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, 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 if first_id <= message_id {
334 let mut cursor = chat.messages.cursor::<(ChannelMessageId, Count)>(&());
335 let message_id = ChannelMessageId::Saved(message_id);
336 cursor.seek(&message_id, Bias::Left);
337 return ControlFlow::Break(
338 if cursor
339 .item()
340 .map_or(false, |message| message.id == message_id)
341 {
342 Some(cursor.start().1.0)
343 } else {
344 None
345 },
346 );
347 }
348 }
349 ControlFlow::Continue(chat.load_more_messages(cx))
350 })
351 .log_err()?;
352 match step {
353 ControlFlow::Break(ix) => return ix,
354 ControlFlow::Continue(task) => task?.await?,
355 }
356 }
357 }
358
359 pub fn acknowledge_last_message(&mut self, cx: &mut Context<Self>) {
360 if let ChannelMessageId::Saved(latest_message_id) = self.messages.summary().max_id {
361 if self
362 .last_acknowledged_id
363 .map_or(true, |acknowledged_id| acknowledged_id < latest_message_id)
364 {
365 self.rpc
366 .send(proto::AckChannelMessage {
367 channel_id: self.channel_id.0,
368 message_id: latest_message_id,
369 })
370 .ok();
371 self.last_acknowledged_id = Some(latest_message_id);
372 self.channel_store.update(cx, |store, cx| {
373 store.acknowledge_message_id(self.channel_id, latest_message_id, cx);
374 });
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 if !loaded_message_ids.contains(&ancestor_id) {
410 return Some(ancestor_id);
411 }
412 }
413 None
414 })
415 .collect::<Vec<_>>();
416
417 let loaded_ancestors = if missing_ancestors.is_empty() {
418 None
419 } else {
420 let response = rpc
421 .request(proto::GetChannelMessagesById {
422 message_ids: missing_ancestors,
423 })
424 .await?;
425 Some(messages_from_proto(response.messages, &user_store, cx).await?)
426 };
427 this.update(cx, |this, cx| {
428 this.first_loaded_message_id = first_loaded_message_id.and_then(|msg_id| msg_id.into());
429 this.loaded_all_messages = loaded_all_messages;
430 this.insert_messages(loaded_messages, cx);
431 if let Some(loaded_ancestors) = loaded_ancestors {
432 this.insert_messages(loaded_ancestors, cx);
433 }
434 })?;
435
436 Ok(())
437 }
438
439 pub fn rejoin(&mut self, cx: &mut Context<Self>) {
440 let user_store = self.user_store.clone();
441 let rpc = self.rpc.clone();
442 let channel_id = self.channel_id;
443 cx.spawn(async move |this, cx| {
444 async move {
445 let response = rpc
446 .request(proto::JoinChannelChat {
447 channel_id: channel_id.0,
448 })
449 .await?;
450 Self::handle_loaded_messages(
451 this.clone(),
452 user_store.clone(),
453 rpc.clone(),
454 response.messages,
455 response.done,
456 cx,
457 )
458 .await?;
459
460 let pending_messages = this.read_with(cx, |this, _| {
461 this.pending_messages().cloned().collect::<Vec<_>>()
462 })?;
463
464 for pending_message in pending_messages {
465 let request = rpc.request(proto::SendChannelMessage {
466 channel_id: channel_id.0,
467 body: pending_message.body,
468 mentions: mentions_to_proto(&pending_message.mentions),
469 nonce: Some(pending_message.nonce.into()),
470 reply_to_message_id: pending_message.reply_to_message_id,
471 });
472 let response = request.await?;
473 let message = ChannelMessage::from_proto(
474 response.message.context("invalid message")?,
475 &user_store,
476 cx,
477 )
478 .await?;
479 this.update(cx, |this, cx| {
480 this.insert_messages(SumTree::from_item(message, &()), cx);
481 })?;
482 }
483
484 anyhow::Ok(())
485 }
486 .log_err()
487 .await
488 })
489 .detach();
490 }
491
492 pub fn message_count(&self) -> usize {
493 self.messages.summary().count
494 }
495
496 pub fn messages(&self) -> &SumTree<ChannelMessage> {
497 &self.messages
498 }
499
500 pub fn message(&self, ix: usize) -> &ChannelMessage {
501 let mut cursor = self.messages.cursor::<Count>(&());
502 cursor.seek(&Count(ix), Bias::Right);
503 cursor.item().unwrap()
504 }
505
506 pub fn acknowledge_message(&mut self, id: u64) {
507 if self.acknowledged_message_ids.insert(id) {
508 self.rpc
509 .send(proto::AckChannelMessage {
510 channel_id: self.channel_id.0,
511 message_id: id,
512 })
513 .ok();
514 }
515 }
516
517 pub fn messages_in_range(&self, range: Range<usize>) -> impl Iterator<Item = &ChannelMessage> {
518 let mut cursor = self.messages.cursor::<Count>(&());
519 cursor.seek(&Count(range.start), Bias::Right);
520 cursor.take(range.len())
521 }
522
523 pub fn pending_messages(&self) -> impl Iterator<Item = &ChannelMessage> {
524 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
525 cursor.seek(&ChannelMessageId::Pending(0), Bias::Left);
526 cursor
527 }
528
529 async fn handle_message_sent(
530 this: Entity<Self>,
531 message: TypedEnvelope<proto::ChannelMessageSent>,
532 mut cx: AsyncApp,
533 ) -> Result<()> {
534 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
535 let message = message.payload.message.context("empty message")?;
536 let message_id = message.id;
537
538 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
539 this.update(&mut cx, |this, cx| {
540 this.insert_messages(SumTree::from_item(message, &()), cx);
541 cx.emit(ChannelChatEvent::NewMessage {
542 channel_id: this.channel_id,
543 message_id,
544 })
545 })?;
546
547 Ok(())
548 }
549
550 async fn handle_message_removed(
551 this: Entity<Self>,
552 message: TypedEnvelope<proto::RemoveChannelMessage>,
553 mut cx: AsyncApp,
554 ) -> Result<()> {
555 this.update(&mut cx, |this, cx| {
556 this.message_removed(message.payload.message_id, cx)
557 })?;
558 Ok(())
559 }
560
561 async fn handle_message_updated(
562 this: Entity<Self>,
563 message: TypedEnvelope<proto::ChannelMessageUpdate>,
564 mut cx: AsyncApp,
565 ) -> Result<()> {
566 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
567 let message = message.payload.message.context("empty message")?;
568
569 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
570
571 this.update(&mut cx, |this, cx| {
572 this.message_update(
573 message.id,
574 message.body,
575 message.mentions,
576 message.edited_at,
577 cx,
578 )
579 })?;
580 Ok(())
581 }
582
583 fn insert_messages(&mut self, messages: SumTree<ChannelMessage>, cx: &mut Context<Self>) {
584 if let Some((first_message, last_message)) = messages.first().zip(messages.last()) {
585 let nonces = messages
586 .cursor::<()>(&())
587 .map(|m| m.nonce)
588 .collect::<HashSet<_>>();
589
590 let mut old_cursor = self.messages.cursor::<(ChannelMessageId, Count)>(&());
591 let mut new_messages = old_cursor.slice(&first_message.id, Bias::Left);
592 let start_ix = old_cursor.start().1.0;
593 let removed_messages = old_cursor.slice(&last_message.id, Bias::Right);
594 let removed_count = removed_messages.summary().count;
595 let new_count = messages.summary().count;
596 let end_ix = start_ix + removed_count;
597
598 new_messages.append(messages, &());
599
600 let mut ranges = Vec::<Range<usize>>::new();
601 if new_messages.last().unwrap().is_pending() {
602 new_messages.append(old_cursor.suffix(), &());
603 } else {
604 new_messages.append(
605 old_cursor.slice(&ChannelMessageId::Pending(0), Bias::Left),
606 &(),
607 );
608
609 while let Some(message) = old_cursor.item() {
610 let message_ix = old_cursor.start().1.0;
611 if nonces.contains(&message.nonce) {
612 if ranges.last().map_or(false, |r| r.end == message_ix) {
613 ranges.last_mut().unwrap().end += 1;
614 } else {
615 ranges.push(message_ix..message_ix + 1);
616 }
617 } else {
618 new_messages.push(message.clone(), &());
619 }
620 old_cursor.next();
621 }
622 }
623
624 drop(old_cursor);
625 self.messages = new_messages;
626
627 for range in ranges.into_iter().rev() {
628 cx.emit(ChannelChatEvent::MessagesUpdated {
629 old_range: range,
630 new_count: 0,
631 });
632 }
633 cx.emit(ChannelChatEvent::MessagesUpdated {
634 old_range: start_ix..end_ix,
635 new_count,
636 });
637
638 cx.notify();
639 }
640 }
641
642 fn message_removed(&mut self, id: u64, cx: &mut Context<Self>) {
643 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
644 let mut messages = cursor.slice(&ChannelMessageId::Saved(id), Bias::Left);
645 if let Some(item) = cursor.item() {
646 if item.id == ChannelMessageId::Saved(id) {
647 let deleted_message_ix = messages.summary().count;
648 cursor.next();
649 messages.append(cursor.suffix(), &());
650 drop(cursor);
651 self.messages = messages;
652
653 // If the message that was deleted was the last acknowledged message,
654 // replace the acknowledged message with an earlier one.
655 self.channel_store.update(cx, |store, _| {
656 let summary = self.messages.summary();
657 if summary.count == 0 {
658 store.set_acknowledged_message_id(self.channel_id, None);
659 } else if deleted_message_ix == summary.count {
660 if let ChannelMessageId::Saved(id) = summary.max_id {
661 store.set_acknowledged_message_id(self.channel_id, Some(id));
662 }
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
674 fn message_update(
675 &mut self,
676 id: ChannelMessageId,
677 body: String,
678 mentions: Vec<(Range<usize>, u64)>,
679 edited_at: Option<OffsetDateTime>,
680 cx: &mut Context<Self>,
681 ) {
682 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
683 let mut messages = cursor.slice(&id, Bias::Left);
684 let ix = messages.summary().count;
685
686 if let Some(mut message_to_update) = cursor.item().cloned() {
687 message_to_update.body = body;
688 message_to_update.mentions = mentions;
689 message_to_update.edited_at = edited_at;
690 messages.push(message_to_update, &());
691 cursor.next();
692 }
693
694 messages.append(cursor.suffix(), &());
695 drop(cursor);
696 self.messages = messages;
697
698 cx.emit(ChannelChatEvent::UpdateMessage {
699 message_ix: ix,
700 message_id: id,
701 });
702
703 cx.notify();
704 }
705}
706
707async fn messages_from_proto(
708 proto_messages: Vec<proto::ChannelMessage>,
709 user_store: &Entity<UserStore>,
710 cx: &mut AsyncApp,
711) -> Result<SumTree<ChannelMessage>> {
712 let messages = ChannelMessage::from_proto_vec(proto_messages, user_store, cx).await?;
713 let mut result = SumTree::default();
714 result.extend(messages, &());
715 Ok(result)
716}
717
718impl ChannelMessage {
719 pub async fn from_proto(
720 message: proto::ChannelMessage,
721 user_store: &Entity<UserStore>,
722 cx: &mut AsyncApp,
723 ) -> Result<Self> {
724 let sender = user_store
725 .update(cx, |user_store, cx| {
726 user_store.get_user(message.sender_id, cx)
727 })?
728 .await?;
729
730 let edited_at = message.edited_at.and_then(|t| -> Option<OffsetDateTime> {
731 if let Ok(a) = OffsetDateTime::from_unix_timestamp(t as i64) {
732 return Some(a);
733 }
734
735 None
736 });
737
738 Ok(ChannelMessage {
739 id: ChannelMessageId::Saved(message.id),
740 body: message.body,
741 mentions: message
742 .mentions
743 .into_iter()
744 .filter_map(|mention| {
745 let range = mention.range?;
746 Some((range.start as usize..range.end as usize, mention.user_id))
747 })
748 .collect(),
749 timestamp: OffsetDateTime::from_unix_timestamp(message.timestamp as i64)?,
750 sender,
751 nonce: message.nonce.context("nonce is required")?.into(),
752 reply_to_message_id: message.reply_to_message_id,
753 edited_at,
754 })
755 }
756
757 pub fn is_pending(&self) -> bool {
758 matches!(self.id, ChannelMessageId::Pending(_))
759 }
760
761 pub async fn from_proto_vec(
762 proto_messages: Vec<proto::ChannelMessage>,
763 user_store: &Entity<UserStore>,
764 cx: &mut AsyncApp,
765 ) -> Result<Vec<Self>> {
766 let unique_user_ids = proto_messages
767 .iter()
768 .map(|m| m.sender_id)
769 .collect::<HashSet<_>>()
770 .into_iter()
771 .collect();
772 user_store
773 .update(cx, |user_store, cx| {
774 user_store.get_users(unique_user_ids, cx)
775 })?
776 .await?;
777
778 let mut messages = Vec::with_capacity(proto_messages.len());
779 for message in proto_messages {
780 messages.push(ChannelMessage::from_proto(message, user_store, cx).await?);
781 }
782 Ok(messages)
783 }
784}
785
786pub fn mentions_to_proto(mentions: &[(Range<usize>, UserId)]) -> Vec<proto::ChatMention> {
787 mentions
788 .iter()
789 .map(|(range, user_id)| proto::ChatMention {
790 range: Some(proto::Range {
791 start: range.start as u64,
792 end: range.end as u64,
793 }),
794 user_id: *user_id,
795 })
796 .collect()
797}
798
799impl sum_tree::Item for ChannelMessage {
800 type Summary = ChannelMessageSummary;
801
802 fn summary(&self, _cx: &()) -> Self::Summary {
803 ChannelMessageSummary {
804 max_id: self.id,
805 count: 1,
806 }
807 }
808}
809
810impl Default for ChannelMessageId {
811 fn default() -> Self {
812 Self::Saved(0)
813 }
814}
815
816impl sum_tree::Summary for ChannelMessageSummary {
817 type Context = ();
818
819 fn zero(_cx: &Self::Context) -> Self {
820 Default::default()
821 }
822
823 fn add_summary(&mut self, summary: &Self, _: &()) {
824 self.max_id = summary.max_id;
825 self.count += summary.count;
826 }
827}
828
829impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for ChannelMessageId {
830 fn zero(_cx: &()) -> Self {
831 Default::default()
832 }
833
834 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
835 debug_assert!(summary.max_id > *self);
836 *self = summary.max_id;
837 }
838}
839
840impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for Count {
841 fn zero(_cx: &()) -> Self {
842 Default::default()
843 }
844
845 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
846 self.0 += summary.count;
847 }
848}
849
850impl<'a> From<&'a str> for MessageParams {
851 fn from(value: &'a str) -> Self {
852 Self {
853 text: value.into(),
854 mentions: Vec::new(),
855 reply_to_message_id: None,
856 }
857 }
858}