protected function update_visibility( &$product, $force = false ) {
		$changes = $product->get_changes();

		if ( $force || array_intersect( array( 'featured', 'stock_status', 'average_rating', 'catalog_visibility' ), array_keys( $changes ) ) ) {
			$terms = array();

			if ( $product->get_featured() ) {
				$terms[] = 'featured';
			}

			if ( 'outofstock' === $product->get_stock_status() ) {
				$terms[] = 'outofstock';
			}

			$rating = min( 5, round( $product->get_average_rating(), 0 ) );

			if ( $rating > 0 ) {
				$terms[] = 'rated-' . $rating;
			}

			switch ( $product->get_catalog_visibility() ) {
				case 'hidden':
					$terms[] = 'exclude-from-search';
					$terms[] = 'exclude-from-catalog';
					break;
				case 'catalog':
					$terms[] = 'exclude-from-search';
					break;
				case 'search':
					$terms[] = 'exclude-from-catalog';
					break;
			}

			if ( ! is_wp_error( wp_set_post_terms( $product->get_id(), $terms, 'product_visibility', false ) ) ) {
				do_action( 'woocommerce_product_set_visibility', $product->get_id(), $product->get_catalog_visibility() );
			}
		}
	}