summary refs log tree commit diff
path: root/synapse/handlers/room.py
blob: 3da08c147e0349b19fa6054ad1d25961a913c892 (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
# -*- 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.

"""Contains functions for performing events on rooms."""
from twisted.internet import defer

from ._base import BaseHandler

from synapse.types import UserID, RoomAlias, RoomID
from synapse.api.constants import EventTypes, Membership, JoinRules
from synapse.api.errors import StoreError, SynapseError
from synapse.util import stringutils
from synapse.util.async import run_on_reactor
from synapse.events.utils import serialize_event

import logging

logger = logging.getLogger(__name__)


class RoomCreationHandler(BaseHandler):

    @defer.inlineCallbacks
    def create_room(self, user_id, room_id, config):
        """ Creates a new room.

        Args:
            user_id (str): The ID of the user creating the new room.
            room_id (str): The proposed ID for the new room. Can be None, in
            which case one will be created for you.
            config (dict) : A dict of configuration options.
        Returns:
            The new room ID.
        Raises:
            SynapseError if the room ID was taken, couldn't be stored, or
            something went horribly wrong.
        """
        self.ratelimit(user_id)

        if "room_alias_name" in config:
            room_alias = RoomAlias.create(
                config["room_alias_name"],
                self.hs.hostname,
            )
            mapping = yield self.store.get_association_from_room_alias(
                room_alias
            )

            if mapping:
                raise SynapseError(400, "Room alias already taken")
        else:
            room_alias = None

        invite_list = config.get("invite", [])
        for i in invite_list:
            try:
                UserID.from_string(i)
            except:
                raise SynapseError(400, "Invalid user_id: %s" % (i,))

        is_public = config.get("visibility", None) == "public"

        if room_id:
            # Ensure room_id is the correct type
            room_id_obj = RoomID.from_string(room_id)
            if not self.hs.is_mine(room_id_obj):
                raise SynapseError(400, "Room id must be local")

            yield self.store.store_room(
                room_id=room_id,
                room_creator_user_id=user_id,
                is_public=is_public
            )
        else:
            # autogen room IDs and try to create it. We may clash, so just
            # try a few times till one goes through, giving up eventually.
            attempts = 0
            room_id = None
            while attempts < 5:
                try:
                    random_string = stringutils.random_string(18)
                    gen_room_id = RoomID.create(
                        random_string,
                        self.hs.hostname,
                    )
                    yield self.store.store_room(
                        room_id=gen_room_id.to_string(),
                        room_creator_user_id=user_id,
                        is_public=is_public
                    )
                    room_id = gen_room_id.to_string()
                    break
                except StoreError:
                    attempts += 1
            if not room_id:
                raise StoreError(500, "Couldn't generate a room ID.")

        if room_alias:
            directory_handler = self.hs.get_handlers().directory_handler
            yield directory_handler.create_association(
                user_id=user_id,
                room_id=room_id,
                room_alias=room_alias,
                servers=[self.hs.hostname],
            )

        user = UserID.from_string(user_id)
        creation_events = self._create_events_for_new_room(
            user, room_id, is_public=is_public
        )

        msg_handler = self.hs.get_handlers().message_handler

        for event in creation_events:
            yield msg_handler.create_and_send_event(event, ratelimit=False)

        if "name" in config:
            name = config["name"]
            yield msg_handler.create_and_send_event({
                "type": EventTypes.Name,
                "room_id": room_id,
                "sender": user_id,
                "state_key": "",
                "content": {"name": name},
            }, ratelimit=False)

        if "topic" in config:
            topic = config["topic"]
            yield msg_handler.create_and_send_event({
                "type": EventTypes.Topic,
                "room_id": room_id,
                "sender": user_id,
                "state_key": "",
                "content": {"topic": topic},
            }, ratelimit=False)

        for invitee in invite_list:
            yield msg_handler.create_and_send_event({
                "type": EventTypes.Member,
                "state_key": invitee,
                "room_id": room_id,
                "sender": user_id,
                "content": {"membership": Membership.INVITE},
            }, ratelimit=False)

        result = {"room_id": room_id}

        if room_alias:
            result["room_alias"] = room_alias.to_string()
            yield directory_handler.send_room_alias_update_event(
                user_id, room_id
            )

        defer.returnValue(result)

    def _create_events_for_new_room(self, creator, room_id, is_public=False):
        creator_id = creator.to_string()

        event_keys = {
            "room_id": room_id,
            "sender": creator_id,
            "state_key": "",
        }

        def create(etype, content, **kwargs):
            e = {
                "type": etype,
                "content": content,
            }

            e.update(event_keys)
            e.update(kwargs)

            return e

        creation_event = create(
            etype=EventTypes.Create,
            content={"creator": creator.to_string()},
        )

        join_event = create(
            etype=EventTypes.Member,
            state_key=creator_id,
            content={
                "membership": Membership.JOIN,
            },
        )

        power_levels_event = create(
            etype=EventTypes.PowerLevels,
            content={
                "users": {
                    creator.to_string(): 100,
                },
                "users_default": 0,
                "events": {
                    EventTypes.Name: 100,
                    EventTypes.PowerLevels: 100,
                },
                "events_default": 0,
                "state_default": 50,
                "ban": 50,
                "kick": 50,
                "redact": 50,
                "invite": 0,
            },
        )

        join_rule = JoinRules.PUBLIC if is_public else JoinRules.INVITE
        join_rules_event = create(
            etype=EventTypes.JoinRules,
            content={"join_rule": join_rule},
        )

        return [
            creation_event,
            join_event,
            power_levels_event,
            join_rules_event,
        ]


class RoomMemberHandler(BaseHandler):
    # TODO(paul): This handler currently contains a messy conflation of
    #   low-level API that works on UserID objects and so on, and REST-level
    #   API that takes ID strings and returns pagination chunks. These concerns
    #   ought to be separated out a lot better.

    def __init__(self, hs):
        super(RoomMemberHandler, self).__init__(hs)

        self.clock = hs.get_clock()

        self.distributor = hs.get_distributor()
        self.distributor.declare("user_joined_room")
        self.distributor.declare("user_left_room")

    @defer.inlineCallbacks
    def get_room_members(self, room_id):
        users = yield self.store.get_users_in_room(room_id)

        defer.returnValue([UserID.from_string(u) for u in users])

    @defer.inlineCallbacks
    def fetch_room_distributions_into(self, room_id, localusers=None,
                                      remotedomains=None, ignore_user=None):
        """Fetch the distribution of a room, adding elements to either
        'localusers' or 'remotedomains', which should be a set() if supplied.
        If ignore_user is set, ignore that user.

        This function returns nothing; its result is performed by the
        side-effect on the two passed sets. This allows easy accumulation of
        member lists of multiple rooms at once if required.
        """
        members = yield self.get_room_members(room_id)
        for member in members:
            if ignore_user is not None and member == ignore_user:
                continue

            if self.hs.is_mine(member):
                if localusers is not None:
                    localusers.add(member)
            else:
                if remotedomains is not None:
                    remotedomains.add(member.domain)

    @defer.inlineCallbacks
    def get_room_members_as_pagination_chunk(self, room_id=None, user_id=None,
                                             limit=0, start_tok=None,
                                             end_tok=None):
        """Retrieve a list of room members in the room.

        Args:
            room_id (str): The room to get the member list for.
            user_id (str): The ID of the user making the request.
            limit (int): The max number of members to return.
            start_tok (str): Optional. The start token if known.
            end_tok (str): Optional. The end token if known.
        Returns:
            dict: A Pagination streamable dict.
        Raises:
            SynapseError if something goes wrong.
        """
        yield self.auth.check_joined_room(room_id, user_id)

        member_list = yield self.store.get_room_members(room_id=room_id)
        time_now = self.clock.time_msec()
        event_list = [
            serialize_event(entry, time_now)
            for entry in member_list
        ]
        chunk_data = {
            "start": "START",  # FIXME (erikj): START is no longer valid
            "end": "END",
            "chunk": event_list
        }
        # TODO honor Pagination stream params
        # TODO snapshot this list to return on subsequent requests when
        # paginating
        defer.returnValue(chunk_data)

    @defer.inlineCallbacks
    def change_membership(self, event, context, do_auth=True):
        """ Change the membership status of a user in a room.

        Args:
            event (SynapseEvent): The membership event
        Raises:
            SynapseError if there was a problem changing the membership.
        """
        target_user_id = event.state_key

        prev_state = context.current_state.get(
            (EventTypes.Member, target_user_id),
            None
        )

        room_id = event.room_id

        # If we're trying to join a room then we have to do this differently
        # if this HS is not currently in the room, i.e. we have to do the
        # invite/join dance.
        if event.membership == Membership.JOIN:
            yield self._do_join(event, context, do_auth=do_auth)
        else:
            # This is not a JOIN, so we can handle it normally.

            # FIXME: This isn't idempotency.
            if prev_state and prev_state.membership == event.membership:
                # double same action, treat this event as a NOOP.
                defer.returnValue({})
                return

            yield self._do_local_membership_update(
                event,
                membership=event.content["membership"],
                context=context,
                do_auth=do_auth,
            )

            if prev_state and prev_state.membership == Membership.JOIN:
                user = UserID.from_string(event.user_id)
                self.distributor.fire(
                    "user_left_room", user=user, room_id=event.room_id
                )

        defer.returnValue({"room_id": room_id})

    @defer.inlineCallbacks
    def join_room_alias(self, joinee, room_alias, do_auth=True, content={}):
        directory_handler = self.hs.get_handlers().directory_handler
        mapping = yield directory_handler.get_association(room_alias)

        if not mapping:
            raise SynapseError(404, "No such room alias")

        room_id = mapping["room_id"]
        hosts = mapping["servers"]
        if not hosts:
            raise SynapseError(404, "No known servers")

        # If event doesn't include a display name, add one.
        yield self.distributor.fire(
            "collect_presencelike_data", joinee, content
        )

        content.update({"membership": Membership.JOIN})
        builder = self.event_builder_factory.new({
            "type": EventTypes.Member,
            "state_key": joinee.to_string(),
            "room_id": room_id,
            "sender": joinee.to_string(),
            "membership": Membership.JOIN,
            "content": content,
        })
        event, context = yield self._create_new_client_event(builder)

        yield self._do_join(event, context, room_hosts=hosts, do_auth=True)

        defer.returnValue({"room_id": room_id})

    @defer.inlineCallbacks
    def _do_join(self, event, context, room_hosts=None, do_auth=True):
        joinee = UserID.from_string(event.state_key)
        # room_id = RoomID.from_string(event.room_id, self.hs)
        room_id = event.room_id

        # XXX: We don't do an auth check if we are doing an invite
        # join dance for now, since we're kinda implicitly checking
        # that we are allowed to join when we decide whether or not we
        # need to do the invite/join dance.

        is_host_in_room = yield self.auth.check_host_in_room(
            event.room_id,
            self.hs.hostname
        )
        if not is_host_in_room:
            # is *anyone* in the room?
            room_member_keys = [
                v for (k, v) in context.current_state.keys() if (
                    k == "m.room.member"
                )
            ]
            if len(room_member_keys) == 0:
                # has the room been created so we can join it?
                create_event = context.current_state.get(("m.room.create", ""))
                if create_event:
                    is_host_in_room = True

        if is_host_in_room:
            should_do_dance = False
        elif room_hosts:  # TODO: Shouldn't this be remote_room_host?
            should_do_dance = True
        else:
            # TODO(markjh): get prev_state from snapshot
            prev_state = yield self.store.get_room_member(
                joinee.to_string(), room_id
            )

            if prev_state and prev_state.membership == Membership.INVITE:
                inviter = UserID.from_string(prev_state.user_id)

                should_do_dance = not self.hs.is_mine(inviter)
                room_hosts = [inviter.domain]
            else:
                # return the same error as join_room_alias does
                raise SynapseError(404, "No known servers")

        if should_do_dance:
            handler = self.hs.get_handlers().federation_handler
            yield handler.do_invite_join(
                room_hosts,
                room_id,
                event.user_id,
                event.content,  # FIXME To get a non-frozen dict
                context
            )
        else:
            logger.debug("Doing normal join")

            yield self._do_local_membership_update(
                event,
                membership=event.content["membership"],
                context=context,
                do_auth=do_auth,
            )

        user = UserID.from_string(event.user_id)
        yield self.distributor.fire(
            "user_joined_room", user=user, room_id=room_id
        )

    @defer.inlineCallbacks
    def _should_invite_join(self, room_id, prev_state, do_auth):
        logger.debug("_should_invite_join: room_id: %s", room_id)

        # XXX: We don't do an auth check if we are doing an invite
        # join dance for now, since we're kinda implicitly checking
        # that we are allowed to join when we decide whether or not we
        # need to do the invite/join dance.

        # Only do an invite join dance if a) we were invited,
        # b) the person inviting was from a differnt HS and c) we are
        # not currently in the room
        room_host = None
        if prev_state and prev_state.membership == Membership.INVITE:
            room = yield self.store.get_room(room_id)
            inviter = UserID.from_string(
                prev_state.sender
            )

            is_remote_invite_join = not self.hs.is_mine(inviter) and not room
            room_host = inviter.domain
        else:
            is_remote_invite_join = False

        defer.returnValue((is_remote_invite_join, room_host))

    @defer.inlineCallbacks
    def get_joined_rooms_for_user(self, user):
        """Returns a list of roomids that the user has any of the given
        membership states in."""

        app_service = yield self.store.get_app_service_by_user_id(
            user.to_string()
        )
        if app_service:
            rooms = yield self.store.get_app_service_rooms(app_service)
        else:
            rooms = yield self.store.get_rooms_for_user(
                user.to_string(),
            )

        # For some reason the list of events contains duplicates
        # TODO(paul): work out why because I really don't think it should
        room_ids = set(r.room_id for r in rooms)

        defer.returnValue(room_ids)

    @defer.inlineCallbacks
    def _do_local_membership_update(self, event, membership, context,
                                    do_auth):
        yield run_on_reactor()

        target_user = UserID.from_string(event.state_key)

        yield self.handle_new_client_event(
            event,
            context,
            extra_users=[target_user],
            suppress_auth=(not do_auth),
        )


class RoomListHandler(BaseHandler):

    @defer.inlineCallbacks
    def get_public_room_list(self):
        chunk = yield self.store.get_rooms(is_public=True)
        results = yield defer.gatherResults(
            [
                self.store.get_users_in_room(room["room_id"])
                for room in chunk
            ],
            consumeErrors=True,
        )

        for i, room in enumerate(chunk):
            room["num_joined_members"] = len(results[i])

        # FIXME (erikj): START is no longer a valid value
        defer.returnValue({"start": "START", "end": "END", "chunk": chunk})


class RoomEventSource(object):
    def __init__(self, hs):
        self.store = hs.get_datastore()

    @defer.inlineCallbacks
    def get_new_events_for_user(self, user, from_key, limit):
        # We just ignore the key for now.

        to_key = yield self.get_current_key()

        app_service = yield self.store.get_app_service_by_user_id(
            user.to_string()
        )
        if app_service:
            events, end_key = yield self.store.get_appservice_room_stream(
                service=app_service,
                from_key=from_key,
                to_key=to_key,
                limit=limit,
            )
        else:
            events, end_key = yield self.store.get_room_events_stream(
                user_id=user.to_string(),
                from_key=from_key,
                to_key=to_key,
                room_id=None,
                limit=limit,
            )

        defer.returnValue((events, end_key))

    def get_current_key(self):
        return self.store.get_room_events_max_id()

    @defer.inlineCallbacks
    def get_pagination_rows(self, user, config, key):
        events, next_key = yield self.store.paginate_room_events(
            room_id=key,
            from_key=config.from_key,
            to_key=config.to_key,
            direction=config.direction,
            limit=config.limit,
            with_feedback=True
        )

        defer.returnValue((events, next_key))