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
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
use std::collections::BTreeMap;

use as_variant::as_variant;
use imbl::Vector;
use matrix_sdk_base::{sliding_sync::http, sync::SyncResponse, PreviousEventsProvider};
use ruma::{
    api::{
        client::discovery::{discover_homeserver, get_supported_versions},
        MatrixVersion,
    },
    events::AnyToDeviceEvent,
    serde::Raw,
    OwnedRoomId,
};
use tracing::error;
use url::Url;

use super::{SlidingSync, SlidingSyncBuilder};
use crate::{config::RequestConfig, http_client::HttpClient, Client, Result, SlidingSyncRoom};

/// A sliding sync version.
#[derive(Clone, Debug)]
pub enum Version {
    /// No version. Useful to represent that sliding sync is disabled for
    /// example, and that the version is unknown.
    None,

    /// Use the version of the sliding sync proxy, i.e. MSC3575.
    Proxy {
        /// URL to the proxy.
        url: Url,
    },

    /// Use the version of the sliding sync implementation inside Synapse, i.e.
    /// MSC4186.
    Native,
}

impl Version {
    pub(crate) fn is_native(&self) -> bool {
        matches!(self, Self::Native)
    }

    pub(crate) fn overriding_url(&self) -> Option<&Url> {
        as_variant!(self, Self::Proxy { url } => url)
    }
}

/// An error when building a version.
#[derive(thiserror::Error, Debug)]
pub enum VersionBuilderError {
    /// The `.well-known` response is not set.
    #[error("`.well-known` is not set")]
    WellKnownNotSet,

    /// `.well-known` does not contain a `sliding_sync_proxy` entry.
    #[error("`.well-known` does not contain a `sliding_sync_proxy` entry")]
    NoSlidingSyncInWellKnown,

    /// The `sliding_sync_proxy` URL in .well-known` is not valid ({0}).
    #[error("the `sliding_sync_proxy` URL in .well-known` is not valid ({0})")]
    UnparsableSlidingSyncUrl(url::ParseError),

    /// The `/versions` response is not set.
    #[error("The `/versions` response is not set")]
    MissingVersionsResponse,

    /// `/versions` does not contain `org.matrix.simplified_msc3575` in its
    /// `unstable_features`, or it's not set to true.
    #[error("`/versions` does not contain `org.matrix.simplified_msc3575` in its `unstable_features`, or it's not set to true.")]
    NativeVersionIsUnset,
}

/// A builder for [`Version`].
#[derive(Clone, Debug)]
pub enum VersionBuilder {
    /// Build a [`Version::None`].
    None,

    /// Build a [`Version::Proxy`].
    Proxy {
        /// Coerced URL to the proxy.
        url: Url,
    },

    /// Build a [`Version::Native`].
    Native,

    /// Build a [`Version::Proxy`] by auto-discovering it.
    ///
    /// It is available if the server enables it via `.well-known`.
    DiscoverProxy,

    /// Build a [`Version::Native`] by auto-discovering it.
    ///
    /// It is available if the server enables it via `/versions`.
    DiscoverNative,
}

impl VersionBuilder {
    pub(crate) fn needs_get_supported_versions(&self) -> bool {
        matches!(self, Self::DiscoverNative)
    }

    /// Build a [`Version`].
    ///
    /// It can fail if auto-discovering fails, e.g. if `.well-known`
    /// or `/versions` do contain invalid data.
    pub fn build(
        self,
        well_known: Option<&discover_homeserver::Response>,
        versions: Option<&get_supported_versions::Response>,
    ) -> Result<Version, VersionBuilderError> {
        Ok(match self {
            Self::None => Version::None,

            Self::Proxy { url } => Version::Proxy { url },

            Self::Native => Version::Native,

            Self::DiscoverProxy => {
                let Some(well_known) = well_known else {
                    return Err(VersionBuilderError::WellKnownNotSet);
                };

                let Some(info) = &well_known.sliding_sync_proxy else {
                    return Err(VersionBuilderError::NoSlidingSyncInWellKnown);
                };

                let url =
                    Url::parse(&info.url).map_err(VersionBuilderError::UnparsableSlidingSyncUrl)?;

                Version::Proxy { url }
            }

            Self::DiscoverNative => {
                let Some(versions) = versions else {
                    return Err(VersionBuilderError::MissingVersionsResponse);
                };

                match versions.unstable_features.get("org.matrix.simplified_msc3575") {
                    Some(value) if *value => Version::Native,
                    _ => return Err(VersionBuilderError::NativeVersionIsUnset),
                }
            }
        })
    }
}

impl Client {
    /// Find all sliding sync versions that are available.
    ///
    /// Be careful: This method may hit the store and will send new requests for
    /// each call. It can be costly to call it repeatedly.
    ///
    /// If `.well-known` or `/versions` is unreachable, it will simply move
    /// potential sliding sync versions aside. No error will be reported.
    pub async fn available_sliding_sync_versions(&self) -> Vec<Version> {
        async fn discover_homeserver(
            http_client: &HttpClient,
            server: Option<String>,
        ) -> Option<discover_homeserver::Response> {
            if let Some(server) = server {
                http_client
                    .send(
                        discover_homeserver::Request::new(),
                        Some(RequestConfig::short_retry()),
                        server,
                        None,
                        &[MatrixVersion::V1_0],
                        Default::default(),
                    )
                    .await
                    .ok()
            } else {
                None
            }
        }

        let http_client = &self.inner.http_client;

        // Discover the homeserver by using:
        //
        // * the server if any,
        // * by using the user ID's server name (if any) with `https://`,
        // * by using the user ID's server name (if any) with `http://`.
        //
        // Otherwise, `well_known` is `None`.
        let well_known = if let Some(well_known) =
            discover_homeserver(http_client, self.server().map(ToString::to_string)).await
        {
            Some(well_known)
        } else if let Some(well_known) = discover_homeserver(
            http_client,
            self.user_id().map(|user_id| format!("https://{}", user_id.server_name())),
        )
        .await
        {
            Some(well_known)
        } else {
            discover_homeserver(
                http_client,
                self.user_id().map(|user_id| format!("http://{}", user_id.server_name())),
            )
            .await
        };

        let supported_versions = self.unstable_features().await.ok().map(|unstable_features| {
            let mut response = get_supported_versions::Response::new(vec![]);
            response.unstable_features = unstable_features;

            response
        });

        [VersionBuilder::DiscoverNative, VersionBuilder::DiscoverProxy]
            .into_iter()
            .filter_map(|version_builder| {
                version_builder.build(well_known.as_ref(), supported_versions.as_ref()).ok()
            })
            .collect()
    }

    /// Create a [`SlidingSyncBuilder`] tied to this client, with the given
    /// identifier.
    ///
    /// Note: the identifier must not be more than 16 chars long!
    pub fn sliding_sync(&self, id: impl Into<String>) -> Result<SlidingSyncBuilder> {
        Ok(SlidingSync::builder(id.into(), self.clone())?)
    }

    /// Handle all the information provided in a sliding sync response, except
    /// for the e2ee bits.
    ///
    /// If you need to handle encryption too, use the internal
    /// `SlidingSyncResponseProcessor` instead.
    #[cfg(any(test, feature = "testing"))]
    #[tracing::instrument(skip(self, response))]
    pub async fn process_sliding_sync_test_helper(
        &self,
        response: &http::Response,
    ) -> Result<SyncResponse> {
        let response = self
            .base_client()
            .process_sliding_sync(response, &(), self.sliding_sync_version().is_native())
            .await?;

        tracing::debug!("done processing on base_client");
        self.call_sync_response_handlers(&response).await?;

        Ok(response)
    }
}

struct SlidingSyncPreviousEventsProvider<'a>(&'a BTreeMap<OwnedRoomId, SlidingSyncRoom>);

impl<'a> PreviousEventsProvider for SlidingSyncPreviousEventsProvider<'a> {
    fn for_room(
        &self,
        room_id: &ruma::RoomId,
    ) -> Vector<matrix_sdk_common::deserialized_responses::SyncTimelineEvent> {
        self.0.get(room_id).map(|room| room.timeline_queue()).unwrap_or_default()
    }
}

/// Small helper to handle a `SlidingSync` response's sub parts.
///
/// This will properly handle the encryption and the room response
/// independently, if needs be, making sure that both are properly processed by
/// event handlers.
#[must_use]
pub(crate) struct SlidingSyncResponseProcessor<'a> {
    client: Client,
    to_device_events: Vec<Raw<AnyToDeviceEvent>>,
    response: Option<SyncResponse>,
    rooms: &'a BTreeMap<OwnedRoomId, SlidingSyncRoom>,
}

impl<'a> SlidingSyncResponseProcessor<'a> {
    pub fn new(client: Client, rooms: &'a BTreeMap<OwnedRoomId, SlidingSyncRoom>) -> Self {
        Self { client, to_device_events: Vec::new(), response: None, rooms }
    }

    #[cfg(feature = "e2e-encryption")]
    pub async fn handle_encryption(
        &mut self,
        extensions: &http::response::Extensions,
    ) -> Result<()> {
        // This is an internal API misuse if this is triggered (calling
        // `handle_room_response` before this function), so panic is fine.
        assert!(self.response.is_none());

        self.to_device_events = if let Some(to_device_events) = self
            .client
            .base_client()
            .process_sliding_sync_e2ee(extensions.to_device.as_ref(), &extensions.e2ee)
            .await?
        {
            // Some new keys might have been received, so trigger a backup if needed.
            self.client.encryption().backups().maybe_trigger_backup();

            to_device_events
        } else {
            Vec::new()
        };

        Ok(())
    }

    pub async fn handle_room_response(
        &mut self,
        response: &http::Response,
        with_msc4186: bool,
    ) -> Result<()> {
        self.response = Some(
            self.client
                .base_client()
                .process_sliding_sync(
                    response,
                    &SlidingSyncPreviousEventsProvider(self.rooms),
                    with_msc4186,
                )
                .await?,
        );
        self.post_process().await
    }

    async fn post_process(&mut self) -> Result<()> {
        // This is an internal API misuse if this is triggered (calling
        // `handle_room_response` after this function), so panic is fine.
        let response = self.response.as_ref().unwrap();

        update_in_memory_caches(&self.client, response).await?;

        Ok(())
    }

    pub async fn process_and_take_response(mut self) -> Result<SyncResponse> {
        let mut response = self.response.take().unwrap_or_default();

        response.to_device.extend(self.to_device_events);

        self.client.call_sync_response_handlers(&response).await?;

        Ok(response)
    }
}

/// Update the caches for the rooms that received updates.
///
/// This will only fill the in-memory caches, not save the info on disk.
async fn update_in_memory_caches(client: &Client, response: &SyncResponse) -> Result<()> {
    for room_id in response.rooms.join.keys() {
        let Some(room) = client.get_room(room_id) else {
            error!(room_id = ?room_id, "Cannot post process a room in sliding sync because it is missing");
            continue;
        };

        room.user_defined_notification_mode().await;
    }

    Ok(())
}

#[cfg(test)]
mod tests {
    use std::collections::BTreeMap;

    use assert_matches::assert_matches;
    use matrix_sdk_base::{notification_settings::RoomNotificationMode, SessionMeta};
    use matrix_sdk_test::async_test;
    use ruma::{
        api::MatrixVersion, assign, owned_device_id, room_id, serde::Raw, OwnedUserId, ServerName,
    };
    use serde_json::json;
    use url::Url;
    use wiremock::{
        matchers::{method, path},
        Mock, MockServer, ResponseTemplate,
    };

    use super::{discover_homeserver, get_supported_versions, Version, VersionBuilder};
    use crate::{
        error::Result,
        matrix_auth::{MatrixSession, MatrixSessionTokens},
        sliding_sync::{http, VersionBuilderError},
        test_utils::logged_in_client_with_server,
        Client, SlidingSyncList, SlidingSyncMode,
    };

    #[test]
    fn test_version_builder_none() {
        assert_matches!(VersionBuilder::None.build(None, None), Ok(Version::None));
    }

    #[test]
    fn test_version_builder_proxy() {
        let expected_url = Url::parse("https://matrix.org:1234").unwrap();

        assert_matches!(
            VersionBuilder::Proxy { url: expected_url.clone() }.build(None, None),
            Ok(Version::Proxy { url }) => {
                assert_eq!(url, expected_url);
            }
        );
    }

    #[test]
    fn test_version_builder_native() {
        assert_matches!(VersionBuilder::Native.build(None, None), Ok(Version::Native));
    }

    #[test]
    fn test_version_builder_discover_proxy() {
        let expected_url = Url::parse("https://matrix.org:1234").unwrap();
        let mut response = discover_homeserver::Response::new(
            discover_homeserver::HomeserverInfo::new("matrix.org".to_owned()),
        );
        response.sliding_sync_proxy =
            Some(discover_homeserver::SlidingSyncProxyInfo::new(expected_url.to_string()));

        assert_matches!(
            VersionBuilder::DiscoverProxy.build(Some(&response), None),
            Ok(Version::Proxy { url }) => {
                assert_eq!(url, expected_url);
            }
        );
    }

    #[test]
    fn test_version_builder_discover_proxy_no_well_known() {
        assert_matches!(
            VersionBuilder::DiscoverProxy.build(None, None),
            Err(VersionBuilderError::WellKnownNotSet)
        );
    }

    #[test]
    fn test_version_builder_discover_proxy_no_sliding_sync_proxy_in_well_known() {
        let mut response = discover_homeserver::Response::new(
            discover_homeserver::HomeserverInfo::new("matrix-client.matrix.org".to_owned()),
        );
        response.sliding_sync_proxy = None; // already `None` but the test is clearer now.

        assert_matches!(
            VersionBuilder::DiscoverProxy.build(Some(&response), None),
            Err(VersionBuilderError::NoSlidingSyncInWellKnown)
        );
    }

    #[test]
    fn test_version_builder_discover_proxy_invalid_sliding_sync_proxy_in_well_known() {
        let mut response = discover_homeserver::Response::new(
            discover_homeserver::HomeserverInfo::new("matrix-client.matrix.org".to_owned()),
        );
        response.sliding_sync_proxy =
            Some(discover_homeserver::SlidingSyncProxyInfo::new("💥".to_owned()));

        assert_matches!(
            VersionBuilder::DiscoverProxy.build(Some(&response), None),
            Err(VersionBuilderError::UnparsableSlidingSyncUrl(err)) => {
                assert_eq!(err.to_string(), "relative URL without a base");
            }
        );
    }

    #[test]
    fn test_version_builder_discover_native() {
        let mut response = get_supported_versions::Response::new(vec![]);
        response.unstable_features = [("org.matrix.simplified_msc3575".to_owned(), true)].into();

        assert_matches!(
            VersionBuilder::DiscoverNative.build(None, Some(&response)),
            Ok(Version::Native)
        );
    }

    #[test]
    fn test_version_builder_discover_native_no_supported_versions() {
        assert_matches!(
            VersionBuilder::DiscoverNative.build(None, None),
            Err(VersionBuilderError::MissingVersionsResponse)
        );
    }

    #[test]
    fn test_version_builder_discover_native_unstable_features_is_disabled() {
        let mut response = get_supported_versions::Response::new(vec![]);
        response.unstable_features = [("org.matrix.simplified_msc3575".to_owned(), false)].into();

        assert_matches!(
            VersionBuilder::DiscoverNative.build(None, Some(&response)),
            Err(VersionBuilderError::NativeVersionIsUnset)
        );
    }

    #[async_test]
    async fn test_available_sliding_sync_versions_none() {
        let (client, _server) = logged_in_client_with_server().await;
        let available_versions = client.available_sliding_sync_versions().await;

        // `.well-known` and `/versions` aren't available. It's impossible to find any
        // versions.
        assert!(available_versions.is_empty());
    }

    #[async_test]
    async fn test_available_sliding_sync_versions_proxy_with_server() {
        let server = MockServer::start().await;
        let homeserver = format!("https://{}/homeserver", server.address());
        let proxy = format!("https://{}/sliding-sync-proxy", server.address());

        Mock::given(method("GET"))
            .and(path("/.well-known/matrix/client"))
            .respond_with(ResponseTemplate::new(200).set_body_json(json!({
                "m.homeserver": {
                    "base_url": homeserver,
                },
                "org.matrix.msc3575.proxy": {
                    "url": proxy,
                },
            })))
            .mount(&server)
            .await;

        // The server knows the server.
        let client = Client::builder()
            .insecure_server_name_no_tls(
                <&ServerName>::try_from(server.address().to_string().as_str()).unwrap(),
            )
            .server_versions([MatrixVersion::V1_0])
            .build()
            .await
            .unwrap();

        let available_versions = client.available_sliding_sync_versions().await;

        // `.well-known` is available.
        assert_eq!(available_versions.len(), 1);
        assert_matches!(
            &available_versions[0],
            Version::Proxy { url } => {
                assert_eq!(url, &Url::parse(&proxy).unwrap());
            }
        );
    }

    #[async_test]
    async fn test_available_sliding_sync_versions_proxy_with_user_id() {
        let server = MockServer::start().await;
        let homeserver = format!("https://{}/homeserver", server.address());
        let proxy = format!("https://{}/sliding-sync-proxy", server.address());

        Mock::given(method("GET"))
            .and(path("/.well-known/matrix/client"))
            .respond_with(ResponseTemplate::new(200).set_body_json(json!({
                "m.homeserver": {
                    "base_url": homeserver,
                },
                "org.matrix.msc3575.proxy": {
                    "url": proxy,
                },
            })))
            .mount(&server)
            .await;

        // The client doesn't know the server.
        let client = Client::builder()
            .homeserver_url(homeserver)
            .server_versions([MatrixVersion::V1_0])
            .build()
            .await
            .unwrap();

        // The client knows a user.
        client
            .matrix_auth()
            .restore_session(MatrixSession {
                meta: SessionMeta {
                    user_id: OwnedUserId::try_from(format!("@alice:{}", server.address())).unwrap(),
                    device_id: owned_device_id!("DEVICEID"),
                },
                tokens: MatrixSessionTokens {
                    access_token: "1234".to_owned(),
                    refresh_token: None,
                },
            })
            .await
            .unwrap();

        let available_versions = client.available_sliding_sync_versions().await;

        // `.well-known` is available.
        assert_eq!(available_versions.len(), 1);
        assert_matches!(
            &available_versions[0],
            Version::Proxy { url } => {
                assert_eq!(url, &Url::parse(&proxy).unwrap());
            }
        );
    }

    #[async_test]
    async fn test_available_sliding_sync_versions_native() {
        let (client, server) = logged_in_client_with_server().await;

        Mock::given(method("GET"))
            .and(path("/_matrix/client/versions"))
            .respond_with(ResponseTemplate::new(200).set_body_json(json!({
                "versions": [],
                "unstable_features": {
                    "org.matrix.simplified_msc3575": true,
                },
            })))
            .mount(&server)
            .await;

        let available_versions = client.available_sliding_sync_versions().await;

        // `/versions` is available.
        assert_eq!(available_versions.len(), 1);
        assert_matches!(available_versions[0], Version::Native);
    }

    #[async_test]
    async fn test_cache_user_defined_notification_mode() -> Result<()> {
        let (client, _server) = logged_in_client_with_server().await;
        let room_id = room_id!("!r0:matrix.org");

        let sliding_sync = client
            .sliding_sync("test")?
            .with_account_data_extension(
                assign!(http::request::AccountData::default(), { enabled: Some(true) }),
            )
            .add_list(
                SlidingSyncList::builder("all")
                    .sync_mode(SlidingSyncMode::new_selective().add_range(0..=10)),
            )
            .build()
            .await?;

        // Mock a sync response.
        // A `m.push_rules` with `room` is cached during the sync.
        {
            let server_response = assign!(http::Response::new("0".to_owned()), {
                rooms: BTreeMap::from([(
                    room_id.to_owned(),
                    http::response::Room::default(),
                )]),
                extensions: assign!(http::response::Extensions::default(), {
                    account_data: assign!(http::response::AccountData::default(), {
                        global: vec![
                            Raw::from_json_string(
                                json!({
                                    "type": "m.push_rules",
                                    "content": {
                                        "global": {
                                            "room": [
                                                {
                                                    "actions": ["notify"],
                                                    "rule_id": room_id,
                                                    "default": false,
                                                    "enabled": true,
                                                },
                                            ],
                                        },
                                    },
                                })
                                .to_string(),
                            ).unwrap()
                        ]
                    })
                })
            });

            let mut pos_guard = sliding_sync.inner.position.clone().lock_owned().await;
            sliding_sync.handle_response(server_response.clone(), &mut pos_guard).await?;
        }

        // The room must exist, since it's been synced.
        let room = client.get_room(room_id).unwrap();

        // The room has a cached user-defined notification mode.
        assert_eq!(
            room.cached_user_defined_notification_mode(),
            Some(RoomNotificationMode::AllMessages),
        );

        // Mock a sync response.
        // A `m.push_rules` with `room` is cached during the sync.
        // It overwrites the previous cache.
        {
            let server_response = assign!(http::Response::new("0".to_owned()), {
                rooms: BTreeMap::from([(
                    room_id.to_owned(),
                    http::response::Room::default(),
                )]),
                extensions: assign!(http::response::Extensions::default(), {
                    account_data: assign!(http::response::AccountData::default(), {
                        global: vec![
                            Raw::from_json_string(
                                json!({
                                    "type": "m.push_rules",
                                    "content": {
                                        "global": {
                                            "room": [
                                                {
                                                    "actions": [],
                                                    "rule_id": room_id,
                                                    "default": false,
                                                    "enabled": true,
                                                },
                                            ],
                                        },
                                    },
                                })
                                .to_string(),
                            ).unwrap()
                        ]
                    })
                })
            });

            let mut pos_guard = sliding_sync.inner.position.clone().lock_owned().await;
            sliding_sync.handle_response(server_response.clone(), &mut pos_guard).await?;
        }

        // The room has an updated cached user-defined notification mode.
        assert_eq!(
            room.cached_user_defined_notification_mode(),
            Some(RoomNotificationMode::MentionsAndKeywordsOnly),
        );

        Ok(())
    }
}