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 if 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 }
351 ControlFlow::Continue(chat.load_more_messages(cx))
352 })
353 .log_err()?;
354 match step {
355 ControlFlow::Break(ix) => return ix,
356 ControlFlow::Continue(task) => task?.await?,
357 }
358 }
359 }
360
361 pub fn acknowledge_last_message(&mut self, cx: &mut Context<Self>) {
362 if let ChannelMessageId::Saved(latest_message_id) = self.messages.summary().max_id {
363 if self
364 .last_acknowledged_id
365 .map_or(true, |acknowledged_id| acknowledged_id < latest_message_id)
366 {
367 self.rpc
368 .send(proto::AckChannelMessage {
369 channel_id: self.channel_id.0,
370 message_id: latest_message_id,
371 })
372 .ok();
373 self.last_acknowledged_id = Some(latest_message_id);
374 self.channel_store.update(cx, |store, cx| {
375 store.acknowledge_message_id(self.channel_id, latest_message_id, cx);
376 });
377 }
378 }
379 }
380
381 async fn handle_loaded_messages(
382 this: WeakEntity<Self>,
383 user_store: Entity<UserStore>,
384 rpc: Arc<Client>,
385 proto_messages: Vec<proto::ChannelMessage>,
386 loaded_all_messages: bool,
387 cx: &mut AsyncApp,
388 ) -> Result<()> {
389 let loaded_messages = messages_from_proto(proto_messages, &user_store, cx).await?;
390
391 let first_loaded_message_id = loaded_messages.first().map(|m| m.id);
392 let loaded_message_ids = this.read_with(cx, |this, _| {
393 let mut loaded_message_ids: HashSet<u64> = HashSet::default();
394 for message in loaded_messages.iter() {
395 if let Some(saved_message_id) = message.id.into() {
396 loaded_message_ids.insert(saved_message_id);
397 }
398 }
399 for message in this.messages.iter() {
400 if let Some(saved_message_id) = message.id.into() {
401 loaded_message_ids.insert(saved_message_id);
402 }
403 }
404 loaded_message_ids
405 })?;
406
407 let missing_ancestors = loaded_messages
408 .iter()
409 .filter_map(|message| {
410 if let Some(ancestor_id) = message.reply_to_message_id {
411 if !loaded_message_ids.contains(&ancestor_id) {
412 return Some(ancestor_id);
413 }
414 }
415 None
416 })
417 .collect::<Vec<_>>();
418
419 let loaded_ancestors = if missing_ancestors.is_empty() {
420 None
421 } else {
422 let response = rpc
423 .request(proto::GetChannelMessagesById {
424 message_ids: missing_ancestors,
425 })
426 .await?;
427 Some(messages_from_proto(response.messages, &user_store, cx).await?)
428 };
429 this.update(cx, |this, cx| {
430 this.first_loaded_message_id = first_loaded_message_id.and_then(|msg_id| msg_id.into());
431 this.loaded_all_messages = loaded_all_messages;
432 this.insert_messages(loaded_messages, cx);
433 if let Some(loaded_ancestors) = loaded_ancestors {
434 this.insert_messages(loaded_ancestors, cx);
435 }
436 })?;
437
438 Ok(())
439 }
440
441 pub fn rejoin(&mut self, cx: &mut Context<Self>) {
442 let user_store = self.user_store.clone();
443 let rpc = self.rpc.clone();
444 let channel_id = self.channel_id;
445 cx.spawn(async move |this, cx| {
446 async move {
447 let response = rpc
448 .request(proto::JoinChannelChat {
449 channel_id: channel_id.0,
450 })
451 .await?;
452 Self::handle_loaded_messages(
453 this.clone(),
454 user_store.clone(),
455 rpc.clone(),
456 response.messages,
457 response.done,
458 cx,
459 )
460 .await?;
461
462 let pending_messages = this.read_with(cx, |this, _| {
463 this.pending_messages().cloned().collect::<Vec<_>>()
464 })?;
465
466 for pending_message in pending_messages {
467 let request = rpc.request(proto::SendChannelMessage {
468 channel_id: channel_id.0,
469 body: pending_message.body,
470 mentions: mentions_to_proto(&pending_message.mentions),
471 nonce: Some(pending_message.nonce.into()),
472 reply_to_message_id: pending_message.reply_to_message_id,
473 });
474 let response = request.await?;
475 let message = ChannelMessage::from_proto(
476 response.message.context("invalid message")?,
477 &user_store,
478 cx,
479 )
480 .await?;
481 this.update(cx, |this, cx| {
482 this.insert_messages(SumTree::from_item(message, &()), cx);
483 })?;
484 }
485
486 anyhow::Ok(())
487 }
488 .log_err()
489 .await
490 })
491 .detach();
492 }
493
494 pub fn message_count(&self) -> usize {
495 self.messages.summary().count
496 }
497
498 pub fn messages(&self) -> &SumTree<ChannelMessage> {
499 &self.messages
500 }
501
502 pub fn message(&self, ix: usize) -> &ChannelMessage {
503 let mut cursor = self.messages.cursor::<Count>(&());
504 cursor.seek(&Count(ix), Bias::Right);
505 cursor.item().unwrap()
506 }
507
508 pub fn acknowledge_message(&mut self, id: u64) {
509 if self.acknowledged_message_ids.insert(id) {
510 self.rpc
511 .send(proto::AckChannelMessage {
512 channel_id: self.channel_id.0,
513 message_id: id,
514 })
515 .ok();
516 }
517 }
518
519 pub fn messages_in_range(&self, range: Range<usize>) -> impl Iterator<Item = &ChannelMessage> {
520 let mut cursor = self.messages.cursor::<Count>(&());
521 cursor.seek(&Count(range.start), Bias::Right);
522 cursor.take(range.len())
523 }
524
525 pub fn pending_messages(&self) -> impl Iterator<Item = &ChannelMessage> {
526 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
527 cursor.seek(&ChannelMessageId::Pending(0), Bias::Left);
528 cursor
529 }
530
531 async fn handle_message_sent(
532 this: Entity<Self>,
533 message: TypedEnvelope<proto::ChannelMessageSent>,
534 mut cx: AsyncApp,
535 ) -> Result<()> {
536 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
537 let message = message.payload.message.context("empty message")?;
538 let message_id = message.id;
539
540 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
541 this.update(&mut cx, |this, cx| {
542 this.insert_messages(SumTree::from_item(message, &()), cx);
543 cx.emit(ChannelChatEvent::NewMessage {
544 channel_id: this.channel_id,
545 message_id,
546 })
547 })?;
548
549 Ok(())
550 }
551
552 async fn handle_message_removed(
553 this: Entity<Self>,
554 message: TypedEnvelope<proto::RemoveChannelMessage>,
555 mut cx: AsyncApp,
556 ) -> Result<()> {
557 this.update(&mut cx, |this, cx| {
558 this.message_removed(message.payload.message_id, cx)
559 })?;
560 Ok(())
561 }
562
563 async fn handle_message_updated(
564 this: Entity<Self>,
565 message: TypedEnvelope<proto::ChannelMessageUpdate>,
566 mut cx: AsyncApp,
567 ) -> Result<()> {
568 let user_store = this.read_with(&mut cx, |this, _| this.user_store.clone())?;
569 let message = message.payload.message.context("empty message")?;
570
571 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
572
573 this.update(&mut cx, |this, cx| {
574 this.message_update(
575 message.id,
576 message.body,
577 message.mentions,
578 message.edited_at,
579 cx,
580 )
581 })?;
582 Ok(())
583 }
584
585 fn insert_messages(&mut self, messages: SumTree<ChannelMessage>, cx: &mut Context<Self>) {
586 if let Some((first_message, last_message)) = messages.first().zip(messages.last()) {
587 let nonces = messages
588 .cursor::<()>(&())
589 .map(|m| m.nonce)
590 .collect::<HashSet<_>>();
591
592 let mut old_cursor = self
593 .messages
594 .cursor::<Dimensions<ChannelMessageId, Count>>(&());
595 let mut new_messages = old_cursor.slice(&first_message.id, Bias::Left);
596 let start_ix = old_cursor.start().1.0;
597 let removed_messages = old_cursor.slice(&last_message.id, Bias::Right);
598 let removed_count = removed_messages.summary().count;
599 let new_count = messages.summary().count;
600 let end_ix = start_ix + removed_count;
601
602 new_messages.append(messages, &());
603
604 let mut ranges = Vec::<Range<usize>>::new();
605 if new_messages.last().unwrap().is_pending() {
606 new_messages.append(old_cursor.suffix(), &());
607 } else {
608 new_messages.append(
609 old_cursor.slice(&ChannelMessageId::Pending(0), Bias::Left),
610 &(),
611 );
612
613 while let Some(message) = old_cursor.item() {
614 let message_ix = old_cursor.start().1.0;
615 if nonces.contains(&message.nonce) {
616 if ranges.last().map_or(false, |r| r.end == message_ix) {
617 ranges.last_mut().unwrap().end += 1;
618 } else {
619 ranges.push(message_ix..message_ix + 1);
620 }
621 } else {
622 new_messages.push(message.clone(), &());
623 }
624 old_cursor.next();
625 }
626 }
627
628 drop(old_cursor);
629 self.messages = new_messages;
630
631 for range in ranges.into_iter().rev() {
632 cx.emit(ChannelChatEvent::MessagesUpdated {
633 old_range: range,
634 new_count: 0,
635 });
636 }
637 cx.emit(ChannelChatEvent::MessagesUpdated {
638 old_range: start_ix..end_ix,
639 new_count,
640 });
641
642 cx.notify();
643 }
644 }
645
646 fn message_removed(&mut self, id: u64, cx: &mut Context<Self>) {
647 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
648 let mut messages = cursor.slice(&ChannelMessageId::Saved(id), Bias::Left);
649 if let Some(item) = cursor.item() {
650 if item.id == ChannelMessageId::Saved(id) {
651 let deleted_message_ix = messages.summary().count;
652 cursor.next();
653 messages.append(cursor.suffix(), &());
654 drop(cursor);
655 self.messages = messages;
656
657 // If the message that was deleted was the last acknowledged message,
658 // replace the acknowledged message with an earlier one.
659 self.channel_store.update(cx, |store, _| {
660 let summary = self.messages.summary();
661 if summary.count == 0 {
662 store.set_acknowledged_message_id(self.channel_id, None);
663 } else if deleted_message_ix == summary.count {
664 if let ChannelMessageId::Saved(id) = summary.max_id {
665 store.set_acknowledged_message_id(self.channel_id, Some(id));
666 }
667 }
668 });
669
670 cx.emit(ChannelChatEvent::MessagesUpdated {
671 old_range: deleted_message_ix..deleted_message_ix + 1,
672 new_count: 0,
673 });
674 }
675 }
676 }
677
678 fn message_update(
679 &mut self,
680 id: ChannelMessageId,
681 body: String,
682 mentions: Vec<(Range<usize>, u64)>,
683 edited_at: Option<OffsetDateTime>,
684 cx: &mut Context<Self>,
685 ) {
686 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
687 let mut messages = cursor.slice(&id, Bias::Left);
688 let ix = messages.summary().count;
689
690 if let Some(mut message_to_update) = cursor.item().cloned() {
691 message_to_update.body = body;
692 message_to_update.mentions = mentions;
693 message_to_update.edited_at = edited_at;
694 messages.push(message_to_update, &());
695 cursor.next();
696 }
697
698 messages.append(cursor.suffix(), &());
699 drop(cursor);
700 self.messages = messages;
701
702 cx.emit(ChannelChatEvent::UpdateMessage {
703 message_ix: ix,
704 message_id: id,
705 });
706
707 cx.notify();
708 }
709}
710
711async fn messages_from_proto(
712 proto_messages: Vec<proto::ChannelMessage>,
713 user_store: &Entity<UserStore>,
714 cx: &mut AsyncApp,
715) -> Result<SumTree<ChannelMessage>> {
716 let messages = ChannelMessage::from_proto_vec(proto_messages, user_store, cx).await?;
717 let mut result = SumTree::default();
718 result.extend(messages, &());
719 Ok(result)
720}
721
722impl ChannelMessage {
723 pub async fn from_proto(
724 message: proto::ChannelMessage,
725 user_store: &Entity<UserStore>,
726 cx: &mut AsyncApp,
727 ) -> Result<Self> {
728 let sender = user_store
729 .update(cx, |user_store, cx| {
730 user_store.get_user(message.sender_id, cx)
731 })?
732 .await?;
733
734 let edited_at = message.edited_at.and_then(|t| -> Option<OffsetDateTime> {
735 if let Ok(a) = OffsetDateTime::from_unix_timestamp(t as i64) {
736 return Some(a);
737 }
738
739 None
740 });
741
742 Ok(ChannelMessage {
743 id: ChannelMessageId::Saved(message.id),
744 body: message.body,
745 mentions: message
746 .mentions
747 .into_iter()
748 .filter_map(|mention| {
749 let range = mention.range?;
750 Some((range.start as usize..range.end as usize, mention.user_id))
751 })
752 .collect(),
753 timestamp: OffsetDateTime::from_unix_timestamp(message.timestamp as i64)?,
754 sender,
755 nonce: message.nonce.context("nonce is required")?.into(),
756 reply_to_message_id: message.reply_to_message_id,
757 edited_at,
758 })
759 }
760
761 pub fn is_pending(&self) -> bool {
762 matches!(self.id, ChannelMessageId::Pending(_))
763 }
764
765 pub async fn from_proto_vec(
766 proto_messages: Vec<proto::ChannelMessage>,
767 user_store: &Entity<UserStore>,
768 cx: &mut AsyncApp,
769 ) -> Result<Vec<Self>> {
770 let unique_user_ids = proto_messages
771 .iter()
772 .map(|m| m.sender_id)
773 .collect::<HashSet<_>>()
774 .into_iter()
775 .collect();
776 user_store
777 .update(cx, |user_store, cx| {
778 user_store.get_users(unique_user_ids, cx)
779 })?
780 .await?;
781
782 let mut messages = Vec::with_capacity(proto_messages.len());
783 for message in proto_messages {
784 messages.push(ChannelMessage::from_proto(message, user_store, cx).await?);
785 }
786 Ok(messages)
787 }
788}
789
790pub fn mentions_to_proto(mentions: &[(Range<usize>, UserId)]) -> Vec<proto::ChatMention> {
791 mentions
792 .iter()
793 .map(|(range, user_id)| proto::ChatMention {
794 range: Some(proto::Range {
795 start: range.start as u64,
796 end: range.end as u64,
797 }),
798 user_id: *user_id,
799 })
800 .collect()
801}
802
803impl sum_tree::Item for ChannelMessage {
804 type Summary = ChannelMessageSummary;
805
806 fn summary(&self, _cx: &()) -> Self::Summary {
807 ChannelMessageSummary {
808 max_id: self.id,
809 count: 1,
810 }
811 }
812}
813
814impl Default for ChannelMessageId {
815 fn default() -> Self {
816 Self::Saved(0)
817 }
818}
819
820impl sum_tree::Summary for ChannelMessageSummary {
821 type Context = ();
822
823 fn zero(_cx: &Self::Context) -> Self {
824 Default::default()
825 }
826
827 fn add_summary(&mut self, summary: &Self, _: &()) {
828 self.max_id = summary.max_id;
829 self.count += summary.count;
830 }
831}
832
833impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for ChannelMessageId {
834 fn zero(_cx: &()) -> Self {
835 Default::default()
836 }
837
838 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
839 debug_assert!(summary.max_id > *self);
840 *self = summary.max_id;
841 }
842}
843
844impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for Count {
845 fn zero(_cx: &()) -> Self {
846 Default::default()
847 }
848
849 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
850 self.0 += summary.count;
851 }
852}
853
854impl<'a> From<&'a str> for MessageParams {
855 fn from(value: &'a str) -> Self {
856 Self {
857 text: value.into(),
858 mentions: Vec::new(),
859 reply_to_message_id: None,
860 }
861 }
862}