+-- Iterates over jid, affiliation pairs
+function room_mt:each_affiliation(with_affiliation)
+ if not with_affiliation then
+ return pairs(self._affiliations);
+ else
+ return function(_affiliations, jid)
+ local affiliation;
+ repeat -- Iterate until we get a match
+ jid, affiliation = next(_affiliations, jid);
+ until jid == nil or affiliation == with_affiliation
+ return jid, affiliation;
+ end, self._affiliations, nil
+ end
+end
+