Jeg Font Preview - WooCommerce || Shortcode for JFP WooCommerce preview

/**
 * Shortcode for JFP WooCommerce preview.
 *
 * Usage: [jfp_wc_preview id="PRODUCT_ID"]
 *
 * @author Fauzan Edris
 * @link https://www.linkedin.com/in/fauzanedris/
 */
add_shortcode( 'jfp_wc_preview', function( $atts ) {
    $atts = shortcode_atts( array(
        'id' => 0,
    ), $atts );

    $product_id = (int) $atts['id'];

    if ( ! $product_id ) {
        return 'Product ID is required.';
    }

    if ( ! function_exists( 'jfp_woocommerce_preview_is_active' ) ) {
        return 'The JFP WooCommerce plugin is not active.';
    }

    if ( ! jfp_woocommerce_preview_is_active( $product_id ) ) {
        return 'Preview is not enabled for this product.';
    }

    $single = new \JFP_WOOCOMMERCE\Single\Single_Post();
    return $single->render_preview( '', $product_id );
});