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pay.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Redirects to the cardinity checkout for payment
*
* @package paygw_cardinity
* @copyright 2021 Brain station 23 ltd.
* @author Brain station 23 ltd.
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
use core_payment\helper;
require_once(__DIR__ . '/../../../config.php');
require_login();
global $CFG, $USER, $DB;
$component = required_param('component', PARAM_ALPHANUMEXT);
$paymentarea = required_param('paymentarea', PARAM_ALPHANUMEXT);
$itemid = required_param('itemid', PARAM_INT);
$courseid = $DB->get_field('enrol', 'courseid', ['enrol' => 'fee', 'id' => $itemid]);
$config = (object)helper::get_gateway_configuration($component, $paymentarea, $itemid, 'cardinity');
$payable = helper::get_payable($component, $paymentarea, $itemid);
$surcharge = helper::get_gateway_surcharge('cardinity');
$cost = helper::get_rounded_cost($payable->get_amount(), $payable->get_currency(), $surcharge);
$amount = number_format((float)$cost, 2, '.', '');
$cancelurl = $CFG->wwwroot . '/payment/gateway/cardinity/cancel.php?courseid=' . $courseid . '&component=' . $component .
'&paymentarea=' . $paymentarea . '&itemid=' . $itemid;
$country = !empty($USER->country) ? $USER->country : 'Liechtenstein';
$language = "EN";
$currency = $payable->get_currency();
$description = 'description';
$orderid = uniqid();
$returnurl = $CFG->wwwroot . '/payment/gateway/cardinity/process.php?courseid=' .
$courseid . '&component=' . $component .
'&paymentarea=' . $paymentarea . '&itemid=' . $itemid;
$projectid = $config->clientid;
$projectsecret = $config->secretkey;
$attributes = [
"amount" => $amount,
"currency" => $currency,
"country" => $country,
"language" => $language,
"order_id" => $orderid,
"description" => $description,
"project_id" => $projectid,
"cancel_url" => $cancelurl,
"return_url" => $returnurl,
];
ksort($attributes);
$message = '';
foreach ($attributes as $key => $value) {
$message .= $key . $value;
}
$signature = hash_hmac('sha256', $message, $projectsecret);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Cardinity Hosted Payment Page</title>
</head>
<body onload="document.forms['checkout'].submit()">
<div class="loader"></div>
<form name="checkout" method="POST" action="https://checkout.cardinity.com">
<input type="hidden" name="amount" value="<?php echo $amount; ?>"/>
<input type="hidden" name="cancel_url" value="<?php echo $cancelurl; ?>"/>
<input type="hidden" name="country" value="<?php echo $country; ?>"/>
<input type="hidden" name="language" value="<?php echo $language; ?>"/>
<input type="hidden" name="currency" value="<?php echo $currency; ?>"/>
<input type="hidden" name="description" value="<?php echo $description; ?>"/>
<input type="hidden" name="order_id" value="<?php echo $orderid; ?>"/>
<input type="hidden" name="project_id" value="<?php echo $projectid; ?>"/>
<input type="hidden" name="return_url" value="<?php echo $returnurl; ?>"/>
<input type="hidden" name="signature" value="<?php echo $signature; ?>"/>
</form>
</body>
</html>