summary refs log tree commit diff
path: root/synapse/handlers/initial_sync.py
blob: 5d4964076084cf693d0b725a4a69e30f847c1f78 (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
# Copyright 2016 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.

import logging
from typing import TYPE_CHECKING, Optional, Tuple

from twisted.internet import defer

from synapse.api.constants import EduTypes, EventTypes, Membership
from synapse.api.errors import SynapseError
from synapse.events.validator import EventValidator
from synapse.handlers.presence import format_user_presence_state
from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.storage.roommember import RoomsForUser
from synapse.streams.config import PaginationConfig
from synapse.types import JsonDict, Requester, RoomStreamToken, StreamToken, UserID
from synapse.util import unwrapFirstError
from synapse.util.async_helpers import concurrently_execute
from synapse.util.caches.response_cache import ResponseCache
from synapse.visibility import filter_events_for_client

from ._base import BaseHandler

if TYPE_CHECKING:
    from synapse.server import HomeServer


logger = logging.getLogger(__name__)


class InitialSyncHandler(BaseHandler):
    def __init__(self, hs: "HomeServer"):
        super().__init__(hs)
        self.hs = hs
        self.state = hs.get_state_handler()
        self.clock = hs.get_clock()
        self.validator = EventValidator()
        self.snapshot_cache: ResponseCache[
            Tuple[
                str,
                Optional[StreamToken],
                Optional[StreamToken],
                str,
                Optional[int],
                bool,
                bool,
            ]
        ] = ResponseCache(hs.get_clock(), "initial_sync_cache")
        self._event_serializer = hs.get_event_client_serializer()
        self.storage = hs.get_storage()
        self.state_store = self.storage.state

    async def snapshot_all_rooms(
        self,
        user_id: str,
        pagin_config: PaginationConfig,
        as_client_event: bool = True,
        include_archived: bool = False,
    ) -> JsonDict:
        """Retrieve a snapshot of all rooms the user is invited or has joined.

        This snapshot may include messages for all rooms where the user is
        joined, depending on the pagination config.

        Args:
            user_id: The ID of the user making the request.
            pagin_config: The pagination config used to determine how many
                messages *PER ROOM* to return.
            as_client_event: True to get events in client-server format.
            include_archived: True to get rooms that the user has left
        Returns:
            A JsonDict with the same format as the response to `/intialSync`
            API
        """
        key = (
            user_id,
            pagin_config.from_token,
            pagin_config.to_token,
            pagin_config.direction,
            pagin_config.limit,
            as_client_event,
            include_archived,
        )

        return await self.snapshot_cache.wrap(
            key,
            self._snapshot_all_rooms,
            user_id,
            pagin_config,
            as_client_event,
            include_archived,
        )

    async def _snapshot_all_rooms(
        self,
        user_id: str,
        pagin_config: PaginationConfig,
        as_client_event: bool = True,
        include_archived: bool = False,
    ) -> JsonDict:

        memberships = [Membership.INVITE, Membership.JOIN]
        if include_archived:
            memberships.append(Membership.LEAVE)

        room_list = await self.store.get_rooms_for_local_user_where_membership_is(
            user_id=user_id, membership_list=memberships
        )

        user = UserID.from_string(user_id)

        rooms_ret = []

        now_token = self.hs.get_event_sources().get_current_token()

        presence_stream = self.hs.get_event_sources().sources["presence"]
        presence, _ = await presence_stream.get_new_events(
            user, from_key=None, include_offline=False
        )

        joined_rooms = [r.room_id for r in room_list if r.membership == Membership.JOIN]
        receipt = await self.store.get_linearized_receipts_for_rooms(
            joined_rooms,
            to_key=int(now_token.receipt_key),
        )

        tags_by_room = await self.store.get_tags_for_user(user_id)

        account_data, account_data_by_room = await self.store.get_account_data_for_user(
            user_id
        )

        public_room_ids = await self.store.get_public_room_ids()

        limit = pagin_config.limit
        if limit is None:
            limit = 10

        async def handle_room(event: RoomsForUser):
            d = {
                "room_id": event.room_id,
                "membership": event.membership,
                "visibility": (
                    "public" if event.room_id in public_room_ids else "private"
                ),
            }

            if event.membership == Membership.INVITE:
                time_now = self.clock.time_msec()
                d["inviter"] = event.sender

                invite_event = await self.store.get_event(event.event_id)
                d["invite"] = await self._event_serializer.serialize_event(
                    invite_event, time_now, as_client_event
                )

            rooms_ret.append(d)

            if event.membership not in (Membership.JOIN, Membership.LEAVE):
                return

            try:
                if event.membership == Membership.JOIN:
                    room_end_token = now_token.room_key
                    deferred_room_state = run_in_background(
                        self.state_handler.get_current_state, event.room_id
                    )
                elif event.membership == Membership.LEAVE:
                    room_end_token = RoomStreamToken(
                        None,
                        event.stream_ordering,
                    )
                    deferred_room_state = run_in_background(
                        self.state_store.get_state_for_events, [event.event_id]
                    )
                    deferred_room_state.addCallback(
                        lambda states: states[event.event_id]
                    )

                (messages, token), current_state = await make_deferred_yieldable(
                    defer.gatherResults(
                        [
                            run_in_background(
                                self.store.get_recent_events_for_room,
                                event.room_id,
                                limit=limit,
                                end_token=room_end_token,
                            ),
                            deferred_room_state,
                        ]
                    )
                ).addErrback(unwrapFirstError)

                messages = await filter_events_for_client(
                    self.storage, user_id, messages
                )

                start_token = now_token.copy_and_replace("room_key", token)
                end_token = now_token.copy_and_replace("room_key", room_end_token)
                time_now = self.clock.time_msec()

                d["messages"] = {
                    "chunk": (
                        await self._event_serializer.serialize_events(
                            messages, time_now=time_now, as_client_event=as_client_event
                        )
                    ),
                    "start": await start_token.to_string(self.store),
                    "end": await end_token.to_string(self.store),
                }

                d["state"] = await self._event_serializer.serialize_events(
                    current_state.values(),
                    time_now=time_now,
                    as_client_event=as_client_event,
                )

                account_data_events = []
                tags = tags_by_room.get(event.room_id)
                if tags:
                    account_data_events.append(
                        {"type": "m.tag", "content": {"tags": tags}}
                    )

                account_data = account_data_by_room.get(event.room_id, {})
                for account_data_type, content in account_data.items():
                    account_data_events.append(
                        {"type": account_data_type, "content": content}
                    )

                d["account_data"] = account_data_events
            except Exception:
                logger.exception("Failed to get snapshot")

        await concurrently_execute(handle_room, room_list, 10)

        account_data_events = []
        for account_data_type, content in account_data.items():
            account_data_events.append({"type": account_data_type, "content": content})

        now = self.clock.time_msec()

        ret = {
            "rooms": rooms_ret,
            "presence": [
                {
                    "type": "m.presence",
                    "content": format_user_presence_state(event, now),
                }
                for event in presence
            ],
            "account_data": account_data_events,
            "receipts": receipt,
            "end": await now_token.to_string(self.store),
        }

        return ret

    async def room_initial_sync(
        self, requester: Requester, room_id: str, pagin_config: PaginationConfig
    ) -> JsonDict:
        """Capture the a snapshot of a room. If user is currently a member of
        the room this will be what is currently in the room. If the user left
        the room this will be what was in the room when they left.

        Args:
            requester: The user to get a snapshot for.
            room_id: The room to get a snapshot of.
            pagin_config: The pagination config used to determine how many
                messages to return.
        Raises:
            AuthError if the user wasn't in the room.
        Returns:
            A JSON serialisable dict with the snapshot of the room.
        """

        blocked = await self.store.is_room_blocked(room_id)
        if blocked:
            raise SynapseError(403, "This room has been blocked on this server")

        user_id = requester.user.to_string()

        (
            membership,
            member_event_id,
        ) = await self.auth.check_user_in_room_or_world_readable(
            room_id,
            user_id,
            allow_departed_users=True,
        )
        is_peeking = member_event_id is None

        if membership == Membership.JOIN:
            result = await self._room_initial_sync_joined(
                user_id, room_id, pagin_config, membership, is_peeking
            )
        elif membership == Membership.LEAVE:
            # The member_event_id will always be available if membership is set
            # to leave.
            assert member_event_id

            result = await self._room_initial_sync_parted(
                user_id, room_id, pagin_config, membership, member_event_id, is_peeking
            )

        account_data_events = []
        tags = await self.store.get_tags_for_room(user_id, room_id)
        if tags:
            account_data_events.append({"type": "m.tag", "content": {"tags": tags}})

        account_data = await self.store.get_account_data_for_room(user_id, room_id)
        for account_data_type, content in account_data.items():
            account_data_events.append({"type": account_data_type, "content": content})

        result["account_data"] = account_data_events

        return result

    async def _room_initial_sync_parted(
        self,
        user_id: str,
        room_id: str,
        pagin_config: PaginationConfig,
        membership: str,
        member_event_id: str,
        is_peeking: bool,
    ) -> JsonDict:
        room_state = await self.state_store.get_state_for_event(member_event_id)

        limit = pagin_config.limit if pagin_config else None
        if limit is None:
            limit = 10

        leave_position = await self.store.get_position_for_event(member_event_id)
        stream_token = leave_position.to_room_stream_token()

        messages, token = await self.store.get_recent_events_for_room(
            room_id, limit=limit, end_token=stream_token
        )

        messages = await filter_events_for_client(
            self.storage, user_id, messages, is_peeking=is_peeking
        )

        start_token = StreamToken.START.copy_and_replace("room_key", token)
        end_token = StreamToken.START.copy_and_replace("room_key", stream_token)

        time_now = self.clock.time_msec()

        return {
            "membership": membership,
            "room_id": room_id,
            "messages": {
                "chunk": (
                    await self._event_serializer.serialize_events(messages, time_now)
                ),
                "start": await start_token.to_string(self.store),
                "end": await end_token.to_string(self.store),
            },
            "state": (
                await self._event_serializer.serialize_events(
                    room_state.values(), time_now
                )
            ),
            "presence": [],
            "receipts": [],
        }

    async def _room_initial_sync_joined(
        self,
        user_id: str,
        room_id: str,
        pagin_config: PaginationConfig,
        membership: str,
        is_peeking: bool,
    ) -> JsonDict:
        current_state = await self.state.get_current_state(room_id=room_id)

        # TODO: These concurrently
        time_now = self.clock.time_msec()
        state = await self._event_serializer.serialize_events(
            current_state.values(), time_now
        )

        now_token = self.hs.get_event_sources().get_current_token()

        limit = pagin_config.limit if pagin_config else None
        if limit is None:
            limit = 10

        room_members = [
            m
            for m in current_state.values()
            if m.type == EventTypes.Member
            and m.content["membership"] == Membership.JOIN
        ]

        presence_handler = self.hs.get_presence_handler()

        async def get_presence():
            # If presence is disabled, return an empty list
            if not self.hs.config.use_presence:
                return []

            states = await presence_handler.get_states(
                [m.user_id for m in room_members]
            )

            return [
                {
                    "type": EduTypes.Presence,
                    "content": format_user_presence_state(s, time_now),
                }
                for s in states
            ]

        async def get_receipts():
            receipts = await self.store.get_linearized_receipts_for_room(
                room_id, to_key=now_token.receipt_key
            )
            if not receipts:
                receipts = []
            return receipts

        presence, receipts, (messages, token) = await make_deferred_yieldable(
            defer.gatherResults(
                [
                    run_in_background(get_presence),
                    run_in_background(get_receipts),
                    run_in_background(
                        self.store.get_recent_events_for_room,
                        room_id,
                        limit=limit,
                        end_token=now_token.room_key,
                    ),
                ],
                consumeErrors=True,
            ).addErrback(unwrapFirstError)
        )

        messages = await filter_events_for_client(
            self.storage, user_id, messages, is_peeking=is_peeking
        )

        start_token = now_token.copy_and_replace("room_key", token)
        end_token = now_token

        time_now = self.clock.time_msec()

        ret = {
            "room_id": room_id,
            "messages": {
                "chunk": (
                    await self._event_serializer.serialize_events(messages, time_now)
                ),
                "start": await start_token.to_string(self.store),
                "end": await end_token.to_string(self.store),
            },
            "state": state,
            "presence": presence,
            "receipts": receipts,
        }
        if not is_peeking:
            ret["membership"] = membership

        return ret