MatrixSynapse/synapse/storage/roommember.py

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# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
# 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.
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from twisted.internet import defer
from collections import namedtuple
from ._base import SQLBaseStore
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
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from synapse.api.constants import Membership, EventTypes
from synapse.types import get_domain_from_id
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import logging
logger = logging.getLogger(__name__)
RoomsForUser = namedtuple(
"RoomsForUser",
("room_id", "sender", "membership", "event_id", "stream_ordering")
)
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class RoomMemberStore(SQLBaseStore):
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def _store_room_members_txn(self, txn, events, backfilled):
"""Store a room member in the database.
"""
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self._simple_insert_many_txn(
txn,
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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
]
)
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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,))
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txn.call_after(
self._membership_stream_cache.entity_has_changed,
event.state_key, event.internal_metadata.stream_ordering
)
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txn.call_after(
self.get_invited_rooms_for_user.invalidate, (event.state_key,)
)
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# 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.
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is_new_state = not backfilled and (
not event.internal_metadata.is_outlier()
or event.internal_metadata.is_invite_from_remote()
)
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is_mine = self.hs.is_mine_id(event.state_key)
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if is_new_state and is_mine:
if event.membership == Membership.INVITE:
self._simple_insert_txn(
txn,
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table="local_invites",
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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 = (
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"UPDATE local_invites SET stream_id = ?, replaced_by = ? WHERE"
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" 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):
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rows = self._get_members_rows_txn(
txn,
room_id=room_id,
membership=Membership.JOIN,
)
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return [r["user_id"] for r in rows]
return self.runInteraction("get_users_in_room", f)
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@cached()
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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:
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A deferred list of RoomsForUser.
"""
return self.get_rooms_for_user_where_membership_is(
user_id, [Membership.INVITE]
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)
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@defer.inlineCallbacks
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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.
"""
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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)
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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.
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"""
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,
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membership_list):
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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"
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" FROM local_invites as i"
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" 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
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@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))
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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 = (
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"SELECT m.* FROM room_memberships as m"
" INNER JOIN current_state_events as c"
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" ON m.event_id = c.event_id "
" AND m.room_id = c.room_id "
" AND m.user_id = c.state_key"
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" WHERE %(where)s"
) % {
"where": where_clause,
}
txn.execute(sql, where_values)
rows = self.cursor_to_dict(txn)
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return rows
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@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],
)
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def forget(self, user_id, room_id):
"""Indicate that user_id wishes to discard history for room_id."""
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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)
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@cachedInlineCallbacks(num_args=2)
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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."""
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def f(txn):
sql = (
"SELECT"
" COUNT(*)"
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" FROM"
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" room_memberships"
" WHERE"
" user_id = ?"
" AND"
" room_id = ?"
" AND"
" forgotten = 0"
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)
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"
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" 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]
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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,
}
)
defer.returnValue(set(row["user_id"] for row in rows))