WooCommerce check and redirect to login before checkout

 add_action('template_redirect','check_if_logged_in');
    function check_if_logged_in()
    {
        $pageid = get_option( 'woocommerce_checkout_page_id' );
        if(!is_user_logged_in() && is_page($pageid))
        {
            $url = add_query_arg(
                'redirect_to',
                get_permalink($pagid),
                site_url('/my-account/') // your my account url
            );
            wp_redirect($url);
            exit;
        }
        if(is_user_logged_in())
        {
        if(is_page(get_option( 'woocommerce_myaccount_page_id' )))
        {
            
            $redirect = $_GET['redirect_to'];
            if (isset($redirect)) {
            echo '<script>window.location.href = "'.$redirect.'";</script>';
            }
    
        }
        }
    }