summary refs log tree commit diff
path: root/synapse/storage/databases/main/receipts.py
blob: 01a42813011af71e99ae13191a87660cc4eec4c6 (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
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2018 New Vector 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.

import logging
from typing import Any, Dict, Iterable, List, Optional, Tuple

from twisted.internet import defer

from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import ReceiptsStream
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.database import DatabasePool
from synapse.storage.engines import PostgresEngine
from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator
from synapse.types import JsonDict
from synapse.util import json_encoder
from synapse.util.caches.descriptors import cached, cachedList
from synapse.util.caches.stream_change_cache import StreamChangeCache

logger = logging.getLogger(__name__)


class ReceiptsWorkerStore(SQLBaseStore):
    def __init__(self, database: DatabasePool, db_conn, hs):
        self._instance_name = hs.get_instance_name()

        if isinstance(database.engine, PostgresEngine):
            self._can_write_to_receipts = (
                self._instance_name in hs.config.worker.writers.receipts
            )

            self._receipts_id_gen = MultiWriterIdGenerator(
                db_conn=db_conn,
                db=database,
                stream_name="receipts",
                instance_name=self._instance_name,
                tables=[("receipts_linearized", "instance_name", "stream_id")],
                sequence_name="receipts_sequence",
                writers=hs.config.worker.writers.receipts,
            )
        else:
            self._can_write_to_receipts = True

            # We shouldn't be running in worker mode with SQLite, but its useful
            # to support it for unit tests.
            #
            # If this process is the writer than we need to use
            # `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets
            # updated over replication. (Multiple writers are not supported for
            # SQLite).
            if hs.get_instance_name() in hs.config.worker.writers.receipts:
                self._receipts_id_gen = StreamIdGenerator(
                    db_conn, "receipts_linearized", "stream_id"
                )
            else:
                self._receipts_id_gen = SlavedIdTracker(
                    db_conn, "receipts_linearized", "stream_id"
                )

        super().__init__(database, db_conn, hs)

        self._receipts_stream_cache = StreamChangeCache(
            "ReceiptsRoomChangeCache", self.get_max_receipt_stream_id()
        )

    def get_max_receipt_stream_id(self):
        """Get the current max stream ID for receipts stream

        Returns:
            int
        """
        return self._receipts_id_gen.get_current_token()

    @cached()
    async def get_users_with_read_receipts_in_room(self, room_id):
        receipts = await self.get_receipts_for_room(room_id, "m.read")
        return {r["user_id"] for r in receipts}

    @cached(num_args=2)
    async def get_receipts_for_room(
        self, room_id: str, receipt_type: str
    ) -> List[Dict[str, Any]]:
        return await self.db_pool.simple_select_list(
            table="receipts_linearized",
            keyvalues={"room_id": room_id, "receipt_type": receipt_type},
            retcols=("user_id", "event_id"),
            desc="get_receipts_for_room",
        )

    @cached(num_args=3)
    async def get_last_receipt_event_id_for_user(
        self, user_id: str, room_id: str, receipt_type: str
    ) -> Optional[str]:
        return await self.db_pool.simple_select_one_onecol(
            table="receipts_linearized",
            keyvalues={
                "room_id": room_id,
                "receipt_type": receipt_type,
                "user_id": user_id,
            },
            retcol="event_id",
            desc="get_own_receipt_for_user",
            allow_none=True,
        )

    @cached(num_args=2)
    async def get_receipts_for_user(self, user_id, receipt_type):
        rows = await self.db_pool.simple_select_list(
            table="receipts_linearized",
            keyvalues={"user_id": user_id, "receipt_type": receipt_type},
            retcols=("room_id", "event_id"),
            desc="get_receipts_for_user",
        )

        return {row["room_id"]: row["event_id"] for row in rows}

    async def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
        def f(txn):
            sql = (
                "SELECT rl.room_id, rl.event_id,"
                " e.topological_ordering, e.stream_ordering"
                " FROM receipts_linearized AS rl"
                " INNER JOIN events AS e USING (room_id, event_id)"
                " WHERE rl.room_id = e.room_id"
                " AND rl.event_id = e.event_id"
                " AND user_id = ?"
            )
            txn.execute(sql, (user_id,))
            return txn.fetchall()

        rows = await self.db_pool.runInteraction(
            "get_receipts_for_user_with_orderings", f
        )
        return {
            row[0]: {
                "event_id": row[1],
                "topological_ordering": row[2],
                "stream_ordering": row[3],
            }
            for row in rows
        }

    async def get_linearized_receipts_for_rooms(
        self, room_ids: Iterable[str], to_key: int, from_key: Optional[int] = None
    ) -> List[dict]:
        """Get receipts for multiple rooms for sending to clients.

        Args:
            room_id: The room IDs to fetch receipts of.
            to_key: Max stream id to fetch receipts up to.
            from_key: Min stream id to fetch receipts from. None fetches
                from the start.

        Returns:
            A list of receipts.
        """
        room_ids = set(room_ids)

        if from_key is not None:
            # Only ask the database about rooms where there have been new
            # receipts added since `from_key`
            room_ids = self._receipts_stream_cache.get_entities_changed(
                room_ids, from_key
            )

        results = await self._get_linearized_receipts_for_rooms(
            room_ids, to_key, from_key=from_key
        )

        return [ev for res in results.values() for ev in res]

    async def get_linearized_receipts_for_room(
        self, room_id: str, to_key: int, from_key: Optional[int] = None
    ) -> List[dict]:
        """Get receipts for a single room for sending to clients.

        Args:
            room_ids: The room id.
            to_key: Max stream id to fetch receipts up to.
            from_key: Min stream id to fetch receipts from. None fetches
                from the start.

        Returns:
            A list of receipts.
        """
        if from_key is not None:
            # Check the cache first to see if any new receipts have been added
            # since`from_key`. If not we can no-op.
            if not self._receipts_stream_cache.has_entity_changed(room_id, from_key):
                return []

        return await self._get_linearized_receipts_for_room(room_id, to_key, from_key)

    @cached(num_args=3, tree=True)
    async def _get_linearized_receipts_for_room(
        self, room_id: str, to_key: int, from_key: Optional[int] = None
    ) -> List[dict]:
        """See get_linearized_receipts_for_room"""

        def f(txn):
            if from_key:
                sql = (
                    "SELECT * FROM receipts_linearized WHERE"
                    " room_id = ? AND stream_id > ? AND stream_id <= ?"
                )

                txn.execute(sql, (room_id, from_key, to_key))
            else:
                sql = (
                    "SELECT * FROM receipts_linearized WHERE"
                    " room_id = ? AND stream_id <= ?"
                )

                txn.execute(sql, (room_id, to_key))

            rows = self.db_pool.cursor_to_dict(txn)

            return rows

        rows = await self.db_pool.runInteraction("get_linearized_receipts_for_room", f)

        if not rows:
            return []

        content = {}
        for row in rows:
            content.setdefault(row["event_id"], {}).setdefault(row["receipt_type"], {})[
                row["user_id"]
            ] = db_to_json(row["data"])

        return [{"type": "m.receipt", "room_id": room_id, "content": content}]

    @cachedList(
        cached_method_name="_get_linearized_receipts_for_room",
        list_name="room_ids",
        num_args=3,
    )
    async def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
        if not room_ids:
            return {}

        def f(txn):
            if from_key:
                sql = """
                    SELECT * FROM receipts_linearized WHERE
                    stream_id > ? AND stream_id <= ? AND
                """
                clause, args = make_in_list_sql_clause(
                    self.database_engine, "room_id", room_ids
                )

                txn.execute(sql + clause, [from_key, to_key] + list(args))
            else:
                sql = """
                    SELECT * FROM receipts_linearized WHERE
                    stream_id <= ? AND
                """

                clause, args = make_in_list_sql_clause(
                    self.database_engine, "room_id", room_ids
                )

                txn.execute(sql + clause, [to_key] + list(args))

            return self.db_pool.cursor_to_dict(txn)

        txn_results = await self.db_pool.runInteraction(
            "_get_linearized_receipts_for_rooms", f
        )

        results = {}
        for row in txn_results:
            # We want a single event per room, since we want to batch the
            # receipts by room, event and type.
            room_event = results.setdefault(
                row["room_id"],
                {"type": "m.receipt", "room_id": row["room_id"], "content": {}},
            )

            # The content is of the form:
            # {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
            event_entry = room_event["content"].setdefault(row["event_id"], {})
            receipt_type = event_entry.setdefault(row["receipt_type"], {})

            receipt_type[row["user_id"]] = db_to_json(row["data"])

        results = {
            room_id: [results[room_id]] if room_id in results else []
            for room_id in room_ids
        }
        return results

    @cached(
        num_args=2,
    )
    async def get_linearized_receipts_for_all_rooms(
        self, to_key: int, from_key: Optional[int] = None
    ) -> Dict[str, JsonDict]:
        """Get receipts for all rooms between two stream_ids, up
        to a limit of the latest 100 read receipts.

        Args:
            to_key: Max stream id to fetch receipts up to.
            from_key: Min stream id to fetch receipts from. None fetches
                from the start.

        Returns:
            A dictionary of roomids to a list of receipts.
        """

        def f(txn):
            if from_key:
                sql = """
                    SELECT * FROM receipts_linearized WHERE
                    stream_id > ? AND stream_id <= ?
                    ORDER BY stream_id DESC
                    LIMIT 100
                """
                txn.execute(sql, [from_key, to_key])
            else:
                sql = """
                    SELECT * FROM receipts_linearized WHERE
                    stream_id <= ?
                    ORDER BY stream_id DESC
                    LIMIT 100
                """

                txn.execute(sql, [to_key])

            return self.db_pool.cursor_to_dict(txn)

        txn_results = await self.db_pool.runInteraction(
            "get_linearized_receipts_for_all_rooms", f
        )

        results = {}
        for row in txn_results:
            # We want a single event per room, since we want to batch the
            # receipts by room, event and type.
            room_event = results.setdefault(
                row["room_id"],
                {"type": "m.receipt", "room_id": row["room_id"], "content": {}},
            )

            # The content is of the form:
            # {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
            event_entry = room_event["content"].setdefault(row["event_id"], {})
            receipt_type = event_entry.setdefault(row["receipt_type"], {})

            receipt_type[row["user_id"]] = db_to_json(row["data"])

        return results

    async def get_users_sent_receipts_between(
        self, last_id: int, current_id: int
    ) -> List[str]:
        """Get all users who sent receipts between `last_id` exclusive and
        `current_id` inclusive.

        Returns:
            The list of users.
        """

        if last_id == current_id:
            return defer.succeed([])

        def _get_users_sent_receipts_between_txn(txn):
            sql = """
                SELECT DISTINCT user_id FROM receipts_linearized
                WHERE ? < stream_id AND stream_id <= ?
            """
            txn.execute(sql, (last_id, current_id))

            return [r[0] for r in txn]

        return await self.db_pool.runInteraction(
            "get_users_sent_receipts_between", _get_users_sent_receipts_between_txn
        )

    async def get_all_updated_receipts(
        self, instance_name: str, last_id: int, current_id: int, limit: int
    ) -> Tuple[List[Tuple[int, list]], int, bool]:
        """Get updates for receipts replication stream.

        Args:
            instance_name: The writer we want to fetch updates from. Unused
                here since there is only ever one writer.
            last_id: The token to fetch updates from. Exclusive.
            current_id: The token to fetch updates up to. Inclusive.
            limit: The requested limit for the number of rows to return. The
                function may return more or fewer rows.

        Returns:
            A tuple consisting of: the updates, a token to use to fetch
            subsequent updates, and whether we returned fewer rows than exists
            between the requested tokens due to the limit.

            The token returned can be used in a subsequent call to this
            function to get further updatees.

            The updates are a list of 2-tuples of stream ID and the row data
        """

        if last_id == current_id:
            return [], current_id, False

        def get_all_updated_receipts_txn(txn):
            sql = """
                SELECT stream_id, room_id, receipt_type, user_id, event_id, data
                FROM receipts_linearized
                WHERE ? < stream_id AND stream_id <= ?
                ORDER BY stream_id ASC
                LIMIT ?
            """
            txn.execute(sql, (last_id, current_id, limit))

            updates = [(r[0], r[1:5] + (db_to_json(r[5]),)) for r in txn]

            limited = False
            upper_bound = current_id

            if len(updates) == limit:
                limited = True
                upper_bound = updates[-1][0]

            return updates, upper_bound, limited

        return await self.db_pool.runInteraction(
            "get_all_updated_receipts", get_all_updated_receipts_txn
        )

    def _invalidate_get_users_with_receipts_in_room(
        self, room_id: str, receipt_type: str, user_id: str
    ):
        if receipt_type != "m.read":
            return

        res = self.get_users_with_read_receipts_in_room.cache.get_immediate(
            room_id, None, update_metrics=False
        )

        if res and user_id in res:
            # We'd only be adding to the set, so no point invalidating if the
            # user is already there
            return

        self.get_users_with_read_receipts_in_room.invalidate((room_id,))

    def invalidate_caches_for_receipt(self, room_id, receipt_type, user_id):
        self.get_receipts_for_user.invalidate((user_id, receipt_type))
        self._get_linearized_receipts_for_room.invalidate((room_id,))
        self.get_last_receipt_event_id_for_user.invalidate(
            (user_id, room_id, receipt_type)
        )
        self._invalidate_get_users_with_receipts_in_room(room_id, receipt_type, user_id)
        self.get_receipts_for_room.invalidate((room_id, receipt_type))

    def process_replication_rows(self, stream_name, instance_name, token, rows):
        if stream_name == ReceiptsStream.NAME:
            self._receipts_id_gen.advance(instance_name, token)
            for row in rows:
                self.invalidate_caches_for_receipt(
                    row.room_id, row.receipt_type, row.user_id
                )
                self._receipts_stream_cache.entity_has_changed(row.room_id, token)

        return super().process_replication_rows(stream_name, instance_name, token, rows)

    def insert_linearized_receipt_txn(
        self, txn, room_id, receipt_type, user_id, event_id, data, stream_id
    ):
        """Inserts a read-receipt into the database if it's newer than the current RR

        Returns: int|None
            None if the RR is older than the current RR
            otherwise, the rx timestamp of the event that the RR corresponds to
                (or 0 if the event is unknown)
        """
        assert self._can_write_to_receipts

        res = self.db_pool.simple_select_one_txn(
            txn,
            table="events",
            retcols=["stream_ordering", "received_ts"],
            keyvalues={"event_id": event_id},
            allow_none=True,
        )

        stream_ordering = int(res["stream_ordering"]) if res else None
        rx_ts = res["received_ts"] if res else 0

        # We don't want to clobber receipts for more recent events, so we
        # have to compare orderings of existing receipts
        if stream_ordering is not None:
            sql = (
                "SELECT stream_ordering, event_id FROM events"
                " INNER JOIN receipts_linearized as r USING (event_id, room_id)"
                " WHERE r.room_id = ? AND r.receipt_type = ? AND r.user_id = ?"
            )
            txn.execute(sql, (room_id, receipt_type, user_id))

            for so, eid in txn:
                if int(so) >= stream_ordering:
                    logger.debug(
                        "Ignoring new receipt for %s in favour of existing "
                        "one for later event %s",
                        event_id,
                        eid,
                    )
                    return None

        txn.call_after(
            self.invalidate_caches_for_receipt, room_id, receipt_type, user_id
        )

        txn.call_after(
            self._receipts_stream_cache.entity_has_changed, room_id, stream_id
        )

        self.db_pool.simple_upsert_txn(
            txn,
            table="receipts_linearized",
            keyvalues={
                "room_id": room_id,
                "receipt_type": receipt_type,
                "user_id": user_id,
            },
            values={
                "stream_id": stream_id,
                "event_id": event_id,
                "data": json_encoder.encode(data),
            },
            # receipts_linearized has a unique constraint on
            # (user_id, room_id, receipt_type), so no need to lock
            lock=False,
        )

        if receipt_type == "m.read" and stream_ordering is not None:
            self._remove_old_push_actions_before_txn(
                txn, room_id=room_id, user_id=user_id, stream_ordering=stream_ordering
            )

        return rx_ts

    async def insert_receipt(
        self,
        room_id: str,
        receipt_type: str,
        user_id: str,
        event_ids: List[str],
        data: dict,
    ) -> Optional[Tuple[int, int]]:
        """Insert a receipt, either from local client or remote server.

        Automatically does conversion between linearized and graph
        representations.
        """
        assert self._can_write_to_receipts

        if not event_ids:
            return None

        if len(event_ids) == 1:
            linearized_event_id = event_ids[0]
        else:
            # we need to points in graph -> linearized form.
            # TODO: Make this better.
            def graph_to_linear(txn):
                clause, args = make_in_list_sql_clause(
                    self.database_engine, "event_id", event_ids
                )

                sql = """
                    SELECT event_id WHERE room_id = ? AND stream_ordering IN (
                        SELECT max(stream_ordering) WHERE %s
                    )
                """ % (
                    clause,
                )

                txn.execute(sql, [room_id] + list(args))
                rows = txn.fetchall()
                if rows:
                    return rows[0][0]
                else:
                    raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))

            linearized_event_id = await self.db_pool.runInteraction(
                "insert_receipt_conv", graph_to_linear
            )

        async with self._receipts_id_gen.get_next() as stream_id:
            event_ts = await self.db_pool.runInteraction(
                "insert_linearized_receipt",
                self.insert_linearized_receipt_txn,
                room_id,
                receipt_type,
                user_id,
                linearized_event_id,
                data,
                stream_id=stream_id,
            )

        if event_ts is None:
            return None

        now = self._clock.time_msec()
        logger.debug(
            "RR for event %s in %s (%i ms old)",
            linearized_event_id,
            room_id,
            now - event_ts,
        )

        await self.insert_graph_receipt(room_id, receipt_type, user_id, event_ids, data)

        max_persisted_id = self._receipts_id_gen.get_current_token()

        return stream_id, max_persisted_id

    async def insert_graph_receipt(
        self, room_id, receipt_type, user_id, event_ids, data
    ):
        assert self._can_write_to_receipts

        return await self.db_pool.runInteraction(
            "insert_graph_receipt",
            self.insert_graph_receipt_txn,
            room_id,
            receipt_type,
            user_id,
            event_ids,
            data,
        )

    def insert_graph_receipt_txn(
        self, txn, room_id, receipt_type, user_id, event_ids, data
    ):
        assert self._can_write_to_receipts

        txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type))
        txn.call_after(
            self._invalidate_get_users_with_receipts_in_room,
            room_id,
            receipt_type,
            user_id,
        )
        txn.call_after(self.get_receipts_for_user.invalidate, (user_id, receipt_type))
        # FIXME: This shouldn't invalidate the whole cache
        txn.call_after(self._get_linearized_receipts_for_room.invalidate, (room_id,))

        self.db_pool.simple_delete_txn(
            txn,
            table="receipts_graph",
            keyvalues={
                "room_id": room_id,
                "receipt_type": receipt_type,
                "user_id": user_id,
            },
        )
        self.db_pool.simple_insert_txn(
            txn,
            table="receipts_graph",
            values={
                "room_id": room_id,
                "receipt_type": receipt_type,
                "user_id": user_id,
                "event_ids": json_encoder.encode(event_ids),
                "data": json_encoder.encode(data),
            },
        )


class ReceiptsStore(ReceiptsWorkerStore):
    pass