folders interface questions

[Chuck Hagenbuch]

Right now, folders.php allows the user to attempt 2 things that we shouldn't 
allow:

1. Deleting a mailbox that has children
2. Creating a subfolder to a mailbox that can't have children.

Both of these are testable conditions - mailboxes that can't have children will 
be marked with LATT_NOINFERIORS, and so we can safely allow subfolder creation 
if that flag isn't there. And we have a hasChildren() method already.

The question is how to enforce them. I see a few possibilities, and I'm hoping 
that people can improve on them or suggest others:

1. We move delete and create out of the actions menu, and put them as 
links/buttons next to the folders on which they are allowed. Major concern: 
cluttering the UI (though, the folders screen does have a lot of unused space 
right now), and inconsistency between action menu actions and link/button 
actions.

2. We put the checks into the existing javascript logic. Major concern: 
information is being hidden from the user, but acted upon in a way that impacts 
the user directly (in other words, if we're going to do something about the 
information we have, we should probably make it apparent to the user in some 
way).

Other ideas/improvements on these?

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
Entropy. It's what's for dinner.