管理有条件的优惠券和购物车/结账Woocommerce的额外费用

我在购物车和结帐页面上管理当前不同的优惠券和自定义附加字段时遇到问题 .

我创建了一个功能，只有当购物车中存在超过变化的商品并且折扣仅应用于第二个（或第三个）变体而不是第一个变体时，才会添加折扣 . 你可以在这里找到我的最终代码Woocommerce conditional part cart discount on the same product present with > 1 variation

但是我不得不继续前进，因为我有一个特别棘手的情况 . 通常，当购物车中的其他折扣（即标准折扣券）时，不能应用上述条件 . 因此，我在购物后立即添加了这两行

$has_coupons = count(WC()->cart->applied_coupons)>0?true:false;

    if(!$has_coupons) {
    //here goes the function that I did
    } else return;

一切都很好，而且很有效 . 然而，在某种特殊情况下，我必须将优惠券应用于购物车（而非％），这会减损整个购物车的特定金额 . 这个特定的优惠券可以与我写的功能中创建的折扣一起使用！

/* get coupon code*/
function get_coupon_code() {
    global $woocommerce;
    if ( !empty( $woocommerce->cart->applied_coupons ) ) {
         $my_coupon_code = $woocommerce->cart->get_coupons() ;
         foreach($my_coupon_code as $coupon){

            if ( $post = get_post( $coupon->id ) ) {
                    $coupon_code= $coupon->code;
            }
        }
    }
    return $coupon_code;
}  
  /* get coupon amount*/
function get_coupon_amount() {
    global $woocommerce;
    if ( ! empty( $woocommerce->cart->applied_coupons ) ) {
         $my_coupon_amount = $woocommerce->cart->get_coupons() ;
         foreach($my_coupon_amount as $coupon){
                        $coupon_amount =$coupon->coupon_amount;
        }
    }
    return $coupon_amount;
} 

function cart_discount() {

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;
    global $woocommerce;
    //get the code and amount of the coupon applied
    $coupon_code =  get_coupon_code();
    $coupon_amount = get_coupon_amount();
    //check if the code corresponds to the coupon exception I want to accept 
    if ($coupon_code == 'wa-1'){
        //if it is the code I need to apply, then I remove it from the cart
        WC()->cart->remove_coupon($coupon_code);
          //I use the amount to add it as additional fee at negative 
          $coupon_discount = -($coupon_amount);
          //I add the ex-coupon amount to an additional field
          $discount_agency_text = __( 'Detracted agency fee', 'woocommerce' );
          WC()->cart->add_fee( $discount_agency_text, $coupon_discount, false );
      }
  //and following the function previously mentioned

      $cart = WC()->cart->get_cart();

      $has_coupons = count(WC()->cart->applied_coupons)>0?true:false;
      //check if there are other coupons or if the coupon applied are the case I want to pass through my function
      if(!$has_coupons || $coupon == 'wa-1')          {

        //here follows the strings to apply a 10% discount on the second (third) variation of the product and not on the first one

            foreach($cart as $cart_item_key => $values) { 
                $product_id = $values['product_id']; // product ID
                $variation_id = $values['variation_id']; // product quantity
                $cart_lines_total = $values["line_total"];
                $cart_lines_quantity = $values["quantity"];

                    //product id to be considered for this discount
                    //$product = 1394 = Spedizioni CSR eng
                    //$product = 1389 = Spedizioni IDP eng
                    //$product = 13888 = Spedizioni CSR ita
                    //$product = 13910 = Spedizioni IDP ita

                if($product_id == '1394' || $product_id == '1389' || $product_id == '13888' || $product_id == '13910')
                {
                    $cart_array []= array( $product_id , $variation_id, $cart_lines_quantity, $cart_lines_total);
                }
            }

                $conteggio = count($cart_array); //counts the number of items in teh cart 
                // percent is 5%
                $percent = -0.10;

            if ($conteggio < 3 && $cart_array[0][0] == $cart_array[1][0])
            { 
                $discount = $percent *  $cart_array[1][3];
                $discount_text = __( '10% discount on subsequent week(s)', 'woocommerce' );
                WC()->cart->add_fee( $discount_text, $discount, false );
            }
            if ($conteggio < 4 && $cart_array[0][0] == $cart_array[1][0] && $cart_array[0][0] == $cart_array[2][0])
            {
                $discount = ($percent * $cart_array[1][3]) + ($percent * $cart_array[2][3]);
                $discount_text = __( '10% discount on subsequent week(s)', 'woocommerce' );
                WC()->cart->add_fee( $discount_text, $discount, false );
            }
            if ($conteggio < 5 && $cart_array[0][0] == $cart_array[1][0] && $cart_array[0][0] == $cart_array[2][0] && $cart_array[0][0] == $cart_array[3][0])
            {
                $discount = ($percent * $cart_array[1][3]) + ($percent * $cart_array[2][3]) + ($percent * $cart_array[3][3]);
                $discount_text = __( '10% discount on subsequent week(s)', 'woocommerce' );
                WC()->cart->add_fee( $discount_text, $discount, false );
            }
        } else return;
}


add_action( 'woocommerce_cart_calculate_fees','cart_discount' );

我遇到的问题是，部分担心折扣优惠券的管理不起作用 . 它获得$ coupon_code和$ coupon_amount，但不会将其添加到其他字段部分 .

有人可以帮帮我吗？