woo discount rules exclude product from discount in specific category using priority id

woo_discount_rules_exclude_product_from_discount.php

add_filter('woo_discount_rules_exclude_product_from_discount', function($return, $product, $id, $rule, $cart_item){
	$priority_id = array(3);  //Enter the priority id for which you need discount. i,e: array(1,2,3)
	$category_id = array(22); //Enter the category id for which you need discount. i,e: array(1,2,3)
	if(in_array($id,$priority_id)){
		if (method_exists($product, 'get_category_ids')) {
			if ($product->is_type('variation')) {
				if (method_exists($product, 'get_parent_id')) {
					$parent_id = $product->get_parent_id();
					if(!empty($parent_id)){
						$product = wc_get_product($parent_id);
					}
				}  
			}
			$product_categories = $product->get_category_ids();
			if(!empty($product_categories) && is_array($product_categories)){
				$is_valid_category = array_intersect($category_id, $product_categories);
				if(empty($is_valid_category)){
					$return = true;
				}
			}
		}
		return $return;
		}
}, 10, 5);