summary refs log tree commit diff
path: root/synapse/storage/roommember.py
blob: 4e0e9ab59a8b3923aa14a330b748f84010b47de9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
# -*- 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
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks

from synapse.api.constants import Membership
from synapse.types import UserID

import logging

logger = logging.getLogger(__name__)


RoomsForUser = namedtuple(
    "RoomsForUser",
    ("room_id", "sender", "membership", "event_id", "stream_ordering")
)


class RoomMemberStore(SQLBaseStore):

    def _store_room_members_txn(self, txn, events):
        """Store a room member in the database.
        """
        self._simple_insert_many_txn(
            txn,
            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
            ]
        )

        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,))

    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(max_entries=5000)
    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)

    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_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([
            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
        ]))

    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) 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)
        return [
            RoomsForUser(**r) for r in self.cursor_to_dict(txn)
        ]

    @cached(max_entries=5000)
    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_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)

    @defer.inlineCallbacks
    def forget(self, user_id, room_id):
        """Indicate that user_id wishes to discard history for room_id."""
        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.did_forget.invalidate((user_id, room_id))

    @cachedInlineCallbacks(num_args=2)
    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."""
        def f(txn):
            sql = (
                "SELECT"
                "  COUNT(*)"
                " FROM"
                "  room_memberships"
                " WHERE"
                "  user_id = ?"
                " AND"
                "  room_id = ?"
                " AND"
                "  forgotten = 0"
            )
            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"
                "  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]
        forgot = yield self.runInteraction("did_forget_membership_at", f)
        defer.returnValue(forgot == 1)