Command to clean empty images (undefined) from products gallery (WooCommerce) after they have been removed from media library

functions.php

// needs to be run via cli with:
// wp cleanup-all-galleries
if (defined('WP_CLI') && WP_CLI) {
    class Cleanup_All_Product_Galleries_Command {
        public function __invoke($args, $assoc_args) {
            $args = array(
                'post_type' => 'product',
                'posts_per_page' => -1, 
                'fields' => 'ids', 
            );

            $product_ids = get_posts($args);

            foreach ($product_ids as $product_id) {
                $product = wc_get_product($product_id);
                if (!$product) continue;

                $gallery_image_ids = $product->get_gallery_image_ids();
                $valid_image_ids = array_filter($gallery_image_ids, 'wp_attachment_is_image');

                if (count($gallery_image_ids) !== count($valid_image_ids)) {
                    $product->set_gallery_image_ids($valid_image_ids);
                    $product->save();
                    WP_CLI::line("Gallery updated for product ID $product_id.");
                }
            }

            WP_CLI::success("Completed updating galleries for all products.");
        }
    }

    WP_CLI::add_command('cleanup-all-galleries', 'Cleanup_All_Product_Galleries_Command');
}