<?php
/**
* Class WC_Gateway_Paypal_PDT_Handler file.
*
* @package WooCommerce\Gateways
*/
use Automattic\Jetpack\Constants;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
require_once dirname( __FILE__ ) . '/class-wc-gateway-paypal-response.php';
/**
* Handle PDT Responses from PayPal.
*/
class WC_Gateway_Paypal_PDT_Handler extends WC_Gateway_Paypal_Response {
/**
* Identity token for PDT support
*
* @var string
*/
protected $identity_token;
/**
* Constructor.
*
* @param bool $sandbox Whether to use sandbox mode or not.
* @param string $identity_token Identity token for PDT support.
*/
public function __construct( $sandbox = false, $identity_token = '' ) {
add_action( 'woocommerce_thankyou_paypal', array( $this, 'check_response' ) );
$this->identity_token = $identity_token;
$this->sandbox = $sandbox;
}
/**
* Validate a PDT transaction to ensure its authentic.
*
* @param string $transaction TX ID.
* @return bool|array False or result array if successful and valid.
*/
protected function validate_transaction( $transaction ) {
$pdt = array(
'body' => array(
'cmd' => '_notify-synch',
'tx' => $transaction,
'at' => $this->identity_token,
),
'timeout' => 60,
'httpversion' => '1.1',
'user-agent' => 'WooCommerce/' . Constants::get_constant( 'WC_VERSION' ),
);
// Post back to get a response.
$response = wp_safe_remote_post( $this->sandbox ? 'https://www.sandbox.paypal.com/cgi-bin/webscr' : 'https://www.paypal.com/cgi-bin/webscr', $pdt );
if ( is_wp_error( $response ) || strpos( $response['body'], 'SUCCESS' ) !== 0 ) {
return false;
}
// Parse transaction result data.
$transaction_result = array_map( 'wc_clean', array_map( 'urldecode', explode( "\n", $response['body'] ) ) );
$transaction_results = array();
foreach ( $transaction_result as $line ) {
$line = explode( '=', $line );
$transaction_results[ $line[0] ] = isset( $line[1] ) ? $line[1] : '';
}
if ( ! empty( $transaction_results['charset'] ) && function_exists( 'iconv' ) ) {
foreach ( $transaction_results as $key => $value ) {
$transaction_results[ $key ] = iconv( $transaction_results['charset'], 'utf-8', $value );
}
}
return $transaction_results;
}
/**
* Check Response for PDT.
*/
public function check_response() {
if ( empty( $_REQUEST['cm'] ) || empty( $_REQUEST['tx'] ) || empty( $_REQUEST['st'] ) ) { // WPCS: Input var ok, CSRF ok, sanitization ok.
return;
}
$order_id = wc_clean( wp_unslash( $_REQUEST['cm'] ) ); // WPCS: input var ok, CSRF ok, sanitization ok.
$status = wc_clean( strtolower( wp_unslash( $_REQUEST['st'] ) ) ); // WPCS: input var ok, CSRF ok, sanitization ok.
$amount = isset( $_REQUEST['amt'] ) ? wc_clean( wp_unslash( $_REQUEST['amt'] ) ) : 0; // WPCS: input var ok, CSRF ok, sanitization ok.
$transaction = wc_clean( wp_unslash( $_REQUEST['tx'] ) ); // WPCS: input var ok, CSRF ok, sanitization ok.
$order = $this->get_paypal_order( $order_id );
if ( ! $order || ! $order->needs_payment() ) {
return false;
}
$transaction_result = $this->validate_transaction( $transaction );
if ( $transaction_result ) {
WC_Gateway_Paypal::log( 'PDT Transaction Status: ' . wc_print_r( $status, true ) );
$order->add_meta_data( '_paypal_status', $status );
$order->set_transaction_id( $transaction );
if ( 'completed' === $status ) {
if ( number_format( $order->get_total(), 2, '.', '' ) !== number_format( $amount, 2, '.', '' ) ) {
WC_Gateway_Paypal::log( 'Payment error: Amounts do not match (amt ' . $amount . ')', 'error' );
/* translators: 1: Payment amount */
$this->payment_on_hold( $order, sprintf( __( 'Validation error: PayPal amounts do not match (amt %s).', 'woocommerce' ), $amount ) );
} else {
// Log paypal transaction fee and payment type.
if ( ! empty( $transaction_result['mc_fee'] ) ) {
$order->add_meta_data( 'PayPal Transaction Fee', wc_clean( $transaction_result['mc_fee'] ) );
}
if ( ! empty( $transaction_result['payment_type'] ) ) {
$order->add_meta_data( 'Payment type', wc_clean( $transaction_result['payment_type'] ) );
}
$this->payment_complete( $order, $transaction, __( 'PDT payment completed', 'woocommerce' ) );
}
} else {
if ( 'authorization' === $transaction_result['pending_reason'] ) {
$this->payment_on_hold( $order, __( 'Payment authorized. Change payment status to processing or complete to capture funds.', 'woocommerce' ) );
} else {
/* translators: 1: Pending reason */
$this->payment_on_hold( $order, sprintf( __( 'Payment pending (%s).', 'woocommerce' ), $transaction_result['pending_reason'] ) );
}
}
} else {
WC_Gateway_Paypal::log( 'Received invalid response from PayPal PDT' );
}
}
}