Best way to add a 'person' field

[Roger Oberholtzer]

I have the need to add a field for a contact-type person. This person need not be a Trac user. But for now, let's say they are. So they have set up their Trac account and have an e-mail address.

I see that a text field is pretty much what can be offered in a ticket. But that seems rather limited. It means that the person entering this information would need to know the user's login name or e-mail address. It would be so much nicer if a drop-down of users like when you assign a ticket to someone could be provided. I was looking for a plugin for this, but I did not see anything. Also, with a text field, it seems that validation is tricky. How to let the user know that what they have entered is a known user?

Another thing: how to integrate such a field into the announcer (Trac's own built-in one)?

--

Roger Oberholtzer