Notifier: accept callbacks to fire on room joins (#13254)

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David Robertson 2022-07-13 19:48:24 +01:00 committed by GitHub
parent cc1071598a
commit 0eb7e69768
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2 changed files with 19 additions and 0 deletions

1
changelog.d/13254.misc Normal file
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@ -0,0 +1 @@
Preparatory work for a per-room rate limiter on joins.

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@ -228,6 +228,7 @@ class Notifier:
# Called when there are new things to stream over replication
self.replication_callbacks: List[Callable[[], None]] = []
self._new_join_in_room_callbacks: List[Callable[[str, str], None]] = []
self._federation_client = hs.get_federation_http_client()
@ -280,6 +281,19 @@ class Notifier:
"""
self.replication_callbacks.append(cb)
def add_new_join_in_room_callback(self, cb: Callable[[str, str], None]) -> None:
"""Add a callback that will be called when a user joins a room.
This only fires on genuine membership changes, e.g. "invite" -> "join".
Membership transitions like "join" -> "join" (for e.g. displayname changes) do
not trigger the callback.
When called, the callback receives two arguments: the event ID and the room ID.
It should *not* return a Deferred - if it needs to do any asynchronous work, a
background thread should be started and wrapped with run_as_background_process.
"""
self._new_join_in_room_callbacks.append(cb)
async def on_new_room_event(
self,
event: EventBase,
@ -723,6 +737,10 @@ class Notifier:
for cb in self.replication_callbacks:
cb()
def notify_user_joined_room(self, event_id: str, room_id: str) -> None:
for cb in self._new_join_in_room_callbacks:
cb(event_id, room_id)
def notify_remote_server_up(self, server: str) -> None:
"""Notify any replication that a remote server has come back up"""
# We call federation_sender directly rather than registering as a