Exclude out of stock products from apply discounts

Ensure discounts are not applied to out-of-stock products.

add_filter('advanced_woo_discount_rules_filter_passed', function($filter_passed, $rule, $product, $sale_badge, $product_table, $condition_failed) {
    if (is_object($product) && method_exists($product, 'has_enough_stock') && !$product->has_enough_stock(1)) {
        $filter_passed = false;
    }
    return $filter_passed;
}, 100, 6);

add_filter('advanced_woo_discount_rules_exclude_out_of_stock_product_on_sale_page', '__return_true');