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ipn_hss_handler.php
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ipn_hss_handler.php
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<?php
/**
* ipn_hss_handler.php callback handler for PayPal IPN notifications
*
* @package paymentMethod
* @copyright Copyright 2011 OnTechnology Pty Ltd
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
*/
function hss_select_pp_currency() {
if (MODULE_PAYMENT_PAYPALHSS_CURRENCY == 'Selected Currency') {
$my_currency = $_SESSION['currency'];
} else {
$my_currency = substr(MODULE_PAYMENT_PAYPALHSS_CURRENCY, 5);
}
$pp_currencies = array('CAD', 'EUR', 'GBP', 'JPY', 'USD', 'AUD', 'CHF', 'CZK', 'DKK', 'HKD', 'HUF', 'NOK', 'NZD', 'PLN', 'SEK', 'SGD', 'THB', 'MXN', 'ILS', 'PHP', 'TWD', 'BRL', 'MYR');
if (!in_array($my_currency, $pp_currencies)) {
$my_currency = 'USD';
}
return $my_currency;
}
function hss_valid_payment($amount, $currency, $mode = 'IPN') {
global $currencies;
$my_currency = hss_select_pp_currency();
$exchanged_amount = ($mode == 'IPN' ? ($amount * $currencies->get_value($my_currency)) : $amount);
$transaction_amount = preg_replace('/[^0-9.]/', '', number_format($exchanged_amount, $currencies->get_decimal_places($my_currency), '.', ''));
if ( ($_POST['mc_currency'] != $my_currency) || ($_POST['mc_gross'] != $transaction_amount && $_POST['mc_gross'] != -0.01) && MODULE_PAYMENT_PAYPALHSS_SERVER != 'sandbox' ) {
ipn_debug_email('IPN WARNING :: Currency/Amount Mismatch. Details: ' . "\n" . 'PayPal email address = ' . $_POST['business'] . "\n" . ' | mc_currency = ' . $_POST['mc_currency'] . "\n" . ' | submitted_currency = ' . $my_currency . "\n" . ' | order_currency = ' . $currency . "\n" . ' | mc_gross = ' . $_POST['mc_gross'] . "\n" . ' | converted_amount = ' . $transaction_amount . "\n" . ' | order_amount = ' . $amount );
return false;
}
ipn_debug_email('IPN INFO :: Currency/Amount Details: ' . "\n" . 'PayPal email address = ' . $_POST['business'] . "\n" . ' | mc_currency = ' . $_POST['mc_currency'] . "\n" . ' | submitted_currency = ' . $my_currency . "\n" . ' | order_currency = ' . $currency . "\n" . ' | mc_gross = ' . $_POST['mc_gross'] . "\n" . ' | converted_amount = ' . $transaction_amount . "\n" . ' | order_amount = ' . $amount );
return true;
}
/**
* detect odd cases of extra-url-encoded POST data coming back from PayPal
*/
foreach(array('receiver_email', 'payer_email', 'business', 'txn_type', 'transaction_subject', 'custom', 'payment_date', 'item_number', 'item_name', 'first_name', 'last_name') as $key) {
if (isset($_POST[$key]) && strstr($_POST[$key], '%')) {
$_POST[$key] = urldecode($_POST[$key]);
}
}
/**
* detect type of transaction
*/
$isECtransaction = ((isset($_POST['txn_type']) && $_POST['txn_type']=='express_checkout') || (isset($_POST['custom']) && in_array(substr($_POST['custom'], 0, 3), array('EC-', 'DP-', 'WPP')))); /*|| $_POST['txn_type']=='cart'*/
$isDPtransaction = (isset($_POST['custom']) && in_array(substr($_POST['custom'], 0, 3), array('DP-', 'WPP')));
/**
* set paypal-specific application_top parameters
*/
$current_page_base = 'paypalipn';
$loaderPrefix = 'paypal_ipn';
$show_all_errors = FALSE;
require('includes/application_top.php');
$extraDebug = (defined('IPN_EXTRA_DEBUG_DETAILS') && IPN_EXTRA_DEBUG_DETAILS == 'All');
ipn_debug_email('Breakpoint: Flag Status:' . "\nisECtransaction = " . (int)$isECtransaction . "\nisDPtransaction = " . (int)$isDPtransaction);
/**
* do confirmation post-back to PayPal and extract the results for subsequent use
*/
$info = ipn_postback();
$new_status = 1;
ipn_debug_email('Breakpoint: 1 - Collected data from PayPal notification');
/**
* validate transaction -- email address, matching txn record, etc
*/
if (!ipn_validate_transaction($info, $_POST, 'IPN') === true) {
if (!$isECtransaction && $_POST['txn_type'] != '') {
ipn_debug_email('IPN FATAL ERROR :: Transaction did not validate. ABORTED.');
die();
}
}
if ($isDPtransaction) {
ipn_debug_email('IPN NOTICE :: This is a Website Payments Pro transaction. The rest of this log file is INFORMATION ONLY, and is not used for real processing.');
}
ipn_debug_email('Breakpoint: 2 - Validated transaction components');
if ($_POST ['exchange_rate'] == '') $_POST [exchange_rate] = 1;
if ($_POST ['num_cart_items'] == '') $_POST [num_cart_items] = 1;
if ($_POST ['settle_amount'] == '') $_POST [settle_amount] = 0;
/**
* is this a sandbox transaction?
*/
if (isset($_POST['test_ipn']) && $_POST['test_ipn'] == 1) {
ipn_debug_email('IPN NOTICE :: Processing SANDBOX transaction.');
}
if (isset($_POST['test_internal']) && $_POST['test_internal'] == 1) {
ipn_debug_email('IPN NOTICE :: Processing INTERNAL TESTING transaction.');
}
if (isset($_POST['pending_reason']) && $_POST['pending_reason'] == 'unilateral') {
ipn_debug_email('*** NOTE: TRANSACTION IS IN *unilateral* STATUS, pending creation of a PayPal account for this receiver_email address.' . "\n" . 'Please create the account, or make sure the PayPal account is *Verified*.');
}
ipn_debug_email('Breakpoint: 3 - Communication method verified');
/**
* Lookup transaction history information in preparation for matching and relevant updates
*/
$lookupData = ipn_lookup_transaction($_POST);
$ordersID = $lookupData['order_id'];
$paypalipnID = $lookupData['paypal_ipn_id'];
$txn_type = $lookupData['txn_type'];
$parentLookup = $txn_type;
ipn_debug_email('Breakpoint: 4 - ' . 'Details: txn_type=' . $txn_type . ' ordersID = '. $ordersID . ' IPN_id=' . $paypalipnID . "\n\n" . ' Relevant data from POST:' . "\n " . 'txn_type = ' . $txn_type . "\n " . 'parent_txn_id = ' . ($_POST['parent_txn_id'] =='' ? 'None' : $_POST['parent_txn_id']) . "\n " . 'txn_id = ' . $_POST['txn_id']. "\n " ."zen_id=".str_replace('zenid=', '', $_POST['custom']));
if (!$isECtransaction && !isset($_POST['parent_txn_id']) && $txn_type != 'cleared-echeck') {
if (defined('MODULE_PAYMENT_PAYPAL_PDTTOKEN') && MODULE_PAYMENT_PAYPAL_PDTTOKEN != '') {
ipn_debug_email('IPN NOTICE :: IPN pausing: waiting for PDT to process. Sleeping 10 seconds ...');
sleep(10);
}
if (ipn_get_stored_session($session_stuff) === false) {
ipn_debug_email('IPN ERROR :: No pending Website Payments Standard session data available. Might be a duplicate transaction already entered via PDT.');
$ipnFoundSession = false;
}
}
if ($ipnFoundSession == FALSE && !$isECtransaction && !$isDPtransaction && $txn_type != 'cleared-echeck') {
ipn_debug_email('NOTICE: IPN Processing Aborted due to missing matching transaction data, as per earlier debug message. Perhaps this transaction was already entered via PDT? Thus there is no need to process this incoming IPN notification.');
die();
}
// this is used to determine whether a record needs insertion. ie: original echeck notice failed, but now we have cleared, so need parent record established:
$new_record_needed = ($txn_type == 'unique' ? true : false);
/**
* evaluate what type of transaction we're processing
*/
$txn_type = ipn_determine_txn_type($_POST, $txn_type);
ipn_debug_email('Breakpoint: 5 - Transaction type (txn_type) = ' . $txn_type . ' [parentLookup='.$parentLookup.']');
if ($_POST['payment_type'] == 'instant' && $isDPtransaction && ((isset($_POST['auth_status']) && $_POST['auth_status'] == 'Completed') || $_POST['payment_status'] == 'Completed')) {
ipn_debug_email('IPN NOTICE :: DP/Website Payments Pro notice -- IPN Ignored');
die();
}
/**
* take action based on transaction type and corresponding requirements
*/
switch ($txn_type) {
case ($_POST['txn_type'] == 'send_money'):
case ($_POST['txn_type'] == 'merch_payment'):
case ($_POST['txn_type'] == 'new_case'):
case ($_POST['txn_type'] == 'masspay'):
// these types are irrelevant to ZC transactions
ipn_debug_email('IPN NOTICE :: Transaction txn_type not relevant to Zen Cart processing. IPN handler aborted.' . $_POST['txn_type']);
die();
break;
case (substr($_POST['txn_type'],0,7) == 'subscr_'):
// For now we filter out subscription payments
ipn_debug_email('IPN NOTICE :: Subscription payment - Not currently supported by Zen Cart. IPN handler aborted.');
die();
break;
case 'pending-unilateral':
// cannot process this order because the merchant's PayPal account isn't valid yet
ipn_debug_email('IPN NOTICE :: Please create a valid PayPal account and follow the steps to *Verify* it. IPN handler aborted.');
die();
break;
case 'pending-address':
case 'pending-intl':
case 'pending-multicurrency':
case 'pending-verify':
if (!$isECtransaction) {
ipn_debug_email('IPN NOTICE :: '.$txn_type.' transaction -- inserting initial record for reference purposes');
$sql_data_array = ipn_create_order_array($ordersID, $txn_type);
zen_db_perform(TABLE_PAYPAL, $sql_data_array);
$sql_data_array = ipn_create_order_history_array($paypalipnID);
zen_db_perform(TABLE_PAYPAL_PAYMENT_STATUS_HISTORY, $sql_data_array);
die();
break;
}
case (($txn_type == 'express_checkout' || $isECtransaction) && !strstr($txn_type, 'cleared') && $parentLookup != 'parent'):
if ($_POST['payment_status'] == 'Completed') {
// This is an express-checkout transaction -- IPN may not be needed
if (isset($_POST['auth_status']) && $_POST['auth_status'] == 'Completed') {
ipn_debug_email('IPN NOTICE :: Express Checkout payment notice on completed order -- IPN Ignored');
die();
}
}
if ($_POST['payment_type'] == 'instant' && isset($_POST['auth_status']) && $_POST['auth_status'] == 'Pending') {
ipn_debug_email('IPN NOTICE :: EC/DP notice on pre-auth order -- IPN Ignored');
die();
}
ipn_debug_email('Breakpoint: 5 - midstream checkpoint');
if (!(substr($txn_type,0,8) == 'pending-' && (int)$ordersID <= 0) && !($new_record_needed && $txn_type == 'echeck-cleared') && $txn_type != 'unique' && $txn_type != 'echeck-denied' && $txn_type != 'voided') {
ipn_debug_email('Breakpoint: 5 - Record does not need to be processed since it is not new and is not an update. See earlier notices. Processing aborted.');
break;
}
case ($txn_type == 'cart'):
ipn_debug_email('IPN NOTICE :: This is a detailed-cart transaction');
case ($txn_type == 'cart' && !$isECtransaction):
ipn_debug_email('IPN NOTICE :: This is a detailed-cart transaction (i)');
case (substr($txn_type,0,8) == 'pending-' && (int)$ordersID <= 0):
case ($new_record_needed && $txn_type == 'echeck-cleared'):
case 'unique':
/**
* delete IPN session from PayPal table -- housekeeping
*/
$db->Execute("delete from " . TABLE_PAYPAL_SESSION . " where session_id = '" . zen_db_input(str_replace('zenid=', '', $_POST['custom'])) . "'");
/**
* require shipping class
*/
require(DIR_WS_CLASSES . 'shipping.php');
/**
* require payment class
*/
require(DIR_WS_CLASSES . 'payment.php');
$payment_modules = new payment($_SESSION['payment']);
$shipping_modules = new shipping($_SESSION['shipping']);
/**
* require order class
*/
require(DIR_WS_CLASSES . 'order.php');
$order = new order();
/**
* require order_total class
*/
require(DIR_WS_CLASSES . 'order_total.php');
$order_total_modules = new order_total();
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_BEFORE_ORDER_TOTALS_PROCESS');
$order_totals = $order_total_modules->process();
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_TOTALS_PROCESS');
if (hss_valid_payment($order->info['total'], $_SESSION['currency']) === false && !$isECtransaction && !$isDPtransaction) {
ipn_debug_email('IPN NOTICE :: Failed because of currency mismatch.');
die();
}
if ($ipnFoundSession === false && !$isECtransaction && !$isDPtransaction) {
ipn_debug_email('IPN NOTICE :: Unique but no session - Assumed to be a personal payment, rather than a new Website Payments Standard transaction. Ignoring.');
die();
}
if (!strstr($txn_type, 'denied') && !strstr($txn_type, 'failed') && !strstr($txn_type, 'voided')) {
$insert_id = $order->create($order_totals);
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE');
ipn_debug_email('Breakpoint: 5a - built order -- OID: ' . $insert_id);
$sql_data_array = ipn_create_order_array($insert_id, $txn_type);
ipn_debug_email('Breakpoint: 5b - PP table OID: ' . print_r($sql_data_array, true));
zen_db_perform(TABLE_PAYPAL, $sql_data_array);
ipn_debug_email('Breakpoint: 5c - PP table OID saved');
$pp_hist_id = $db->Insert_ID();
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_PAYMENT_MODULES_AFTER_ORDER_CREATE');
ipn_debug_email('Breakpoint: 5d - PP hist ID: ' . $pp_hist_id);
$sql_data_array = ipn_create_order_history_array($pp_hist_id);
ipn_debug_email('Breakpoint: 5e - PP hist_data:' . print_r($sql_data_array, true));
zen_db_perform(TABLE_PAYPAL_PAYMENT_STATUS_HISTORY, $sql_data_array);
ipn_debug_email('Breakpoint: 5f - PP hist saved');
$new_status = MODULE_PAYMENT_PAYPALHSS_ORDER_STATUS_ID;
ipn_debug_email('Breakpoint: 5g - new status code: ' . $new_status);
$sql_data_array = array('orders_id' => (int)$insert_id,
'orders_status_id' => (int)$new_status,
'date_added' => 'now()',
'comments' => 'PayPal status: ' . $_POST['payment_status'] . ' ' . $_POST['pending_reason']. ' @ '.$_POST['payment_date'] . (($_POST['parent_txn_id'] !='') ? "\n" . ' Parent Trans ID:' . $_POST['parent_txn_id'] : '') . "\n" . ' Trans ID:' . $_POST['txn_id'] . "\n" . ' Amount: ' . $_POST['mc_gross'] . ' ' . $_POST['mc_currency'],
'customer_notified' => 0
);
ipn_debug_email('Breakpoint: 5j - order stat hist update:' . print_r($sql_data_array, true));
zen_db_perform(TABLE_ORDERS_STATUS_HISTORY, $sql_data_array);
zen_db_perform(TABLE_ORDERS_STATUS_HISTORY, $sql_data_array);
ipn_debug_email('Breakpoint: 5k - OSH update done');
$order->create_add_products($insert_id, 2);
ipn_debug_email('Breakpoint: 5L - adding products');
$_SESSION['order_number_created'] = $insert_id;
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE_ADD_PRODUCTS');
$order->send_order_email($insert_id, 2);
ipn_debug_email('Breakpoint: 5m - emailing customer');
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_SEND_ORDER_EMAIL');
/** Prepare sales-tracking data for use by notifier class **/
$ototal = $order_subtotal = $credits_applied = 0;
for ($i=0, $n=sizeof($order_totals); $i<$n; $i++) {
if ($order_totals[$i]['code'] == 'ot_subtotal') $order_subtotal = $order_totals[$i]['value'];
if ($$order_totals[$i]['code']->credit_class == true) $credits_applied += $order_totals[$i]['value'];
if ($order_totals[$i]['code'] == 'ot_total') $ototal = $order_totals[$i]['value'];
}
$commissionable_order = ($order_subtotal - $credits_applied);
$commissionable_order_formatted = $currencies->format($commissionable_order);
$_SESSION['order_summary']['order_number'] = $insert_id;
$_SESSION['order_summary']['order_subtotal'] = $order_subtotal;
$_SESSION['order_summary']['credits_applied'] = $credits_applied;
$_SESSION['order_summary']['order_total'] = $ototal;
$_SESSION['order_summary']['commissionable_order'] = $commissionable_order;
$_SESSION['order_summary']['commissionable_order_formatted'] = $commissionable_order_formatted;
$_SESSION['order_summary']['coupon_code'] = $order->info['coupon_code'];
$zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_HANDLE_AFFILIATES', 'paypalipn');
$_SESSION['cart']->reset(true);
ipn_debug_email('Breakpoint: 5n - emptying cart');
$ordersID = $insert_id;
$paypalipnID = $pp_hist_id;
ipn_debug_email('Breakpoint: 6 - Completed IPN order add.' . ' ordersID = '. $ordersID . ' IPN tracking record = ' . $paypalipnID);
if (!($new_record_needed && $txn_type == 'echeck-cleared')) break;
}
case 'parent':
case 'cleared-address':
case 'cleared-multicurrency':
case 'cleared-echeck':
case 'cleared-authorization':
case 'cleared-verify':
case 'cleared-intl':
case 'cleared-review':
case 'echeck-denied':
case 'echeck-cleared':
case 'denied-address':
case 'denied-multicurrency':
case 'denied-echeck':
case 'failed-echeck':
case 'denied-intl':
case 'denied':
case 'voided':
case 'express-checkout-cleared':
case 'web_accept':
case 'pro_hosted':
ipn_debug_email('IPN NOTICE :: Storing order/update details for order #' . $ordersID . ' txn_id: ' . $_POST['txn_id'] . ' PP IPN ID: ' . $paypalipnID);
if ($txn_type == 'parent') {
$sql_data_array = ipn_create_order_array($ordersID, $txn_type);
zen_db_perform(TABLE_PAYPAL, $sql_data_array);
$paypalipnID = $db->Insert_ID();
} else {
$sql_data_array = ipn_create_order_update_array($txn_type);
zen_db_perform(TABLE_PAYPAL, $sql_data_array, 'update', "txn_id='" . ($txn_type == 'cleared-authorization' ? $_POST['parent_txn_id'] : $_POST['txn_id']) . "'");
$sql = "select paypal_ipn_id from " . TABLE_PAYPAL . " where txn_id='" . $_POST['txn_id'] . "'";
$result = $db->Execute($sql);
$paypalipnID = $result->fields['paypal_ipn_id'];
}
$sql_data_array = ipn_create_order_history_array($paypalipnID);
zen_db_perform(TABLE_PAYPAL_PAYMENT_STATUS_HISTORY, $sql_data_array);
ipn_debug_email('IPN NOTICE :: Added PP status-history record for order #' . $ordersID . ' txn_id: ' . $_POST['txn_id'] . ' (updated/child) PP IPN ID: ' . $paypalipnID);
switch ($txn_type) {
case 'voided':
case ($_POST['payment_status'] == 'Refunded' || $_POST['payment_status'] == 'Reversed' || $_POST['payment_status'] == 'Voided'):
//payment_status=Refunded or payment_status=Voided
break;
case 'echeck-denied':
case 'denied-echeck':
case 'failed-echeck':
//payment_status=Denied or failed
break;
case 'echeck-cleared':
$new_status = (defined('MODULE_PAYMENT_PAYPALHSS_ORDER_STATUS_ID') ? MODULE_PAYMENT_PAYPALHSS_ORDER_STATUS_ID : 2);
break;
case ($txn_type=='express-checkout-cleared' || substr($txn_type,0,8) == 'cleared-'):
//express-checkout-cleared
$new_status = ($isECtransaction && defined('MODULE_PAYMENT_PAYPALHSS_ORDER_STATUS_ID') ? MODULE_PAYMENT_PAYPALHSS_ORDER_STATUS_ID : MODULE_PAYMENT_PAYPAL_ORDER_STATUS_ID);
if ((int)$new_status == 0) $new_status = 2;
break;
case 'pending-auth':
// pending authorization
break;
case (substr($txn_type,0,7) == 'denied-'):
// denied for any other reason - treat as pending for now
case (substr($txn_type,0,8) == 'pending-'):
// pending anything
break;
}
// update order status history with new information
ipn_debug_email('IPN NOTICE :: Set new status ' . $new_status . " for order ID = " . $ordersID . ($_POST['pending_reason'] != '' ? '. Reason_code = ' . $_POST['pending_reason'] : '') );
if ((int)$new_status == 0) $new_status = 1;
if (in_array($_POST['payment_status'], array('Refunded', 'Reversed', 'Denied', 'Failed'))
|| substr($txn_type,0,8) == 'cleared-' || $txn_type=='echeck-cleared' || $txn_type == 'express-checkout-cleared') {
ipn_update_orders_status_and_history($ordersID, $new_status, $txn_type);
$zco_notifier->notify('NOTIFY_PAYPALIPN_STATUS_HISTORY_UPDATE', array($ordersID, $new_status, $txn_type));
}
break;
default:
// can't understand result found. Thus, logging and aborting.
ipn_debug_email('IPN WARNING :: Could not process for txn type: ' . $txn_type . "\n" . ' postdata=' . str_replace('&', " \n&", urldecode(print_r($_POST, TRUE))));
}
// debug info only
switch (TRUE) {
case ($txn_type == 'pending-echeck' && (int)$ordersID > 0):
ipn_debug_email('IPN NOTICE :: Pending echeck transaction for existing order. No action required. Waiting for echeck to clear.');
break;
case ($txn_type == 'pending-multicurrency' && (int)$ordersID > 0):
ipn_debug_email('IPN NOTICE :: Pending multicurrency transaction for existing order. No action required. Waiting for merchant to "accept" the order via PayPal account console.');
break;
case ($txn_type == 'pending-address' && (int)$ordersID > 0):
ipn_debug_email('IPN NOTICE :: "Pending address" transaction for existing order. No action required. Waiting for address approval by store owner via PayPal account console.');
break;
case ($txn_type == 'pending-paymentreview' && (int)$ordersID > 0):
ipn_debug_email('IPN NOTICE :: "Pending payment review" transaction for existing order. No action required. Waiting for PayPal to complete their Payment Review. Do not ship order until review is completed.');
break;
}