* 1624100001298454658880354228080000001004
*
* @param int $eid merchant id
*
* @return string A integer with a string length of 40.
*/
public static function getSessionID($eid)
{
$eid = strval($eid);
while (strlen($eid) < 10) {
$eid = "0" . $eid; //Zero-pad the eid.
}
$sid = str_replace(array(' ', ',', '.'), '', microtime());
$sid[0] = rand(1, 9); //Make sure we always have a non-zero first.
//microtime + rand = 30 numbers in length
while (strlen($sid) < 30) {
//rand is automatically seeded as of PHP 4.2.0
$sid .= rand(0, 9999);
}
$sid = substr($sid, 0, 30);
$sid .= $eid;
return $sid;
}
/**
* Initializes this object, this method is always called
* before {@link CheckoutHTML::toHTML()}.
* This method is used in {@link Klarna::addTransaction()},
* {@link Klarna::reserveAmount()} and in {@link Klarna::checkoutHTML()}
*
* @param Klarna $klarna The API instance
* @param int $eid merchant id
*
* @return void
*/
abstract public function init($klarna, $eid);
/**
* This returns the HTML code for this object,
* which will be used in the checkout page.
*
* @return string HTML
*/
abstract public function toHTML();
/**
* This function is used to clear any stored values
* (in SESSION, COOKIE or similar)
* which are required to be unique between purchases.
*
* @return void
*/
abstract public function clear();
}
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