mirror of
https://git.anonymousland.org/anonymousland/synapse.git
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692 lines
24 KiB
Python
692 lines
24 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 OpenMarket 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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from ._base import BaseHandler
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from synapse.streams.config import PaginationConfig
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from synapse.api.constants import Membership, EventTypes
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from twisted.internet import defer
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import collections
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import logging
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logger = logging.getLogger(__name__)
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SyncConfig = collections.namedtuple("SyncConfig", [
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"user",
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"filter",
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])
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class TimelineBatch(collections.namedtuple("TimelineBatch", [
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"prev_batch",
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"events",
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"limited",
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])):
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__slots__ = []
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def __nonzero__(self):
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"""Make the result appear empty if there are no updates. This is used
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to tell if room needs to be part of the sync result.
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"""
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return bool(self.events)
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class JoinedSyncResult(collections.namedtuple("JoinedSyncResult", [
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"room_id",
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"timeline",
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"state",
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"ephemeral",
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"private_user_data",
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])):
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__slots__ = []
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def __nonzero__(self):
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"""Make the result appear empty if there are no updates. This is used
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to tell if room needs to be part of the sync result.
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"""
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return bool(
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self.timeline
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or self.state
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or self.ephemeral
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or self.private_user_data
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)
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class ArchivedSyncResult(collections.namedtuple("JoinedSyncResult", [
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"room_id",
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"timeline",
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"state",
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"private_user_data",
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])):
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__slots__ = []
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def __nonzero__(self):
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"""Make the result appear empty if there are no updates. This is used
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to tell if room needs to be part of the sync result.
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"""
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return bool(
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self.timeline
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or self.state
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or self.private_user_data
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)
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class InvitedSyncResult(collections.namedtuple("InvitedSyncResult", [
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"room_id",
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"invite",
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])):
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__slots__ = []
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def __nonzero__(self):
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"""Invited rooms should always be reported to the client"""
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return True
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class SyncResult(collections.namedtuple("SyncResult", [
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"next_batch", # Token for the next sync
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"presence", # List of presence events for the user.
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"joined", # JoinedSyncResult for each joined room.
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"invited", # InvitedSyncResult for each invited room.
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"archived", # ArchivedSyncResult for each archived room.
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])):
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__slots__ = []
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def __nonzero__(self):
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"""Make the result appear empty if there are no updates. This is used
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to tell if the notifier needs to wait for more events when polling for
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events.
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"""
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return bool(
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self.presence or self.joined or self.invited
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)
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class SyncHandler(BaseHandler):
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def __init__(self, hs):
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super(SyncHandler, self).__init__(hs)
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self.event_sources = hs.get_event_sources()
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self.clock = hs.get_clock()
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@defer.inlineCallbacks
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def wait_for_sync_for_user(self, sync_config, since_token=None, timeout=0,
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full_state=False):
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"""Get the sync for a client if we have new data for it now. Otherwise
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wait for new data to arrive on the server. If the timeout expires, then
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return an empty sync result.
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Returns:
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A Deferred SyncResult.
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"""
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if timeout == 0 or since_token is None or full_state:
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# we are going to return immediately, so don't bother calling
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# notifier.wait_for_events.
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result = yield self.current_sync_for_user(sync_config, since_token,
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full_state=full_state)
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defer.returnValue(result)
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else:
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def current_sync_callback(before_token, after_token):
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return self.current_sync_for_user(sync_config, since_token)
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rm_handler = self.hs.get_handlers().room_member_handler
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app_service = yield self.store.get_app_service_by_user_id(
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sync_config.user.to_string()
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)
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if app_service:
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rooms = yield self.store.get_app_service_rooms(app_service)
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room_ids = set(r.room_id for r in rooms)
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else:
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room_ids = yield rm_handler.get_joined_rooms_for_user(
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sync_config.user
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)
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result = yield self.notifier.wait_for_events(
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sync_config.user, room_ids, timeout, current_sync_callback,
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from_token=since_token
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)
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defer.returnValue(result)
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def current_sync_for_user(self, sync_config, since_token=None,
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full_state=False):
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"""Get the sync for client needed to match what the server has now.
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Returns:
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A Deferred SyncResult.
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"""
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if since_token is None or full_state:
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return self.full_state_sync(sync_config, since_token)
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else:
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return self.incremental_sync_with_gap(sync_config, since_token)
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@defer.inlineCallbacks
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def full_state_sync(self, sync_config, timeline_since_token):
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"""Get a sync for a client which is starting without any state.
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If a 'message_since_token' is given, only timeline events which have
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happened since that token will be returned.
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Returns:
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A Deferred SyncResult.
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"""
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now_token = yield self.event_sources.get_current_token()
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now_token, typing_by_room = yield self.typing_by_room(
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sync_config, now_token
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)
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presence_stream = self.event_sources.sources["presence"]
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# TODO (mjark): This looks wrong, shouldn't we be getting the presence
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# UP to the present rather than after the present?
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pagination_config = PaginationConfig(from_token=now_token)
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presence, _ = yield presence_stream.get_pagination_rows(
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user=sync_config.user,
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pagination_config=pagination_config.get_source_config("presence"),
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key=None
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)
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room_list = yield self.store.get_rooms_for_user_where_membership_is(
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user_id=sync_config.user.to_string(),
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membership_list=(
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Membership.INVITE,
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Membership.JOIN,
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Membership.LEAVE,
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Membership.BAN
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)
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)
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tags_by_room = yield self.store.get_tags_for_user(
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sync_config.user.to_string()
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)
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joined = []
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invited = []
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archived = []
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for event in room_list:
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if event.membership == Membership.JOIN:
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room_sync = yield self.full_state_sync_for_joined_room(
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room_id=event.room_id,
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sync_config=sync_config,
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now_token=now_token,
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timeline_since_token=timeline_since_token,
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typing_by_room=typing_by_room,
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tags_by_room=tags_by_room,
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)
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joined.append(room_sync)
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elif event.membership == Membership.INVITE:
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invite = yield self.store.get_event(event.event_id)
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invited.append(InvitedSyncResult(
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room_id=event.room_id,
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invite=invite,
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))
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elif event.membership in (Membership.LEAVE, Membership.BAN):
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leave_token = now_token.copy_and_replace(
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"room_key", "s%d" % (event.stream_ordering,)
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)
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room_sync = yield self.full_state_sync_for_archived_room(
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sync_config=sync_config,
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room_id=event.room_id,
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leave_event_id=event.event_id,
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leave_token=leave_token,
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timeline_since_token=timeline_since_token,
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tags_by_room=tags_by_room,
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)
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archived.append(room_sync)
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defer.returnValue(SyncResult(
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presence=presence,
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joined=joined,
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invited=invited,
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archived=archived,
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next_batch=now_token,
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))
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@defer.inlineCallbacks
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def full_state_sync_for_joined_room(self, room_id, sync_config,
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now_token, timeline_since_token,
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typing_by_room, tags_by_room):
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"""Sync a room for a client which is starting without any state
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Returns:
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A Deferred JoinedSyncResult.
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"""
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batch = yield self.load_filtered_recents(
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room_id, sync_config, now_token, since_token=timeline_since_token
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)
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current_state = yield self.state_handler.get_current_state(
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room_id
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)
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current_state_events = current_state.values()
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defer.returnValue(JoinedSyncResult(
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room_id=room_id,
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timeline=batch,
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state=current_state_events,
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ephemeral=typing_by_room.get(room_id, []),
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private_user_data=self.private_user_data_for_room(
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room_id, tags_by_room
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),
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))
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def private_user_data_for_room(self, room_id, tags_by_room):
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private_user_data = []
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tags = tags_by_room.get(room_id)
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if tags:
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private_user_data.append({
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"type": "m.tag",
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"content": {"tags": tags},
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})
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return private_user_data
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@defer.inlineCallbacks
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def typing_by_room(self, sync_config, now_token, since_token=None):
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"""Get the typing events for each room the user is in
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Args:
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sync_config (SyncConfig): The flags, filters and user for the sync.
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now_token (StreamToken): Where the server is currently up to.
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since_token (StreamToken): Where the server was when the client
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last synced.
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Returns:
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A tuple of the now StreamToken, updated to reflect the which typing
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events are included, and a dict mapping from room_id to a list of
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typing events for that room.
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"""
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typing_key = since_token.typing_key if since_token else "0"
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typing_source = self.event_sources.sources["typing"]
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typing, typing_key = yield typing_source.get_new_events_for_user(
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user=sync_config.user,
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from_key=typing_key,
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limit=sync_config.filter.ephemeral_limit(),
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)
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now_token = now_token.copy_and_replace("typing_key", typing_key)
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typing_by_room = {event["room_id"]: [event] for event in typing}
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for event in typing:
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event.pop("room_id")
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logger.debug("Typing %r", typing_by_room)
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defer.returnValue((now_token, typing_by_room))
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@defer.inlineCallbacks
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def full_state_sync_for_archived_room(self, room_id, sync_config,
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leave_event_id, leave_token,
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timeline_since_token, tags_by_room):
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"""Sync a room for a client which is starting without any state
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Returns:
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A Deferred JoinedSyncResult.
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"""
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batch = yield self.load_filtered_recents(
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room_id, sync_config, leave_token, since_token=timeline_since_token
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)
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leave_state = yield self.store.get_state_for_events(
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[leave_event_id], None
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)
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defer.returnValue(ArchivedSyncResult(
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room_id=room_id,
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timeline=batch,
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state=leave_state[leave_event_id].values(),
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private_user_data=self.private_user_data_for_room(
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room_id, tags_by_room
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),
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))
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@defer.inlineCallbacks
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def incremental_sync_with_gap(self, sync_config, since_token):
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""" Get the incremental delta needed to bring the client up to
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date with the server.
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Returns:
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A Deferred SyncResult.
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"""
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now_token = yield self.event_sources.get_current_token()
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presence_source = self.event_sources.sources["presence"]
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presence, presence_key = yield presence_source.get_new_events_for_user(
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user=sync_config.user,
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from_key=since_token.presence_key,
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limit=sync_config.filter.presence_limit(),
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)
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now_token = now_token.copy_and_replace("presence_key", presence_key)
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now_token, typing_by_room = yield self.typing_by_room(
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sync_config, now_token, since_token
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)
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rm_handler = self.hs.get_handlers().room_member_handler
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app_service = yield self.store.get_app_service_by_user_id(
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sync_config.user.to_string()
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)
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if app_service:
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rooms = yield self.store.get_app_service_rooms(app_service)
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joined_room_ids = set(r.room_id for r in rooms)
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else:
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joined_room_ids = yield rm_handler.get_joined_rooms_for_user(
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sync_config.user
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)
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timeline_limit = sync_config.filter.timeline_limit()
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room_events, _ = yield self.store.get_room_events_stream(
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sync_config.user.to_string(),
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from_key=since_token.room_key,
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to_key=now_token.room_key,
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room_id=None,
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limit=timeline_limit + 1,
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)
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tags_by_room = yield self.store.get_updated_tags(
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sync_config.user.to_string(),
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since_token.private_user_data_key,
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)
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joined = []
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archived = []
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if len(room_events) <= timeline_limit:
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# There is no gap in any of the rooms. Therefore we can just
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# partition the new events by room and return them.
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invite_events = []
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leave_events = []
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events_by_room_id = {}
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for event in room_events:
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events_by_room_id.setdefault(event.room_id, []).append(event)
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if event.room_id not in joined_room_ids:
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if (event.type == EventTypes.Member
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and event.state_key == sync_config.user.to_string()):
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if event.membership == Membership.INVITE:
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invite_events.append(event)
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elif event.membership in (Membership.LEAVE, Membership.BAN):
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leave_events.append(event)
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for room_id in joined_room_ids:
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recents = events_by_room_id.get(room_id, [])
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state = [event for event in recents if event.is_state()]
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if recents:
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prev_batch = now_token.copy_and_replace(
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"room_key", recents[0].internal_metadata.before
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)
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else:
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prev_batch = now_token
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state, limited = yield self.check_joined_room(
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sync_config, room_id, state
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)
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room_sync = JoinedSyncResult(
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room_id=room_id,
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timeline=TimelineBatch(
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events=recents,
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prev_batch=prev_batch,
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limited=limited,
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),
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state=state,
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ephemeral=typing_by_room.get(room_id, []),
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private_user_data=self.private_user_data_for_room(
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room_id, tags_by_room
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),
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)
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if room_sync:
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joined.append(room_sync)
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else:
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invite_events = yield self.store.get_invites_for_user(
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sync_config.user.to_string()
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)
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leave_events = yield self.store.get_leave_and_ban_events_for_user(
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sync_config.user.to_string()
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)
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for room_id in joined_room_ids:
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room_sync = yield self.incremental_sync_with_gap_for_room(
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room_id, sync_config, since_token, now_token,
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typing_by_room, tags_by_room
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)
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if room_sync:
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joined.append(room_sync)
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for leave_event in leave_events:
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room_sync = yield self.incremental_sync_for_archived_room(
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sync_config, leave_event, since_token, tags_by_room
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)
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archived.append(room_sync)
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invited = [
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InvitedSyncResult(room_id=event.room_id, invite=event)
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for event in invite_events
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]
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defer.returnValue(SyncResult(
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presence=presence,
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joined=joined,
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invited=invited,
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archived=archived,
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next_batch=now_token,
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))
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@defer.inlineCallbacks
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def load_filtered_recents(self, room_id, sync_config, now_token,
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since_token=None):
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limited = True
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recents = []
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filtering_factor = 2
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timeline_limit = sync_config.filter.timeline_limit()
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load_limit = max(timeline_limit * filtering_factor, 100)
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max_repeat = 3 # Only try a few times per room, otherwise
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room_key = now_token.room_key
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end_key = room_key
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while limited and len(recents) < timeline_limit and max_repeat:
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events, keys = yield self.store.get_recent_events_for_room(
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room_id,
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limit=load_limit + 1,
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from_token=since_token.room_key if since_token else None,
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end_token=end_key,
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)
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(room_key, _) = keys
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end_key = "s" + room_key.split('-')[-1]
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loaded_recents = sync_config.filter.filter_room_timeline(events)
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loaded_recents = yield self._filter_events_for_client(
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sync_config.user.to_string(), loaded_recents,
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)
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loaded_recents.extend(recents)
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recents = loaded_recents
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if len(events) <= load_limit:
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limited = False
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max_repeat -= 1
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|
|
if len(recents) > timeline_limit:
|
|
limited = True
|
|
recents = recents[-timeline_limit:]
|
|
room_key = recents[0].internal_metadata.before
|
|
|
|
prev_batch_token = now_token.copy_and_replace(
|
|
"room_key", room_key
|
|
)
|
|
|
|
defer.returnValue(TimelineBatch(
|
|
events=recents, prev_batch=prev_batch_token, limited=limited
|
|
))
|
|
|
|
@defer.inlineCallbacks
|
|
def incremental_sync_with_gap_for_room(self, room_id, sync_config,
|
|
since_token, now_token,
|
|
typing_by_room, tags_by_room):
|
|
""" Get the incremental delta needed to bring the client up to date for
|
|
the room. Gives the client the most recent events and the changes to
|
|
state.
|
|
Returns:
|
|
A Deferred JoinedSyncResult
|
|
"""
|
|
|
|
# TODO(mjark): Check for redactions we might have missed.
|
|
|
|
batch = yield self.load_filtered_recents(
|
|
room_id, sync_config, now_token, since_token,
|
|
)
|
|
|
|
logging.debug("Recents %r", batch)
|
|
|
|
# TODO(mjark): This seems racy since this isn't being passed a
|
|
# token to indicate what point in the stream this is
|
|
current_state = yield self.state_handler.get_current_state(
|
|
room_id
|
|
)
|
|
current_state_events = current_state.values()
|
|
|
|
state_at_previous_sync = yield self.get_state_at_previous_sync(
|
|
room_id, since_token=since_token
|
|
)
|
|
|
|
state_events_delta = yield self.compute_state_delta(
|
|
since_token=since_token,
|
|
previous_state=state_at_previous_sync,
|
|
current_state=current_state_events,
|
|
)
|
|
|
|
state_events_delta, _ = yield self.check_joined_room(
|
|
sync_config, room_id, state_events_delta
|
|
)
|
|
|
|
room_sync = JoinedSyncResult(
|
|
room_id=room_id,
|
|
timeline=batch,
|
|
state=state_events_delta,
|
|
ephemeral=typing_by_room.get(room_id, []),
|
|
private_user_data=self.private_user_data_for_room(
|
|
room_id, tags_by_room
|
|
),
|
|
)
|
|
|
|
logging.debug("Room sync: %r", room_sync)
|
|
|
|
defer.returnValue(room_sync)
|
|
|
|
@defer.inlineCallbacks
|
|
def incremental_sync_for_archived_room(self, sync_config, leave_event,
|
|
since_token, tags_by_room):
|
|
""" Get the incremental delta needed to bring the client up to date for
|
|
the archived room.
|
|
Returns:
|
|
A Deferred ArchivedSyncResult
|
|
"""
|
|
|
|
stream_token = yield self.store.get_stream_token_for_event(
|
|
leave_event.event_id
|
|
)
|
|
|
|
leave_token = since_token.copy_and_replace("room_key", stream_token)
|
|
|
|
batch = yield self.load_filtered_recents(
|
|
leave_event.room_id, sync_config, leave_token, since_token,
|
|
)
|
|
|
|
logging.debug("Recents %r", batch)
|
|
|
|
# TODO(mjark): This seems racy since this isn't being passed a
|
|
# token to indicate what point in the stream this is
|
|
leave_state = yield self.store.get_state_for_events(
|
|
[leave_event.event_id], None
|
|
)
|
|
|
|
state_events_at_leave = leave_state[leave_event.event_id].values()
|
|
|
|
state_at_previous_sync = yield self.get_state_at_previous_sync(
|
|
leave_event.room_id, since_token=since_token
|
|
)
|
|
|
|
state_events_delta = yield self.compute_state_delta(
|
|
since_token=since_token,
|
|
previous_state=state_at_previous_sync,
|
|
current_state=state_events_at_leave,
|
|
)
|
|
|
|
room_sync = ArchivedSyncResult(
|
|
room_id=leave_event.room_id,
|
|
timeline=batch,
|
|
state=state_events_delta,
|
|
private_user_data=self.private_user_data_for_room(
|
|
leave_event.room_id, tags_by_room
|
|
),
|
|
)
|
|
|
|
logging.debug("Room sync: %r", room_sync)
|
|
|
|
defer.returnValue(room_sync)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_state_at_previous_sync(self, room_id, since_token):
|
|
""" Get the room state at the previous sync the client made.
|
|
Returns:
|
|
A Deferred list of Events.
|
|
"""
|
|
last_events, token = yield self.store.get_recent_events_for_room(
|
|
room_id, end_token=since_token.room_key, limit=1,
|
|
)
|
|
|
|
if last_events:
|
|
last_event = last_events[0]
|
|
last_context = yield self.state_handler.compute_event_context(
|
|
last_event
|
|
)
|
|
if last_event.is_state():
|
|
state = [last_event] + last_context.current_state.values()
|
|
else:
|
|
state = last_context.current_state.values()
|
|
else:
|
|
state = ()
|
|
defer.returnValue(state)
|
|
|
|
def compute_state_delta(self, since_token, previous_state, current_state):
|
|
""" Works out the differnce in state between the current state and the
|
|
state the client got when it last performed a sync.
|
|
Returns:
|
|
A list of events.
|
|
"""
|
|
# TODO(mjark) Check if the state events were received by the server
|
|
# after the previous sync, since we need to include those state
|
|
# updates even if they occured logically before the previous event.
|
|
# TODO(mjark) Check for new redactions in the state events.
|
|
previous_dict = {event.event_id: event for event in previous_state}
|
|
state_delta = []
|
|
for event in current_state:
|
|
if event.event_id not in previous_dict:
|
|
state_delta.append(event)
|
|
return state_delta
|
|
|
|
@defer.inlineCallbacks
|
|
def check_joined_room(self, sync_config, room_id, state_delta):
|
|
joined = False
|
|
limited = False
|
|
for event in state_delta:
|
|
if (
|
|
event.type == EventTypes.Member
|
|
and event.state_key == sync_config.user.to_string()
|
|
):
|
|
if event.content["membership"] == Membership.JOIN:
|
|
joined = True
|
|
|
|
if joined:
|
|
res = yield self.state_handler.get_current_state(room_id)
|
|
state_delta = res.values()
|
|
limited = True
|
|
|
|
defer.returnValue((state_delta, limited))
|