<?php
/**
* Moodec DPS Gateway
*
* @package local
* @subpackage local_moodec
* @author Thomas Threadgold
* @copyright 2015 LearningWorks Ltd
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once dirname(__FILE__) . '/../../../../config.php';
require_once $CFG->dirroot . '/local/moodec/lib.php';
$transactionID = required_param('id', PARAM_INT);
// plugin instance id
require_login();
$transaction = new MoodecTransaction($transactionID);
// If the transaction is already completed, we do not want to do it again
if ($transaction->get_status() === MoodecTransaction::STATUS_COMPLETE) {
redirect(new moodle_url($CFG->wwwroot . '/local/moodec/pages/cart.php'));
}
$gateway = new MoodecGatewayDPS($transaction);
$response = $gateway->begin();
// abort if DPS returns an invalid response
if ($response->attributes()->valid != '1') {
print_error('error_dpsinitiate', 'local_moodec');
} else {
// otherwise, redirect to the DPS provided URI
redirect($response->URI);
}
/**
* Constructor will check if any SESSION or COOKIE exists and will load that data if so.
* Otherwise, an empty cart is initialised
*/
function __construct()
{
// By default, the cart is empty
$this->_products = array();
$this->_cartTotal = 0;
$this->_transactionId = null;
$sessionTime = 0;
$sessionProducts = array();
$sessionCartTotal = 0;
$sessionVersion = '';
$sessionData = array();
$cookieTime = 0;
$cookieProducts = array();
$cookieCartTotal = 0;
$cookieVersion = '';
$cookieData = array();
// SESSION is preferred over the COOKIE
if (isset($_SESSION[self::STORAGE_ID])) {
list($sessionVersion, $sessionData) = unserialize($_SESSION[self::STORAGE_ID]);
// we check if the version is current, before setting extracting the data
// this way if it's old, we won't throw an error for a missing field
if ($sessionVersion === self::CART_VERSION) {
list($sessionProducts, $sessionCartTotal, $sessionTransactionId, $sessionTime) = $sessionData;
} else {
// if the session is not the current cart version, we destroy it
unset($_SESSION[self::STORAGE_ID]);
}
}
// Now we do the same for the cookie
if (isset($_COOKIE[self::STORAGE_ID])) {
list($cookieVersion, $cookieData) = unserialize($_COOKIE[self::STORAGE_ID]);
if ($sessionVersion === self::CART_VERSION) {
// Get cart from the cookies
list($cookieProducts, $cookieCartTotal, $cookieTransactionId, $cookieTime) = $cookieData;
} else {
// if the cookie is not the current cart version, we destroy it
unset($_COOKIE[self::STORAGE_ID]);
}
}
// Check which is newer; the session, or the cookie
if ($cookieTime < $sessionTime) {
// If session is newer, then we set the cart properties from the session
$this->_products = $sessionProducts;
$this->_cartTotal = $sessionCartTotal;
$this->_transactionId = $sessionTransactionId;
$this->_lastUpdated = $sessionTime;
} else {
if (!!$cookieTime) {
// otherwise, we set the cart to the cookie vars
$this->_products = $cookieProducts;
$this->_cartTotal = $cookieCartTotal;
$this->_transactionId = $cookieTransactionId;
$this->_lastUpdated = $cookieTime;
}
}
// We run through all the products in the cart and load the info
foreach ($this->_products as $pID => $vID) {
$newProduct = local_moodec_get_product($pID);
// If any product is variable, but the variation ID is stored as 0
// That means the product WAS simple, but has been changed.
// Therefore we clear the cart, as this could cause errors.
if ($newProduct->get_type() === PRODUCT_TYPE_VARIABLE && $vID === 0) {
$this->clear();
break;
}
}
// When we create the cart, check if there is a transaction associated with it,
// and if there is, check if it is complete.
// If the transaction is complete, then this cart has been purchased,
// so we need to clear it.
if (!!$this->get_transaction_id()) {
try {
$transaction = new MoodecTransaction($this->get_transaction_id());
if ($transaction->get_status() === MoodecTransaction::STATUS_COMPLETE) {
$this->clear();
}
} catch (Exception $e) {
// If there is an exception, then we want to clear the transaction
// so we will be given a new one
$this->_transactionId = null;
$this->clear();
}
}
}
/**
* This function is called for each data row to allow processing of the
* purchase_date value.
*
* @param object $values Contains object with all the values of record.
* @return $string Return status formatted like as per the transaction class
*/
function col_status($values)
{
$t = new MoodecTransaction((int) $values->id);
return $t->get_status(true);
}
