select product when redirect to create coupon page.

Hi.
i have a scenario which needed to implement this:
i want when redirect to a create coupon page, auto fill the product field. for example i create 3 button; create coupon for product 1,create coupon for product 2,create coupon for product 3
when user click on the first button, open "create coupon page" and auto selected product 1 in the Product field. how to do that?
is it need write plugin?
if i want implement that in the hikamarket create coupon menu, need customize any php file? maybe i can override and get some queryparam in that php file of create coupon:
public_html/templates/********/html/com_hikamarket/discountmarket/show.php

Hello,

I'm sorry but I don't understand your need nor your workflow.

The template override and the plugin triggers allows you to do lots of things ; but you need to select the right triggers and the right templates.
And there is still the last solution of creating your own "controller" via plugin to have specific workflows.

Regards,