def send_stream_creation_event(stream: Stream, user_ids: List[int]) -> None: event = dict(type="stream", op="create", streams=[stream.to_dict()]) send_event(stream.realm, event, user_ids)
def do_deactivate_stream( stream: Stream, log: bool = True, *, acting_user: Optional[UserProfile] ) -> None: # We want to mark all messages in the to-be-deactivated stream as # read for all users; otherwise they will pollute queries like # "Get the user's first unread message". Since this can be an # expensive operation, we do it via the deferred_work queue # processor. deferred_work_event = { "type": "mark_stream_messages_as_read_for_everyone", "stream_recipient_id": stream.recipient_id, } transaction.on_commit(lambda: queue_json_publish("deferred_work", deferred_work_event)) # Get the affected user ids *before* we deactivate everybody. affected_user_ids = can_access_stream_user_ids(stream) get_active_subscriptions_for_stream_id(stream.id, include_deactivated_users=True).update( active=False ) was_invite_only = stream.invite_only stream.deactivated = True stream.invite_only = True # Preserve as much as possible the original stream name while giving it a # special prefix that both indicates that the stream is deactivated and # frees up the original name for reuse. old_name = stream.name # Prepend a substring of the hashed stream ID to the new stream name streamID = str(stream.id) stream_id_hash_object = hashlib.sha512(streamID.encode()) hashed_stream_id = stream_id_hash_object.hexdigest()[0:7] new_name = (hashed_stream_id + "!DEACTIVATED:" + old_name)[: Stream.MAX_NAME_LENGTH] stream.name = new_name[: Stream.MAX_NAME_LENGTH] stream.save(update_fields=["name", "deactivated", "invite_only"]) # If this is a default stream, remove it, properly sending a # notification to browser clients. if DefaultStream.objects.filter(realm_id=stream.realm_id, stream_id=stream.id).exists(): do_remove_default_stream(stream) default_stream_groups_for_stream = DefaultStreamGroup.objects.filter(streams__id=stream.id) for group in default_stream_groups_for_stream: do_remove_streams_from_default_stream_group(stream.realm, group, [stream]) # Remove the old stream information from remote cache. old_cache_key = get_stream_cache_key(old_name, stream.realm_id) cache_delete(old_cache_key) stream_dict = stream.to_dict() stream_dict.update(dict(name=old_name, invite_only=was_invite_only)) event = dict(type="stream", op="delete", streams=[stream_dict]) transaction.on_commit(lambda: send_event(stream.realm, event, affected_user_ids)) event_time = timezone_now() RealmAuditLog.objects.create( realm=stream.realm, acting_user=acting_user, modified_stream=stream, event_type=RealmAuditLog.STREAM_DEACTIVATED, event_time=event_time, )