Handle products and product in categories that can not be sold or shipped with anything else

function.php

/**
 * Description: Handle products and product in categories that can not be sold or shipped with anything else
 */

 add_filter( 'woocommerce_add_to_cart_validation', 'wc_add_to_cart_validation_filter_callback', 10, 3 );
 function wc_add_to_cart_validation_filter_callback( $passed, $product_id, $quantity ) {
     if( WC()->cart->is_empty() )
         return $passed;
 
     // List of product Ids that can not be sold with anything else
     $products_can_not_be_sold_with_anything_else = array(53048);
     // List of categories that can not be sold with anything else
     $categories_can_not_be_sold_with_anything_else = array(
         'chukar', 
         'quick-chicks',
         'game-birds',
         'pheasants',
         'hatching-eggs',
         'special-deals',
         'started-pullets',
         '15-20-week-old-started-pullets',
         'supplies', 'chick-supplies', 
         'coop-supplies', 
         'shipping-supplies', 
         'feeders-waterers', 
         'gift-cards', 
         'health-wellness'
     );
 
 
     
     // Loop through cart items
     foreach( WC()->cart->get_cart() as $cart_item ) {
 
         // Check on category level
 
         // Check the product that I need to add if it can not be purashed with anything else
         if (has_term( $categories_can_not_be_sold_with_anything_else, 'product_cat', $product_id )) {
             wc_add_notice(
                 sprintf(
                     __("This product cannot be purchased together with anything else.")
                 ), 'error');
             return false;
         }
 
         // check if cart contain a product that can not be purashed with anything else
         else if (has_term( $categories_can_not_be_sold_with_anything_else, 'product_cat', $cart_item['product_id'] )) {
             wc_add_notice(
                 sprintf(
                     __("This product cannot be purchased together with %s."),
                     '"<strong>' . $cart_item['data']->get_name() . '</strong>"'
                 ), 'error');
             return false;
         }
 
         // Check on product level
 
         foreach ($products_can_not_be_sold_with_anything_else as $product_can_not_be_sold) {
             // Check the product that I need to add can not be purashed with anything else
             if ($product_id == $product_can_not_be_sold) {
                 wc_add_notice(
                     sprintf(
                         __("This product cannot be purchased together with anything else.")
                     ), 'error');
                 return false;
             }
 
             // check if cart contain a product that can not be purashed with anything else
             else if ($cart_item['product_id'] == $product_can_not_be_sold) {
                 wc_add_notice(
                     sprintf(
                         __("This product cannot be purchased together with %s."),
                         '"<strong>' . $cart_item['data']->get_name() . '</strong>"'
                     ), 'error');
                 return false;
             }
         }
         
     }
 
     return $passed;
 }