727 lines
25 KiB
Python
727 lines
25 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 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 twisted.internet import defer
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from synapse.api.constants import EventTypes, Membership
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from synapse.api.errors import AuthError, Codes, SynapseError
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from synapse.streams.config import PaginationConfig
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from synapse.events.utils import serialize_event
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from synapse.events.validator import EventValidator
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from synapse.util import unwrapFirstError
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from synapse.util.async import concurrently_execute
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from synapse.util.caches.snapshot_cache import SnapshotCache
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from synapse.types import UserID, RoomStreamToken, StreamToken
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from ._base import BaseHandler
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from canonicaljson import encode_canonical_json
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import logging
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logger = logging.getLogger(__name__)
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class MessageHandler(BaseHandler):
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def __init__(self, hs):
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super(MessageHandler, self).__init__(hs)
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self.hs = hs
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self.state = hs.get_state_handler()
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self.clock = hs.get_clock()
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self.validator = EventValidator()
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self.snapshot_cache = SnapshotCache()
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@defer.inlineCallbacks
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def get_messages(self, requester, room_id=None, pagin_config=None,
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as_client_event=True):
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"""Get messages in a room.
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Args:
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requester (Requester): The user requesting messages.
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room_id (str): The room they want messages from.
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pagin_config (synapse.api.streams.PaginationConfig): The pagination
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config rules to apply, if any.
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as_client_event (bool): True to get events in client-server format.
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Returns:
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dict: Pagination API results
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"""
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user_id = requester.user.to_string()
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data_source = self.hs.get_event_sources().sources["room"]
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if pagin_config.from_token:
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room_token = pagin_config.from_token.room_key
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else:
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pagin_config.from_token = (
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yield self.hs.get_event_sources().get_current_token(
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direction='b'
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)
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)
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room_token = pagin_config.from_token.room_key
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room_token = RoomStreamToken.parse(room_token)
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pagin_config.from_token = pagin_config.from_token.copy_and_replace(
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"room_key", str(room_token)
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)
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source_config = pagin_config.get_source_config("room")
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membership, member_event_id = yield self._check_in_room_or_world_readable(
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room_id, user_id
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)
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if source_config.direction == 'b':
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# if we're going backwards, we might need to backfill. This
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# requires that we have a topo token.
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if room_token.topological:
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max_topo = room_token.topological
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else:
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max_topo = yield self.store.get_max_topological_token_for_stream_and_room(
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room_id, room_token.stream
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)
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if membership == Membership.LEAVE:
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# If they have left the room then clamp the token to be before
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# they left the room, to save the effort of loading from the
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# database.
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leave_token = yield self.store.get_topological_token_for_event(
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member_event_id
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)
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leave_token = RoomStreamToken.parse(leave_token)
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if leave_token.topological < max_topo:
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source_config.from_key = str(leave_token)
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yield self.hs.get_handlers().federation_handler.maybe_backfill(
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room_id, max_topo
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)
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events, next_key = yield data_source.get_pagination_rows(
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requester.user, source_config, room_id
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)
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next_token = pagin_config.from_token.copy_and_replace(
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"room_key", next_key
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)
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if not events:
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defer.returnValue({
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"chunk": [],
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"start": pagin_config.from_token.to_string(),
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"end": next_token.to_string(),
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})
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events = yield self.filter_events_for_client(
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user_id,
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events,
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is_peeking=(member_event_id is None),
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)
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time_now = self.clock.time_msec()
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chunk = {
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"chunk": [
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serialize_event(e, time_now, as_client_event)
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for e in events
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],
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"start": pagin_config.from_token.to_string(),
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"end": next_token.to_string(),
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}
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defer.returnValue(chunk)
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@defer.inlineCallbacks
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def create_event(self, event_dict, token_id=None, txn_id=None, prev_event_ids=None):
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"""
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Given a dict from a client, create a new event.
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Creates an FrozenEvent object, filling out auth_events, prev_events,
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etc.
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Adds display names to Join membership events.
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Args:
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event_dict (dict): An entire event
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token_id (str)
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txn_id (str)
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prev_event_ids (list): The prev event ids to use when creating the event
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Returns:
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Tuple of created event (FrozenEvent), Context
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"""
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builder = self.event_builder_factory.new(event_dict)
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self.validator.validate_new(builder)
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if builder.type == EventTypes.Member:
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membership = builder.content.get("membership", None)
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target = UserID.from_string(builder.state_key)
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if membership in {Membership.JOIN, Membership.INVITE}:
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# If event doesn't include a display name, add one.
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profile = self.hs.get_handlers().profile_handler
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content = builder.content
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try:
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content["displayname"] = yield profile.get_displayname(target)
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content["avatar_url"] = yield profile.get_avatar_url(target)
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except Exception as e:
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logger.info(
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"Failed to get profile information for %r: %s",
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target, e
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)
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if token_id is not None:
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builder.internal_metadata.token_id = token_id
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if txn_id is not None:
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builder.internal_metadata.txn_id = txn_id
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event, context = yield self._create_new_client_event(
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builder=builder,
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prev_event_ids=prev_event_ids,
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)
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defer.returnValue((event, context))
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@defer.inlineCallbacks
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def send_nonmember_event(self, requester, event, context, ratelimit=True):
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"""
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Persists and notifies local clients and federation of an event.
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Args:
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event (FrozenEvent) the event to send.
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context (Context) the context of the event.
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ratelimit (bool): Whether to rate limit this send.
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is_guest (bool): Whether the sender is a guest.
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"""
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if event.type == EventTypes.Member:
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raise SynapseError(
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500,
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"Tried to send member event through non-member codepath"
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)
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user = UserID.from_string(event.sender)
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assert self.hs.is_mine(user), "User must be our own: %s" % (user,)
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if event.is_state():
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prev_state = self.deduplicate_state_event(event, context)
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if prev_state is not None:
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defer.returnValue(prev_state)
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yield self.handle_new_client_event(
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requester=requester,
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event=event,
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context=context,
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ratelimit=ratelimit,
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)
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if event.type == EventTypes.Message:
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presence = self.hs.get_handlers().presence_handler
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yield presence.bump_presence_active_time(user)
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def deduplicate_state_event(self, event, context):
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"""
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Checks whether event is in the latest resolved state in context.
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If so, returns the version of the event in context.
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Otherwise, returns None.
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"""
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prev_event = context.current_state.get((event.type, event.state_key))
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if prev_event and event.user_id == prev_event.user_id:
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prev_content = encode_canonical_json(prev_event.content)
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next_content = encode_canonical_json(event.content)
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if prev_content == next_content:
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return prev_event
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return None
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@defer.inlineCallbacks
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def create_and_send_nonmember_event(
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self,
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requester,
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event_dict,
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ratelimit=True,
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txn_id=None
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):
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"""
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Creates an event, then sends it.
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See self.create_event and self.send_nonmember_event.
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"""
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event, context = yield self.create_event(
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event_dict,
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token_id=requester.access_token_id,
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txn_id=txn_id
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)
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yield self.send_nonmember_event(
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requester,
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event,
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context,
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ratelimit=ratelimit,
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)
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defer.returnValue(event)
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@defer.inlineCallbacks
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def get_room_data(self, user_id=None, room_id=None,
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event_type=None, state_key="", is_guest=False):
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""" Get data from a room.
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Args:
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event : The room path event
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Returns:
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The path data content.
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Raises:
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SynapseError if something went wrong.
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"""
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membership, membership_event_id = yield self._check_in_room_or_world_readable(
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room_id, user_id
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)
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if membership == Membership.JOIN:
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data = yield self.state_handler.get_current_state(
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room_id, event_type, state_key
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)
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elif membership == Membership.LEAVE:
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key = (event_type, state_key)
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room_state = yield self.store.get_state_for_events(
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[membership_event_id], [key]
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)
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data = room_state[membership_event_id].get(key)
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defer.returnValue(data)
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@defer.inlineCallbacks
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def _check_in_room_or_world_readable(self, room_id, user_id):
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try:
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# check_user_was_in_room will return the most recent membership
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# event for the user if:
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# * The user is a non-guest user, and was ever in the room
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# * The user is a guest user, and has joined the room
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# else it will throw.
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member_event = yield self.auth.check_user_was_in_room(room_id, user_id)
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defer.returnValue((member_event.membership, member_event.event_id))
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return
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except AuthError:
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visibility = yield self.state_handler.get_current_state(
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room_id, EventTypes.RoomHistoryVisibility, ""
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)
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if (
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visibility and
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visibility.content["history_visibility"] == "world_readable"
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):
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defer.returnValue((Membership.JOIN, None))
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return
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raise AuthError(
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403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN
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)
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@defer.inlineCallbacks
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def get_state_events(self, user_id, room_id, is_guest=False):
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"""Retrieve all state events for a given room. If the user is
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joined to the room then return the current state. If the user has
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left the room return the state events from when they left.
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Args:
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user_id(str): The user requesting state events.
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room_id(str): The room ID to get all state events from.
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Returns:
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A list of dicts representing state events. [{}, {}, {}]
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"""
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membership, membership_event_id = yield self._check_in_room_or_world_readable(
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room_id, user_id
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)
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if membership == Membership.JOIN:
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room_state = yield self.state_handler.get_current_state(room_id)
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elif membership == Membership.LEAVE:
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room_state = yield self.store.get_state_for_events(
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[membership_event_id], None
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)
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room_state = room_state[membership_event_id]
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now = self.clock.time_msec()
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defer.returnValue(
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[serialize_event(c, now) for c in room_state.values()]
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)
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def snapshot_all_rooms(self, user_id=None, pagin_config=None,
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as_client_event=True, include_archived=False):
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"""Retrieve a snapshot of all rooms the user is invited or has joined.
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This snapshot may include messages for all rooms where the user is
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joined, depending on the pagination config.
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Args:
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user_id (str): The ID of the user making the request.
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pagin_config (synapse.api.streams.PaginationConfig): The pagination
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config used to determine how many messages *PER ROOM* to return.
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as_client_event (bool): True to get events in client-server format.
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include_archived (bool): True to get rooms that the user has left
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Returns:
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A list of dicts with "room_id" and "membership" keys for all rooms
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the user is currently invited or joined in on. Rooms where the user
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is joined on, may return a "messages" key with messages, depending
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on the specified PaginationConfig.
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"""
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key = (
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user_id,
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pagin_config.from_token,
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pagin_config.to_token,
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pagin_config.direction,
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pagin_config.limit,
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as_client_event,
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include_archived,
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)
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now_ms = self.clock.time_msec()
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result = self.snapshot_cache.get(now_ms, key)
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if result is not None:
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return result
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return self.snapshot_cache.set(now_ms, key, self._snapshot_all_rooms(
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user_id, pagin_config, as_client_event, include_archived
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))
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@defer.inlineCallbacks
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def _snapshot_all_rooms(self, user_id=None, pagin_config=None,
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as_client_event=True, include_archived=False):
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memberships = [Membership.INVITE, Membership.JOIN]
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if include_archived:
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memberships.append(Membership.LEAVE)
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room_list = yield self.store.get_rooms_for_user_where_membership_is(
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user_id=user_id, membership_list=memberships
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)
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user = UserID.from_string(user_id)
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rooms_ret = []
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now_token = yield self.hs.get_event_sources().get_current_token()
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presence_stream = self.hs.get_event_sources().sources["presence"]
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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, pagination_config.get_source_config("presence"), None
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)
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receipt_stream = self.hs.get_event_sources().sources["receipt"]
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receipt, _ = yield receipt_stream.get_pagination_rows(
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user, pagination_config.get_source_config("receipt"), None
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)
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tags_by_room = yield self.store.get_tags_for_user(user_id)
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account_data, account_data_by_room = (
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yield self.store.get_account_data_for_user(user_id)
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)
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public_room_ids = yield self.store.get_public_room_ids()
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limit = pagin_config.limit
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if limit is None:
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limit = 10
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@defer.inlineCallbacks
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def handle_room(event):
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d = {
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"room_id": event.room_id,
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"membership": event.membership,
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"visibility": (
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"public" if event.room_id in public_room_ids
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else "private"
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),
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}
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if event.membership == Membership.INVITE:
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time_now = self.clock.time_msec()
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d["inviter"] = event.sender
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invite_event = yield self.store.get_event(event.event_id)
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d["invite"] = serialize_event(invite_event, time_now, as_client_event)
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rooms_ret.append(d)
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if event.membership not in (Membership.JOIN, Membership.LEAVE):
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return
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try:
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if event.membership == Membership.JOIN:
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room_end_token = now_token.room_key
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deferred_room_state = self.state_handler.get_current_state(
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event.room_id
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)
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elif event.membership == Membership.LEAVE:
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room_end_token = "s%d" % (event.stream_ordering,)
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deferred_room_state = self.store.get_state_for_events(
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[event.event_id], None
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)
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deferred_room_state.addCallback(
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lambda states: states[event.event_id]
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)
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(messages, token), current_state = yield defer.gatherResults(
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[
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self.store.get_recent_events_for_room(
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event.room_id,
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limit=limit,
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end_token=room_end_token,
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),
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deferred_room_state,
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]
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).addErrback(unwrapFirstError)
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messages = yield self.filter_events_for_client(
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user_id, messages
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)
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start_token = now_token.copy_and_replace("room_key", token[0])
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end_token = now_token.copy_and_replace("room_key", token[1])
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time_now = self.clock.time_msec()
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d["messages"] = {
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"chunk": [
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serialize_event(m, time_now, as_client_event)
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for m in messages
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],
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"start": start_token.to_string(),
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"end": end_token.to_string(),
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}
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d["state"] = [
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serialize_event(c, time_now, as_client_event)
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for c in current_state.values()
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]
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account_data_events = []
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tags = tags_by_room.get(event.room_id)
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if tags:
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account_data_events.append({
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"type": "m.tag",
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"content": {"tags": tags},
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})
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account_data = account_data_by_room.get(event.room_id, {})
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for account_data_type, content in account_data.items():
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account_data_events.append({
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"type": account_data_type,
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"content": content,
|
|
})
|
|
|
|
d["account_data"] = account_data_events
|
|
except:
|
|
logger.exception("Failed to get snapshot")
|
|
|
|
yield concurrently_execute(handle_room, room_list, 10)
|
|
|
|
account_data_events = []
|
|
for account_data_type, content in account_data.items():
|
|
account_data_events.append({
|
|
"type": account_data_type,
|
|
"content": content,
|
|
})
|
|
|
|
ret = {
|
|
"rooms": rooms_ret,
|
|
"presence": presence,
|
|
"account_data": account_data_events,
|
|
"receipts": receipt,
|
|
"end": now_token.to_string(),
|
|
}
|
|
|
|
defer.returnValue(ret)
|
|
|
|
@defer.inlineCallbacks
|
|
def room_initial_sync(self, requester, room_id, pagin_config=None):
|
|
"""Capture the a snapshot of a room. If user is currently a member of
|
|
the room this will be what is currently in the room. If the user left
|
|
the room this will be what was in the room when they left.
|
|
|
|
Args:
|
|
requester(Requester): The user to get a snapshot for.
|
|
room_id(str): The room to get a snapshot of.
|
|
pagin_config(synapse.streams.config.PaginationConfig):
|
|
The pagination config used to determine how many messages to
|
|
return.
|
|
Raises:
|
|
AuthError if the user wasn't in the room.
|
|
Returns:
|
|
A JSON serialisable dict with the snapshot of the room.
|
|
"""
|
|
|
|
user_id = requester.user.to_string()
|
|
|
|
membership, member_event_id = yield self._check_in_room_or_world_readable(
|
|
room_id, user_id,
|
|
)
|
|
is_peeking = member_event_id is None
|
|
|
|
if membership == Membership.JOIN:
|
|
result = yield self._room_initial_sync_joined(
|
|
user_id, room_id, pagin_config, membership, is_peeking
|
|
)
|
|
elif membership == Membership.LEAVE:
|
|
result = yield self._room_initial_sync_parted(
|
|
user_id, room_id, pagin_config, membership, member_event_id, is_peeking
|
|
)
|
|
|
|
account_data_events = []
|
|
tags = yield self.store.get_tags_for_room(user_id, room_id)
|
|
if tags:
|
|
account_data_events.append({
|
|
"type": "m.tag",
|
|
"content": {"tags": tags},
|
|
})
|
|
|
|
account_data = yield self.store.get_account_data_for_room(user_id, room_id)
|
|
for account_data_type, content in account_data.items():
|
|
account_data_events.append({
|
|
"type": account_data_type,
|
|
"content": content,
|
|
})
|
|
|
|
result["account_data"] = account_data_events
|
|
|
|
defer.returnValue(result)
|
|
|
|
@defer.inlineCallbacks
|
|
def _room_initial_sync_parted(self, user_id, room_id, pagin_config,
|
|
membership, member_event_id, is_peeking):
|
|
room_state = yield self.store.get_state_for_events(
|
|
[member_event_id], None
|
|
)
|
|
|
|
room_state = room_state[member_event_id]
|
|
|
|
limit = pagin_config.limit if pagin_config else None
|
|
if limit is None:
|
|
limit = 10
|
|
|
|
stream_token = yield self.store.get_stream_token_for_event(
|
|
member_event_id
|
|
)
|
|
|
|
messages, token = yield self.store.get_recent_events_for_room(
|
|
room_id,
|
|
limit=limit,
|
|
end_token=stream_token
|
|
)
|
|
|
|
messages = yield self.filter_events_for_client(
|
|
user_id, messages, is_peeking=is_peeking
|
|
)
|
|
|
|
start_token = StreamToken.START.copy_and_replace("room_key", token[0])
|
|
end_token = StreamToken.START.copy_and_replace("room_key", token[1])
|
|
|
|
time_now = self.clock.time_msec()
|
|
|
|
defer.returnValue({
|
|
"membership": membership,
|
|
"room_id": room_id,
|
|
"messages": {
|
|
"chunk": [serialize_event(m, time_now) for m in messages],
|
|
"start": start_token.to_string(),
|
|
"end": end_token.to_string(),
|
|
},
|
|
"state": [serialize_event(s, time_now) for s in room_state.values()],
|
|
"presence": [],
|
|
"receipts": [],
|
|
})
|
|
|
|
@defer.inlineCallbacks
|
|
def _room_initial_sync_joined(self, user_id, room_id, pagin_config,
|
|
membership, is_peeking):
|
|
current_state = yield self.state.get_current_state(
|
|
room_id=room_id,
|
|
)
|
|
|
|
# TODO: These concurrently
|
|
time_now = self.clock.time_msec()
|
|
state = [
|
|
serialize_event(x, time_now)
|
|
for x in current_state.values()
|
|
]
|
|
|
|
now_token = yield self.hs.get_event_sources().get_current_token()
|
|
|
|
limit = pagin_config.limit if pagin_config else None
|
|
if limit is None:
|
|
limit = 10
|
|
|
|
room_members = [
|
|
m for m in current_state.values()
|
|
if m.type == EventTypes.Member
|
|
and m.content["membership"] == Membership.JOIN
|
|
]
|
|
|
|
presence_handler = self.hs.get_handlers().presence_handler
|
|
|
|
@defer.inlineCallbacks
|
|
def get_presence():
|
|
states = yield presence_handler.get_states(
|
|
[m.user_id for m in room_members],
|
|
as_event=True,
|
|
)
|
|
|
|
defer.returnValue(states)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_receipts():
|
|
receipts_handler = self.hs.get_handlers().receipts_handler
|
|
receipts = yield receipts_handler.get_receipts_for_room(
|
|
room_id,
|
|
now_token.receipt_key
|
|
)
|
|
defer.returnValue(receipts)
|
|
|
|
presence, receipts, (messages, token) = yield defer.gatherResults(
|
|
[
|
|
get_presence(),
|
|
get_receipts(),
|
|
self.store.get_recent_events_for_room(
|
|
room_id,
|
|
limit=limit,
|
|
end_token=now_token.room_key,
|
|
)
|
|
],
|
|
consumeErrors=True,
|
|
).addErrback(unwrapFirstError)
|
|
|
|
messages = yield self.filter_events_for_client(
|
|
user_id, messages, is_peeking=is_peeking,
|
|
)
|
|
|
|
start_token = now_token.copy_and_replace("room_key", token[0])
|
|
end_token = now_token.copy_and_replace("room_key", token[1])
|
|
|
|
time_now = self.clock.time_msec()
|
|
|
|
ret = {
|
|
"room_id": room_id,
|
|
"messages": {
|
|
"chunk": [serialize_event(m, time_now) for m in messages],
|
|
"start": start_token.to_string(),
|
|
"end": end_token.to_string(),
|
|
},
|
|
"state": state,
|
|
"presence": presence,
|
|
"receipts": receipts,
|
|
}
|
|
if not is_peeking:
|
|
ret["membership"] = membership
|
|
|
|
defer.returnValue(ret)
|