forked-synapse/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
from synapse.types import UserID
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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):
"""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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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.
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"""
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(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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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)
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@cached()
def get_invites_for_user(self, user_id):
""" Get all the invite events for a user
Args:
user_id (str): The user ID.
Returns:
A deferred list of event objects.
"""
return self.get_rooms_for_user_where_membership_is(
user_id, [Membership.INVITE]
).addCallback(lambda invites: self._get_events([
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invite.event_id for invite in invites
]))
def get_leave_and_ban_events_for_user(self, user_id):
""" Get all the leave events for a user
Args:
user_id (str): The user ID.
Returns:
A deferred list of event objects.
"""
return self.get_rooms_for_user_where_membership_is(
user_id, (Membership.LEAVE, Membership.BAN)
).addCallback(lambda leaves: self._get_events([
leave.event_id for leave in leaves
]))
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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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where_clause = "user_id = ? AND (%s) AND forgotten = 0" % (
" OR ".join(["membership = ?" for _ in membership_list]),
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)
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"
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" 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)
]
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@cached(max_entries=5000)
def get_joined_hosts_for_room(self, room_id):
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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
)
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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):
rows = self._get_members_rows_txn(
txn,
room_id, membership, user_id,
)
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):
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],
)
@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)
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@defer.inlineCallbacks
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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))
yield self.runInteraction("forget_membership", f)
self.was_forgotten_at.invalidate_all()
self.who_forgot_in_room.invalidate_all()
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):
"""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"
)