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![Erik Johnston](/assets/img/avatar_default.png)
Currently we rely on `current_state_events` to figure out what rooms a user was in and their last membership event in there. However, if the server leaves the room then the table may be cleaned up and that information is lost. So lets add a table that separately holds that information.
162 lines
5.6 KiB
Python
162 lines
5.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from twisted.internet import defer
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from synapse.api.constants import EventTypes, Membership, RoomCreationPreset
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from synapse.types import create_requester
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from synapse.util.caches.descriptors import cachedInlineCallbacks
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logger = logging.getLogger(__name__)
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SERVER_NOTICE_ROOM_TAG = "m.server_notice"
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class ServerNoticesManager(object):
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def __init__(self, hs):
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"""
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Args:
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hs (synapse.server.HomeServer):
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"""
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self._store = hs.get_datastore()
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self._config = hs.config
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self._room_creation_handler = hs.get_room_creation_handler()
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self._event_creation_handler = hs.get_event_creation_handler()
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self._is_mine_id = hs.is_mine_id
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self._notifier = hs.get_notifier()
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def is_enabled(self):
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"""Checks if server notices are enabled on this server.
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Returns:
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bool
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"""
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return self._config.server_notices_mxid is not None
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@defer.inlineCallbacks
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def send_notice(
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self, user_id, event_content, type=EventTypes.Message, state_key=None
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):
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"""Send a notice to the given user
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Creates the server notices room, if none exists.
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Args:
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user_id (str): mxid of user to send event to.
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event_content (dict): content of event to send
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type(EventTypes): type of event
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is_state_event(bool): Is the event a state event
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Returns:
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Deferred[FrozenEvent]
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"""
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room_id = yield self.get_notice_room_for_user(user_id)
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system_mxid = self._config.server_notices_mxid
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requester = create_requester(system_mxid)
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logger.info("Sending server notice to %s", user_id)
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event_dict = {
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"type": type,
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"room_id": room_id,
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"sender": system_mxid,
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"content": event_content,
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}
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if state_key is not None:
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event_dict["state_key"] = state_key
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res = yield self._event_creation_handler.create_and_send_nonmember_event(
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requester, event_dict, ratelimit=False
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)
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return res
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@cachedInlineCallbacks()
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def get_notice_room_for_user(self, user_id):
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"""Get the room for notices for a given user
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If we have not yet created a notice room for this user, create it
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Args:
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user_id (str): complete user id for the user we want a room for
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Returns:
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str: room id of notice room.
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"""
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if not self.is_enabled():
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raise Exception("Server notices not enabled")
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assert self._is_mine_id(user_id), "Cannot send server notices to remote users"
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rooms = yield self._store.get_rooms_for_local_user_where_membership_is(
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user_id, [Membership.INVITE, Membership.JOIN]
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)
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system_mxid = self._config.server_notices_mxid
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for room in rooms:
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# it's worth noting that there is an asymmetry here in that we
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# expect the user to be invited or joined, but the system user must
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# be joined. This is kinda deliberate, in that if somebody somehow
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# manages to invite the system user to a room, that doesn't make it
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# the server notices room.
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user_ids = yield self._store.get_users_in_room(room.room_id)
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if system_mxid in user_ids:
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# we found a room which our user shares with the system notice
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# user
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logger.info("Using room %s", room.room_id)
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return room.room_id
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# apparently no existing notice room: create a new one
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logger.info("Creating server notices room for %s", user_id)
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# see if we want to override the profile info for the server user.
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# note that if we want to override either the display name or the
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# avatar, we have to use both.
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join_profile = None
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if (
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self._config.server_notices_mxid_display_name is not None
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or self._config.server_notices_mxid_avatar_url is not None
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):
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join_profile = {
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"displayname": self._config.server_notices_mxid_display_name,
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"avatar_url": self._config.server_notices_mxid_avatar_url,
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}
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requester = create_requester(system_mxid)
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info = yield self._room_creation_handler.create_room(
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requester,
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config={
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"preset": RoomCreationPreset.PRIVATE_CHAT,
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"name": self._config.server_notices_room_name,
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"power_level_content_override": {"users_default": -10},
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"invite": (user_id,),
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},
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ratelimit=False,
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creator_join_profile=join_profile,
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)
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room_id = info["room_id"]
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max_id = yield self._store.add_tag_to_room(
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user_id, room_id, SERVER_NOTICE_ROOM_TAG, {}
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)
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self._notifier.on_new_event("account_data_key", max_id, users=[user_id])
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logger.info("Created server notices room %s for %s", room_id, user_id)
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return room_id
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