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thelounge/client
Max Leiter 78cadc5ff1 ircv3: monitor and extended-monitor (#5045)
Updated version of #4550. Closes #337, closes #872 (#337 can't be fully
addressed — tracking nick changes isn't really possible atm).

<img width="253" height="149" alt="image"
src="https://github.com/user-attachments/assets/8a961868-0aa9-406b-92e2-f9d4858e2d0d"
/>

Away support:
<img width="214" alt="image"
src="https://user-images.githubusercontent.com/8675906/165882385-6f928c8e-5a0b-4502-8bd3-3cd0bd70e0e0.png">

## Summary

Query windows show whether the person behind them is online, and whether
they are away, using
[MONITOR](https://ircv3.net/specs/extensions/monitor) rather than
polling. `Network` keeps the monitor list: queries are registered in
batched `MONITOR +` commands once RPL_ISUPPORT tells us the server
supports it, and one at a time as new query windows open. The limit
advertised in `MONITOR=<n>` is respected, with anything over it waiting
for a slot; `MONITOR=0` means no monitoring at all, a bare `MONITOR`
means no limit. A nick change on a monitored query swaps the target in
place so the query keeps its slot.

[extended-monitor](https://ircv3.net/specs/extensions/extended-monitor)
is requested too, so away, nick, account and chghost updates arrive for
monitored nicks we share no channel with. Away state for people we do
share a channel with comes from a WHO on join.

The indicator is a dot on the query in the sidebar and next to the nick
in the message bubble, with a tooltip and an `img` role so it isn't
colour-only, and it can be turned off under Appearance.

Known limitation: a server that enforces a monitor limit it doesn't
advertise will reject part of a batch with `ERR_MONLISTFULL`; the user
gets a message in the lobby, but the client's own list isn't reconciled
until reconnect.

## Test Plan

- Unit tests for the monitor list: add, case-insensitive dedupe,
queueing at the limit, removal draining the queue, batching, and the
rename path.
- Ran the server against a local IRCd and watched the wire: opening
queries sends `MONITOR + <nick>` each, a reconnect with four open
queries sends a single `MONITOR + bob,carol,dave,mallory`, 730/731 drive
the online/offline state, a rename sends `MONITOR - bob` then `MONITOR +
bob2`, `MONITOR=0` sends nothing at all, and a bare `MONITOR` behaves as
unlimited.
2026-07-22 09:46:58 -07:00
..
2018-07-17 09:14:58 +03:00
2026-07-20 14:46:02 -07:00
2022-06-18 17:25:21 -07:00
2022-06-18 17:25:21 -07:00