Custom purchase rules (or Access level exclusions)

-- HikaShop version -- : 2.3.0 Business
-- Joomla version -- : 3.2.3
-- PHP version -- : 5.3.28

Is there any way to set-up 'purchase rules' so that:

Product B
- only displayed to users who have purchased Product A

Product C
- displayed but only available for purchase if user has already purchased Product B OR has it in the cart


If that sort of rule configuration isn't possible, then is there a way to display items to all Access Level groups EXCEPT a certain one?
i.e.
Access Levels:
Public
- Guest
Registered
- Member A
. Member B

How to display a product to a 'Guest' OR 'Registered', but NOT to 'Member A' or 'Member B'
(If I select 'Guest' and 'Registered' those that are in the 'Member A' and 'Member B' groups also see it. And it is not possible, due to other configurations of the site, to move 'Member A' and 'Member B' out of the 'Registered' group)

Yes, I'm aware of that plugin and use it for other needs.
However, that doesn't solve the problem raised here.

I need to display a product to users who have NOT purchase a certain product (i.e. new 'guest' user) but do NOT display it for those who have.

There's no way to do this within the present ACL restriction system.

See the 2nd part of my original question.

If we had some more 'robust' ACL checking (i.e. NOT, OR, etc.) then this would work.

I'm guessing that this just isn't possible right now ?



BTW ... here's the present use-case:

3 Products:
- New Subscription
- Renew Subscription
- New Lifetime Subscription
- Upgrade to Lifetime Subscription

How to make it possible that:
- the 'New Subscription' is only displayed to users who have never purchased a subscription before (or who aren't logged in)
- the 'Renew Subscription' is only displayed to users who have purchased the 'New Subscription' OR 'Renew Subscription' (but not 'Lifetime Subscription")
- the New Lifetime Subscription is visible only to users who have never purchased a subscription before (or who aren't logged in)
- the Upgrade to Lifetime Subscription is visible only to those who have purchased a New Subscription or a Renew Subscription

As this is probably a common configuration (esp. for those who sell subscription-based items) it would be great to have a good solution that works and displays the correct items to the correct people.