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| # -*- coding: utf-8 -*- | |
| # Copyright 2016 OpenMarket Ltd | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| import logging | |
| from signedjson.key import decode_verify_key_bytes | |
| from signedjson.sign import verify_signed_json | |
| from twisted.internet import defer | |
| from unpaddedbase64 import decode_base64 | |
| import synapse.types | |
| from synapse.api.constants import ( | |
| EventTypes, Membership, | |
| ) | |
| from synapse.api.errors import AuthError, SynapseError, Codes | |
| from synapse.types import UserID, RoomID | |
| from synapse.util.async import Linearizer | |
| from synapse.util.distributor import user_left_room, user_joined_room | |
| from ._base import BaseHandler | |
| logger = logging.getLogger(__name__) | |
| id_server_scheme = "https://" | |
| class RoomMemberHandler(BaseHandler): | |
| # TODO(paul): This handler currently contains a messy conflation of | |
| # low-level API that works on UserID objects and so on, and REST-level | |
| # API that takes ID strings and returns pagination chunks. These concerns | |
| # ought to be separated out a lot better. | |
| def __init__(self, hs): | |
| super(RoomMemberHandler, self).__init__(hs) | |
| self.member_linearizer = Linearizer(name="member") | |
| self.clock = hs.get_clock() | |
| self.distributor = hs.get_distributor() | |
| self.distributor.declare("user_joined_room") | |
| self.distributor.declare("user_left_room") | |
| @defer.inlineCallbacks | |
| def _local_membership_update( | |
| self, requester, target, room_id, membership, | |
| prev_event_ids, | |
| txn_id=None, | |
| ratelimit=True, | |
| content=None, | |
| ): | |
| if content is None: | |
| content = {} | |
| msg_handler = self.hs.get_handlers().message_handler | |
| content["membership"] = membership | |
| if requester.is_guest: | |
| content["kind"] = "guest" | |
| event, context = yield msg_handler.create_event( | |
| requester, | |
| { | |
| "type": EventTypes.Member, | |
| "content": content, | |
| "room_id": room_id, | |
| "sender": requester.user.to_string(), | |
| "state_key": target.to_string(), | |
| # For backwards compatibility: | |
| "membership": membership, | |
| }, | |
| token_id=requester.access_token_id, | |
| txn_id=txn_id, | |
| prev_event_ids=prev_event_ids, | |
| ) | |
| # Check if this event matches the previous membership event for the user. | |
| duplicate = yield msg_handler.deduplicate_state_event(event, context) | |
| if duplicate is not None: | |
| # Discard the new event since this membership change is a no-op. | |
| defer.returnValue(duplicate) | |
| yield msg_handler.handle_new_client_event( | |
| requester, | |
| event, | |
| context, | |
| extra_users=[target], | |
| ratelimit=ratelimit, | |
| ) | |
| prev_member_event_id = context.prev_state_ids.get( | |
| (EventTypes.Member, target.to_string()), | |
| None | |
| ) | |
| if event.membership == Membership.JOIN: | |
| # Only fire user_joined_room if the user has acutally joined the | |
| # room. Don't bother if the user is just changing their profile | |
| # info. | |
| newly_joined = True | |
| if prev_member_event_id: | |
| prev_member_event = yield self.store.get_event(prev_member_event_id) | |
| newly_joined = prev_member_event.membership != Membership.JOIN | |
| if newly_joined: | |
| yield user_joined_room(self.distributor, target, room_id) | |
| elif event.membership == Membership.LEAVE: | |
| if prev_member_event_id: | |
| prev_member_event = yield self.store.get_event(prev_member_event_id) | |
| if prev_member_event.membership == Membership.JOIN: | |
| user_left_room(self.distributor, target, room_id) | |
| defer.returnValue(event) | |
| @defer.inlineCallbacks | |
| def remote_join(self, remote_room_hosts, room_id, user, content): | |
| if len(remote_room_hosts) == 0: | |
| raise SynapseError(404, "No known servers") | |
| # We don't do an auth check if we are doing an invite | |
| # join dance for now, since we're kinda implicitly checking | |
| # that we are allowed to join when we decide whether or not we | |
| # need to do the invite/join dance. | |
| yield self.hs.get_handlers().federation_handler.do_invite_join( | |
| remote_room_hosts, | |
| room_id, | |
| user.to_string(), | |
| content, | |
| ) | |
| yield user_joined_room(self.distributor, user, room_id) | |
| @defer.inlineCallbacks | |
| def update_membership( | |
| self, | |
| requester, | |
| target, | |
| room_id, | |
| action, | |
| txn_id=None, | |
| remote_room_hosts=None, | |
| third_party_signed=None, | |
| ratelimit=True, | |
| content=None, | |
| ): | |
| key = (room_id,) | |
| with (yield self.member_linearizer.queue(key)): | |
| result = yield self._update_membership( | |
| requester, | |
| target, | |
| room_id, | |
| action, | |
| txn_id=txn_id, | |
| remote_room_hosts=remote_room_hosts, | |
| third_party_signed=third_party_signed, | |
| ratelimit=ratelimit, | |
| content=content, | |
| ) | |
| defer.returnValue(result) | |
| @defer.inlineCallbacks | |
| def _update_membership( | |
| self, | |
| requester, | |
| target, | |
| room_id, | |
| action, | |
| txn_id=None, | |
| remote_room_hosts=None, | |
| third_party_signed=None, | |
| ratelimit=True, | |
| content=None, | |
| ): | |
| content_specified = bool(content) | |
| if content is None: | |
| content = {} | |
| effective_membership_state = action | |
| if action in ["kick", "unban"]: | |
| effective_membership_state = "leave" | |
| if third_party_signed is not None: | |
| replication = self.hs.get_replication_layer() | |
| yield replication.exchange_third_party_invite( | |
| third_party_signed["sender"], | |
| target.to_string(), | |
| room_id, | |
| third_party_signed, | |
| ) | |
| if not remote_room_hosts: | |
| remote_room_hosts = [] | |
| if effective_membership_state not in ("leave", "ban",): | |
| is_blocked = yield self.store.is_room_blocked(room_id) | |
| if is_blocked: | |
| raise SynapseError(403, "This room has been blocked on this server") | |
| latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) | |
| current_state_ids = yield self.state_handler.get_current_state_ids( | |
| room_id, latest_event_ids=latest_event_ids, | |
| ) | |
| old_state_id = current_state_ids.get((EventTypes.Member, target.to_string())) | |
| if old_state_id: | |
| old_state = yield self.store.get_event(old_state_id, allow_none=True) | |
| old_membership = old_state.content.get("membership") if old_state else None | |
| if action == "unban" and old_membership != "ban": | |
| raise SynapseError( | |
| 403, | |
| "Cannot unban user who was not banned" | |
| " (membership=%s)" % old_membership, | |
| errcode=Codes.BAD_STATE | |
| ) | |
| if old_membership == "ban" and action != "unban": | |
| raise SynapseError( | |
| 403, | |
| "Cannot %s user who was banned" % (action,), | |
| errcode=Codes.BAD_STATE | |
| ) | |
| if old_state: | |
| same_content = content == old_state.content | |
| same_membership = old_membership == effective_membership_state | |
| same_sender = requester.user.to_string() == old_state.sender | |
| if same_sender and same_membership and same_content: | |
| defer.returnValue(old_state) | |
| is_host_in_room = yield self._is_host_in_room(current_state_ids) | |
| if effective_membership_state == Membership.JOIN: | |
| if requester.is_guest: | |
| guest_can_join = yield self._can_guest_join(current_state_ids) | |
| if not guest_can_join: | |
| # This should be an auth check, but guests are a local concept, | |
| # so don't really fit into the general auth process. | |
| raise AuthError(403, "Guest access not allowed") | |
| if not is_host_in_room: | |
| inviter = yield self.get_inviter(target.to_string(), room_id) | |
| if inviter and not self.hs.is_mine(inviter): | |
| remote_room_hosts.append(inviter.domain) | |
| content["membership"] = Membership.JOIN | |
| profile = self.hs.get_handlers().profile_handler | |
| if not content_specified: | |
| content["displayname"] = yield profile.get_displayname(target) | |
| content["avatar_url"] = yield profile.get_avatar_url(target) | |
| if requester.is_guest: | |
| content["kind"] = "guest" | |
| ret = yield self.remote_join( | |
| remote_room_hosts, room_id, target, content | |
| ) | |
| defer.returnValue(ret) | |
| elif effective_membership_state == Membership.LEAVE: | |
| if not is_host_in_room: | |
| # perhaps we've been invited | |
| inviter = yield self.get_inviter(target.to_string(), room_id) | |
| if not inviter: | |
| raise SynapseError(404, "Not a known room") | |
| if self.hs.is_mine(inviter): | |
| # the inviter was on our server, but has now left. Carry on | |
| # with the normal rejection codepath. | |
| # | |
| # This is a bit of a hack, because the room might still be | |
| # active on other servers. | |
| pass | |
| else: | |
| # send the rejection to the inviter's HS. | |
| remote_room_hosts = remote_room_hosts + [inviter.domain] | |
| fed_handler = self.hs.get_handlers().federation_handler | |
| try: | |
| ret = yield fed_handler.do_remotely_reject_invite( | |
| remote_room_hosts, | |
| room_id, | |
| target.to_string(), | |
| ) | |
| defer.returnValue(ret) | |
| except Exception as e: | |
| # if we were unable to reject the exception, just mark | |
| # it as rejected on our end and plough ahead. | |
| # | |
| # The 'except' clause is very broad, but we need to | |
| # capture everything from DNS failures upwards | |
| # | |
| logger.warn("Failed to reject invite: %s", e) | |
| yield self.store.locally_reject_invite( | |
| target.to_string(), room_id | |
| ) | |
| defer.returnValue({}) | |
| res = yield self._local_membership_update( | |
| requester=requester, | |
| target=target, | |
| room_id=room_id, | |
| membership=effective_membership_state, | |
| txn_id=txn_id, | |
| ratelimit=ratelimit, | |
| prev_event_ids=latest_event_ids, | |
| content=content, | |
| ) | |
| defer.returnValue(res) | |
| @defer.inlineCallbacks | |
| def send_membership_event( | |
| self, | |
| requester, | |
| event, | |
| context, | |
| remote_room_hosts=None, | |
| ratelimit=True, | |
| ): | |
| """ | |
| Change the membership status of a user in a room. | |
| Args: | |
| requester (Requester): The local user who requested the membership | |
| event. If None, certain checks, like whether this homeserver can | |
| act as the sender, will be skipped. | |
| event (SynapseEvent): The membership event. | |
| context: The context of the event. | |
| is_guest (bool): Whether the sender is a guest. | |
| room_hosts ([str]): Homeservers which are likely to already be in | |
| the room, and could be danced with in order to join this | |
| homeserver for the first time. | |
| ratelimit (bool): Whether to rate limit this request. | |
| Raises: | |
| SynapseError if there was a problem changing the membership. | |
| """ | |
| remote_room_hosts = remote_room_hosts or [] | |
| target_user = UserID.from_string(event.state_key) | |
| room_id = event.room_id | |
| if requester is not None: | |
| sender = UserID.from_string(event.sender) | |
| assert sender == requester.user, ( | |
| "Sender (%s) must be same as requester (%s)" % | |
| (sender, requester.user) | |
| ) | |
| assert self.hs.is_mine(sender), "Sender must be our own: %s" % (sender,) | |
| else: | |
| requester = synapse.types.create_requester(target_user) | |
| message_handler = self.hs.get_handlers().message_handler | |
| prev_event = yield message_handler.deduplicate_state_event(event, context) | |
| if prev_event is not None: | |
| return | |
| if event.membership == Membership.JOIN: | |
| if requester.is_guest: | |
| guest_can_join = yield self._can_guest_join(context.prev_state_ids) | |
| if not guest_can_join: | |
| # This should be an auth check, but guests are a local concept, | |
| # so don't really fit into the general auth process. | |
| raise AuthError(403, "Guest access not allowed") | |
| if event.membership not in (Membership.LEAVE, Membership.BAN): | |
| is_blocked = yield self.store.is_room_blocked(room_id) | |
| if is_blocked: | |
| raise SynapseError(403, "This room has been blocked on this server") | |
| yield message_handler.handle_new_client_event( | |
| requester, | |
| event, | |
| context, | |
| extra_users=[target_user], | |
| ratelimit=ratelimit, | |
| ) | |
| prev_member_event_id = context.prev_state_ids.get( | |
| (EventTypes.Member, event.state_key), | |
| None | |
| ) | |
| if event.membership == Membership.JOIN: | |
| # Only fire user_joined_room if the user has acutally joined the | |
| # room. Don't bother if the user is just changing their profile | |
| # info. | |
| newly_joined = True | |
| if prev_member_event_id: | |
| prev_member_event = yield self.store.get_event(prev_member_event_id) | |
| newly_joined = prev_member_event.membership != Membership.JOIN | |
| if newly_joined: | |
| yield user_joined_room(self.distributor, target_user, room_id) | |
| elif event.membership == Membership.LEAVE: | |
| if prev_member_event_id: | |
| prev_member_event = yield self.store.get_event(prev_member_event_id) | |
| if prev_member_event.membership == Membership.JOIN: | |
| user_left_room(self.distributor, target_user, room_id) | |
| @defer.inlineCallbacks | |
| def _can_guest_join(self, current_state_ids): | |
| """ | |
| Returns whether a guest can join a room based on its current state. | |
| """ | |
| guest_access_id = current_state_ids.get((EventTypes.GuestAccess, ""), None) | |
| if not guest_access_id: | |
| defer.returnValue(False) | |
| guest_access = yield self.store.get_event(guest_access_id) | |
| defer.returnValue( | |
| guest_access | |
| and guest_access.content | |
| and "guest_access" in guest_access.content | |
| and guest_access.content["guest_access"] == "can_join" | |
| ) | |
| @defer.inlineCallbacks | |
| def lookup_room_alias(self, room_alias): | |
| """ | |
| Get the room ID associated with a room alias. | |
| Args: | |
| room_alias (RoomAlias): The alias to look up. | |
| Returns: | |
| A tuple of: | |
| The room ID as a RoomID object. | |
| Hosts likely to be participating in the room ([str]). | |
| Raises: | |
| SynapseError if room alias could not be found. | |
| """ | |
| directory_handler = self.hs.get_handlers().directory_handler | |
| mapping = yield directory_handler.get_association(room_alias) | |
| if not mapping: | |
| raise SynapseError(404, "No such room alias") | |
| room_id = mapping["room_id"] | |
| servers = mapping["servers"] | |
| defer.returnValue((RoomID.from_string(room_id), servers)) | |
| @defer.inlineCallbacks | |
| def get_inviter(self, user_id, room_id): | |
| invite = yield self.store.get_invite_for_user_in_room( | |
| user_id=user_id, | |
| room_id=room_id, | |
| ) | |
| if invite: | |
| defer.returnValue(UserID.from_string(invite.sender)) | |
| @defer.inlineCallbacks | |
| def do_3pid_invite( | |
| self, | |
| room_id, | |
| inviter, | |
| medium, | |
| address, | |
| id_server, | |
| requester, | |
| txn_id | |
| ): | |
| invitee = yield self._lookup_3pid( | |
| id_server, medium, address | |
| ) | |
| if invitee: | |
| yield self.update_membership( | |
| requester, | |
| UserID.from_string(invitee), | |
| room_id, | |
| "invite", | |
| txn_id=txn_id, | |
| ) | |
| else: | |
| yield self._make_and_store_3pid_invite( | |
| requester, | |
| id_server, | |
| medium, | |
| address, | |
| room_id, | |
| inviter, | |
| txn_id=txn_id | |
| ) | |
| @defer.inlineCallbacks | |
| def _lookup_3pid(self, id_server, medium, address): | |
| """Looks up a 3pid in the passed identity server. | |
| Args: | |
| id_server (str): The server name (including port, if required) | |
| of the identity server to use. | |
| medium (str): The type of the third party identifier (e.g. "email"). | |
| address (str): The third party identifier (e.g. "foo@example.com"). | |
| Returns: | |
| str: the matrix ID of the 3pid, or None if it is not recognized. | |
| """ | |
| try: | |
| data = yield self.hs.get_simple_http_client().get_json( | |
| "%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server,), | |
| { | |
| "medium": medium, | |
| "address": address, | |
| } | |
| ) | |
| if "mxid" in data: | |
| if "signatures" not in data: | |
| raise AuthError(401, "No signatures on 3pid binding") | |
| self.verify_any_signature(data, id_server) | |
| defer.returnValue(data["mxid"]) | |
| except IOError as e: | |
| logger.warn("Error from identity server lookup: %s" % (e,)) | |
| defer.returnValue(None) | |
| @defer.inlineCallbacks | |
| def verify_any_signature(self, data, server_hostname): | |
| if server_hostname not in data["signatures"]: | |
| raise AuthError(401, "No signature from server %s" % (server_hostname,)) | |
| for key_name, signature in data["signatures"][server_hostname].items(): | |
| key_data = yield self.hs.get_simple_http_client().get_json( | |
| "%s%s/_matrix/identity/api/v1/pubkey/%s" % | |
| (id_server_scheme, server_hostname, key_name,), | |
| ) | |
| if "public_key" not in key_data: | |
| raise AuthError(401, "No public key named %s from %s" % | |
| (key_name, server_hostname,)) | |
| verify_signed_json( | |
| data, | |
| server_hostname, | |
| decode_verify_key_bytes(key_name, decode_base64(key_data["public_key"])) | |
| ) | |
| return | |
| @defer.inlineCallbacks | |
| def _make_and_store_3pid_invite( | |
| self, | |
| requester, | |
| id_server, | |
| medium, | |
| address, | |
| room_id, | |
| user, | |
| txn_id | |
| ): | |
| room_state = yield self.hs.get_state_handler().get_current_state(room_id) | |
| inviter_display_name = "" | |
| inviter_avatar_url = "" | |
| member_event = room_state.get((EventTypes.Member, user.to_string())) | |
| if member_event: | |
| inviter_display_name = member_event.content.get("displayname", "") | |
| inviter_avatar_url = member_event.content.get("avatar_url", "") | |
| canonical_room_alias = "" | |
| canonical_alias_event = room_state.get((EventTypes.CanonicalAlias, "")) | |
| if canonical_alias_event: | |
| canonical_room_alias = canonical_alias_event.content.get("alias", "") | |
| room_name = "" | |
| room_name_event = room_state.get((EventTypes.Name, "")) | |
| if room_name_event: | |
| room_name = room_name_event.content.get("name", "") | |
| room_join_rules = "" | |
| join_rules_event = room_state.get((EventTypes.JoinRules, "")) | |
| if join_rules_event: | |
| room_join_rules = join_rules_event.content.get("join_rule", "") | |
| room_avatar_url = "" | |
| room_avatar_event = room_state.get((EventTypes.RoomAvatar, "")) | |
| if room_avatar_event: | |
| room_avatar_url = room_avatar_event.content.get("url", "") | |
| token, public_keys, fallback_public_key, display_name = ( | |
| yield self._ask_id_server_for_third_party_invite( | |
| id_server=id_server, | |
| medium=medium, | |
| address=address, | |
| room_id=room_id, | |
| inviter_user_id=user.to_string(), | |
| room_alias=canonical_room_alias, | |
| room_avatar_url=room_avatar_url, | |
| room_join_rules=room_join_rules, | |
| room_name=room_name, | |
| inviter_display_name=inviter_display_name, | |
| inviter_avatar_url=inviter_avatar_url | |
| ) | |
| ) | |
| msg_handler = self.hs.get_handlers().message_handler | |
| yield msg_handler.create_and_send_nonmember_event( | |
| requester, | |
| { | |
| "type": EventTypes.ThirdPartyInvite, | |
| "content": { | |
| "display_name": display_name, | |
| "public_keys": public_keys, | |
| # For backwards compatibility: | |
| "key_validity_url": fallback_public_key["key_validity_url"], | |
| "public_key": fallback_public_key["public_key"], | |
| }, | |
| "room_id": room_id, | |
| "sender": user.to_string(), | |
| "state_key": token, | |
| }, | |
| txn_id=txn_id, | |
| ) | |
| @defer.inlineCallbacks | |
| def _ask_id_server_for_third_party_invite( | |
| self, | |
| id_server, | |
| medium, | |
| address, | |
| room_id, | |
| inviter_user_id, | |
| room_alias, | |
| room_avatar_url, | |
| room_join_rules, | |
| room_name, | |
| inviter_display_name, | |
| inviter_avatar_url | |
| ): | |
| """ | |
| Asks an identity server for a third party invite. | |
| Args: | |
| id_server (str): hostname + optional port for the identity server. | |
| medium (str): The literal string "email". | |
| address (str): The third party address being invited. | |
| room_id (str): The ID of the room to which the user is invited. | |
| inviter_user_id (str): The user ID of the inviter. | |
| room_alias (str): An alias for the room, for cosmetic notifications. | |
| room_avatar_url (str): The URL of the room's avatar, for cosmetic | |
| notifications. | |
| room_join_rules (str): The join rules of the email (e.g. "public"). | |
| room_name (str): The m.room.name of the room. | |
| inviter_display_name (str): The current display name of the | |
| inviter. | |
| inviter_avatar_url (str): The URL of the inviter's avatar. | |
| Returns: | |
| A deferred tuple containing: | |
| token (str): The token which must be signed to prove authenticity. | |
| public_keys ([{"public_key": str, "key_validity_url": str}]): | |
| public_key is a base64-encoded ed25519 public key. | |
| fallback_public_key: One element from public_keys. | |
| display_name (str): A user-friendly name to represent the invited | |
| user. | |
| """ | |
| is_url = "%s%s/_matrix/identity/api/v1/store-invite" % ( | |
| id_server_scheme, id_server, | |
| ) | |
| invite_config = { | |
| "medium": medium, | |
| "address": address, | |
| "room_id": room_id, | |
| "room_alias": room_alias, | |
| "room_avatar_url": room_avatar_url, | |
| "room_join_rules": room_join_rules, | |
| "room_name": room_name, | |
| "sender": inviter_user_id, | |
| "sender_display_name": inviter_display_name, | |
| "sender_avatar_url": inviter_avatar_url, | |
| } | |
| if self.hs.config.invite_3pid_guest: | |
| registration_handler = self.hs.get_handlers().registration_handler | |
| guest_access_token = yield registration_handler.guest_access_token_for( | |
| medium=medium, | |
| address=address, | |
| inviter_user_id=inviter_user_id, | |
| ) | |
| guest_user_info = yield self.hs.get_auth().get_user_by_access_token( | |
| guest_access_token | |
| ) | |
| invite_config.update({ | |
| "guest_access_token": guest_access_token, | |
| "guest_user_id": guest_user_info["user"].to_string(), | |
| }) | |
| data = yield self.hs.get_simple_http_client().post_urlencoded_get_json( | |
| is_url, | |
| invite_config | |
| ) | |
| # TODO: Check for success | |
| token = data["token"] | |
| public_keys = data.get("public_keys", []) | |
| if "public_key" in data: | |
| fallback_public_key = { | |
| "public_key": data["public_key"], | |
| "key_validity_url": "%s%s/_matrix/identity/api/v1/pubkey/isvalid" % ( | |
| id_server_scheme, id_server, | |
| ), | |
| } | |
| else: | |
| fallback_public_key = public_keys[0] | |
| if not public_keys: | |
| public_keys.append(fallback_public_key) | |
| display_name = data["display_name"] | |
| defer.returnValue((token, public_keys, fallback_public_key, display_name)) | |
| @defer.inlineCallbacks | |
| def forget(self, user, room_id): | |
| user_id = user.to_string() | |
| member = yield self.state_handler.get_current_state( | |
| room_id=room_id, | |
| event_type=EventTypes.Member, | |
| state_key=user_id | |
| ) | |
| membership = member.membership if member else None | |
| if membership is not None and membership not in [ | |
| Membership.LEAVE, Membership.BAN | |
| ]: | |
| raise SynapseError(400, "User %s in room %s" % ( | |
| user_id, room_id | |
| )) | |
| if membership: | |
| yield self.store.forget(user_id, room_id) | |
| @defer.inlineCallbacks | |
| def _is_host_in_room(self, current_state_ids): | |
| # Have we just created the room, and is this about to be the very | |
| # first member event? | |
| create_event_id = current_state_ids.get(("m.room.create", "")) | |
| if len(current_state_ids) == 1 and create_event_id: | |
| defer.returnValue(self.hs.is_mine_id(create_event_id)) | |
| for etype, state_key in current_state_ids: | |
| if etype != EventTypes.Member or not self.hs.is_mine_id(state_key): | |
| continue | |
| event_id = current_state_ids[(etype, state_key)] | |
| event = yield self.store.get_event(event_id, allow_none=True) | |
| if not event: | |
| continue | |
| if event.membership == Membership.JOIN: | |
| defer.returnValue(True) | |
| defer.returnValue(False) |