Hah. Nice. 
Good to know basic auth will be implemented.
Great. Will take a look.
One way is also doing something like this with custom logic
Having custom logic handlers be called possibly twice
- pre-data-fetch and
- post-data-fetch
See image below.
Obviously overhead may be high but if it can be simplified some way, as @rlmh suggested, it may make things easy.
My diagram is a simplified just to explain things, actual implementation would need to be different to avoid high overhead. But I am guessing this would meet a lot of needs for data massaging and custom business logic.
Another question: Is this custom logic module an enterprise only feature?