1use crate::{Channel, ChannelStore};
2use anyhow::{Context as _, Result};
3use client::{
4 ChannelId, Client, Subscription, TypedEnvelope, UserId, proto,
5 user::{User, UserStore},
6};
7use collections::HashSet;
8use futures::lock::Mutex;
9use gpui::{App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Task, WeakEntity};
10use rand::prelude::*;
11use rpc::AnyProtoClient;
12use std::{
13 ops::{ControlFlow, Range},
14 sync::Arc,
15};
16use sum_tree::{Bias, Dimensions, SumTree};
17use time::OffsetDateTime;
18use util::{ResultExt as _, TryFutureExt, post_inc};
19
20pub struct ChannelChat {
21 pub channel_id: ChannelId,
22 messages: SumTree<ChannelMessage>,
23 acknowledged_message_ids: HashSet<u64>,
24 channel_store: Entity<ChannelStore>,
25 loaded_all_messages: bool,
26 last_acknowledged_id: Option<u64>,
27 next_pending_message_id: usize,
28 first_loaded_message_id: Option<u64>,
29 user_store: Entity<UserStore>,
30 rpc: Arc<Client>,
31 outgoing_messages_lock: Arc<Mutex<()>>,
32 rng: StdRng,
33 _subscription: Subscription,
34}
35
36#[derive(Debug, PartialEq, Eq)]
37pub struct MessageParams {
38 pub text: String,
39 pub mentions: Vec<(Range<usize>, UserId)>,
40 pub reply_to_message_id: Option<u64>,
41}
42
43#[derive(Clone, Debug)]
44pub struct ChannelMessage {
45 pub id: ChannelMessageId,
46 pub body: String,
47 pub timestamp: OffsetDateTime,
48 pub sender: Arc<User>,
49 pub nonce: u128,
50 pub mentions: Vec<(Range<usize>, UserId)>,
51 pub reply_to_message_id: Option<u64>,
52 pub edited_at: Option<OffsetDateTime>,
53}
54
55#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
56pub enum ChannelMessageId {
57 Saved(u64),
58 Pending(usize),
59}
60
61impl From<ChannelMessageId> for Option<u64> {
62 fn from(val: ChannelMessageId) -> Self {
63 match val {
64 ChannelMessageId::Saved(id) => Some(id),
65 ChannelMessageId::Pending(_) => None,
66 }
67 }
68}
69
70#[derive(Clone, Debug, Default)]
71pub struct ChannelMessageSummary {
72 max_id: ChannelMessageId,
73 count: usize,
74}
75
76#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
77struct Count(usize);
78
79#[derive(Clone, Debug, PartialEq)]
80pub enum ChannelChatEvent {
81 MessagesUpdated {
82 old_range: Range<usize>,
83 new_count: usize,
84 },
85 UpdateMessage {
86 message_id: ChannelMessageId,
87 message_ix: usize,
88 },
89 NewMessage {
90 channel_id: ChannelId,
91 message_id: u64,
92 },
93}
94
95impl EventEmitter<ChannelChatEvent> for ChannelChat {}
96pub fn init(client: &AnyProtoClient) {
97 client.add_entity_message_handler(ChannelChat::handle_message_sent);
98 client.add_entity_message_handler(ChannelChat::handle_message_removed);
99 client.add_entity_message_handler(ChannelChat::handle_message_updated);
100}
101
102impl ChannelChat {
103 pub async fn new(
104 channel: Arc<Channel>,
105 channel_store: Entity<ChannelStore>,
106 user_store: Entity<UserStore>,
107 client: Arc<Client>,
108 cx: &mut AsyncApp,
109 ) -> Result<Entity<Self>> {
110 let channel_id = channel.id;
111 let subscription = client.subscribe_to_entity(channel_id.0).unwrap();
112
113 let response = client
114 .request(proto::JoinChannelChat {
115 channel_id: channel_id.0,
116 })
117 .await?;
118
119 let handle = cx.new(|cx| {
120 cx.on_release(Self::release).detach();
121 Self {
122 channel_id: channel.id,
123 user_store: user_store.clone(),
124 channel_store,
125 rpc: client.clone(),
126 outgoing_messages_lock: Default::default(),
127 messages: Default::default(),
128 acknowledged_message_ids: Default::default(),
129 loaded_all_messages: false,
130 next_pending_message_id: 0,
131 last_acknowledged_id: None,
132 rng: StdRng::from_entropy(),
133 first_loaded_message_id: None,
134 _subscription: subscription.set_entity(&cx.entity(), &cx.to_async()),
135 }
136 })?;
137 Self::handle_loaded_messages(
138 handle.downgrade(),
139 user_store,
140 client,
141 response.messages,
142 response.done,
143 cx,
144 )
145 .await?;
146 Ok(handle)
147 }
148
149 fn release(&mut self, _: &mut App) {
150 self.rpc
151 .send(proto::LeaveChannelChat {
152 channel_id: self.channel_id.0,
153 })
154 .log_err();
155 }
156
157 pub fn channel(&self, cx: &App) -> Option<Arc<Channel>> {
158 self.channel_store
159 .read(cx)
160 .channel_for_id(self.channel_id)
161 .cloned()
162 }
163
164 pub fn client(&self) -> &Arc<Client> {
165 &self.rpc
166 }
167
168 pub fn send_message(
169 &mut self,
170 message: MessageParams,
171 cx: &mut Context<Self>,
172 ) -> Result<Task<Result<u64>>> {
173 anyhow::ensure!(
174 !message.text.trim().is_empty(),
175 "message body can't be empty"
176 );
177
178 let current_user = self
179 .user_store
180 .read(cx)
181 .current_user()
182 .context("current_user is not present")?;
183
184 let channel_id = self.channel_id;
185 let pending_id = ChannelMessageId::Pending(post_inc(&mut self.next_pending_message_id));
186 let nonce = self.rng.r#gen();
187 self.insert_messages(
188 SumTree::from_item(
189 ChannelMessage {
190 id: pending_id,
191 body: message.text.clone(),
192 sender: current_user,
193 timestamp: OffsetDateTime::now_utc(),
194 mentions: message.mentions.clone(),
195 nonce,
196 reply_to_message_id: message.reply_to_message_id,
197 edited_at: None,
198 },
199 &(),
200 ),
201 cx,
202 );
203 let user_store = self.user_store.clone();
204 let rpc = self.rpc.clone();
205 let outgoing_messages_lock = self.outgoing_messages_lock.clone();
206
207 // todo - handle messages that fail to send (e.g. >1024 chars)
208 Ok(cx.spawn(async move |this, cx| {
209 let outgoing_message_guard = outgoing_messages_lock.lock().await;
210 let request = rpc.request(proto::SendChannelMessage {
211 channel_id: channel_id.0,
212 body: message.text,
213 nonce: Some(nonce.into()),
214 mentions: mentions_to_proto(&message.mentions),
215 reply_to_message_id: message.reply_to_message_id,
216 });
217 let response = request.await?;
218 drop(outgoing_message_guard);
219 let response = response.message.context("invalid message")?;
220 let id = response.id;
221 let message = ChannelMessage::from_proto(response, &user_store, cx).await?;
222 this.update(cx, |this, cx| {
223 this.insert_messages(SumTree::from_item(message, &()), cx);
224 if this.first_loaded_message_id.is_none() {
225 this.first_loaded_message_id = Some(id);
226 }
227 })?;
228 Ok(id)
229 }))
230 }
231
232 pub fn remove_message(&mut self, id: u64, cx: &mut Context<Self>) -> Task<Result<()>> {
233 let response = self.rpc.request(proto::RemoveChannelMessage {
234 channel_id: self.channel_id.0,
235 message_id: id,
236 });
237 cx.spawn(async move |this, cx| {
238 response.await?;
239 this.update(cx, |this, cx| {
240 this.message_removed(id, cx);
241 })?;
242 Ok(())
243 })
244 }
245
246 pub fn update_message(
247 &mut self,
248 id: u64,
249 message: MessageParams,
250 cx: &mut Context<Self>,
251 ) -> Result<Task<Result<()>>> {
252 self.message_update(
253 ChannelMessageId::Saved(id),
254 message.text.clone(),
255 message.mentions.clone(),
256 Some(OffsetDateTime::now_utc()),
257 cx,
258 );
259
260 let nonce: u128 = self.rng.r#gen();
261
262 let request = self.rpc.request(proto::UpdateChannelMessage {
263 channel_id: self.channel_id.0,
264 message_id: id,
265 body: message.text,
266 nonce: Some(nonce.into()),
267 mentions: mentions_to_proto(&message.mentions),
268 });
269 Ok(cx.spawn(async move |_, _| {
270 request.await?;
271 Ok(())
272 }))
273 }
274
275 pub fn load_more_messages(&mut self, cx: &mut Context<Self>) -> Option<Task<Option<()>>> {
276 if self.loaded_all_messages {
277 return None;
278 }
279
280 let rpc = self.rpc.clone();
281 let user_store = self.user_store.clone();
282 let channel_id = self.channel_id;
283 let before_message_id = self.first_loaded_message_id()?;
284 Some(cx.spawn(async move |this, cx| {
285 async move {
286 let response = rpc
287 .request(proto::GetChannelMessages {
288 channel_id: channel_id.0,
289 before_message_id,
290 })
291 .await?;
292 Self::handle_loaded_messages(
293 this,
294 user_store,
295 rpc,
296 response.messages,
297 response.done,
298 cx,
299 )
300 .await?;
301
302 anyhow::Ok(())
303 }
304 .log_err()
305 .await
306 }))
307 }
308
309 pub fn first_loaded_message_id(&mut self) -> Option<u64> {
310 self.first_loaded_message_id
311 }
312
313 /// Load a message by its id, if it's already stored locally.
314 pub fn find_loaded_message(&self, id: u64) -> Option<&ChannelMessage> {
315 self.messages.iter().find(|message| match message.id {
316 ChannelMessageId::Saved(message_id) => message_id == id,
317 ChannelMessageId::Pending(_) => false,
318 })
319 }
320
321 /// Load all of the chat messages since a certain message id.
322 ///
323 /// For now, we always maintain a suffix of the channel's messages.
324 pub async fn load_history_since_message(
325 chat: Entity<Self>,
326 message_id: u64,
327 mut cx: AsyncApp,
328 ) -> Option<usize> {
329 loop {
330 let step = chat
331 .update(&mut cx, |chat, cx| {
332 if let Some(first_id) = chat.first_loaded_message_id()
333 && first_id <= message_id {
334 let mut cursor = chat
335 .messages
336 .cursor::<Dimensions<ChannelMessageId, Count>>(&());
337 let message_id = ChannelMessageId::Saved(message_id);
338 cursor.seek(&message_id, Bias::Left);
339 return ControlFlow::Break(
340 if cursor
341 .item()
342 .map_or(false, |message| message.id == message_id)
343 {
344 Some(cursor.start().1.0)
345 } else {
346 None
347 },
348 );
349 }
350 ControlFlow::Continue(chat.load_more_messages(cx))
351 })
352 .log_err()?;
353 match step {
354 ControlFlow::Break(ix) => return ix,
355 ControlFlow::Continue(task) => task?.await?,
356 }
357 }
358 }
359
360 pub fn acknowledge_last_message(&mut self, cx: &mut Context<Self>) {
361 if let ChannelMessageId::Saved(latest_message_id) = self.messages.summary().max_id
362 && self
363 .last_acknowledged_id
364 .map_or(true, |acknowledged_id| acknowledged_id < latest_message_id)
365 {
366 self.rpc
367 .send(proto::AckChannelMessage {
368 channel_id: self.channel_id.0,
369 message_id: latest_message_id,
370 })
371 .ok();
372 self.last_acknowledged_id = Some(latest_message_id);
373 self.channel_store.update(cx, |store, cx| {
374 store.acknowledge_message_id(self.channel_id, latest_message_id, cx);
375 });
376 }
377 }
378
379 async fn handle_loaded_messages(
380 this: WeakEntity<Self>,
381 user_store: Entity<UserStore>,
382 rpc: Arc<Client>,
383 proto_messages: Vec<proto::ChannelMessage>,
384 loaded_all_messages: bool,
385 cx: &mut AsyncApp,
386 ) -> Result<()> {
387 let loaded_messages = messages_from_proto(proto_messages, &user_store, cx).await?;
388
389 let first_loaded_message_id = loaded_messages.first().map(|m| m.id);
390 let loaded_message_ids = this.read_with(cx, |this, _| {
391 let mut loaded_message_ids: HashSet<u64> = HashSet::default();
392 for message in loaded_messages.iter() {
393 if let Some(saved_message_id) = message.id.into() {
394 loaded_message_ids.insert(saved_message_id);
395 }
396 }
397 for message in this.messages.iter() {
398 if let Some(saved_message_id) = message.id.into() {
399 loaded_message_ids.insert(saved_message_id);
400 }
401 }
402 loaded_message_ids
403 })?;
404
405 let missing_ancestors = loaded_messages
406 .iter()
407 .filter_map(|message| {
408 if let Some(ancestor_id) = message.reply_to_message_id
409 && !loaded_message_ids.contains(&ancestor_id) {
410 return Some(ancestor_id);
411 }
412 None
413 })
414 .collect::<Vec<_>>();
415
416 let loaded_ancestors = if missing_ancestors.is_empty() {
417 None
418 } else {
419 let response = rpc
420 .request(proto::GetChannelMessagesById {
421 message_ids: missing_ancestors,
422 })
423 .await?;
424 Some(messages_from_proto(response.messages, &user_store, cx).await?)
425 };
426 this.update(cx, |this, cx| {
427 this.first_loaded_message_id = first_loaded_message_id.and_then(|msg_id| msg_id.into());
428 this.loaded_all_messages = loaded_all_messages;
429 this.insert_messages(loaded_messages, cx);
430 if let Some(loaded_ancestors) = loaded_ancestors {
431 this.insert_messages(loaded_ancestors, cx);
432 }
433 })?;
434
435 Ok(())
436 }
437
438 pub fn rejoin(&mut self, cx: &mut Context<Self>) {
439 let user_store = self.user_store.clone();
440 let rpc = self.rpc.clone();
441 let channel_id = self.channel_id;
442 cx.spawn(async move |this, cx| {
443 async move {
444 let response = rpc
445 .request(proto::JoinChannelChat {
446 channel_id: channel_id.0,
447 })
448 .await?;
449 Self::handle_loaded_messages(
450 this.clone(),
451 user_store.clone(),
452 rpc.clone(),
453 response.messages,
454 response.done,
455 cx,
456 )
457 .await?;
458
459 let pending_messages = this.read_with(cx, |this, _| {
460 this.pending_messages().cloned().collect::<Vec<_>>()
461 })?;
462
463 for pending_message in pending_messages {
464 let request = rpc.request(proto::SendChannelMessage {
465 channel_id: channel_id.0,
466 body: pending_message.body,
467 mentions: mentions_to_proto(&pending_message.mentions),
468 nonce: Some(pending_message.nonce.into()),
469 reply_to_message_id: pending_message.reply_to_message_id,
470 });
471 let response = request.await?;
472 let message = ChannelMessage::from_proto(
473 response.message.context("invalid message")?,
474 &user_store,
475 cx,
476 )
477 .await?;
478 this.update(cx, |this, cx| {
479 this.insert_messages(SumTree::from_item(message, &()), cx);
480 })?;
481 }
482
483 anyhow::Ok(())
484 }
485 .log_err()
486 .await
487 })
488 .detach();
489 }
490
491 pub fn message_count(&self) -> usize {
492 self.messages.summary().count
493 }
494
495 pub fn messages(&self) -> &SumTree<ChannelMessage> {
496 &self.messages
497 }
498
499 pub fn message(&self, ix: usize) -> &ChannelMessage {
500 let mut cursor = self.messages.cursor::<Count>(&());
501 cursor.seek(&Count(ix), Bias::Right);
502 cursor.item().unwrap()
503 }
504
505 pub fn acknowledge_message(&mut self, id: u64) {
506 if self.acknowledged_message_ids.insert(id) {
507 self.rpc
508 .send(proto::AckChannelMessage {
509 channel_id: self.channel_id.0,
510 message_id: id,
511 })
512 .ok();
513 }
514 }
515
516 pub fn messages_in_range(&self, range: Range<usize>) -> impl Iterator<Item = &ChannelMessage> {
517 let mut cursor = self.messages.cursor::<Count>(&());
518 cursor.seek(&Count(range.start), Bias::Right);
519 cursor.take(range.len())
520 }
521
522 pub fn pending_messages(&self) -> impl Iterator<Item = &ChannelMessage> {
523 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
524 cursor.seek(&ChannelMessageId::Pending(0), Bias::Left);
525 cursor
526 }
527
528 async fn handle_message_sent(
529 this: Entity<Self>,
530 message: TypedEnvelope<proto::ChannelMessageSent>,
531 mut cx: AsyncApp,
532 ) -> Result<()> {
533 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
534 let message = message.payload.message.context("empty message")?;
535 let message_id = message.id;
536
537 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
538 this.update(&mut cx, |this, cx| {
539 this.insert_messages(SumTree::from_item(message, &()), cx);
540 cx.emit(ChannelChatEvent::NewMessage {
541 channel_id: this.channel_id,
542 message_id,
543 })
544 })?;
545
546 Ok(())
547 }
548
549 async fn handle_message_removed(
550 this: Entity<Self>,
551 message: TypedEnvelope<proto::RemoveChannelMessage>,
552 mut cx: AsyncApp,
553 ) -> Result<()> {
554 this.update(&mut cx, |this, cx| {
555 this.message_removed(message.payload.message_id, cx)
556 })?;
557 Ok(())
558 }
559
560 async fn handle_message_updated(
561 this: Entity<Self>,
562 message: TypedEnvelope<proto::ChannelMessageUpdate>,
563 mut cx: AsyncApp,
564 ) -> Result<()> {
565 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
566 let message = message.payload.message.context("empty message")?;
567
568 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
569
570 this.update(&mut cx, |this, cx| {
571 this.message_update(
572 message.id,
573 message.body,
574 message.mentions,
575 message.edited_at,
576 cx,
577 )
578 })?;
579 Ok(())
580 }
581
582 fn insert_messages(&mut self, messages: SumTree<ChannelMessage>, cx: &mut Context<Self>) {
583 if let Some((first_message, last_message)) = messages.first().zip(messages.last()) {
584 let nonces = messages
585 .cursor::<()>(&())
586 .map(|m| m.nonce)
587 .collect::<HashSet<_>>();
588
589 let mut old_cursor = self
590 .messages
591 .cursor::<Dimensions<ChannelMessageId, Count>>(&());
592 let mut new_messages = old_cursor.slice(&first_message.id, Bias::Left);
593 let start_ix = old_cursor.start().1.0;
594 let removed_messages = old_cursor.slice(&last_message.id, Bias::Right);
595 let removed_count = removed_messages.summary().count;
596 let new_count = messages.summary().count;
597 let end_ix = start_ix + removed_count;
598
599 new_messages.append(messages, &());
600
601 let mut ranges = Vec::<Range<usize>>::new();
602 if new_messages.last().unwrap().is_pending() {
603 new_messages.append(old_cursor.suffix(), &());
604 } else {
605 new_messages.append(
606 old_cursor.slice(&ChannelMessageId::Pending(0), Bias::Left),
607 &(),
608 );
609
610 while let Some(message) = old_cursor.item() {
611 let message_ix = old_cursor.start().1.0;
612 if nonces.contains(&message.nonce) {
613 if ranges.last().map_or(false, |r| r.end == message_ix) {
614 ranges.last_mut().unwrap().end += 1;
615 } else {
616 ranges.push(message_ix..message_ix + 1);
617 }
618 } else {
619 new_messages.push(message.clone(), &());
620 }
621 old_cursor.next();
622 }
623 }
624
625 drop(old_cursor);
626 self.messages = new_messages;
627
628 for range in ranges.into_iter().rev() {
629 cx.emit(ChannelChatEvent::MessagesUpdated {
630 old_range: range,
631 new_count: 0,
632 });
633 }
634 cx.emit(ChannelChatEvent::MessagesUpdated {
635 old_range: start_ix..end_ix,
636 new_count,
637 });
638
639 cx.notify();
640 }
641 }
642
643 fn message_removed(&mut self, id: u64, cx: &mut Context<Self>) {
644 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
645 let mut messages = cursor.slice(&ChannelMessageId::Saved(id), Bias::Left);
646 if let Some(item) = cursor.item()
647 && item.id == ChannelMessageId::Saved(id) {
648 let deleted_message_ix = messages.summary().count;
649 cursor.next();
650 messages.append(cursor.suffix(), &());
651 drop(cursor);
652 self.messages = messages;
653
654 // If the message that was deleted was the last acknowledged message,
655 // replace the acknowledged message with an earlier one.
656 self.channel_store.update(cx, |store, _| {
657 let summary = self.messages.summary();
658 if summary.count == 0 {
659 store.set_acknowledged_message_id(self.channel_id, None);
660 } else if deleted_message_ix == summary.count
661 && let ChannelMessageId::Saved(id) = summary.max_id {
662 store.set_acknowledged_message_id(self.channel_id, Some(id));
663 }
664 });
665
666 cx.emit(ChannelChatEvent::MessagesUpdated {
667 old_range: deleted_message_ix..deleted_message_ix + 1,
668 new_count: 0,
669 });
670 }
671 }
672
673 fn message_update(
674 &mut self,
675 id: ChannelMessageId,
676 body: String,
677 mentions: Vec<(Range<usize>, u64)>,
678 edited_at: Option<OffsetDateTime>,
679 cx: &mut Context<Self>,
680 ) {
681 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
682 let mut messages = cursor.slice(&id, Bias::Left);
683 let ix = messages.summary().count;
684
685 if let Some(mut message_to_update) = cursor.item().cloned() {
686 message_to_update.body = body;
687 message_to_update.mentions = mentions;
688 message_to_update.edited_at = edited_at;
689 messages.push(message_to_update, &());
690 cursor.next();
691 }
692
693 messages.append(cursor.suffix(), &());
694 drop(cursor);
695 self.messages = messages;
696
697 cx.emit(ChannelChatEvent::UpdateMessage {
698 message_ix: ix,
699 message_id: id,
700 });
701
702 cx.notify();
703 }
704}
705
706async fn messages_from_proto(
707 proto_messages: Vec<proto::ChannelMessage>,
708 user_store: &Entity<UserStore>,
709 cx: &mut AsyncApp,
710) -> Result<SumTree<ChannelMessage>> {
711 let messages = ChannelMessage::from_proto_vec(proto_messages, user_store, cx).await?;
712 let mut result = SumTree::default();
713 result.extend(messages, &());
714 Ok(result)
715}
716
717impl ChannelMessage {
718 pub async fn from_proto(
719 message: proto::ChannelMessage,
720 user_store: &Entity<UserStore>,
721 cx: &mut AsyncApp,
722 ) -> Result<Self> {
723 let sender = user_store
724 .update(cx, |user_store, cx| {
725 user_store.get_user(message.sender_id, cx)
726 })?
727 .await?;
728
729 let edited_at = message.edited_at.and_then(|t| -> Option<OffsetDateTime> {
730 if let Ok(a) = OffsetDateTime::from_unix_timestamp(t as i64) {
731 return Some(a);
732 }
733
734 None
735 });
736
737 Ok(ChannelMessage {
738 id: ChannelMessageId::Saved(message.id),
739 body: message.body,
740 mentions: message
741 .mentions
742 .into_iter()
743 .filter_map(|mention| {
744 let range = mention.range?;
745 Some((range.start as usize..range.end as usize, mention.user_id))
746 })
747 .collect(),
748 timestamp: OffsetDateTime::from_unix_timestamp(message.timestamp as i64)?,
749 sender,
750 nonce: message.nonce.context("nonce is required")?.into(),
751 reply_to_message_id: message.reply_to_message_id,
752 edited_at,
753 })
754 }
755
756 pub fn is_pending(&self) -> bool {
757 matches!(self.id, ChannelMessageId::Pending(_))
758 }
759
760 pub async fn from_proto_vec(
761 proto_messages: Vec<proto::ChannelMessage>,
762 user_store: &Entity<UserStore>,
763 cx: &mut AsyncApp,
764 ) -> Result<Vec<Self>> {
765 let unique_user_ids = proto_messages
766 .iter()
767 .map(|m| m.sender_id)
768 .collect::<HashSet<_>>()
769 .into_iter()
770 .collect();
771 user_store
772 .update(cx, |user_store, cx| {
773 user_store.get_users(unique_user_ids, cx)
774 })?
775 .await?;
776
777 let mut messages = Vec::with_capacity(proto_messages.len());
778 for message in proto_messages {
779 messages.push(ChannelMessage::from_proto(message, user_store, cx).await?);
780 }
781 Ok(messages)
782 }
783}
784
785pub fn mentions_to_proto(mentions: &[(Range<usize>, UserId)]) -> Vec<proto::ChatMention> {
786 mentions
787 .iter()
788 .map(|(range, user_id)| proto::ChatMention {
789 range: Some(proto::Range {
790 start: range.start as u64,
791 end: range.end as u64,
792 }),
793 user_id: *user_id,
794 })
795 .collect()
796}
797
798impl sum_tree::Item for ChannelMessage {
799 type Summary = ChannelMessageSummary;
800
801 fn summary(&self, _cx: &()) -> Self::Summary {
802 ChannelMessageSummary {
803 max_id: self.id,
804 count: 1,
805 }
806 }
807}
808
809impl Default for ChannelMessageId {
810 fn default() -> Self {
811 Self::Saved(0)
812 }
813}
814
815impl sum_tree::Summary for ChannelMessageSummary {
816 type Context = ();
817
818 fn zero(_cx: &Self::Context) -> Self {
819 Default::default()
820 }
821
822 fn add_summary(&mut self, summary: &Self, _: &()) {
823 self.max_id = summary.max_id;
824 self.count += summary.count;
825 }
826}
827
828impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for ChannelMessageId {
829 fn zero(_cx: &()) -> Self {
830 Default::default()
831 }
832
833 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
834 debug_assert!(summary.max_id > *self);
835 *self = summary.max_id;
836 }
837}
838
839impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for Count {
840 fn zero(_cx: &()) -> Self {
841 Default::default()
842 }
843
844 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
845 self.0 += summary.count;
846 }
847}
848
849impl<'a> From<&'a str> for MessageParams {
850 fn from(value: &'a str) -> Self {
851 Self {
852 text: value.into(),
853 mentions: Vec::new(),
854 reply_to_message_id: None,
855 }
856 }
857}