turn off shop when not logged in

I know you can turn off guest checkout but is there a way to stop users accessing producs/wishlist/categories etc unless they are logged in? Effectively making the site content driven unless you are a logged in user?

It can be done. What would be the content output to replace the original one ?

I ended up just hard coding the various call to actions etc to only display if user logged in. The basic site is content driven though with a call to action for a shop. I would usually build the brochure side from scratch with it's own CMS but this particular project was a pre-requisite to only use opencart to that has to manage the content for the brochure side too.