# -*- coding: utf-8 -*- # Copyright 2014, 2015 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, cached from synapse.api.constants import Membership from synapse.types import UserID import logging logger = logging.getLogger(__name__) RoomsForUser = namedtuple( "RoomsForUser", ("room_id", "sender", "membership") ) class RoomMemberStore(SQLBaseStore): def _store_room_member_txn(self, txn, event): """Store a room member in the database. """ try: target_user_id = event.state_key except: logger.exception( "Failed to parse target_user_id=%s", target_user_id ) raise logger.debug( "_store_room_member_txn: target_user_id=%s, membership=%s", target_user_id, event.membership, ) self._simple_insert_txn( txn, "room_memberships", { "event_id": event.event_id, "user_id": target_user_id, "sender": event.user_id, "room_id": event.room_id, "membership": event.membership, } ) txn.call_after(self.get_rooms_for_user.invalidate, target_user_id) 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.get_user_objs_in_room.invalidate, event.room_id) def get_room_member(self, user_id, room_id): """Retrieve the current state of a room member. Args: user_id (str): The member's user ID. room_id (str): The room the member is in. Returns: Deferred: Results in a MembershipEvent or None. """ return self.runInteraction( "get_room_member", self._get_members_events_txn, room_id, user_id=user_id, ).addCallback( self._get_events ).addCallback( lambda events: events[0] if events else None ) @cached() 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_user_objs_in_room(self, room_id): return self.get_users_in_room(room_id).addCallback( lambda users: [UserID.from_string(u) for u in users] ) def get_room_members(self, room_id, membership=None): """Retrieve the current room member list for a room. Args: room_id (str): The room to get the list of members. membership (synapse.api.constants.Membership): The filter to apply to this list, or None to return all members with some state associated with this room. Returns: list of namedtuples representing the members in this room. """ return self.runInteraction( "get_room_members", self._get_members_events_txn, room_id, membership=membership, ).addCallback(self._get_events) 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): where_clause = "user_id = ? AND (%s)" % ( " OR ".join(["membership = ?" for _ in membership_list]), ) args = [user_id] args.extend(membership_list) sql = ( "SELECT m.room_id, m.sender, m.membership" " 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 %s" ) % (where_clause,) txn.execute(sql, args) return [ RoomsForUser(**r) for r in self.cursor_to_dict(txn) ] @cached() def get_joined_hosts_for_room(self, room_id): return self.runInteraction( "get_joined_hosts_for_room", self._get_joined_hosts_for_room_txn, room_id, ) def _get_joined_hosts_for_room_txn(self, txn, room_id): rows = self._get_members_rows_txn( txn, room_id, membership=Membership.JOIN ) joined_domains = set( UserID.from_string(r["user_id"]).domain for r in rows ) return joined_domains def _get_members_query(self, where_clause, where_values): return self.runInteraction( "get_members_query", self._get_members_events_txn, where_clause, where_values ).addCallbacks(self._get_events) def _get_members_events_txn(self, txn, room_id, membership=None, user_id=None): rows = self._get_members_rows_txn( txn, room_id, membership, user_id, ) return [r["event_id"] for r in rows] 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() def get_rooms_for_user(self, user_id): return self.get_rooms_for_user_where_membership_is( user_id, membership_list=[Membership.JOIN], ) @defer.inlineCallbacks def user_rooms_intersect(self, user_id_list): """ Checks whether all the users whose IDs are given in a list share a room. This is a "hot path" function that's called a lot, e.g. by presence for generating the event stream. As such, it is implemented locally by wrapping logic around heavily-cached database queries. """ if len(user_id_list) < 2: defer.returnValue(True) deferreds = [self.get_rooms_for_user(u) for u in user_id_list] results = yield defer.DeferredList(deferreds, consumeErrors=True) # A list of sets of strings giving room IDs for each user room_id_lists = [set([r.room_id for r in result[1]]) for result in results] # There isn't a setintersection(*list_of_sets) ret = len(room_id_lists.pop(0).intersection(*room_id_lists)) > 0 defer.returnValue(ret)