How to make Coupon code(amount) and gift certificates work only for a certain part of the order value

Greetings!

I just purchased the Awocoupon PRO and would like to know if there is a way to make coupon codes and gift certificates work only for a certain part of the order summ? Same thing goes for balance of the user, that have activated gift certificates?

For example i have a gift certificate that gives 100$ discount to order value. If customer add to cart products worth 50$ and apply gift certificate - total order value would be 0$, but I want the coupon to apply maximum for half of the order(for example). So after applying the gift certificate - total order value should be not 0$, but 25$

I think that would be a very useful function. Thank you for answer!

Will there be such a function in the future or how can i solve this issue myself?

In the field "maximum discount amount", you can enter only the amount, not a percentage of the order sum. Besides, gift certificates with a maximum discount amount and other restrictions, for example, for certain categories - can not be added to the client balance. So gift certificates that were added to client balance would work without restrictions. I need to apply client balance only for certain categories of products and maximum for the 50% of the sums of the value of certain products.

I guess this issue could be solved by changing the program code and adding certain balance application algorithm. In what file the algorithm for applying the vaucher is realised?

In the file awocoupon/library/class-awocoupon-library-discount.php

Thank you. I will try to realise somehow the condition "if the final order discount > 50% of order sum without discount - then make final discount as 50% of order sum" while applying client voucher balance.

(Edit) That's not so easy, that i thought, to realise for client balance with lots of gift certificates activated in balance. As i understand, private function checkdiscount_giftcert() works several time until it uses balance as much as possible.

For example client activated gift1(10$), gift2(5$), gift3(2$). The balance is 17$. He add to cart products worth 16$ and apply the voucher_balance. The awocoupon first of all will apply the gift1 certificate, finding minimum between 16$ and 10$. The minimum is 10 - so applying 10$ discount. In next step it will find the minimum between the remaining order amount (6$) and the second gift2 (5$). The minimum is 5$ - so add one more discount to order. In third step finding the minimum between the remaining order amount (1$) and the third gift3 (2$). The minimum is 1$ - adding to discount.

So i broke my head thinking about how I can limit the amount of applied discounts to half of the order value.

The problem was solved by adding 2 more variables to (Process discount: giftcert) and a condition, that checks at each step the sum of all issued discounts and the discount being prepared for application, and if that sum is > 0.5*order_total - then make the "discount being prepared" less then 0.5*order_total.