# -*- coding: utf-8 -*- # Copyright 2014-2016 OpenMarket Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from twisted.internet import defer from collections import namedtuple from ._base import SQLBaseStore from synapse.util.caches.descriptors import cached, cachedInlineCallbacks from synapse.api.constants import Membership, EventTypes from synapse.types import get_domain_from_id import logging logger = logging.getLogger(__name__) RoomsForUser = namedtuple( "RoomsForUser", ("room_id", "sender", "membership", "event_id", "stream_ordering") ) class RoomMemberStore(SQLBaseStore): 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, } for event in events ] ) for event in events: txn.call_after(self.get_rooms_for_user.invalidate, (event.state_key,)) txn.call_after(self.get_joined_hosts_for_room.invalidate, (event.room_id,)) txn.call_after(self.get_users_in_room.invalidate, (event.room_id,)) 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) @cached(max_entries=5000) def get_users_in_room(self, room_id): def f(txn): rows = self._get_members_rows_txn( txn, room_id=room_id, membership=Membership.JOIN, ) return [r["user_id"] for r in rows] 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 %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=5000) def get_joined_hosts_for_room(self, room_id): user_ids = yield self.get_users_in_room(room_id) defer.returnValue(set(get_domain_from_id(uid) for uid in user_ids)) def _get_members_rows_txn(self, txn, room_id, membership=None, user_id=None): where_clause = "c.room_id = ?" where_values = [room_id] if membership: where_clause += " AND m.membership = ?" where_values.append(membership) if user_id: where_clause += " AND m.user_id = ?" where_values.append(user_id) sql = ( "SELECT m.* 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 %(where)s" ) % { "where": where_clause, } txn.execute(sql, where_values) rows = self.cursor_to_dict(txn) return rows @cached(max_entries=5000) def get_rooms_for_user(self, user_id): return self.get_rooms_for_user_where_membership_is( user_id, membership_list=[Membership.JOIN], ) 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) @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" ) def get_joined_users_from_context(self, room_id, 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( room_id, state_group, context.current_state_ids ) @cachedInlineCallbacks(num_args=2, cache_context=True) def _get_joined_users_from_context(self, room_id, state_group, current_state_ids, cache_context): # 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 member_event_ids = [ e_id for key, e_id in current_state_ids.iteritems() if key[0] == EventTypes.Member ] rows = yield self._simple_select_many_batch( table="room_memberships", column="event_id", iterable=member_event_ids, retcols=['user_id'], keyvalues={ "membership": Membership.JOIN, }, desc="_get_joined_users_from_context", ) defer.returnValue(set(row["user_id"] for row in rows)) def is_host_joined(self, room_id, host, state_group, state_ids): 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_ids ) @cachedInlineCallbacks(num_args=3) def _is_host_joined(self, room_id, host, state_group, current_state_ids): # 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 for (etype, state_key), event_id in current_state_ids.items(): if etype == EventTypes.Member: try: if get_domain_from_id(state_key) != host: continue except: logger.warn("state_key not user_id: %s", state_key) continue event = yield self.store.get_event(event_id, allow_none=True) if event and event.content["membership"] == Membership.JOIN: defer.returnValue(True) defer.returnValue(False)