1use crate::{Channel, ChannelStore};
2use anyhow::{anyhow, Result};
3use client::{
4 proto,
5 user::{User, UserStore},
6 ChannelId, Client, Subscription, TypedEnvelope, UserId,
7};
8use collections::HashSet;
9use futures::lock::Mutex;
10use gpui::{App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Task, WeakEntity};
11use rand::prelude::*;
12use rpc::AnyProtoClient;
13use std::{
14 ops::{ControlFlow, Range},
15 sync::Arc,
16};
17use sum_tree::{Bias, SumTree};
18use time::OffsetDateTime;
19use util::{post_inc, ResultExt as _, TryFutureExt};
20
21pub struct ChannelChat {
22 pub channel_id: ChannelId,
23 messages: SumTree<ChannelMessage>,
24 acknowledged_message_ids: HashSet<u64>,
25 channel_store: Entity<ChannelStore>,
26 loaded_all_messages: bool,
27 last_acknowledged_id: Option<u64>,
28 next_pending_message_id: usize,
29 first_loaded_message_id: Option<u64>,
30 user_store: Entity<UserStore>,
31 rpc: Arc<Client>,
32 outgoing_messages_lock: Arc<Mutex<()>>,
33 rng: StdRng,
34 _subscription: Subscription,
35}
36
37#[derive(Debug, PartialEq, Eq)]
38pub struct MessageParams {
39 pub text: String,
40 pub mentions: Vec<(Range<usize>, UserId)>,
41 pub reply_to_message_id: Option<u64>,
42}
43
44#[derive(Clone, Debug)]
45pub struct ChannelMessage {
46 pub id: ChannelMessageId,
47 pub body: String,
48 pub timestamp: OffsetDateTime,
49 pub sender: Arc<User>,
50 pub nonce: u128,
51 pub mentions: Vec<(Range<usize>, UserId)>,
52 pub reply_to_message_id: Option<u64>,
53 pub edited_at: Option<OffsetDateTime>,
54}
55
56#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
57pub enum ChannelMessageId {
58 Saved(u64),
59 Pending(usize),
60}
61
62impl From<ChannelMessageId> for Option<u64> {
63 fn from(val: ChannelMessageId) -> Self {
64 match val {
65 ChannelMessageId::Saved(id) => Some(id),
66 ChannelMessageId::Pending(_) => None,
67 }
68 }
69}
70
71#[derive(Clone, Debug, Default)]
72pub struct ChannelMessageSummary {
73 max_id: ChannelMessageId,
74 count: usize,
75}
76
77#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
78struct Count(usize);
79
80#[derive(Clone, Debug, PartialEq)]
81pub enum ChannelChatEvent {
82 MessagesUpdated {
83 old_range: Range<usize>,
84 new_count: usize,
85 },
86 UpdateMessage {
87 message_id: ChannelMessageId,
88 message_ix: usize,
89 },
90 NewMessage {
91 channel_id: ChannelId,
92 message_id: u64,
93 },
94}
95
96impl EventEmitter<ChannelChatEvent> for ChannelChat {}
97pub fn init(client: &AnyProtoClient) {
98 client.add_entity_message_handler(ChannelChat::handle_message_sent);
99 client.add_entity_message_handler(ChannelChat::handle_message_removed);
100 client.add_entity_message_handler(ChannelChat::handle_message_updated);
101}
102
103impl ChannelChat {
104 pub async fn new(
105 channel: Arc<Channel>,
106 channel_store: Entity<ChannelStore>,
107 user_store: Entity<UserStore>,
108 client: Arc<Client>,
109 cx: &mut AsyncApp,
110 ) -> Result<Entity<Self>> {
111 let channel_id = channel.id;
112 let subscription = client.subscribe_to_entity(channel_id.0).unwrap();
113
114 let response = client
115 .request(proto::JoinChannelChat {
116 channel_id: channel_id.0,
117 })
118 .await?;
119
120 let handle = cx.new(|cx| {
121 cx.on_release(Self::release).detach();
122 Self {
123 channel_id: channel.id,
124 user_store: user_store.clone(),
125 channel_store,
126 rpc: client.clone(),
127 outgoing_messages_lock: Default::default(),
128 messages: Default::default(),
129 acknowledged_message_ids: Default::default(),
130 loaded_all_messages: false,
131 next_pending_message_id: 0,
132 last_acknowledged_id: None,
133 rng: StdRng::from_entropy(),
134 first_loaded_message_id: None,
135 _subscription: subscription.set_entity(&cx.entity(), &cx.to_async()),
136 }
137 })?;
138 Self::handle_loaded_messages(
139 handle.downgrade(),
140 user_store,
141 client,
142 response.messages,
143 response.done,
144 cx,
145 )
146 .await?;
147 Ok(handle)
148 }
149
150 fn release(&mut self, _: &mut App) {
151 self.rpc
152 .send(proto::LeaveChannelChat {
153 channel_id: self.channel_id.0,
154 })
155 .log_err();
156 }
157
158 pub fn channel(&self, cx: &App) -> Option<Arc<Channel>> {
159 self.channel_store
160 .read(cx)
161 .channel_for_id(self.channel_id)
162 .cloned()
163 }
164
165 pub fn client(&self) -> &Arc<Client> {
166 &self.rpc
167 }
168
169 pub fn send_message(
170 &mut self,
171 message: MessageParams,
172 cx: &mut Context<Self>,
173 ) -> Result<Task<Result<u64>>> {
174 if message.text.trim().is_empty() {
175 Err(anyhow!("message body can't be empty"))?;
176 }
177
178 let current_user = self
179 .user_store
180 .read(cx)
181 .current_user()
182 .ok_or_else(|| anyhow!("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.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.ok_or_else(|| anyhow!("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.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.update(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.update(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.ok_or_else(|| anyhow!("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.update(&mut cx, |this, _| this.user_store.clone())?;
535 let message = message
536 .payload
537 .message
538 .ok_or_else(|| anyhow!("empty message"))?;
539 let message_id = message.id;
540
541 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
542 this.update(&mut cx, |this, cx| {
543 this.insert_messages(SumTree::from_item(message, &()), cx);
544 cx.emit(ChannelChatEvent::NewMessage {
545 channel_id: this.channel_id,
546 message_id,
547 })
548 })?;
549
550 Ok(())
551 }
552
553 async fn handle_message_removed(
554 this: Entity<Self>,
555 message: TypedEnvelope<proto::RemoveChannelMessage>,
556 mut cx: AsyncApp,
557 ) -> Result<()> {
558 this.update(&mut cx, |this, cx| {
559 this.message_removed(message.payload.message_id, cx)
560 })?;
561 Ok(())
562 }
563
564 async fn handle_message_updated(
565 this: Entity<Self>,
566 message: TypedEnvelope<proto::ChannelMessageUpdate>,
567 mut cx: AsyncApp,
568 ) -> Result<()> {
569 let user_store = this.update(&mut cx, |this, _| this.user_store.clone())?;
570 let message = message
571 .payload
572 .message
573 .ok_or_else(|| anyhow!("empty message"))?;
574
575 let message = ChannelMessage::from_proto(message, &user_store, &mut cx).await?;
576
577 this.update(&mut cx, |this, cx| {
578 this.message_update(
579 message.id,
580 message.body,
581 message.mentions,
582 message.edited_at,
583 cx,
584 )
585 })?;
586 Ok(())
587 }
588
589 fn insert_messages(&mut self, messages: SumTree<ChannelMessage>, cx: &mut Context<Self>) {
590 if let Some((first_message, last_message)) = messages.first().zip(messages.last()) {
591 let nonces = messages
592 .cursor::<()>(&())
593 .map(|m| m.nonce)
594 .collect::<HashSet<_>>();
595
596 let mut old_cursor = self.messages.cursor::<(ChannelMessageId, Count)>(&());
597 let mut new_messages = old_cursor.slice(&first_message.id, Bias::Left, &());
598 let start_ix = old_cursor.start().1 .0;
599 let removed_messages = old_cursor.slice(&last_message.id, Bias::Right, &());
600 let removed_count = removed_messages.summary().count;
601 let new_count = messages.summary().count;
602 let end_ix = start_ix + removed_count;
603
604 new_messages.append(messages, &());
605
606 let mut ranges = Vec::<Range<usize>>::new();
607 if new_messages.last().unwrap().is_pending() {
608 new_messages.append(old_cursor.suffix(&()), &());
609 } else {
610 new_messages.append(
611 old_cursor.slice(&ChannelMessageId::Pending(0), Bias::Left, &()),
612 &(),
613 );
614
615 while let Some(message) = old_cursor.item() {
616 let message_ix = old_cursor.start().1 .0;
617 if nonces.contains(&message.nonce) {
618 if ranges.last().map_or(false, |r| r.end == message_ix) {
619 ranges.last_mut().unwrap().end += 1;
620 } else {
621 ranges.push(message_ix..message_ix + 1);
622 }
623 } else {
624 new_messages.push(message.clone(), &());
625 }
626 old_cursor.next(&());
627 }
628 }
629
630 drop(old_cursor);
631 self.messages = new_messages;
632
633 for range in ranges.into_iter().rev() {
634 cx.emit(ChannelChatEvent::MessagesUpdated {
635 old_range: range,
636 new_count: 0,
637 });
638 }
639 cx.emit(ChannelChatEvent::MessagesUpdated {
640 old_range: start_ix..end_ix,
641 new_count,
642 });
643
644 cx.notify();
645 }
646 }
647
648 fn message_removed(&mut self, id: u64, cx: &mut Context<Self>) {
649 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
650 let mut messages = cursor.slice(&ChannelMessageId::Saved(id), Bias::Left, &());
651 if let Some(item) = cursor.item() {
652 if item.id == ChannelMessageId::Saved(id) {
653 let deleted_message_ix = messages.summary().count;
654 cursor.next(&());
655 messages.append(cursor.suffix(&()), &());
656 drop(cursor);
657 self.messages = messages;
658
659 // If the message that was deleted was the last acknowledged message,
660 // replace the acknowledged message with an earlier one.
661 self.channel_store.update(cx, |store, _| {
662 let summary = self.messages.summary();
663 if summary.count == 0 {
664 store.set_acknowledged_message_id(self.channel_id, None);
665 } else if deleted_message_ix == summary.count {
666 if let ChannelMessageId::Saved(id) = summary.max_id {
667 store.set_acknowledged_message_id(self.channel_id, Some(id));
668 }
669 }
670 });
671
672 cx.emit(ChannelChatEvent::MessagesUpdated {
673 old_range: deleted_message_ix..deleted_message_ix + 1,
674 new_count: 0,
675 });
676 }
677 }
678 }
679
680 fn message_update(
681 &mut self,
682 id: ChannelMessageId,
683 body: String,
684 mentions: Vec<(Range<usize>, u64)>,
685 edited_at: Option<OffsetDateTime>,
686 cx: &mut Context<Self>,
687 ) {
688 let mut cursor = self.messages.cursor::<ChannelMessageId>(&());
689 let mut messages = cursor.slice(&id, Bias::Left, &());
690 let ix = messages.summary().count;
691
692 if let Some(mut message_to_update) = cursor.item().cloned() {
693 message_to_update.body = body;
694 message_to_update.mentions = mentions;
695 message_to_update.edited_at = edited_at;
696 messages.push(message_to_update, &());
697 cursor.next(&());
698 }
699
700 messages.append(cursor.suffix(&()), &());
701 drop(cursor);
702 self.messages = messages;
703
704 cx.emit(ChannelChatEvent::UpdateMessage {
705 message_ix: ix,
706 message_id: id,
707 });
708
709 cx.notify();
710 }
711}
712
713async fn messages_from_proto(
714 proto_messages: Vec<proto::ChannelMessage>,
715 user_store: &Entity<UserStore>,
716 cx: &mut AsyncApp,
717) -> Result<SumTree<ChannelMessage>> {
718 let messages = ChannelMessage::from_proto_vec(proto_messages, user_store, cx).await?;
719 let mut result = SumTree::default();
720 result.extend(messages, &());
721 Ok(result)
722}
723
724impl ChannelMessage {
725 pub async fn from_proto(
726 message: proto::ChannelMessage,
727 user_store: &Entity<UserStore>,
728 cx: &mut AsyncApp,
729 ) -> Result<Self> {
730 let sender = user_store
731 .update(cx, |user_store, cx| {
732 user_store.get_user(message.sender_id, cx)
733 })?
734 .await?;
735
736 let edited_at = message.edited_at.and_then(|t| -> Option<OffsetDateTime> {
737 if let Ok(a) = OffsetDateTime::from_unix_timestamp(t as i64) {
738 return Some(a);
739 }
740
741 None
742 });
743
744 Ok(ChannelMessage {
745 id: ChannelMessageId::Saved(message.id),
746 body: message.body,
747 mentions: message
748 .mentions
749 .into_iter()
750 .filter_map(|mention| {
751 let range = mention.range?;
752 Some((range.start as usize..range.end as usize, mention.user_id))
753 })
754 .collect(),
755 timestamp: OffsetDateTime::from_unix_timestamp(message.timestamp as i64)?,
756 sender,
757 nonce: message
758 .nonce
759 .ok_or_else(|| anyhow!("nonce is required"))?
760 .into(),
761 reply_to_message_id: message.reply_to_message_id,
762 edited_at,
763 })
764 }
765
766 pub fn is_pending(&self) -> bool {
767 matches!(self.id, ChannelMessageId::Pending(_))
768 }
769
770 pub async fn from_proto_vec(
771 proto_messages: Vec<proto::ChannelMessage>,
772 user_store: &Entity<UserStore>,
773 cx: &mut AsyncApp,
774 ) -> Result<Vec<Self>> {
775 let unique_user_ids = proto_messages
776 .iter()
777 .map(|m| m.sender_id)
778 .collect::<HashSet<_>>()
779 .into_iter()
780 .collect();
781 user_store
782 .update(cx, |user_store, cx| {
783 user_store.get_users(unique_user_ids, cx)
784 })?
785 .await?;
786
787 let mut messages = Vec::with_capacity(proto_messages.len());
788 for message in proto_messages {
789 messages.push(ChannelMessage::from_proto(message, user_store, cx).await?);
790 }
791 Ok(messages)
792 }
793}
794
795pub fn mentions_to_proto(mentions: &[(Range<usize>, UserId)]) -> Vec<proto::ChatMention> {
796 mentions
797 .iter()
798 .map(|(range, user_id)| proto::ChatMention {
799 range: Some(proto::Range {
800 start: range.start as u64,
801 end: range.end as u64,
802 }),
803 user_id: *user_id,
804 })
805 .collect()
806}
807
808impl sum_tree::Item for ChannelMessage {
809 type Summary = ChannelMessageSummary;
810
811 fn summary(&self, _cx: &()) -> Self::Summary {
812 ChannelMessageSummary {
813 max_id: self.id,
814 count: 1,
815 }
816 }
817}
818
819impl Default for ChannelMessageId {
820 fn default() -> Self {
821 Self::Saved(0)
822 }
823}
824
825impl sum_tree::Summary for ChannelMessageSummary {
826 type Context = ();
827
828 fn zero(_cx: &Self::Context) -> Self {
829 Default::default()
830 }
831
832 fn add_summary(&mut self, summary: &Self, _: &()) {
833 self.max_id = summary.max_id;
834 self.count += summary.count;
835 }
836}
837
838impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for ChannelMessageId {
839 fn zero(_cx: &()) -> Self {
840 Default::default()
841 }
842
843 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
844 debug_assert!(summary.max_id > *self);
845 *self = summary.max_id;
846 }
847}
848
849impl<'a> sum_tree::Dimension<'a, ChannelMessageSummary> for Count {
850 fn zero(_cx: &()) -> Self {
851 Default::default()
852 }
853
854 fn add_summary(&mut self, summary: &'a ChannelMessageSummary, _: &()) {
855 self.0 += summary.count;
856 }
857}
858
859impl<'a> From<&'a str> for MessageParams {
860 fn from(value: &'a str) -> Self {
861 Self {
862 text: value.into(),
863 mentions: Vec::new(),
864 reply_to_message_id: None,
865 }
866 }
867}