If a message comes in after joining the MUC but before the MAM messages
have been fetched, then converse-mam will query for MAM messages newer
than that message, causing an empty history (except for that one message).
by checking for the affiliation data on the probe response presence and
not on the occupant model (which might be created from a message and
therefore not yet have up to date affiliation data).
It's better to parse an incoming message stanza early, than to have
all kinds of methods throughout the codebase that does querySelector
etc.
Firstly, it allows us to catch and report errors and malicious stanzas early on.
It also simplifies programming because you don't need to try and
remember how to properly parse a stanza, all the work is done upfront
for you.
Also, show topic by creating a message object, instead of directly
inserting HTML into the DOM. This is a necessary precursor to being able
to render chat messages via lit-html/lit-element.
Queue messages and handle them sequentially, each time waiting for promises to
resolve before handling the next message.
Updates #1899, which likely happens because an error message is received
before messages have been fetched.
This will make it easier to add config-based functionality, such as
allowing/showing the `/topic` slash command only to those users who are
allowed to set the subject.
Otherwise we might run into a situation where a very old,
cached MUC that's being restored has `connection_status` set to ENTERED
(and the user happens to be in the MUC via another client)
and then restores cached messages without taking
`clear_messages_on_reconnection` into account.
We now distinguish more clearly between joining and re-joining a MUC.
The `enterRoom` method has been refactored away.
Instead, `join` or `rejoin` should be used, depending on the circumstances.
Don't fetch cached occupants in the `initialize` function, instead, only fetch
them if we're restoring a MUC that we're still connected to.
If we're not restoring a still-connected MUC, then we clear the
occupants cache, and the messages cache if `clear_messages_on_reconnection` is `true`.
updates #1807
updates #1808
