357 lines
12 KiB
Python
357 lines
12 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 collections import namedtuple
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from ._base import SQLBaseStore
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from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
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from synapse.api.constants import Membership
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from synapse.types import UserID
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import logging
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logger = logging.getLogger(__name__)
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RoomsForUser = namedtuple(
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"RoomsForUser",
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("room_id", "sender", "membership", "event_id", "stream_ordering")
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)
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class RoomMemberStore(SQLBaseStore):
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def _store_room_members_txn(self, txn, events):
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"""Store a room member in the database.
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"""
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self._simple_insert_many_txn(
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txn,
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table="room_memberships",
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values=[
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{
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"event_id": event.event_id,
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"user_id": event.state_key,
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"sender": event.user_id,
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"room_id": event.room_id,
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"membership": event.membership,
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}
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for event in events
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]
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)
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for event in events:
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txn.call_after(self.get_rooms_for_user.invalidate, (event.state_key,))
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txn.call_after(self.get_joined_hosts_for_room.invalidate, (event.room_id,))
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txn.call_after(self.get_users_in_room.invalidate, (event.room_id,))
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txn.call_after(
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self._membership_stream_cache.entity_has_changed,
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event.state_key, event.internal_metadata.stream_ordering
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)
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def get_room_member(self, user_id, room_id):
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"""Retrieve the current state of a room member.
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Args:
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user_id (str): The member's user ID.
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room_id (str): The room the member is in.
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Returns:
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Deferred: Results in a MembershipEvent or None.
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"""
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return self.runInteraction(
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"get_room_member",
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self._get_members_events_txn,
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room_id,
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user_id=user_id,
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).addCallback(
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self._get_events
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).addCallback(
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lambda events: events[0] if events else None
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)
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@cached(max_entries=5000)
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def get_users_in_room(self, room_id):
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def f(txn):
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rows = self._get_members_rows_txn(
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txn,
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room_id=room_id,
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membership=Membership.JOIN,
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)
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return [r["user_id"] for r in rows]
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return self.runInteraction("get_users_in_room", f)
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def get_room_members(self, room_id, membership=None):
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"""Retrieve the current room member list for a room.
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Args:
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room_id (str): The room to get the list of members.
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membership (synapse.api.constants.Membership): The filter to apply
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to this list, or None to return all members with some state
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associated with this room.
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Returns:
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list of namedtuples representing the members in this room.
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"""
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return self.runInteraction(
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"get_room_members",
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self._get_members_events_txn,
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room_id,
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membership=membership,
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).addCallback(self._get_events)
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@cached()
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def get_invites_for_user(self, user_id):
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""" Get all the invite events for a user
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Args:
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user_id (str): The user ID.
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Returns:
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A deferred list of event objects.
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"""
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return self.get_rooms_for_user_where_membership_is(
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user_id, [Membership.INVITE]
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).addCallback(lambda invites: self._get_events([
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invite.event_id for invite in invites
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]))
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def get_leave_and_ban_events_for_user(self, user_id):
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""" Get all the leave events for a user
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Args:
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user_id (str): The user ID.
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Returns:
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A deferred list of event objects.
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"""
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return self.get_rooms_for_user_where_membership_is(
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user_id, (Membership.LEAVE, Membership.BAN)
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).addCallback(lambda leaves: self._get_events([
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leave.event_id for leave in leaves
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]))
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def get_rooms_for_user_where_membership_is(self, user_id, membership_list):
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""" Get all the rooms for this user where the membership for this user
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matches one in the membership list.
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Args:
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user_id (str): The user ID.
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membership_list (list): A list of synapse.api.constants.Membership
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values which the user must be in.
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Returns:
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A list of dictionary objects, with room_id, membership and sender
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defined.
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"""
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if not membership_list:
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return defer.succeed(None)
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return self.runInteraction(
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"get_rooms_for_user_where_membership_is",
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self._get_rooms_for_user_where_membership_is_txn,
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user_id, membership_list
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)
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def _get_rooms_for_user_where_membership_is_txn(self, txn, user_id,
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membership_list):
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where_clause = "user_id = ? AND (%s) AND forgotten = 0" % (
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" OR ".join(["membership = ?" for _ in membership_list]),
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)
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args = [user_id]
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args.extend(membership_list)
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sql = (
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"SELECT m.room_id, m.sender, m.membership, m.event_id, e.stream_ordering"
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" FROM current_state_events as c"
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" INNER JOIN room_memberships as m"
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" ON m.event_id = c.event_id"
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" INNER JOIN events as e"
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" ON e.event_id = c.event_id"
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" AND m.room_id = c.room_id"
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" AND m.user_id = c.state_key"
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" WHERE %s"
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) % (where_clause,)
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txn.execute(sql, args)
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return [
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RoomsForUser(**r) for r in self.cursor_to_dict(txn)
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]
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@cached(max_entries=5000)
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def get_joined_hosts_for_room(self, room_id):
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return self.runInteraction(
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"get_joined_hosts_for_room",
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self._get_joined_hosts_for_room_txn,
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room_id,
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)
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def _get_joined_hosts_for_room_txn(self, txn, room_id):
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rows = self._get_members_rows_txn(
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txn,
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room_id, membership=Membership.JOIN
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)
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joined_domains = set(
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UserID.from_string(r["user_id"]).domain
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for r in rows
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)
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return joined_domains
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def _get_members_events_txn(self, txn, room_id, membership=None, user_id=None):
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rows = self._get_members_rows_txn(
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txn,
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room_id, membership, user_id,
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)
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return [r["event_id"] for r in rows]
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def _get_members_rows_txn(self, txn, room_id, membership=None, user_id=None):
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where_clause = "c.room_id = ?"
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where_values = [room_id]
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if membership:
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where_clause += " AND m.membership = ?"
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where_values.append(membership)
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if user_id:
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where_clause += " AND m.user_id = ?"
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where_values.append(user_id)
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sql = (
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"SELECT m.* FROM room_memberships as m"
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" INNER JOIN current_state_events as c"
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" ON m.event_id = c.event_id "
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" AND m.room_id = c.room_id "
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" AND m.user_id = c.state_key"
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" WHERE %(where)s"
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) % {
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"where": where_clause,
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}
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txn.execute(sql, where_values)
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rows = self.cursor_to_dict(txn)
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return rows
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@cached(max_entries=5000)
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def get_rooms_for_user(self, user_id):
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return self.get_rooms_for_user_where_membership_is(
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user_id, membership_list=[Membership.JOIN],
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)
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@defer.inlineCallbacks
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def user_rooms_intersect(self, user_id_list):
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""" Checks whether all the users whose IDs are given in a list share a
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room.
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This is a "hot path" function that's called a lot, e.g. by presence for
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generating the event stream. As such, it is implemented locally by
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wrapping logic around heavily-cached database queries.
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"""
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if len(user_id_list) < 2:
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defer.returnValue(True)
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deferreds = [self.get_rooms_for_user(u) for u in user_id_list]
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results = yield defer.DeferredList(deferreds, consumeErrors=True)
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# A list of sets of strings giving room IDs for each user
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room_id_lists = [set([r.room_id for r in result[1]]) for result in results]
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# There isn't a setintersection(*list_of_sets)
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ret = len(room_id_lists.pop(0).intersection(*room_id_lists)) > 0
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defer.returnValue(ret)
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@defer.inlineCallbacks
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def forget(self, user_id, room_id):
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"""Indicate that user_id wishes to discard history for room_id."""
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def f(txn):
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sql = (
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"UPDATE"
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" room_memberships"
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" SET"
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" forgotten = 1"
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" WHERE"
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" user_id = ?"
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" AND"
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" room_id = ?"
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)
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txn.execute(sql, (user_id, room_id))
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yield self.runInteraction("forget_membership", f)
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self.was_forgotten_at.invalidate_all()
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self.who_forgot_in_room.invalidate_all()
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self.did_forget.invalidate((user_id, room_id))
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@cachedInlineCallbacks(num_args=2)
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def did_forget(self, user_id, room_id):
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"""Returns whether user_id has elected to discard history for room_id.
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Returns False if they have since re-joined."""
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def f(txn):
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sql = (
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"SELECT"
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" COUNT(*)"
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" FROM"
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" room_memberships"
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" WHERE"
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" user_id = ?"
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" AND"
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" room_id = ?"
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" AND"
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" forgotten = 0"
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)
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txn.execute(sql, (user_id, room_id))
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rows = txn.fetchall()
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return rows[0][0]
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count = yield self.runInteraction("did_forget_membership", f)
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defer.returnValue(count == 0)
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@cachedInlineCallbacks(num_args=3)
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def was_forgotten_at(self, user_id, room_id, event_id):
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"""Returns whether user_id has elected to discard history for room_id at event_id.
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event_id must be a membership event."""
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def f(txn):
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sql = (
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"SELECT"
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" forgotten"
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" FROM"
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" room_memberships"
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" WHERE"
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" user_id = ?"
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" AND"
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" room_id = ?"
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" AND"
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" event_id = ?"
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)
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txn.execute(sql, (user_id, room_id, event_id))
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rows = txn.fetchall()
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return rows[0][0]
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forgot = yield self.runInteraction("did_forget_membership_at", f)
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defer.returnValue(forgot == 1)
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@cached()
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def who_forgot_in_room(self, room_id):
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return self._simple_select_list(
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table="room_memberships",
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retcols=("user_id", "event_id"),
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keyvalues={
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"room_id": room_id,
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"forgotten": 1,
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},
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desc="who_forgot"
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)
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