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WIPish: MSC1769: Extensible profiles as rooms #1769

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WIPish: MSC1769: Extensible profiles as rooms #1769

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2411c45
first cut of a profiles-as-rooms MSC
ara4n Jan 3, 2019
ff1d197
gah tabs spaces
ara4n Jan 3, 2019
3f59758
backlink to MSC489
ara4n Jan 3, 2019
a6816ec
switch proposed profile format & justify it
ara4n Jan 4, 2019
a20a1a3
spell out deps
ara4n Jan 6, 2019
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5 changes: 3 additions & 2 deletions proposals/1769-extensible-profiles-as-rooms.md
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Expand Up @@ -14,7 +14,8 @@ leverage all the existing infrastructure we have for sending and receiving state
events.

Clients should construct the default alias of the profile room is constructed as
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I'm not sure this sentence came out the way it was supposed to

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indeed

Suggested change
Clients should construct the default alias of the profile room is constructed as
Clients should construct the default alias of the profile room as

`#_profile_userid:<server>`.
`#@userid:<server>` (assuming aliases allow @; if not, `#_profile_userid:<server>`.
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Suggested change
`#@userid:<server>` (assuming aliases allow @; if not, `#_profile_userid:<server>`.
`#@<userid>:<server>` (assuming aliases allow @; if not, `#_profile_<userid>:<server>`.

to better capture that userid here is not a literal.

The server in the alias is that of the user whose profile is being considered.
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I don't like that format, it looks more like a typo IMO.

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@gleachkr gleachkr Apr 15, 2021 •
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Here's another worry about the default alias scheme, from a discussion on #matrix-spec.

So, as I read this, a user with a userid @<mylocalpart>:<myserver> is supposed to have a default room profile alias of #@<mylocalpart>:<myserver> or #_profile_<mylocalpart>:<myserver>.

But userids are limited to 255 characters (in a subset of us-ascii, so assuming utf-8, 1 byte per character), while room aliases are limited to 255 bytes. So a 255 character userid, prefixed with # and utf-8 encoded will produce an invalid room profile alias.

Perhaps this could be avoided by only exposing room profiles via the profile field in m.room.member?


This may be overridden per-room by setting a `profile` field in the
`m.room.member` for the user. (Once we remove MXIDs from rooms in
Expand All @@ -26,7 +27,7 @@ the same underlying profile room).
This does not replace the current `displayname` and `avatar_url` field behaviour
on `m.room.membership` events which we have today.

This is an alternative to [MSC489](https://github.com/matrix-org/matrix-doc/issues/489).
This proposal is an alternative to [MSC489](https://github.com/matrix-org/matrix-doc/issues/489).

## Client behaviour

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