To get the total discount amount applied through price rules in cart

To get the total discount amount applied through price rules in cart

if(class_exists('\Wdr\App\Router')) {
    $total_discount = 0;
    $manage_discount = \Wdr\App\Router::$manage_discount;
    if(method_exists($manage_discount, 'getDiscountPerItem')){
        if (!empty($manage_discount::$calculated_cart_item_discount)) {
            
            foreach ($manage_discount::$calculated_cart_item_discount as $discount_details) {
                if (!empty($discount_details)) {
                    $total_discount += $manage_discount->getDiscountPerItem($discount_details);
                }
            }
        }
    }
    //$total_discount Here you gets total discount applied in cart
}