# -*- 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 domain = UserID.from_string(target_user_id).domain 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, } ) # Update room hosts table if event.membership == Membership.JOIN: sql = ( "INSERT OR IGNORE INTO room_hosts (room_id, host) " "VALUES (?, ?)" ) txn.execute(sql, (event.room_id, domain)) elif event.membership != Membership.INVITE: # Check if this was the last person to have left. member_events = self._get_members_query_txn( txn, where_clause=("c.room_id = ? AND m.membership = ?" " AND m.user_id != ?"), where_values=(event.room_id, Membership.JOIN, target_user_id,) ) joined_domains = set() for e in member_events: try: joined_domains.add( UserID.from_string(e.state_key).domain ) except: # FIXME: How do we deal with invalid user ids in the db? logger.exception("Invalid user_id: %s", event.state_key) if domain not in joined_domains: sql = ( "DELETE FROM room_hosts WHERE room_id = ? AND host = ?" ) txn.execute(sql, (event.room_id, domain)) self.get_rooms_for_user.invalidate(target_user_id) @defer.inlineCallbacks 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. """ rows = yield self._get_members_by_dict({ "e.room_id": room_id, "m.user_id": user_id, }) defer.returnValue(rows[0] if rows else None) def _get_room_member(self, txn, user_id, room_id): sql = ( "SELECT e.* FROM events as e" " INNER JOIN room_memberships as m" " ON e.event_id = m.event_id" " INNER JOIN current_state_events as c" " ON m.event_id = c.event_id" " WHERE m.user_id = ? and e.room_id = ?" " LIMIT 1" ) txn.execute(sql, (user_id, room_id)) rows = self.cursor_to_dict(txn) if rows: return self._parse_events_txn(txn, rows)[0] else: return None 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" " WHERE m.membership = ? AND m.room_id = ?" ) txn.execute(sql, (Membership.JOIN, room_id)) return [r[0] for r in txn.fetchall()] return self.runInteraction("get_users_in_room", f) 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. """ where = {"m.room_id": room_id} if membership: where["m.membership"] = membership return self._get_members_by_dict(where) 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) where_clause = "user_id = ? AND (%s)" % ( " OR ".join(["membership = ?" for _ in membership_list]), ) args = [user_id] args.extend(membership_list) def f(txn): 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" " WHERE %s" ) % (where_clause,) txn.execute(sql, args) return [ RoomsForUser(**r) for r in self.cursor_to_dict(txn) ] return self.runInteraction( "get_rooms_for_user_where_membership_is", f ) def get_joined_hosts_for_room(self, room_id): return self._simple_select_onecol( "room_hosts", {"room_id": room_id}, "host" ) def _get_members_by_dict(self, where_dict): clause = " AND ".join("%s = ?" % k for k in where_dict.keys()) vals = where_dict.values() return self._get_members_query(clause, vals) def _get_members_query(self, where_clause, where_values): return self.runInteraction( "get_members_query", self._get_members_query_txn, where_clause, where_values ) def _get_members_query_txn(self, txn, where_clause, where_values): sql = ( "SELECT e.* FROM events as e " "INNER JOIN room_memberships as m " "ON e.event_id = m.event_id " "INNER JOIN current_state_events as c " "ON m.event_id = c.event_id " "WHERE %(where)s " ) % { "where": where_clause, } txn.execute(sql, where_values) rows = self.cursor_to_dict(txn) results = self._parse_events_txn(txn, rows) return results @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)