Call a function that is in a module from an .tpl file

[artuuuuuuuuuurs]

Hello everyone!
I am trying to add a function to a button that is in an tpl file in an notification module. Thing is that I want to write a function that would delete all products that are in cart. Problem is that I can't really access controller files. (Can do that only trough console). 

[Ress]

You need a front controller, you can add it in a module, make an ajax to that controller, and there delete the products from the cart.