mirror of
https://mau.dev/maunium/synapse.git
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789 lines
26 KiB
Python
789 lines
26 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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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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"""Contains functions for performing events on rooms."""
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import itertools
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import logging
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import math
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import string
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from collections import OrderedDict
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from six import string_types
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from twisted.internet import defer
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from synapse.api.constants import (
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DEFAULT_ROOM_VERSION,
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KNOWN_ROOM_VERSIONS,
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EventTypes,
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JoinRules,
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RoomCreationPreset,
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)
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from synapse.api.errors import AuthError, Codes, NotFoundError, StoreError, SynapseError
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from synapse.storage.state import StateFilter
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from synapse.types import RoomAlias, RoomID, RoomStreamToken, StreamToken, UserID
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from synapse.util import stringutils
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from synapse.util.async_helpers import Linearizer
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from synapse.visibility import filter_events_for_client
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from ._base import BaseHandler
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logger = logging.getLogger(__name__)
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id_server_scheme = "https://"
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class RoomCreationHandler(BaseHandler):
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PRESETS_DICT = {
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RoomCreationPreset.PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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"guest_can_join": True,
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},
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RoomCreationPreset.TRUSTED_PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": True,
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"guest_can_join": True,
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},
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RoomCreationPreset.PUBLIC_CHAT: {
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"join_rules": JoinRules.PUBLIC,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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"guest_can_join": False,
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},
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}
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def __init__(self, hs):
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super(RoomCreationHandler, self).__init__(hs)
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self.spam_checker = hs.get_spam_checker()
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self.event_creation_handler = hs.get_event_creation_handler()
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self.room_member_handler = hs.get_room_member_handler()
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# linearizer to stop two upgrades happening at once
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self._upgrade_linearizer = Linearizer("room_upgrade_linearizer")
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@defer.inlineCallbacks
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def upgrade_room(self, requester, old_room_id, new_version):
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"""Replace a room with a new room with a different version
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Args:
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requester (synapse.types.Requester): the user requesting the upgrade
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old_room_id (unicode): the id of the room to be replaced
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new_version (unicode): the new room version to use
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Returns:
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Deferred[unicode]: the new room id
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"""
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yield self.ratelimit(requester)
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user_id = requester.user.to_string()
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with (yield self._upgrade_linearizer.queue(old_room_id)):
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# start by allocating a new room id
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r = yield self.store.get_room(old_room_id)
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if r is None:
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raise NotFoundError("Unknown room id %s" % (old_room_id,))
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new_room_id = yield self._generate_room_id(
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creator_id=user_id, is_public=r["is_public"],
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)
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# we create and auth the tombstone event before properly creating the new
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# room, to check our user has perms in the old room.
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tombstone_event, tombstone_context = (
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yield self.event_creation_handler.create_event(
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requester, {
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"type": EventTypes.Tombstone,
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"state_key": "",
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"room_id": old_room_id,
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"sender": user_id,
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"content": {
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"body": "This room has been replaced",
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"replacement_room": new_room_id,
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}
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},
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token_id=requester.access_token_id,
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)
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)
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yield self.auth.check_from_context(tombstone_event, tombstone_context)
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yield self.clone_exiting_room(
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requester,
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old_room_id=old_room_id,
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new_room_id=new_room_id,
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new_room_version=new_version,
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tombstone_event_id=tombstone_event.event_id,
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)
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# now send the tombstone
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yield self.event_creation_handler.send_nonmember_event(
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requester, tombstone_event, tombstone_context,
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)
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# ... and restrict the PLs in the old room, if possible.
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old_room_pl_state = yield self.state_handler.get_current_state(
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old_room_id,
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event_type=EventTypes.PowerLevels,
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latest_event_ids=(tombstone_event.event_id, ),
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)
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if old_room_pl_state is None:
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logger.warning(
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"Not supported: upgrading a room with no PL event. Not setting PLs "
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"in old room.",
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)
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else:
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pl_content = dict(old_room_pl_state.content)
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users_default = int(pl_content.get("users_default", 0))
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restricted_level = max(users_default + 1, 50)
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updated = False
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for v in ("invite", "events_default"):
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current = int(pl_content.get(v, 0))
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if current < restricted_level:
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logger.debug(
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"Setting level for %s in %s to %i (was %i)",
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v, old_room_id, restricted_level, current,
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)
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pl_content[v] = restricted_level
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updated = True
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else:
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logger.debug(
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"Not setting level for %s (already %i)",
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v, current,
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)
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if updated:
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yield self.event_creation_handler.create_and_send_nonmember_event(
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requester, {
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"type": EventTypes.PowerLevels,
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"state_key": '',
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"room_id": old_room_id,
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"sender": user_id,
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"content": pl_content,
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}, ratelimit=False,
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)
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defer.returnValue(new_room_id)
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@defer.inlineCallbacks
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def clone_exiting_room(
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self, requester, old_room_id, new_room_id, new_room_version,
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tombstone_event_id,
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):
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"""Populate a new room based on an old room
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Args:
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requester (synapse.types.Requester): the user requesting the upgrade
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old_room_id (unicode): the id of the room to be replaced
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new_room_id (unicode): the id to give the new room (should already have been
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created with _gemerate_room_id())
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new_room_version (unicode): the new room version to use
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tombstone_event_id (unicode|str): the ID of the tombstone event in the old
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room.
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Returns:
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Deferred[None]
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"""
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user_id = requester.user.to_string()
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if not self.spam_checker.user_may_create_room(user_id):
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raise SynapseError(403, "You are not permitted to create rooms")
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# XXX check alias is free
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# canonical_alias = None
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# XXX create association in directory handler
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creation_content = {
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"room_version": new_room_version,
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"predecessor": {
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"room_id": old_room_id,
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"event_id": tombstone_event_id,
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}
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}
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initial_state = dict()
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types_to_copy = (
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(EventTypes.PowerLevels, ""),
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(EventTypes.JoinRules, ""),
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(EventTypes.Name, ""),
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(EventTypes.Topic, ""),
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(EventTypes.RoomHistoryVisibility, ""),
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(EventTypes.GuestAccess, "")
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)
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old_room_state_ids = yield self.store.get_filtered_current_state_ids(
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old_room_id, StateFilter.from_types(types_to_copy),
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)
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# map from event_id to BaseEvent
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old_room_state_events = yield self.store.get_events(old_room_state_ids.values())
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for k in types_to_copy:
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old_event_id = old_room_state_ids.get(k)
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if old_event_id:
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old_event = old_room_state_events.get(old_event_id)
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if old_event:
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initial_state[k] = old_event.content
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yield self._send_events_for_new_room(
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requester,
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new_room_id,
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# we expect to override all the presets with initial_state, so this is
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# somewhat arbitrary.
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preset_config=RoomCreationPreset.PRIVATE_CHAT,
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invite_list=[],
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initial_state=initial_state,
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creation_content=creation_content,
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)
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# XXX invites/joins
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# XXX 3pid invites
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# XXX directory_handler.send_room_alias_update_event
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@defer.inlineCallbacks
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def create_room(self, requester, config, ratelimit=True,
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creator_join_profile=None):
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""" Creates a new room.
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Args:
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requester (synapse.types.Requester):
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The user who requested the room creation.
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config (dict) : A dict of configuration options.
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ratelimit (bool): set to False to disable the rate limiter
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creator_join_profile (dict|None):
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Set to override the displayname and avatar for the creating
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user in this room. If unset, displayname and avatar will be
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derived from the user's profile. If set, should contain the
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values to go in the body of the 'join' event (typically
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`avatar_url` and/or `displayname`.
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Returns:
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Deferred[dict]:
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a dict containing the keys `room_id` and, if an alias was
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requested, `room_alias`.
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Raises:
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SynapseError if the room ID couldn't be stored, or something went
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horribly wrong.
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ResourceLimitError if server is blocked to some resource being
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exceeded
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"""
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user_id = requester.user.to_string()
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self.auth.check_auth_blocking(user_id)
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if not self.spam_checker.user_may_create_room(user_id):
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raise SynapseError(403, "You are not permitted to create rooms")
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if ratelimit:
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yield self.ratelimit(requester)
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room_version = config.get("room_version", DEFAULT_ROOM_VERSION)
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if not isinstance(room_version, string_types):
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raise SynapseError(
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400,
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"room_version must be a string",
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Codes.BAD_JSON,
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)
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if room_version not in KNOWN_ROOM_VERSIONS:
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raise SynapseError(
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400,
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"Your homeserver does not support this room version",
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Codes.UNSUPPORTED_ROOM_VERSION,
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)
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if "room_alias_name" in config:
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for wchar in string.whitespace:
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if wchar in config["room_alias_name"]:
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raise SynapseError(400, "Invalid characters in room alias")
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room_alias = RoomAlias(
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config["room_alias_name"],
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self.hs.hostname,
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)
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mapping = yield self.store.get_association_from_room_alias(
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room_alias
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)
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if mapping:
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raise SynapseError(
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400,
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"Room alias already taken",
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Codes.ROOM_IN_USE
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)
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else:
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room_alias = None
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invite_list = config.get("invite", [])
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for i in invite_list:
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try:
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UserID.from_string(i)
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except Exception:
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raise SynapseError(400, "Invalid user_id: %s" % (i,))
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yield self.event_creation_handler.assert_accepted_privacy_policy(
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requester,
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)
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invite_3pid_list = config.get("invite_3pid", [])
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visibility = config.get("visibility", None)
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is_public = visibility == "public"
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room_id = yield self._generate_room_id(creator_id=user_id, is_public=is_public)
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if room_alias:
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directory_handler = self.hs.get_handlers().directory_handler
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yield directory_handler.create_association(
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requester=requester,
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room_id=room_id,
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room_alias=room_alias,
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servers=[self.hs.hostname],
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send_event=False,
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)
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preset_config = config.get(
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"preset",
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RoomCreationPreset.PRIVATE_CHAT
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if visibility == "private"
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else RoomCreationPreset.PUBLIC_CHAT
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)
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raw_initial_state = config.get("initial_state", [])
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initial_state = OrderedDict()
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for val in raw_initial_state:
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initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
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creation_content = config.get("creation_content", {})
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# override any attempt to set room versions via the creation_content
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creation_content["room_version"] = room_version
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yield self._send_events_for_new_room(
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requester,
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room_id,
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preset_config=preset_config,
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invite_list=invite_list,
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initial_state=initial_state,
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creation_content=creation_content,
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room_alias=room_alias,
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power_level_content_override=config.get("power_level_content_override"),
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creator_join_profile=creator_join_profile,
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)
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if "name" in config:
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name = config["name"]
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yield self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Name,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"name": name},
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},
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ratelimit=False)
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if "topic" in config:
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topic = config["topic"]
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yield self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Topic,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"topic": topic},
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},
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ratelimit=False)
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for invitee in invite_list:
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content = {}
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is_direct = config.get("is_direct", None)
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if is_direct:
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content["is_direct"] = is_direct
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yield self.room_member_handler.update_membership(
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requester,
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UserID.from_string(invitee),
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room_id,
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"invite",
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ratelimit=False,
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content=content,
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)
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for invite_3pid in invite_3pid_list:
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id_server = invite_3pid["id_server"]
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address = invite_3pid["address"]
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medium = invite_3pid["medium"]
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yield self.hs.get_room_member_handler().do_3pid_invite(
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room_id,
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requester.user,
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medium,
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address,
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id_server,
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requester,
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txn_id=None,
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)
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result = {"room_id": room_id}
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if room_alias:
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result["room_alias"] = room_alias.to_string()
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yield directory_handler.send_room_alias_update_event(
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requester, room_id
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)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _send_events_for_new_room(
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self,
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creator, # A Requester object.
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room_id,
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preset_config,
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invite_list,
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initial_state,
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creation_content,
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room_alias=None,
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power_level_content_override=None,
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creator_join_profile=None,
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):
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def create(etype, content, **kwargs):
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e = {
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"type": etype,
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"content": content,
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}
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e.update(event_keys)
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e.update(kwargs)
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return e
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@defer.inlineCallbacks
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def send(etype, content, **kwargs):
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event = create(etype, content, **kwargs)
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yield self.event_creation_handler.create_and_send_nonmember_event(
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creator,
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event,
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ratelimit=False
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)
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config = RoomCreationHandler.PRESETS_DICT[preset_config]
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creator_id = creator.user.to_string()
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event_keys = {
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"room_id": room_id,
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"sender": creator_id,
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"state_key": "",
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}
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creation_content.update({"creator": creator_id})
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yield send(
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etype=EventTypes.Create,
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content=creation_content,
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)
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yield self.room_member_handler.update_membership(
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creator,
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creator.user,
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room_id,
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"join",
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ratelimit=False,
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content=creator_join_profile,
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)
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# We treat the power levels override specially as this needs to be one
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# of the first events that get sent into a room.
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pl_content = initial_state.pop((EventTypes.PowerLevels, ''), None)
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if pl_content is not None:
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yield send(
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etype=EventTypes.PowerLevels,
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content=pl_content,
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)
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else:
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power_level_content = {
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"users": {
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creator_id: 100,
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},
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"users_default": 0,
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"events": {
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EventTypes.Name: 50,
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EventTypes.PowerLevels: 100,
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EventTypes.RoomHistoryVisibility: 100,
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EventTypes.CanonicalAlias: 50,
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EventTypes.RoomAvatar: 50,
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},
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"events_default": 0,
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"state_default": 50,
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"ban": 50,
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"kick": 50,
|
|
"redact": 50,
|
|
"invite": 0,
|
|
}
|
|
|
|
if config["original_invitees_have_ops"]:
|
|
for invitee in invite_list:
|
|
power_level_content["users"][invitee] = 100
|
|
|
|
if power_level_content_override:
|
|
power_level_content.update(power_level_content_override)
|
|
|
|
yield send(
|
|
etype=EventTypes.PowerLevels,
|
|
content=power_level_content,
|
|
)
|
|
|
|
if room_alias and (EventTypes.CanonicalAlias, '') not in initial_state:
|
|
yield send(
|
|
etype=EventTypes.CanonicalAlias,
|
|
content={"alias": room_alias.to_string()},
|
|
)
|
|
|
|
if (EventTypes.JoinRules, '') not in initial_state:
|
|
yield send(
|
|
etype=EventTypes.JoinRules,
|
|
content={"join_rule": config["join_rules"]},
|
|
)
|
|
|
|
if (EventTypes.RoomHistoryVisibility, '') not in initial_state:
|
|
yield send(
|
|
etype=EventTypes.RoomHistoryVisibility,
|
|
content={"history_visibility": config["history_visibility"]}
|
|
)
|
|
|
|
if config["guest_can_join"]:
|
|
if (EventTypes.GuestAccess, '') not in initial_state:
|
|
yield send(
|
|
etype=EventTypes.GuestAccess,
|
|
content={"guest_access": "can_join"}
|
|
)
|
|
|
|
for (etype, state_key), content in initial_state.items():
|
|
yield send(
|
|
etype=etype,
|
|
state_key=state_key,
|
|
content=content,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _generate_room_id(self, creator_id, is_public):
|
|
# autogen room IDs and try to create it. We may clash, so just
|
|
# try a few times till one goes through, giving up eventually.
|
|
attempts = 0
|
|
while attempts < 5:
|
|
try:
|
|
random_string = stringutils.random_string(18)
|
|
gen_room_id = RoomID(
|
|
random_string,
|
|
self.hs.hostname,
|
|
).to_string()
|
|
if isinstance(gen_room_id, bytes):
|
|
gen_room_id = gen_room_id.decode('utf-8')
|
|
yield self.store.store_room(
|
|
room_id=gen_room_id,
|
|
room_creator_user_id=creator_id,
|
|
is_public=is_public,
|
|
)
|
|
defer.returnValue(gen_room_id)
|
|
except StoreError:
|
|
attempts += 1
|
|
raise StoreError(500, "Couldn't generate a room ID.")
|
|
|
|
|
|
class RoomContextHandler(object):
|
|
def __init__(self, hs):
|
|
self.hs = hs
|
|
self.store = hs.get_datastore()
|
|
|
|
@defer.inlineCallbacks
|
|
def get_event_context(self, user, room_id, event_id, limit, event_filter):
|
|
"""Retrieves events, pagination tokens and state around a given event
|
|
in a room.
|
|
|
|
Args:
|
|
user (UserID)
|
|
room_id (str)
|
|
event_id (str)
|
|
limit (int): The maximum number of events to return in total
|
|
(excluding state).
|
|
event_filter (Filter|None): the filter to apply to the events returned
|
|
(excluding the target event_id)
|
|
|
|
Returns:
|
|
dict, or None if the event isn't found
|
|
"""
|
|
before_limit = math.floor(limit / 2.)
|
|
after_limit = limit - before_limit
|
|
|
|
users = yield self.store.get_users_in_room(room_id)
|
|
is_peeking = user.to_string() not in users
|
|
|
|
def filter_evts(events):
|
|
return filter_events_for_client(
|
|
self.store,
|
|
user.to_string(),
|
|
events,
|
|
is_peeking=is_peeking
|
|
)
|
|
|
|
event = yield self.store.get_event(event_id, get_prev_content=True,
|
|
allow_none=True)
|
|
if not event:
|
|
defer.returnValue(None)
|
|
return
|
|
|
|
filtered = yield(filter_evts([event]))
|
|
if not filtered:
|
|
raise AuthError(
|
|
403,
|
|
"You don't have permission to access that event."
|
|
)
|
|
|
|
results = yield self.store.get_events_around(
|
|
room_id, event_id, before_limit, after_limit, event_filter
|
|
)
|
|
|
|
results["events_before"] = yield filter_evts(results["events_before"])
|
|
results["events_after"] = yield filter_evts(results["events_after"])
|
|
results["event"] = event
|
|
|
|
if results["events_after"]:
|
|
last_event_id = results["events_after"][-1].event_id
|
|
else:
|
|
last_event_id = event_id
|
|
|
|
if event_filter and event_filter.lazy_load_members():
|
|
state_filter = StateFilter.from_lazy_load_member_list(
|
|
ev.sender
|
|
for ev in itertools.chain(
|
|
results["events_before"],
|
|
(results["event"],),
|
|
results["events_after"],
|
|
)
|
|
)
|
|
else:
|
|
state_filter = StateFilter.all()
|
|
|
|
# XXX: why do we return the state as of the last event rather than the
|
|
# first? Shouldn't we be consistent with /sync?
|
|
# https://github.com/matrix-org/matrix-doc/issues/687
|
|
|
|
state = yield self.store.get_state_for_events(
|
|
[last_event_id], state_filter=state_filter,
|
|
)
|
|
results["state"] = list(state[last_event_id].values())
|
|
|
|
# We use a dummy token here as we only care about the room portion of
|
|
# the token, which we replace.
|
|
token = StreamToken.START
|
|
|
|
results["start"] = token.copy_and_replace(
|
|
"room_key", results["start"]
|
|
).to_string()
|
|
|
|
results["end"] = token.copy_and_replace(
|
|
"room_key", results["end"]
|
|
).to_string()
|
|
|
|
defer.returnValue(results)
|
|
|
|
|
|
class RoomEventSource(object):
|
|
def __init__(self, hs):
|
|
self.store = hs.get_datastore()
|
|
|
|
@defer.inlineCallbacks
|
|
def get_new_events(
|
|
self,
|
|
user,
|
|
from_key,
|
|
limit,
|
|
room_ids,
|
|
is_guest,
|
|
explicit_room_id=None,
|
|
):
|
|
# We just ignore the key for now.
|
|
|
|
to_key = yield self.get_current_key()
|
|
|
|
from_token = RoomStreamToken.parse(from_key)
|
|
if from_token.topological:
|
|
logger.warn("Stream has topological part!!!! %r", from_key)
|
|
from_key = "s%s" % (from_token.stream,)
|
|
|
|
app_service = self.store.get_app_service_by_user_id(
|
|
user.to_string()
|
|
)
|
|
if app_service:
|
|
# We no longer support AS users using /sync directly.
|
|
# See https://github.com/matrix-org/matrix-doc/issues/1144
|
|
raise NotImplementedError()
|
|
else:
|
|
room_events = yield self.store.get_membership_changes_for_user(
|
|
user.to_string(), from_key, to_key
|
|
)
|
|
|
|
room_to_events = yield self.store.get_room_events_stream_for_rooms(
|
|
room_ids=room_ids,
|
|
from_key=from_key,
|
|
to_key=to_key,
|
|
limit=limit or 10,
|
|
order='ASC',
|
|
)
|
|
|
|
events = list(room_events)
|
|
events.extend(e for evs, _ in room_to_events.values() for e in evs)
|
|
|
|
events.sort(key=lambda e: e.internal_metadata.order)
|
|
|
|
if limit:
|
|
events[:] = events[:limit]
|
|
|
|
if events:
|
|
end_key = events[-1].internal_metadata.after
|
|
else:
|
|
end_key = to_key
|
|
|
|
defer.returnValue((events, end_key))
|
|
|
|
def get_current_key(self):
|
|
return self.store.get_room_events_max_id()
|
|
|
|
def get_current_key_for_room(self, room_id):
|
|
return self.store.get_room_events_max_id(room_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_pagination_rows(self, user, config, key):
|
|
events, next_key = yield self.store.paginate_room_events(
|
|
room_id=key,
|
|
from_key=config.from_key,
|
|
to_key=config.to_key,
|
|
direction=config.direction,
|
|
limit=config.limit,
|
|
)
|
|
|
|
defer.returnValue((events, next_key))
|