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- # -*- coding: utf-8 -*-
- # Copyright 2014-2016 OpenMarket Ltd
- # Copyright 2018 New Vector Ltd
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- from twisted.internet import defer
- from collections import namedtuple
- from synapse.storage.events import EventsWorkerStore
- from synapse.util.async import Linearizer
- from synapse.util.caches import intern_string
- from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
- from synapse.util.stringutils import to_ascii
- from synapse.api.constants import Membership, EventTypes
- from synapse.types import get_domain_from_id
- import logging
- import simplejson as json
- logger = logging.getLogger(__name__)
- RoomsForUser = namedtuple(
- "RoomsForUser",
- ("room_id", "sender", "membership", "event_id", "stream_ordering")
- )
- GetRoomsForUserWithStreamOrdering = namedtuple(
- "_GetRoomsForUserWithStreamOrdering",
- ("room_id", "stream_ordering",)
- )
- # We store this using a namedtuple so that we save about 3x space over using a
- # dict.
- ProfileInfo = namedtuple(
- "ProfileInfo", ("avatar_url", "display_name")
- )
- _MEMBERSHIP_PROFILE_UPDATE_NAME = "room_membership_profile_update"
- class RoomMemberWorkerStore(EventsWorkerStore):
- @cachedInlineCallbacks(max_entries=100000, iterable=True, cache_context=True)
- def get_hosts_in_room(self, room_id, cache_context):
- """Returns the set of all hosts currently in the room
- """
- user_ids = yield self.get_users_in_room(
- room_id, on_invalidate=cache_context.invalidate,
- )
- hosts = frozenset(get_domain_from_id(user_id) for user_id in user_ids)
- defer.returnValue(hosts)
- @cached(max_entries=100000, iterable=True)
- def get_users_in_room(self, room_id):
- def f(txn):
- sql = (
- "SELECT m.user_id FROM room_memberships as m"
- " INNER JOIN current_state_events as c"
- " ON m.event_id = c.event_id "
- " AND m.room_id = c.room_id "
- " AND m.user_id = c.state_key"
- " WHERE c.type = 'm.room.member' AND c.room_id = ? AND m.membership = ?"
- )
- txn.execute(sql, (room_id, Membership.JOIN,))
- return [to_ascii(r[0]) for r in txn]
- return self.runInteraction("get_users_in_room", f)
- @cached()
- def get_invited_rooms_for_user(self, user_id):
- """ Get all the rooms the user is invited to
- Args:
- user_id (str): The user ID.
- Returns:
- A deferred list of RoomsForUser.
- """
- return self.get_rooms_for_user_where_membership_is(
- user_id, [Membership.INVITE]
- )
- @defer.inlineCallbacks
- def get_invite_for_user_in_room(self, user_id, room_id):
- """Gets the invite for the given user and room
- Args:
- user_id (str)
- room_id (str)
- Returns:
- Deferred: Resolves to either a RoomsForUser or None if no invite was
- found.
- """
- invites = yield self.get_invited_rooms_for_user(user_id)
- for invite in invites:
- if invite.room_id == room_id:
- defer.returnValue(invite)
- defer.returnValue(None)
- def get_rooms_for_user_where_membership_is(self, user_id, membership_list):
- """ Get all the rooms for this user where the membership for this user
- matches one in the membership list.
- Args:
- user_id (str): The user ID.
- membership_list (list): A list of synapse.api.constants.Membership
- values which the user must be in.
- Returns:
- A list of dictionary objects, with room_id, membership and sender
- defined.
- """
- if not membership_list:
- return defer.succeed(None)
- return self.runInteraction(
- "get_rooms_for_user_where_membership_is",
- self._get_rooms_for_user_where_membership_is_txn,
- user_id, membership_list
- )
- def _get_rooms_for_user_where_membership_is_txn(self, txn, user_id,
- membership_list):
- do_invite = Membership.INVITE in membership_list
- membership_list = [m for m in membership_list if m != Membership.INVITE]
- results = []
- if membership_list:
- where_clause = "user_id = ? AND (%s) AND forgotten = 0" % (
- " OR ".join(["membership = ?" for _ in membership_list]),
- )
- args = [user_id]
- args.extend(membership_list)
- sql = (
- "SELECT m.room_id, m.sender, m.membership, m.event_id, e.stream_ordering"
- " FROM current_state_events as c"
- " INNER JOIN room_memberships as m"
- " ON m.event_id = c.event_id"
- " INNER JOIN events as e"
- " ON e.event_id = c.event_id"
- " AND m.room_id = c.room_id"
- " AND m.user_id = c.state_key"
- " WHERE c.type = 'm.room.member' AND %s"
- ) % (where_clause,)
- txn.execute(sql, args)
- results = [
- RoomsForUser(**r) for r in self.cursor_to_dict(txn)
- ]
- if do_invite:
- sql = (
- "SELECT i.room_id, inviter, i.event_id, e.stream_ordering"
- " FROM local_invites as i"
- " INNER JOIN events as e USING (event_id)"
- " WHERE invitee = ? AND locally_rejected is NULL"
- " AND replaced_by is NULL"
- )
- txn.execute(sql, (user_id,))
- results.extend(RoomsForUser(
- room_id=r["room_id"],
- sender=r["inviter"],
- event_id=r["event_id"],
- stream_ordering=r["stream_ordering"],
- membership=Membership.INVITE,
- ) for r in self.cursor_to_dict(txn))
- return results
- @cachedInlineCallbacks(max_entries=500000, iterable=True)
- def get_rooms_for_user_with_stream_ordering(self, user_id):
- """Returns a set of room_ids the user is currently joined to
- Args:
- user_id (str)
- Returns:
- Deferred[frozenset[GetRoomsForUserWithStreamOrdering]]: Returns
- the rooms the user is in currently, along with the stream ordering
- of the most recent join for that user and room.
- """
- rooms = yield self.get_rooms_for_user_where_membership_is(
- user_id, membership_list=[Membership.JOIN],
- )
- defer.returnValue(frozenset(
- GetRoomsForUserWithStreamOrdering(r.room_id, r.stream_ordering)
- for r in rooms
- ))
- @defer.inlineCallbacks
- def get_rooms_for_user(self, user_id, on_invalidate=None):
- """Returns a set of room_ids the user is currently joined to
- """
- rooms = yield self.get_rooms_for_user_with_stream_ordering(
- user_id, on_invalidate=on_invalidate,
- )
- defer.returnValue(frozenset(r.room_id for r in rooms))
- @cachedInlineCallbacks(max_entries=500000, cache_context=True, iterable=True)
- def get_users_who_share_room_with_user(self, user_id, cache_context):
- """Returns the set of users who share a room with `user_id`
- """
- room_ids = yield self.get_rooms_for_user(
- user_id, on_invalidate=cache_context.invalidate,
- )
- user_who_share_room = set()
- for room_id in room_ids:
- user_ids = yield self.get_users_in_room(
- room_id, on_invalidate=cache_context.invalidate,
- )
- user_who_share_room.update(user_ids)
- defer.returnValue(user_who_share_room)
- def get_joined_users_from_context(self, event, context):
- state_group = context.state_group
- if not state_group:
- # If state_group is None it means it has yet to be assigned a
- # state group, i.e. we need to make sure that calls with a state_group
- # of None don't hit previous cached calls with a None state_group.
- # To do this we set the state_group to a new object as object() != object()
- state_group = object()
- return self._get_joined_users_from_context(
- event.room_id, state_group, context.current_state_ids,
- event=event,
- context=context,
- )
- def get_joined_users_from_state(self, room_id, state_entry):
- state_group = state_entry.state_group
- if not state_group:
- # If state_group is None it means it has yet to be assigned a
- # state group, i.e. we need to make sure that calls with a state_group
- # of None don't hit previous cached calls with a None state_group.
- # To do this we set the state_group to a new object as object() != object()
- state_group = object()
- return self._get_joined_users_from_context(
- room_id, state_group, state_entry.state, context=state_entry,
- )
- @cachedInlineCallbacks(num_args=2, cache_context=True, iterable=True,
- max_entries=100000)
- def _get_joined_users_from_context(self, room_id, state_group, current_state_ids,
- cache_context, event=None, context=None):
- # We don't use `state_group`, it's there so that we can cache based
- # on it. However, it's important that it's never None, since two current_states
- # with a state_group of None are likely to be different.
- # See bulk_get_push_rules_for_room for how we work around this.
- assert state_group is not None
- users_in_room = {}
- member_event_ids = [
- e_id
- for key, e_id in current_state_ids.iteritems()
- if key[0] == EventTypes.Member
- ]
- if context is not None:
- # If we have a context with a delta from a previous state group,
- # check if we also have the result from the previous group in cache.
- # If we do then we can reuse that result and simply update it with
- # any membership changes in `delta_ids`
- if context.prev_group and context.delta_ids:
- prev_res = self._get_joined_users_from_context.cache.get(
- (room_id, context.prev_group), None
- )
- if prev_res and isinstance(prev_res, dict):
- users_in_room = dict(prev_res)
- member_event_ids = [
- e_id
- for key, e_id in context.delta_ids.iteritems()
- if key[0] == EventTypes.Member
- ]
- for etype, state_key in context.delta_ids:
- users_in_room.pop(state_key, None)
- # We check if we have any of the member event ids in the event cache
- # before we ask the DB
- # We don't update the event cache hit ratio as it completely throws off
- # the hit ratio counts. After all, we don't populate the cache if we
- # miss it here
- event_map = self._get_events_from_cache(
- member_event_ids,
- allow_rejected=False,
- update_metrics=False,
- )
- missing_member_event_ids = []
- for event_id in member_event_ids:
- ev_entry = event_map.get(event_id)
- if ev_entry:
- if ev_entry.event.membership == Membership.JOIN:
- users_in_room[to_ascii(ev_entry.event.state_key)] = ProfileInfo(
- display_name=to_ascii(
- ev_entry.event.content.get("displayname", None)
- ),
- avatar_url=to_ascii(
- ev_entry.event.content.get("avatar_url", None)
- ),
- )
- else:
- missing_member_event_ids.append(event_id)
- if missing_member_event_ids:
- rows = yield self._simple_select_many_batch(
- table="room_memberships",
- column="event_id",
- iterable=missing_member_event_ids,
- retcols=('user_id', 'display_name', 'avatar_url',),
- keyvalues={
- "membership": Membership.JOIN,
- },
- batch_size=500,
- desc="_get_joined_users_from_context",
- )
- users_in_room.update({
- to_ascii(row["user_id"]): ProfileInfo(
- avatar_url=to_ascii(row["avatar_url"]),
- display_name=to_ascii(row["display_name"]),
- )
- for row in rows
- })
- if event is not None and event.type == EventTypes.Member:
- if event.membership == Membership.JOIN:
- if event.event_id in member_event_ids:
- users_in_room[to_ascii(event.state_key)] = ProfileInfo(
- display_name=to_ascii(event.content.get("displayname", None)),
- avatar_url=to_ascii(event.content.get("avatar_url", None)),
- )
- defer.returnValue(users_in_room)
- @cachedInlineCallbacks(max_entries=10000)
- def is_host_joined(self, room_id, host):
- if '%' in host or '_' in host:
- raise Exception("Invalid host name")
- sql = """
- SELECT state_key FROM current_state_events AS c
- INNER JOIN room_memberships USING (event_id)
- WHERE membership = 'join'
- AND type = 'm.room.member'
- AND c.room_id = ?
- AND state_key LIKE ?
- LIMIT 1
- """
- # We do need to be careful to ensure that host doesn't have any wild cards
- # in it, but we checked above for known ones and we'll check below that
- # the returned user actually has the correct domain.
- like_clause = "%:" + host
- rows = yield self._execute("is_host_joined", None, sql, room_id, like_clause)
- if not rows:
- defer.returnValue(False)
- user_id = rows[0][0]
- if get_domain_from_id(user_id) != host:
- # This can only happen if the host name has something funky in it
- raise Exception("Invalid host name")
- defer.returnValue(True)
- @cachedInlineCallbacks()
- def was_host_joined(self, room_id, host):
- """Check whether the server is or ever was in the room.
- Args:
- room_id (str)
- host (str)
- Returns:
- Deferred: Resolves to True if the host is/was in the room, otherwise
- False.
- """
- if '%' in host or '_' in host:
- raise Exception("Invalid host name")
- sql = """
- SELECT user_id FROM room_memberships
- WHERE room_id = ?
- AND user_id LIKE ?
- AND membership = 'join'
- LIMIT 1
- """
- # We do need to be careful to ensure that host doesn't have any wild cards
- # in it, but we checked above for known ones and we'll check below that
- # the returned user actually has the correct domain.
- like_clause = "%:" + host
- rows = yield self._execute("was_host_joined", None, sql, room_id, like_clause)
- if not rows:
- defer.returnValue(False)
- user_id = rows[0][0]
- if get_domain_from_id(user_id) != host:
- # This can only happen if the host name has something funky in it
- raise Exception("Invalid host name")
- defer.returnValue(True)
- def get_joined_hosts(self, room_id, state_entry):
- state_group = state_entry.state_group
- if not state_group:
- # If state_group is None it means it has yet to be assigned a
- # state group, i.e. we need to make sure that calls with a state_group
- # of None don't hit previous cached calls with a None state_group.
- # To do this we set the state_group to a new object as object() != object()
- state_group = object()
- return self._get_joined_hosts(
- room_id, state_group, state_entry.state, state_entry=state_entry,
- )
- @cachedInlineCallbacks(num_args=2, max_entries=10000, iterable=True)
- # @defer.inlineCallbacks
- def _get_joined_hosts(self, room_id, state_group, current_state_ids, state_entry):
- # We don't use `state_group`, its there so that we can cache based
- # on it. However, its important that its never None, since two current_state's
- # with a state_group of None are likely to be different.
- # See bulk_get_push_rules_for_room for how we work around this.
- assert state_group is not None
- cache = self._get_joined_hosts_cache(room_id)
- joined_hosts = yield cache.get_destinations(state_entry)
- defer.returnValue(joined_hosts)
- @cached(max_entries=10000, iterable=True)
- def _get_joined_hosts_cache(self, room_id):
- return _JoinedHostsCache(self, room_id)
- @cached()
- def who_forgot_in_room(self, room_id):
- return self._simple_select_list(
- table="room_memberships",
- retcols=("user_id", "event_id"),
- keyvalues={
- "room_id": room_id,
- "forgotten": 1,
- },
- desc="who_forgot"
- )
- class RoomMemberStore(RoomMemberWorkerStore):
- def __init__(self, db_conn, hs):
- super(RoomMemberStore, self).__init__(db_conn, hs)
- self.register_background_update_handler(
- _MEMBERSHIP_PROFILE_UPDATE_NAME, self._background_add_membership_profile
- )
- def _store_room_members_txn(self, txn, events, backfilled):
- """Store a room member in the database.
- """
- self._simple_insert_many_txn(
- txn,
- table="room_memberships",
- values=[
- {
- "event_id": event.event_id,
- "user_id": event.state_key,
- "sender": event.user_id,
- "room_id": event.room_id,
- "membership": event.membership,
- "display_name": event.content.get("displayname", None),
- "avatar_url": event.content.get("avatar_url", None),
- }
- for event in events
- ]
- )
- for event in events:
- txn.call_after(
- self._membership_stream_cache.entity_has_changed,
- event.state_key, event.internal_metadata.stream_ordering
- )
- txn.call_after(
- self.get_invited_rooms_for_user.invalidate, (event.state_key,)
- )
- # We update the local_invites table only if the event is "current",
- # i.e., its something that has just happened.
- # The only current event that can also be an outlier is if its an
- # invite that has come in across federation.
- is_new_state = not backfilled and (
- not event.internal_metadata.is_outlier()
- or event.internal_metadata.is_invite_from_remote()
- )
- is_mine = self.hs.is_mine_id(event.state_key)
- if is_new_state and is_mine:
- if event.membership == Membership.INVITE:
- self._simple_insert_txn(
- txn,
- table="local_invites",
- values={
- "event_id": event.event_id,
- "invitee": event.state_key,
- "inviter": event.sender,
- "room_id": event.room_id,
- "stream_id": event.internal_metadata.stream_ordering,
- }
- )
- else:
- sql = (
- "UPDATE local_invites SET stream_id = ?, replaced_by = ? WHERE"
- " room_id = ? AND invitee = ? AND locally_rejected is NULL"
- " AND replaced_by is NULL"
- )
- txn.execute(sql, (
- event.internal_metadata.stream_ordering,
- event.event_id,
- event.room_id,
- event.state_key,
- ))
- @defer.inlineCallbacks
- def locally_reject_invite(self, user_id, room_id):
- sql = (
- "UPDATE local_invites SET stream_id = ?, locally_rejected = ? WHERE"
- " room_id = ? AND invitee = ? AND locally_rejected is NULL"
- " AND replaced_by is NULL"
- )
- def f(txn, stream_ordering):
- txn.execute(sql, (
- stream_ordering,
- True,
- room_id,
- user_id,
- ))
- with self._stream_id_gen.get_next() as stream_ordering:
- yield self.runInteraction("locally_reject_invite", f, stream_ordering)
- def forget(self, user_id, room_id):
- """Indicate that user_id wishes to discard history for room_id."""
- def f(txn):
- sql = (
- "UPDATE"
- " room_memberships"
- " SET"
- " forgotten = 1"
- " WHERE"
- " user_id = ?"
- " AND"
- " room_id = ?"
- )
- txn.execute(sql, (user_id, room_id))
- txn.call_after(self.was_forgotten_at.invalidate_all)
- txn.call_after(self.did_forget.invalidate, (user_id, room_id))
- self._invalidate_cache_and_stream(
- txn, self.who_forgot_in_room, (room_id,)
- )
- return self.runInteraction("forget_membership", f)
- @cachedInlineCallbacks(num_args=2)
- def did_forget(self, user_id, room_id):
- """Returns whether user_id has elected to discard history for room_id.
- Returns False if they have since re-joined."""
- def f(txn):
- sql = (
- "SELECT"
- " COUNT(*)"
- " FROM"
- " room_memberships"
- " WHERE"
- " user_id = ?"
- " AND"
- " room_id = ?"
- " AND"
- " forgotten = 0"
- )
- txn.execute(sql, (user_id, room_id))
- rows = txn.fetchall()
- return rows[0][0]
- count = yield self.runInteraction("did_forget_membership", f)
- defer.returnValue(count == 0)
- @cachedInlineCallbacks(num_args=3)
- def was_forgotten_at(self, user_id, room_id, event_id):
- """Returns whether user_id has elected to discard history for room_id at
- event_id.
- event_id must be a membership event."""
- def f(txn):
- sql = (
- "SELECT"
- " forgotten"
- " FROM"
- " room_memberships"
- " WHERE"
- " user_id = ?"
- " AND"
- " room_id = ?"
- " AND"
- " event_id = ?"
- )
- txn.execute(sql, (user_id, room_id, event_id))
- rows = txn.fetchall()
- return rows[0][0]
- forgot = yield self.runInteraction("did_forget_membership_at", f)
- defer.returnValue(forgot == 1)
- @defer.inlineCallbacks
- def _background_add_membership_profile(self, progress, batch_size):
- target_min_stream_id = progress.get(
- "target_min_stream_id_inclusive", self._min_stream_order_on_start
- )
- max_stream_id = progress.get(
- "max_stream_id_exclusive", self._stream_order_on_start + 1
- )
- INSERT_CLUMP_SIZE = 1000
- def add_membership_profile_txn(txn):
- sql = ("""
- SELECT stream_ordering, event_id, events.room_id, content
- FROM events
- INNER JOIN room_memberships USING (event_id)
- WHERE ? <= stream_ordering AND stream_ordering < ?
- AND type = 'm.room.member'
- ORDER BY stream_ordering DESC
- LIMIT ?
- """)
- txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
- rows = self.cursor_to_dict(txn)
- if not rows:
- return 0
- min_stream_id = rows[-1]["stream_ordering"]
- to_update = []
- for row in rows:
- event_id = row["event_id"]
- room_id = row["room_id"]
- try:
- content = json.loads(row["content"])
- except Exception:
- continue
- display_name = content.get("displayname", None)
- avatar_url = content.get("avatar_url", None)
- if display_name or avatar_url:
- to_update.append((
- display_name, avatar_url, event_id, room_id
- ))
- to_update_sql = ("""
- UPDATE room_memberships SET display_name = ?, avatar_url = ?
- WHERE event_id = ? AND room_id = ?
- """)
- for index in range(0, len(to_update), INSERT_CLUMP_SIZE):
- clump = to_update[index:index + INSERT_CLUMP_SIZE]
- txn.executemany(to_update_sql, clump)
- progress = {
- "target_min_stream_id_inclusive": target_min_stream_id,
- "max_stream_id_exclusive": min_stream_id,
- }
- self._background_update_progress_txn(
- txn, _MEMBERSHIP_PROFILE_UPDATE_NAME, progress
- )
- return len(rows)
- result = yield self.runInteraction(
- _MEMBERSHIP_PROFILE_UPDATE_NAME, add_membership_profile_txn
- )
- if not result:
- yield self._end_background_update(_MEMBERSHIP_PROFILE_UPDATE_NAME)
- defer.returnValue(result)
- class _JoinedHostsCache(object):
- """Cache for joined hosts in a room that is optimised to handle updates
- via state deltas.
- """
- def __init__(self, store, room_id):
- self.store = store
- self.room_id = room_id
- self.hosts_to_joined_users = {}
- self.state_group = object()
- self.linearizer = Linearizer("_JoinedHostsCache")
- self._len = 0
- @defer.inlineCallbacks
- def get_destinations(self, state_entry):
- """Get set of destinations for a state entry
- Args:
- state_entry(synapse.state._StateCacheEntry)
- """
- if state_entry.state_group == self.state_group:
- defer.returnValue(frozenset(self.hosts_to_joined_users))
- with (yield self.linearizer.queue(())):
- if state_entry.state_group == self.state_group:
- pass
- elif state_entry.prev_group == self.state_group:
- for (typ, state_key), event_id in state_entry.delta_ids.iteritems():
- if typ != EventTypes.Member:
- continue
- host = intern_string(get_domain_from_id(state_key))
- user_id = state_key
- known_joins = self.hosts_to_joined_users.setdefault(host, set())
- event = yield self.store.get_event(event_id)
- if event.membership == Membership.JOIN:
- known_joins.add(user_id)
- else:
- known_joins.discard(user_id)
- if not known_joins:
- self.hosts_to_joined_users.pop(host, None)
- else:
- joined_users = yield self.store.get_joined_users_from_state(
- self.room_id, state_entry,
- )
- self.hosts_to_joined_users = {}
- for user_id in joined_users:
- host = intern_string(get_domain_from_id(user_id))
- self.hosts_to_joined_users.setdefault(host, set()).add(user_id)
- if state_entry.state_group:
- self.state_group = state_entry.state_group
- else:
- self.state_group = object()
- self._len = sum(len(v) for v in self.hosts_to_joined_users.itervalues())
- defer.returnValue(frozenset(self.hosts_to_joined_users))
- def __len__(self):
- return self._len
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