sku based discount bar (variable product)

Display a discount bar based on SKU for variable products.

add_filter('advanced_woo_discount_rules_check_sku_filter', function($product_sku, $product, $operation_values, $operation_method, $sale_badge){
	
	if(class_exists('\Wdr\App\Helpers\Woocommerce') && $sale_badge){ 
		$available_variations = \Wdr\App\Helpers\Woocommerce::availableProductVariations($product);
		$result = false;
		if(!empty($available_variations)){
			foreach($available_variations as $variation_values ){
				$variation_id = isset($variation_values['variation_id']) ? $variation_values['variation_id'] : 0;
				if(!empty($variation_id)){
					$product_variation = \Wdr\App\Helpers\Woocommerce::getProduct($variation_id);
					$product_sku = \Wdr\App\Helpers\Woocommerce::getProductSku($product_variation);
					if ('in_list' === $operation_method) {
						$result = (in_array($product_sku, $operation_values));
					} elseif ('not_in_list' === $operation_method) {
						$result = !(in_array($product_sku, $operation_values));
					}
					if($result){
						return true;
					}
				}
			}
		}
	}
	return $product_sku;
}, 10, 5);