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
//! Common types for room directory endpoints.

use js_int::UInt;
use serde::{Deserialize, Serialize};

mod filter_room_type_serde;
mod room_network_serde;

use crate::{
    room::RoomType, serde::StringEnum, OwnedMxcUri, OwnedRoomAliasId, OwnedRoomId, PrivOwnedStr,
};

/// A chunk of a room list response, describing one room.
///
/// To create an instance of this type, first create a `PublicRoomsChunkInit` and convert it via
/// `PublicRoomsChunk::from` / `.into()`.
#[derive(Clone, Debug, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct PublicRoomsChunk {
    /// The canonical alias of the room, if any.
    #[serde(skip_serializing_if = "Option::is_none")]
    #[cfg_attr(
        feature = "compat-empty-string-null",
        serde(default, deserialize_with = "crate::serde::empty_string_as_none")
    )]
    pub canonical_alias: Option<OwnedRoomAliasId>,

    /// The name of the room, if any.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub name: Option<String>,

    /// The number of members joined to the room.
    pub num_joined_members: UInt,

    /// The ID of the room.
    pub room_id: OwnedRoomId,

    /// The topic of the room, if any.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub topic: Option<String>,

    /// Whether the room may be viewed by guest users without joining.
    pub world_readable: bool,

    /// Whether guest users may join the room and participate in it.
    ///
    /// If they can, they will be subject to ordinary power level rules like any other user.
    pub guest_can_join: bool,

    /// The URL for the room's avatar, if one is set.
    ///
    /// If you activate the `compat-empty-string-null` feature, this field being an empty string in
    /// JSON will result in `None` here during deserialization.
    #[serde(skip_serializing_if = "Option::is_none")]
    #[cfg_attr(
        feature = "compat-empty-string-null",
        serde(default, deserialize_with = "crate::serde::empty_string_as_none")
    )]
    pub avatar_url: Option<OwnedMxcUri>,

    /// The join rule of the room.
    #[serde(default, skip_serializing_if = "crate::serde::is_default")]
    pub join_rule: PublicRoomJoinRule,

    /// The type of room from `m.room.create`, if any.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub room_type: Option<RoomType>,
}

/// Initial set of mandatory fields of `PublicRoomsChunk`.
///
/// This struct will not be updated even if additional fields are added to `PublicRoomsChunk` in a
/// new (non-breaking) release of the Matrix specification.
#[derive(Debug)]
#[allow(clippy::exhaustive_structs)]
pub struct PublicRoomsChunkInit {
    /// The number of members joined to the room.
    pub num_joined_members: UInt,

    /// The ID of the room.
    pub room_id: OwnedRoomId,

    /// Whether the room may be viewed by guest users without joining.
    pub world_readable: bool,

    /// Whether guest users may join the room and participate in it.
    ///
    /// If they can, they will be subject to ordinary power level rules like any other user.
    pub guest_can_join: bool,
}

impl From<PublicRoomsChunkInit> for PublicRoomsChunk {
    fn from(init: PublicRoomsChunkInit) -> Self {
        let PublicRoomsChunkInit { num_joined_members, room_id, world_readable, guest_can_join } =
            init;

        Self {
            canonical_alias: None,
            name: None,
            num_joined_members,
            room_id,
            topic: None,
            world_readable,
            guest_can_join,
            avatar_url: None,
            join_rule: PublicRoomJoinRule::default(),
            room_type: None,
        }
    }
}

/// A filter for public rooms lists.
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct Filter {
    /// A string to search for in the room metadata, e.g. name, topic, canonical alias etc.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub generic_search_term: Option<String>,

    /// The room types to include in the results.
    ///
    /// Includes all room types if it is empty.
    ///
    /// If the `compat-null` feature is enabled, a `null` value is allowed in deserialization, and
    /// treated the same way as an empty list.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    #[cfg_attr(feature = "compat-null", serde(deserialize_with = "crate::serde::none_as_default"))]
    pub room_types: Vec<RoomTypeFilter>,
}

impl Filter {
    /// Creates an empty `Filter`.
    pub fn new() -> Self {
        Default::default()
    }

    /// Returns `true` if the filter is empty.
    pub fn is_empty(&self) -> bool {
        self.generic_search_term.is_none()
    }
}

/// Information about which networks/protocols from application services on the
/// homeserver from which to request rooms.
#[derive(Clone, Debug, Default, PartialEq, Eq)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub enum RoomNetwork {
    /// Return rooms from the Matrix network.
    #[default]
    Matrix,

    /// Return rooms from all the networks/protocols the homeserver knows about.
    All,

    /// Return rooms from a specific third party network/protocol.
    ThirdParty(String),
}

/// The rule used for users wishing to join a public room.
#[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")]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub enum PublicRoomJoinRule {
    /// Users can request an invite to the room.
    Knock,

    /// Anyone can join the room without any prior action.
    #[default]
    Public,

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

/// An enum of possible room types to filter.
///
/// This type can hold an arbitrary string. To build this with a custom value, convert it from an
/// `Option<string>` with `::from()` / `.into()`. [`RoomTypeFilter::Default`] can be constructed
/// from `None`.
///
/// To check for values that are not available as a documented variant here, use its string
/// representation, obtained through [`.as_str()`](Self::as_str()).
#[derive(Clone, Debug, PartialEq, Eq)]
#[non_exhaustive]
pub enum RoomTypeFilter {
    /// The default room type, defined without a `room_type`.
    Default,

    /// A space.
    Space,

    /// A custom room type.
    #[doc(hidden)]
    _Custom(PrivOwnedStr),
}

impl RoomTypeFilter {
    /// Get the string representation of this `RoomTypeFilter`.
    ///
    /// [`RoomTypeFilter::Default`] returns `None`.
    pub fn as_str(&self) -> Option<&str> {
        match self {
            RoomTypeFilter::Default => None,
            RoomTypeFilter::Space => Some("m.space"),
            RoomTypeFilter::_Custom(s) => Some(&s.0),
        }
    }
}

impl<T> From<Option<T>> for RoomTypeFilter
where
    T: AsRef<str> + Into<Box<str>>,
{
    fn from(s: Option<T>) -> Self {
        match s {
            None => Self::Default,
            Some(s) => match s.as_ref() {
                "m.space" => Self::Space,
                _ => Self::_Custom(PrivOwnedStr(s.into())),
            },
        }
    }
}

impl From<Option<RoomType>> for RoomTypeFilter {
    fn from(t: Option<RoomType>) -> Self {
        match t {
            None => Self::Default,
            Some(s) => match s {
                RoomType::Space => Self::Space,
                _ => Self::from(Some(s.as_str())),
            },
        }
    }
}

#[cfg(test)]
mod tests {
    use assert_matches2::assert_matches;
    use serde_json::{from_value as from_json_value, json, to_value as to_json_value};

    use super::{Filter, RoomNetwork, RoomTypeFilter};
    use crate::room::RoomType;

    #[test]
    fn test_from_room_type() {
        let test = RoomType::Space;
        let other: RoomTypeFilter = RoomTypeFilter::from(Some(test));
        assert_eq!(other, RoomTypeFilter::Space);
    }

    #[test]
    fn serialize_matrix_network_only() {
        let json = json!({});
        assert_eq!(to_json_value(RoomNetwork::Matrix).unwrap(), json);
    }

    #[test]
    fn deserialize_matrix_network_only() {
        let json = json!({ "include_all_networks": false });
        assert_eq!(from_json_value::<RoomNetwork>(json).unwrap(), RoomNetwork::Matrix);
    }

    #[test]
    fn serialize_default_network_is_empty() {
        let json = json!({});
        assert_eq!(to_json_value(RoomNetwork::default()).unwrap(), json);
    }

    #[test]
    fn deserialize_empty_network_is_default() {
        let json = json!({});
        assert_eq!(from_json_value::<RoomNetwork>(json).unwrap(), RoomNetwork::Matrix);
    }

    #[test]
    fn serialize_include_all_networks() {
        let json = json!({ "include_all_networks": true });
        assert_eq!(to_json_value(RoomNetwork::All).unwrap(), json);
    }

    #[test]
    fn deserialize_include_all_networks() {
        let json = json!({ "include_all_networks": true });
        assert_eq!(from_json_value::<RoomNetwork>(json).unwrap(), RoomNetwork::All);
    }

    #[test]
    fn serialize_third_party_network() {
        let json = json!({ "third_party_instance_id": "freenode" });
        assert_eq!(to_json_value(RoomNetwork::ThirdParty("freenode".to_owned())).unwrap(), json);
    }

    #[test]
    fn deserialize_third_party_network() {
        let json = json!({ "third_party_instance_id": "freenode" });
        assert_eq!(
            from_json_value::<RoomNetwork>(json).unwrap(),
            RoomNetwork::ThirdParty("freenode".into())
        );
    }

    #[test]
    fn deserialize_include_all_networks_and_third_party_exclusivity() {
        let json = json!({ "include_all_networks": true, "third_party_instance_id": "freenode" });
        assert_eq!(
            from_json_value::<RoomNetwork>(json).unwrap_err().to_string().as_str(),
            "`include_all_networks = true` and `third_party_instance_id` are mutually exclusive."
        );
    }

    #[test]
    fn serialize_filter_empty() {
        let filter = Filter::default();
        let json = json!({});
        assert_eq!(to_json_value(filter).unwrap(), json);
    }

    #[test]
    fn deserialize_filter_empty() {
        let json = json!({});
        let filter = from_json_value::<Filter>(json).unwrap();
        assert_eq!(filter.generic_search_term, None);
        assert_eq!(filter.room_types.len(), 0);
    }

    #[test]
    fn serialize_filter_room_types() {
        let filter = Filter {
            generic_search_term: None,
            room_types: vec![
                RoomTypeFilter::Default,
                RoomTypeFilter::Space,
                Some("custom_type").into(),
            ],
        };
        let json = json!({ "room_types": [null, "m.space", "custom_type"] });
        assert_eq!(to_json_value(filter).unwrap(), json);
    }

    #[test]
    fn deserialize_filter_room_types() {
        let json = json!({ "room_types": [null, "m.space", "custom_type"] });
        let filter = from_json_value::<Filter>(json).unwrap();
        assert_eq!(filter.room_types.len(), 3);
        assert_eq!(filter.room_types[0], RoomTypeFilter::Default);
        assert_eq!(filter.room_types[1], RoomTypeFilter::Space);
        assert_matches!(&filter.room_types[2], RoomTypeFilter::_Custom(_));
        assert_eq!(filter.room_types[2].as_str(), Some("custom_type"));
    }
}