ruma_client_api/
filter.rs

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
//! Endpoints for event filters.

pub mod create_filter;
pub mod get_filter;

mod lazy_load;
mod url;

use js_int::UInt;
use ruma_common::{serde::StringEnum, OwnedRoomId, OwnedUserId};
use serde::{Deserialize, Serialize};

pub use self::{lazy_load::LazyLoadOptions, url::UrlFilter};
use crate::PrivOwnedStr;

/// Format to use for returned events.
#[doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/src/doc/string_enum.md"))]
#[derive(Clone, Default, PartialEq, Eq, StringEnum)]
#[ruma_enum(rename_all = "snake_case")]
#[non_exhaustive]
pub enum EventFormat {
    /// Client format, as described in the Client API.
    #[default]
    Client,

    /// Raw events from federation.
    Federation,

    #[doc(hidden)]
    _Custom(PrivOwnedStr),
}

/// Filters to be applied to room events.
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct RoomEventFilter {
    /// A list of event types to exclude.
    ///
    /// If this list is absent then no event types are excluded. A matching type will be excluded
    /// even if it is listed in the 'types' filter. A '*' can be used as a wildcard to match any
    /// sequence of characters.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_types: Vec<String>,

    /// A list of room IDs to exclude.
    ///
    /// If this list is absent then no rooms are excluded. A matching room will be excluded even if
    /// it is listed in the 'rooms' filter.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_rooms: Vec<OwnedRoomId>,

    /// The maximum number of events to return.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub limit: Option<UInt>,

    /// A list of room IDs to include.
    ///
    /// If this list is absent then all rooms are included.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub rooms: Option<Vec<OwnedRoomId>>,

    /// A list of sender IDs to exclude.
    ///
    /// If this list is absent then no senders are excluded. A matching sender will be excluded
    /// even if it is listed in the 'senders' filter.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_senders: Vec<OwnedUserId>,

    /// A list of senders IDs to include.
    ///
    /// If this list is absent then all senders are included.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub senders: Option<Vec<OwnedUserId>>,

    /// A list of event types to include.
    ///
    /// If this list is absent then all event types are included. A '*' can be used as a wildcard
    /// to match any sequence of characters.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub types: Option<Vec<String>>,

    /// Controls whether to include events with a URL key in their content.
    ///
    /// * `None`: No filtering
    /// * `Some(EventsWithUrl)`: Only events with a URL
    /// * `Some(EventsWithoutUrl)`: Only events without a URL
    #[serde(rename = "contains_url", skip_serializing_if = "Option::is_none")]
    pub url_filter: Option<UrlFilter>,

    /// Options to control lazy-loading of membership events.
    ///
    /// Defaults to `LazyLoadOptions::Disabled`.
    #[serde(flatten)]
    pub lazy_load_options: LazyLoadOptions,

    /// Whether to enable [per-thread notification counts].
    ///
    /// Only applies to the [`sync_events`] endpoint.
    ///
    /// [per-thread notification counts]: https://spec.matrix.org/latest/client-server-api/#receiving-notifications
    /// [`sync_events`]: crate::sync::sync_events
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
    pub unread_thread_notifications: bool,
}

impl RoomEventFilter {
    /// Creates an empty `RoomEventFilter`.
    ///
    /// You can also use the [`Default`] implementation.
    pub fn empty() -> Self {
        Self::default()
    }

    /// Creates a new `RoomEventFilter` that can be used to ignore all room events.
    pub fn ignore_all() -> Self {
        Self { types: Some(vec![]), ..Default::default() }
    }

    /// Creates a new `RoomEventFilter` with [room member lazy-loading] enabled.
    ///
    /// Redundant membership events are disabled.
    ///
    /// [room member lazy-loading]: https://spec.matrix.org/latest/client-server-api/#lazy-loading-room-members
    pub fn with_lazy_loading() -> Self {
        Self {
            lazy_load_options: LazyLoadOptions::Enabled { include_redundant_members: false },
            ..Default::default()
        }
    }

    /// Returns `true` if all fields are empty.
    pub fn is_empty(&self) -> bool {
        self.not_types.is_empty()
            && self.not_rooms.is_empty()
            && self.limit.is_none()
            && self.rooms.is_none()
            && self.not_senders.is_empty()
            && self.senders.is_none()
            && self.types.is_none()
            && self.url_filter.is_none()
            && self.lazy_load_options.is_disabled()
            && !self.unread_thread_notifications
    }
}

/// Filters to be applied to room data.
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct RoomFilter {
    /// Include rooms that the user has left in the sync.
    ///
    /// Defaults to `false`.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
    pub include_leave: bool,

    /// The per user account data to include for rooms.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub account_data: RoomEventFilter,

    /// The message and state update events to include for rooms.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub timeline: RoomEventFilter,

    /// The events that aren't recorded in the room history, e.g. typing and receipts, to include
    /// for rooms.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub ephemeral: RoomEventFilter,

    /// The state events to include for rooms.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub state: RoomEventFilter,

    /// A list of room IDs to exclude.
    ///
    /// If this list is absent then no rooms are excluded. A matching room will be excluded even if
    /// it is listed in the 'rooms' filter. This filter is applied before the filters in
    /// `ephemeral`, `state`, `timeline` or `account_data`.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_rooms: Vec<OwnedRoomId>,

    /// A list of room IDs to include.
    ///
    /// If this list is absent then all rooms are included. This filter is applied before the
    /// filters in `ephemeral`, `state`, `timeline` or `account_data`.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub rooms: Option<Vec<OwnedRoomId>>,
}

impl RoomFilter {
    /// Creates an empty `RoomFilter`.
    ///
    /// You can also use the [`Default`] implementation.
    pub fn empty() -> Self {
        Self::default()
    }

    /// Creates a new `RoomFilter` that can be used to ignore all room events (of any type).
    pub fn ignore_all() -> Self {
        Self { rooms: Some(vec![]), ..Default::default() }
    }

    /// Creates a new `RoomFilter` with [room member lazy-loading] enabled.
    ///
    /// Redundant membership events are disabled.
    ///
    /// [room member lazy-loading]: https://spec.matrix.org/latest/client-server-api/#lazy-loading-room-members
    pub fn with_lazy_loading() -> Self {
        Self { state: RoomEventFilter::with_lazy_loading(), ..Default::default() }
    }

    /// Returns `true` if all fields are empty.
    pub fn is_empty(&self) -> bool {
        !self.include_leave
            && self.account_data.is_empty()
            && self.timeline.is_empty()
            && self.ephemeral.is_empty()
            && self.state.is_empty()
            && self.not_rooms.is_empty()
            && self.rooms.is_none()
    }
}

/// Filter for non-room data.
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct Filter {
    /// A list of event types to exclude.
    ///
    /// If this list is absent then no event types are excluded. A matching type will be excluded
    /// even if it is listed in the 'types' filter. A '*' can be used as a wildcard to match any
    /// sequence of characters.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_types: Vec<String>,

    /// The maximum number of events to return.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub limit: Option<UInt>,

    /// A list of senders IDs to include.
    ///
    /// If this list is absent then all senders are included.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub senders: Option<Vec<OwnedUserId>>,

    /// A list of event types to include.
    ///
    /// If this list is absent then all event types are included. A '*' can be used as a wildcard
    /// to match any sequence of characters.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub types: Option<Vec<String>>,

    /// A list of sender IDs to exclude.
    ///
    /// If this list is absent then no senders are excluded. A matching sender will be excluded
    /// even if it is listed in the 'senders' filter.
    #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
    pub not_senders: Vec<OwnedUserId>,
}

impl Filter {
    /// Creates an empty `Filter`.
    ///
    /// You can also use the [`Default`] implementation.
    pub fn empty() -> Self {
        Self::default()
    }

    /// Creates a new `Filter` that can be used to ignore all events.
    pub fn ignore_all() -> Self {
        Self { types: Some(vec![]), ..Default::default() }
    }

    /// Returns `true` if all fields are empty.
    pub fn is_empty(&self) -> bool {
        self.not_types.is_empty()
            && self.limit.is_none()
            && self.senders.is_none()
            && self.types.is_none()
            && self.not_senders.is_empty()
    }
}

/// A filter definition
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct FilterDefinition {
    /// List of event fields to include.
    ///
    /// If this list is absent then all fields are included. The entries may include '.' characters
    /// to indicate sub-fields. So ['content.body'] will include the 'body' field of the 'content'
    /// object. A literal '.' or '\' character in a field name may be escaped using a '\'. A server
    /// may include more fields than were requested.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub event_fields: Option<Vec<String>>,

    /// The format to use for events.
    ///
    /// 'client' will return the events in a format suitable for clients. 'federation' will return
    /// the raw event as received over federation. The default is 'client'.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
    pub event_format: EventFormat,

    /// The presence updates to include.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub presence: Filter,

    /// The user account data that isn't associated with rooms to include.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub account_data: Filter,

    /// Filters to be applied to room data.
    #[serde(default, skip_serializing_if = "ruma_common::serde::is_empty")]
    pub room: RoomFilter,
}

impl FilterDefinition {
    /// Creates an empty `FilterDefinition`.
    ///
    /// You can also use the [`Default`] implementation.
    pub fn empty() -> Self {
        Self::default()
    }

    /// Creates a new `FilterDefinition` that can be used to ignore all events.
    pub fn ignore_all() -> Self {
        Self {
            account_data: Filter::ignore_all(),
            room: RoomFilter::ignore_all(),
            presence: Filter::ignore_all(),
            ..Default::default()
        }
    }

    /// Creates a new `FilterDefinition` with [room member lazy-loading] enabled.
    ///
    /// Redundant membership events are disabled.
    ///
    /// [room member lazy-loading]: https://spec.matrix.org/latest/client-server-api/#lazy-loading-room-members
    pub fn with_lazy_loading() -> Self {
        Self { room: RoomFilter::with_lazy_loading(), ..Default::default() }
    }

    /// Returns `true` if all fields are empty.
    pub fn is_empty(&self) -> bool {
        self.event_fields.is_none()
            && self.event_format == EventFormat::Client
            && self.presence.is_empty()
            && self.account_data.is_empty()
            && self.room.is_empty()
    }
}

macro_rules! can_be_empty {
    ($ty:ident) => {
        impl ruma_common::serde::CanBeEmpty for $ty {
            fn is_empty(&self) -> bool {
                self.is_empty()
            }
        }
    };
}

can_be_empty!(Filter);
can_be_empty!(FilterDefinition);
can_be_empty!(RoomEventFilter);
can_be_empty!(RoomFilter);

#[cfg(test)]
mod tests {
    use serde_json::{from_value as from_json_value, json, to_value as to_json_value};

    use super::{
        Filter, FilterDefinition, LazyLoadOptions, RoomEventFilter, RoomFilter, UrlFilter,
    };

    #[test]
    fn default_filters_are_empty() -> serde_json::Result<()> {
        assert_eq!(to_json_value(Filter::default())?, json!({}));
        assert_eq!(to_json_value(FilterDefinition::default())?, json!({}));
        assert_eq!(to_json_value(RoomEventFilter::default())?, json!({}));
        assert_eq!(to_json_value(RoomFilter::default())?, json!({}));

        Ok(())
    }

    #[test]
    fn filter_definition_roundtrip() -> serde_json::Result<()> {
        let filter = FilterDefinition::default();
        let filter_str = to_json_value(&filter)?;

        let incoming_filter = from_json_value::<FilterDefinition>(filter_str)?;
        assert!(incoming_filter.is_empty());

        Ok(())
    }

    #[test]
    fn room_filter_definition_roundtrip() -> serde_json::Result<()> {
        let filter = RoomFilter::default();
        let room_filter = to_json_value(filter)?;

        let incoming_room_filter = from_json_value::<RoomFilter>(room_filter)?;
        assert!(incoming_room_filter.is_empty());

        Ok(())
    }

    #[test]
    fn issue_366() {
        let obj = json!({
            "lazy_load_members": true,
            "filter_json": { "contains_url": true, "types": ["m.room.message"] },
            "types": ["m.room.message"],
            "not_types": [],
            "rooms": null,
            "not_rooms": [],
            "senders": null,
            "not_senders": [],
            "contains_url": true,
        });

        let filter: RoomEventFilter = from_json_value(obj).unwrap();

        assert_eq!(filter.types, Some(vec!["m.room.message".to_owned()]));
        assert_eq!(filter.not_types, vec![""; 0]);
        assert_eq!(filter.rooms, None);
        assert_eq!(filter.not_rooms, vec![""; 0]);
        assert_eq!(filter.senders, None);
        assert_eq!(filter.not_senders, vec![""; 0]);
        assert_eq!(filter.limit, None);
        assert_eq!(filter.url_filter, Some(UrlFilter::EventsWithUrl));
        assert_eq!(
            filter.lazy_load_options,
            LazyLoadOptions::Enabled { include_redundant_members: false }
        );
    }
}