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<?php /** * Class WC_Payments_Duplicate_Payment_Prevention_Service * * @package WooCommerce\Payments / namespace WCPay; use Exception; use WC_Order; use WC_Payment_Gateway_WCPay; use WC_Payments_Order_Service; use WCPay\Constants\Intent_Status; use WCPay\Core\Server\Request\Get_Intention; if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly. } /* * Used for methods, which detect existing payments or payment intents, * and prevent creating duplicate payments. / class Duplicate_Payment_Prevention_Service { /* * Key name for saving the current processing order_id to WC Session with the purpose * of preventing duplicate payments in a single order. * * @type string / const SESSION_KEY_PROCESSING_ORDER = 'wcpay_processing_order'; /* * Flag to indicate that a previous order with the same cart content has already paid. * * @type string / const FLAG_PREVIOUS_ORDER_PAID = 'wcpay_paid_for_previous_order'; /* * Flag to indicate that a previous intention attached to the order was successful. / const FLAG_PREVIOUS_SUCCESSFUL_INTENT = 'wcpay_previous_successful_intent'; /* * WC_Payments_Order_Service instance. * * @var WC_Payments_Order_Service / protected $order_service; /* * Gateway instance. * * @var WC_Payment_Gateway_WCPay / protected $gateway; /* * Initializes all dependencies and hooks, related to the service. * * @param WC_Payment_Gateway_WCPay $gateway The main gateway. * @param WC_Payments_Order_Service $order_service The order service instance. / public function init( WC_Payment_Gateway_WCPay $gateway, WC_Payments_Order_Service $order_service ) { $this->gateway = $gateway; $this->order_service = $order_service; } /* * Checks if the attached payment intent was successful for the current order. * * @param WC_Order $order Current order to check. * * @return array\|void A successful response in case the attached intent was successful, null if none. / public function check_payment_intent_attached_to_order_succeeded( WC_Order $order ) { $intent_id = (string) $order->get_meta( '_intent_id', true ); if ( empty( $intent_id ) ) { return; } // We only care about payment intent. $is_payment_intent = 'pi_' === substr( $intent_id, 0, 3 ); if ( ! $is_payment_intent ) { return; } try { $request = Get_Intention::create( $intent_id ); $request->set_hook_args( $order ); /* @var \WC_Payments_API_Abstract_Intention $intent / // phpcs:ignore Generic.Commenting.DocComment.MissingShort $intent = $request->send(); $intent_status = $intent->get_status(); } catch ( Exception $e ) { Logger::error( 'Failed to fetch attached payment intent: ' . $e ); return; } if ( ! $intent->is_authorized() ) { return; } $intent_meta_order_id_raw = $intent->get_metadata()['order_id'] ?? ''; $intent_meta_order_id = is_numeric( $intent_meta_order_id_raw ) ? intval( $intent_meta_order_id_raw ) : 0; $intent_meta_order_number_raw = $intent->get_metadata()['order_number'] ?? ''; $intent_meta_order_number = is_numeric( $intent_meta_order_number_raw ) ? intval( $intent_meta_order_number_raw ) : 0; $paid_on_woopay = filter_var( $intent->get_metadata()['paid_on_woopay'] ?? false, FILTER_VALIDATE_BOOLEAN ); $is_woopay_order = $order->get_id() === $intent_meta_order_number; if ( ! ( $paid_on_woopay && $is_woopay_order ) && $intent_meta_order_id !== $order->get_id() ) { return; } if ( Intent_Status::SUCCEEDED === $intent_status ) { $this->remove_session_processing_order( $order->get_id() ); } $this->order_service->update_order_status_from_intent( $order, $intent ); $return_url = $this->gateway->get_return_url( $order ); $return_url = add_query_arg( self::FLAG_PREVIOUS_SUCCESSFUL_INTENT, 'yes', $return_url ); return [ // nosemgrep: audit.php.wp.security.xss.query-arg -- https://woocommerce.github.io/code-reference/classes/WC-Payment-Gateway.html#method_get_return_url is passed in. 'result' => 'success', 'redirect' => $return_url, ]; } /* * Checks if the current order has the same content with the session processing order, which was already paid (ex. by a webhook). * * @param WC_Order $current_order Current order in process_payment. * * @return array\|void A successful response in case the session processing order was paid, null if none. / public function check_against_session_processing_order( WC_Order $current_order ) { $session_order_id = $this->get_session_processing_order(); if ( null === $session_order_id ) { return; } $session_order = wc_get_order( $session_order_id ); if ( ! is_a( $session_order, 'WC_Order' ) ) { return; } if ( $current_order->get_cart_hash() !== $session_order->get_cart_hash() ) { return; } if ( ! $session_order->has_status( wc_get_is_paid_statuses() ) ) { return; } if ( ! $current_order->has_status( wc_get_is_pending_statuses() ) ) { return; } if ( $session_order->get_id() === $current_order->get_id() ) { return; } if ( $session_order->get_customer_id() !== $current_order->get_customer_id() ) { return; } $session_order->add_order_note( sprintf( / translators: order ID integer number / __( 'WooCommerce Payments: detected and deleted order ID %d, which has duplicate cart content with this order.', 'woocommerce-payments' ), $current_order->get_id() ) ); $current_order->delete(); $this->remove_session_processing_order( $session_order_id ); $return_url = $this->gateway->get_return_url( $session_order ); $return_url = add_query_arg( self::FLAG_PREVIOUS_ORDER_PAID, 'yes', $return_url ); return [ // nosemgrep: audit.php.wp.security.xss.query-arg -- https://woocommerce.github.io/code-reference/classes/WC-Payment-Gateway.html#method_get_return_url is passed in. 'result' => 'success', 'redirect' => $return_url, ]; } /* * Update the processing order ID for the current session. * * @param int $order_id Order ID. * * @return void / public function maybe_update_session_processing_order( int $order_id ) { if ( WC()->session ) { WC()->session->set( self::SESSION_KEY_PROCESSING_ORDER, $order_id ); } } /* * Remove the provided order ID from the current session if it matches with the ID in the session. * * @param int $order_id Order ID to remove from the session. * * @return void / public function remove_session_processing_order( int $order_id ) { $current_session_id = $this->get_session_processing_order(); if ( $order_id === $current_session_id && WC()->session ) { WC()->session->set( self::SESSION_KEY_PROCESSING_ORDER, null ); } } /* * Get the processing order ID for the current session. * * @return integer\|null Order ID. Null if the value is not set. */ protected function get_session_processing_order() { $session = WC()->session; if ( null === $session ) { return null; } $val = $session->get( self::SESSION_KEY_PROCESSING_ORDER ); return null === $val ? null : absint( $val ); } }

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