Messaging: Multi-user chat

[nesium]

• Ability to create a channel (ie. a MUC room)
• Ability to retrieve all joined MUC rooms from server (I’m pretty sure there’s a XEP to list bookmarked MUC rooms, which in turn are the ones we should auto-join on startup)
• Ability to exchange messages and view list of participants
• Possibly we should try using MIX rather than MUC, as MUC requires the local JID to explicitly announce its online presence on connection to EACH joined MUC, which is tedious. MIX is probably more of a fit for Slack-like always-joined channels, although I never worked with this XEP. A Prosody module implementing MIX is available — https://xmpp.org/extensions/xep-0369.html

https://prose-im.slack.com/archives/C03GGAZ69GT/p1680630681414739?thread_ts=1680625035.145049&cid=C03GGAZ69GT

[poVoq]

Almost no other XMPP client supports MIX right now and the server side modules are more or less untested as a result.

For compatibility reasons MUC support should really be available for now.