PayPalIPN.php

<?php
/**
 * PayPalIPN controller class.
 *
 * PayPal IPN endpoint, replacement for CiviCRM's 'extern/ipn.php'.
 *
 * @since 5.25
 */

namespace CiviCRM_WP_REST\Controller;

class PayPalIPN extends Base {

  /**
   * @var string
   * The base route.
   * @since 5.25
   */
  protected $rest_base = 'ipn';

  /**
   * Registers routes.
   *
   * @since 5.25
   */
  public function register_routes() {

    register_rest_route($this->get_namespace(), $this->get_rest_base(), [
      [
        'methods' => \WP_REST_Server::ALLMETHODS,
        'permission_callback' => '__return_true',
        'callback' => [$this, 'get_item'],
      ],
    ]);

  }

  /**
   * Get items.
   *
   * @since 5.25
   *
   * @param WP_REST_Request $request
   */
  public function get_item($request) {

    /**
     * Filter request params.
     *
     * @since 5.25
     *
     * @param array $params
     * @param WP_REST_Request $request
     */
    $params = apply_filters('civi_wp_rest/controller/ipn/params', $request->get_params(), $request);

    if ($request->get_method() == 'GET') {

      // PayPal Standard.
      $paypal_IPN = new \CRM_Core_Payment_PayPalIPN($params);

      // Log notification.
      \Civi::log()->alert('payment_notification processor_name=PayPal_Standard', $params);

    }

    else {

      // PayPal Pro.
      $paypal_IPN = new \CRM_Core_Payment_PayPalProIPN($params);