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<?php
namespace MoneticoDemoWebKit;
use MoneticoDemoWebKit\Monetico\HmacComputer;
class ResponseInterface
{
/**
* This is an example of response interface implementation.
* It is displayed inside the iframe of the response example page.
*/
function __construct()
{
// Fields can be provided by both GET or POST method. This is due to the fact that the
// Monetico system uses the POST method. If the response interface returns an error, a mail is sent with
// a link to the response interface with all payments parameters. Clicking this link will trigger a GET request
// to the response interface.
// Therefore, you must be capable to handle a response interface request being it sent through GET or POST method.
$receivedData = $_SERVER['REQUEST_METHOD'] === 'GET' ? $_GET : $_POST;
if (array_key_exists("MAC", $receivedData)) {
$receivedSeal = $receivedData['MAC'];
unset($receivedData['MAC']); // removes the MAC field itself
$isSealValidated = (new HmacComputer())->validateSeal($receivedData, CLE_MAC, $receivedSeal);
if ($isSealValidated) {
// The seal has been validated so you can do any business treatment here.
// Take care of the "code-retour" field which contains "payetest" for payments that have been done
// in the sandbox environment and are, therefore, not real payments.
//
// Remember that the response interface can be called multiple times for the same payment.
// This can happen for example if the customer tries to pay with a bank card that is refused and then
// tries a second time with a valid one. Your response interface would then receive a first notification
// indicating that the payment has been refused and a second one later indicating that it has been accepted.
//
// Please refer to the technical documentation for a complete description of all provided parameters.
// Example :
$codeRetour = $receivedData["code-retour"];
$isSandboxPayment = $codeRetour === "payetest";
$isPaymentValidated = substr($codeRetour, 0, strlen("paiement")) === "paiement";
// Split payment only
$instalmentNumber = 1;
if (strpos(strtolower($codeRetour), "_pf")) {
$instalmentNumber = substr($codeRetour, strpos($codeRetour, '_pf') + 3);
}
if ($isPaymentValidated && !$isSandboxPayment) {
// Proceed to delivery
}
}
$this->respondWithSealValidationResult($isSealValidated);
} else {
throw new \InvalidArgumentException("Unable to verify the sealing since received data did not contain MAC field.");
}
}
private function respondWithSealValidationResult(bool $isSealValidated)
{
header("Content-Type: text/plain");
echo "version=2\ncdr=";
echo $isSealValidated ? "0" : "1";
}
}