We want to fetch messages from cache only once. For one-on-one chats
this is the case because messages are fetched only in the `initialize`
method.
This used to be the case for MUCs as well, until we added the option
`clear_messages_on_reconnection`.
Now we only fetch messages after the user has entered the MUC.
in which you can set user affiliations and roles.
Also, let getAffiliationList return an Error instead of `null` if you're
not allowed to fetch a particular affiliation list.
Don't remove affiliation for occupants if we weren't allowed to
fetch that particular affiliation list.
Previously, if fetching the list failed, we would return an empty array,
which would imply that the affiliation list is empty and that all
users with the given affiliation should have their affiliations removed.
Instead we now return `null` and properly account for that when setting
affiliations on existing contacts based on the returned member lists.
We don't remove the existing chatboxes and upon refetching they
become stale and get removed (by Backbone) and then the UI for
them becomes unresponsive.
Don't remove cached presences in `afterTearDown` event.
We might reconnect again and resume the session, in which case we need
that data still.
Instead, we remove cached presences when `clearSession` fires, because
then we know we're not reconnecting.
When reconnecting, we don't fetch presences from cache, we still have
them (since we no longer remove them in `afterTearDown`).
When reconnecting and not resuming, we clear the presences from cache,
since we're starting a new session.
* Explicit forwards and backwards paging
* Include upper or lower bound when calling `RSM.prototype.next` or `RSM.prototype.previous`
* Bugfix: Don't override new RSM parameters (caused infinite recursion)
If we've fetched the roster before within this session, then we don't
have to do so again, regardless of whether versioning is supported or
not, otherwise, even if we have a cached roster, we still need to get
the latest one again.
by not logging in automatically when `auto_login` is `false` and we're
using anonymous, external or prebind authentication.
For `authentication` set to `login` the situation is much more
ambiguous, since we don't have a clear distinction between wether we're
restoring a previous session (`keepalive`) or whether we're
automatically setting up a new session (`auto_login`).
So currently if *either* `keepalive` or `auto_login` is `true` and
`authentication` is set to `login`, then Converse will try to log the
user in.
