XMPP strophe, get presence roster

Question

How can I get a the online presence of my "friends" using Strophe lib for JS? Not the roster, even the single presence ( or have I to do 1 req/user in roster? ) Usually I'm notified only at 'presence change' of every resource, but I want to know if a USER is online or offline ( like Pidgin ), without thinking about the many resources logged of each user that can be online simultanealy.

Answer 1

consider all users as offline by default. For all online user resources you get a presence notification automatically. You get all presence changes, and you get the initial after login for all your online contacts.