Unlist, index and redirect - WooCommerce Shit

functions.php

<?php 
/**
 * Hide specific prohects 
 * @author Archie M
 *
 */
function piglet_remove_posts_from_home_page( $query ) {

    if( $query->is_main_query() && $query->is_home() ) {
        $query->set( 'post__not_in', array( 1027335, 1027302, 1027259 ) );
    }
	
}
add_action( 'pre_get_posts', 'piglet_remove_posts_from_home_page' );



/**
 * 
 * 
 */
function get_subcategory_terms( $terms, $taxonomies, $args ) {

	$new_terms = array();

	// if a product category and on the shop page
	if ( in_array( 'product_cat', $taxonomies ) && ! is_admin() && is_shop() ) {

		foreach ( $terms as $key => $term ) {

			if ( ! in_array( $term->slug, array( 'groupon' ) ) ) {
				$new_terms[] = $term;
			}

		}

		$terms = $new_terms;
	}

	return $terms;

}
add_filter( 'get_terms', 'get_subcategory_terms', 10, 3 );



/**
 * Hide 'Groupon' anywhere on site but in admin
 * @author Archie M
 * 
 */
function hide_category( $terms ) {
	
	$new_terms = array();
	foreach ( $terms as $term ) {
		if ( $term->slug !== 'groupon' ) {
			$new_terms[] = $term;
		} else if ( $term->taxonomy !== 'product_cat' || is_admin() ) {
			$new_terms[] = $term;
		}
	}
	return $new_terms;

}
add_filter( 'get_terms', 'hide_category', 10, 1 );



/**
 * Redirect 'Groupon' product category to shop page 
 * @author Archie M
 * 
 */
function groupon_template_redirect() {
	
	if ( is_product_category( 'groupon' ) ) {
    //if ( is_product( '/product-category/groupon/' ) ) {
        //$url = site_url( '/product-category/groupon' );
        //wp_safe_redirect( $url, 301 );
        wp_safe_redirect( home_url() . '/piglets-pantry-is-an-award-winning-food-producer-based-in-sussex/' );
        exit();
    }
	
}
add_action( 'template_redirect', 'groupon_template_redirect' );


/**
 * Do not index listed products 
 * @author Archie M
 * 
 */ 
function product_noindex_meta_tags() {
    
	global $product;
    $no_robots_products = array(1027335,1027302,1027259); // list of product ids
    if ( $product && in_array($product->get_id(), $no_robots_products) ) {
        echo '<meta name="robots" content="noindex" />';
    }
	
}
add_action('wp_head', 'product_noindex_meta_tags');