/*update download wowcommerce replywp.com start */
class replywp_WooCommerce_Legacy_Grant_Download_Permissions
{
    protected static $instance = null;

    private function __construct()
    {
        if (!class_exists('WC_Admin_Post_Types', false)) {
            return;
        }
        remove_action('woocommerce_process_product_file_download_paths', array('WC_Admin_Post_Types', 'process_product_file_download_paths'), 10, 3);
        add_action('woocommerce_process_product_file_download_paths', array($this, 'grant_download_permissions'), 10, 3);
    }

    public static function get_instance()
    {
        if (null === self::$instance) {
            self::$instance = new self;
        }
        return self::$instance;
    }

    public function grant_download_permissions($product_id, $variation_id, $downloadable_files)
    {
        global $wpdb;
        if ($variation_id) {
            $product_id = $variation_id;
        }
        if (!$product = wc_get_product($product_id)) {
            return;
        }

        $existing_download_ids = array_keys((array)$product->get_downloads());
        $updated_download_ids = array_keys((array)$downloadable_files);
        $new_download_ids = array_filter(array_diff($updated_download_ids, $existing_download_ids));
        $removed_download_ids = array_filter(array_diff($existing_download_ids, $updated_download_ids));

        if (!empty($new_download_ids) || !empty($removed_download_ids)) {
            $existing_orders = $wpdb->get_col($wpdb->prepare("SELECT order_id from {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE product_id = %d GROUP BY order_id", $product_id));

            foreach ($existing_orders as $existing_order_id) {
                $order = wc_get_order($existing_order_id);

                if ($order) {
                    if (!empty($removed_download_ids)) {
                        foreach ($removed_download_ids as $download_id) {
                            if (apply_filters('woocommerce_process_product_file_download_paths_remove_access_to_old_file', true, $download_id, $product_id, $order)) {
                                $wpdb->query($wpdb->prepare("DELETE FROM {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE order_id = %d AND product_id = %d AND download_id = %s", $order->get_id(), $product_id, $download_id));
                            }
                        }
                    }
                    if (!empty($new_download_ids)) {
                        foreach ($new_download_ids as $download_id) {
                            if (apply_filters('woocommerce_process_product_file_download_paths_grant_access_to_new_file', true, $download_id, $product_id, $order)) {
                                if (!$wpdb->get_var($wpdb->prepare("SELECT 1=1 FROM {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE order_id = %d AND product_id = %d AND download_id = %s", $order->get_id(), $product_id, $download_id))) {
                                    wc_downloadable_file_permission($download_id, $product_id, $order);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

add_action('admin_init', array('replywp_WooCommerce_Legacy_Grant_Download_Permissions', 'get_instance'));
/*update download wowcommerce replywp.com end */