mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-25 03:35:28 +00:00
50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
User Directory API Implementation
|
|
=================================
|
|
|
|
The user directory is currently maintained based on the 'visible' users
|
|
on this particular server - i.e. ones which your account shares a room with, or
|
|
who are present in a publicly viewable room present on the server.
|
|
|
|
The directory info is stored in various tables, which can (typically after
|
|
DB corruption) get stale or out of sync. If this happens, for now the
|
|
solution to fix it is to execute the SQL [here](https://github.com/matrix-org/synapse/blob/master/synapse/storage/schema/main/delta/53/user_dir_populate.sql)
|
|
and then restart synapse. This should then start a background task to
|
|
flush the current tables and regenerate the directory.
|
|
|
|
Data model
|
|
----------
|
|
|
|
There are five relevant tables that collectively form the "user directory".
|
|
Three of them track a master list of all the users we could search for.
|
|
The last two (collectively called the "search tables") track who can
|
|
see who.
|
|
|
|
From all of these tables we exclude three types of local user:
|
|
- support users
|
|
- appservice users
|
|
- deactivated users
|
|
|
|
* `user_directory`. This contains the user_id, display name and avatar we'll
|
|
return when you search the directory.
|
|
- Because there's only one directory entry per user, it's important that we only
|
|
ever put publicly visible names here. Otherwise we might leak a private
|
|
nickname or avatar used in a private room.
|
|
- Indexed on rooms. Indexed on users.
|
|
|
|
* `user_directory_search`. To be joined to `user_directory`. It contains an extra
|
|
column that enables full text search based on user ids and display names.
|
|
Different schemas for SQLite and Postgres with different code paths to match.
|
|
- Indexed on the full text search data. Indexed on users.
|
|
|
|
* `user_directory_stream_pos`. When the initial background update to populate
|
|
the directory is complete, we record a stream position here. This indicates
|
|
that synapse should now listen for room changes and incrementally update
|
|
the directory where necessary.
|
|
|
|
* `users_in_public_rooms`. Contains associations between users and the public rooms they're in.
|
|
Used to determine which users are in public rooms and should be publicly visible in the directory.
|
|
|
|
* `users_who_share_private_rooms`. Rows are triples `(L, M, room id)` where `L`
|
|
is a local user and `M` is a local or remote user. `L` and `M` should be
|
|
different, but this isn't enforced by a constraint.
|