<?php
/** experimental, use at your own risk, test throughly to not mess up your seo
** uses wpseo_robots from wordpress seo plugin (yoast) to change direct links
** for facet pages with facets in url from index to noindex in robots meta tag
**/
add_filter( 'wpseo_robots', function( $robots ) {
if ( function_exists( 'FWP' ) && ! FWP()->request->is_refresh && !empty( FWP()->request->url_vars ) ) {
return str_replace( 'index', 'noindex', $robots);
}
return $robots;
});