Sort by in category view

Hello,

Thank you for your job but I have one feature in my mind which should be implemented.

I try to make a fully frontend website, and I want to allow users to sort article in frontend.

Now, it is just set in backend in category settings.

What do you think about it ?

Thank you.

an idea
do a text field with number name order
ordering your category by custom field
select your field and numeric option
its done
regards