1use super::*;
2use rpc::Notification;
3use sea_orm::{SelectColumns, TryInsertResult};
4use time::OffsetDateTime;
5use util::ResultExt;
6
7impl Database {
8 /// Inserts a record representing a user joining the chat for a given channel.
9 pub async fn join_channel_chat(
10 &self,
11 channel_id: ChannelId,
12 connection_id: ConnectionId,
13 user_id: UserId,
14 ) -> Result<()> {
15 self.transaction(|tx| async move {
16 let channel = self.get_channel_internal(channel_id, &tx).await?;
17 self.check_user_is_channel_participant(&channel, user_id, &tx)
18 .await?;
19 channel_chat_participant::ActiveModel {
20 id: ActiveValue::NotSet,
21 channel_id: ActiveValue::Set(channel_id),
22 user_id: ActiveValue::Set(user_id),
23 connection_id: ActiveValue::Set(connection_id.id as i32),
24 connection_server_id: ActiveValue::Set(ServerId(connection_id.owner_id as i32)),
25 }
26 .insert(&*tx)
27 .await?;
28 Ok(())
29 })
30 .await
31 }
32
33 /// Removes `channel_chat_participant` records associated with the given connection ID.
34 pub async fn channel_chat_connection_lost(
35 &self,
36 connection_id: ConnectionId,
37 tx: &DatabaseTransaction,
38 ) -> Result<()> {
39 channel_chat_participant::Entity::delete_many()
40 .filter(
41 Condition::all()
42 .add(
43 channel_chat_participant::Column::ConnectionServerId
44 .eq(connection_id.owner_id),
45 )
46 .add(channel_chat_participant::Column::ConnectionId.eq(connection_id.id)),
47 )
48 .exec(tx)
49 .await?;
50 Ok(())
51 }
52
53 /// Removes `channel_chat_participant` records associated with the given user ID so they
54 /// will no longer get chat notifications.
55 pub async fn leave_channel_chat(
56 &self,
57 channel_id: ChannelId,
58 connection_id: ConnectionId,
59 _user_id: UserId,
60 ) -> Result<()> {
61 self.transaction(|tx| async move {
62 channel_chat_participant::Entity::delete_many()
63 .filter(
64 Condition::all()
65 .add(
66 channel_chat_participant::Column::ConnectionServerId
67 .eq(connection_id.owner_id),
68 )
69 .add(channel_chat_participant::Column::ConnectionId.eq(connection_id.id))
70 .add(channel_chat_participant::Column::ChannelId.eq(channel_id)),
71 )
72 .exec(&*tx)
73 .await?;
74
75 Ok(())
76 })
77 .await
78 }
79
80 /// Retrieves the messages in the specified channel.
81 ///
82 /// Use `before_message_id` to paginate through the channel's messages.
83 pub async fn get_channel_messages(
84 &self,
85 channel_id: ChannelId,
86 user_id: UserId,
87 count: usize,
88 before_message_id: Option<MessageId>,
89 ) -> Result<Vec<proto::ChannelMessage>> {
90 self.transaction(|tx| async move {
91 let channel = self.get_channel_internal(channel_id, &tx).await?;
92 self.check_user_is_channel_participant(&channel, user_id, &tx)
93 .await?;
94
95 let mut condition =
96 Condition::all().add(channel_message::Column::ChannelId.eq(channel_id));
97
98 if let Some(before_message_id) = before_message_id {
99 condition = condition.add(channel_message::Column::Id.lt(before_message_id));
100 }
101
102 let rows = channel_message::Entity::find()
103 .filter(condition)
104 .order_by_desc(channel_message::Column::Id)
105 .limit(count as u64)
106 .all(&*tx)
107 .await?;
108
109 self.load_channel_messages(rows, &tx).await
110 })
111 .await
112 }
113
114 /// Returns the channel messages with the given IDs.
115 pub async fn get_channel_messages_by_id(
116 &self,
117 user_id: UserId,
118 message_ids: &[MessageId],
119 ) -> Result<Vec<proto::ChannelMessage>> {
120 self.transaction(|tx| async move {
121 let rows = channel_message::Entity::find()
122 .filter(channel_message::Column::Id.is_in(message_ids.iter().copied()))
123 .order_by_desc(channel_message::Column::Id)
124 .all(&*tx)
125 .await?;
126
127 let mut channels = HashMap::<ChannelId, channel::Model>::default();
128 for row in &rows {
129 channels.insert(
130 row.channel_id,
131 self.get_channel_internal(row.channel_id, &tx).await?,
132 );
133 }
134
135 for (_, channel) in channels {
136 self.check_user_is_channel_participant(&channel, user_id, &tx)
137 .await?;
138 }
139
140 let messages = self.load_channel_messages(rows, &tx).await?;
141 Ok(messages)
142 })
143 .await
144 }
145
146 async fn load_channel_messages(
147 &self,
148 rows: Vec<channel_message::Model>,
149 tx: &DatabaseTransaction,
150 ) -> Result<Vec<proto::ChannelMessage>> {
151 let mut messages = rows
152 .into_iter()
153 .map(|row| {
154 let nonce = row.nonce.as_u64_pair();
155 proto::ChannelMessage {
156 id: row.id.to_proto(),
157 sender_id: row.sender_id.to_proto(),
158 body: row.body,
159 timestamp: row.sent_at.assume_utc().unix_timestamp() as u64,
160 mentions: vec![],
161 nonce: Some(proto::Nonce {
162 upper_half: nonce.0,
163 lower_half: nonce.1,
164 }),
165 reply_to_message_id: row.reply_to_message_id.map(|id| id.to_proto()),
166 edited_at: row
167 .edited_at
168 .map(|t| t.assume_utc().unix_timestamp() as u64),
169 }
170 })
171 .collect::<Vec<_>>();
172 messages.reverse();
173
174 let mut mentions = channel_message_mention::Entity::find()
175 .filter(channel_message_mention::Column::MessageId.is_in(messages.iter().map(|m| m.id)))
176 .order_by_asc(channel_message_mention::Column::MessageId)
177 .order_by_asc(channel_message_mention::Column::StartOffset)
178 .stream(tx)
179 .await?;
180
181 let mut message_ix = 0;
182 while let Some(mention) = mentions.next().await {
183 let mention = mention?;
184 let message_id = mention.message_id.to_proto();
185 while let Some(message) = messages.get_mut(message_ix) {
186 if message.id < message_id {
187 message_ix += 1;
188 } else {
189 if message.id == message_id {
190 message.mentions.push(proto::ChatMention {
191 range: Some(proto::Range {
192 start: mention.start_offset as u64,
193 end: mention.end_offset as u64,
194 }),
195 user_id: mention.user_id.to_proto(),
196 });
197 }
198 break;
199 }
200 }
201 }
202
203 Ok(messages)
204 }
205
206 fn format_mentions_to_entities(
207 &self,
208 message_id: MessageId,
209 body: &str,
210 mentions: &[proto::ChatMention],
211 ) -> Result<Vec<tables::channel_message_mention::ActiveModel>> {
212 Ok(mentions
213 .iter()
214 .filter_map(|mention| {
215 let range = mention.range.as_ref()?;
216 if !body.is_char_boundary(range.start as usize)
217 || !body.is_char_boundary(range.end as usize)
218 {
219 return None;
220 }
221 Some(channel_message_mention::ActiveModel {
222 message_id: ActiveValue::Set(message_id),
223 start_offset: ActiveValue::Set(range.start as i32),
224 end_offset: ActiveValue::Set(range.end as i32),
225 user_id: ActiveValue::Set(UserId::from_proto(mention.user_id)),
226 })
227 })
228 .collect::<Vec<_>>())
229 }
230
231 /// Creates a new channel message.
232 pub async fn create_channel_message(
233 &self,
234 channel_id: ChannelId,
235 user_id: UserId,
236 body: &str,
237 mentions: &[proto::ChatMention],
238 timestamp: OffsetDateTime,
239 nonce: u128,
240 reply_to_message_id: Option<MessageId>,
241 ) -> Result<CreatedChannelMessage> {
242 self.transaction(|tx| async move {
243 let channel = self.get_channel_internal(channel_id, &tx).await?;
244 self.check_user_is_channel_participant(&channel, user_id, &tx)
245 .await?;
246
247 let mut rows = channel_chat_participant::Entity::find()
248 .filter(channel_chat_participant::Column::ChannelId.eq(channel_id))
249 .stream(&*tx)
250 .await?;
251
252 let mut is_participant = false;
253 let mut participant_connection_ids = HashSet::default();
254 let mut participant_user_ids = Vec::new();
255 while let Some(row) = rows.next().await {
256 let row = row?;
257 if row.user_id == user_id {
258 is_participant = true;
259 }
260 participant_user_ids.push(row.user_id);
261 participant_connection_ids.insert(row.connection());
262 }
263 drop(rows);
264
265 if !is_participant {
266 Err(anyhow!("not a chat participant"))?;
267 }
268
269 let timestamp = timestamp.to_offset(time::UtcOffset::UTC);
270 let timestamp = time::PrimitiveDateTime::new(timestamp.date(), timestamp.time());
271
272 let result = channel_message::Entity::insert(channel_message::ActiveModel {
273 channel_id: ActiveValue::Set(channel_id),
274 sender_id: ActiveValue::Set(user_id),
275 body: ActiveValue::Set(body.to_string()),
276 sent_at: ActiveValue::Set(timestamp),
277 nonce: ActiveValue::Set(Uuid::from_u128(nonce)),
278 id: ActiveValue::NotSet,
279 reply_to_message_id: ActiveValue::Set(reply_to_message_id),
280 edited_at: ActiveValue::NotSet,
281 })
282 .on_conflict(
283 OnConflict::columns([
284 channel_message::Column::SenderId,
285 channel_message::Column::Nonce,
286 ])
287 .do_nothing()
288 .to_owned(),
289 )
290 .do_nothing()
291 .exec(&*tx)
292 .await?;
293
294 let message_id;
295 let mut notifications = Vec::new();
296 match result {
297 TryInsertResult::Inserted(result) => {
298 message_id = result.last_insert_id;
299 let mentioned_user_ids =
300 mentions.iter().map(|m| m.user_id).collect::<HashSet<_>>();
301
302 let mentions = self.format_mentions_to_entities(message_id, body, mentions)?;
303 if !mentions.is_empty() {
304 channel_message_mention::Entity::insert_many(mentions)
305 .exec(&*tx)
306 .await?;
307 }
308
309 for mentioned_user in mentioned_user_ids {
310 notifications.extend(
311 self.create_notification(
312 UserId::from_proto(mentioned_user),
313 rpc::Notification::ChannelMessageMention {
314 message_id: message_id.to_proto(),
315 sender_id: user_id.to_proto(),
316 channel_id: channel_id.to_proto(),
317 },
318 false,
319 &tx,
320 )
321 .await?,
322 );
323 }
324
325 self.observe_channel_message_internal(channel_id, user_id, message_id, &tx)
326 .await?;
327 }
328 _ => {
329 message_id = channel_message::Entity::find()
330 .filter(channel_message::Column::Nonce.eq(Uuid::from_u128(nonce)))
331 .one(&*tx)
332 .await?
333 .ok_or_else(|| anyhow!("failed to insert message"))?
334 .id;
335 }
336 }
337
338 Ok(CreatedChannelMessage {
339 message_id,
340 participant_connection_ids,
341 notifications,
342 })
343 })
344 .await
345 }
346
347 pub async fn observe_channel_message(
348 &self,
349 channel_id: ChannelId,
350 user_id: UserId,
351 message_id: MessageId,
352 ) -> Result<NotificationBatch> {
353 self.transaction(|tx| async move {
354 self.observe_channel_message_internal(channel_id, user_id, message_id, &tx)
355 .await?;
356 let mut batch = NotificationBatch::default();
357 batch.extend(
358 self.mark_notification_as_read(
359 user_id,
360 &Notification::ChannelMessageMention {
361 message_id: message_id.to_proto(),
362 sender_id: Default::default(),
363 channel_id: Default::default(),
364 },
365 &tx,
366 )
367 .await?,
368 );
369 Ok(batch)
370 })
371 .await
372 }
373
374 async fn observe_channel_message_internal(
375 &self,
376 channel_id: ChannelId,
377 user_id: UserId,
378 message_id: MessageId,
379 tx: &DatabaseTransaction,
380 ) -> Result<()> {
381 observed_channel_messages::Entity::insert(observed_channel_messages::ActiveModel {
382 user_id: ActiveValue::Set(user_id),
383 channel_id: ActiveValue::Set(channel_id),
384 channel_message_id: ActiveValue::Set(message_id),
385 })
386 .on_conflict(
387 OnConflict::columns([
388 observed_channel_messages::Column::ChannelId,
389 observed_channel_messages::Column::UserId,
390 ])
391 .update_column(observed_channel_messages::Column::ChannelMessageId)
392 .action_cond_where(observed_channel_messages::Column::ChannelMessageId.lt(message_id))
393 .to_owned(),
394 )
395 // TODO: Try to upgrade SeaORM so we don't have to do this hack around their bug
396 .exec_without_returning(tx)
397 .await?;
398 Ok(())
399 }
400
401 pub async fn observed_channel_messages(
402 &self,
403 channel_ids: &[ChannelId],
404 user_id: UserId,
405 tx: &DatabaseTransaction,
406 ) -> Result<Vec<proto::ChannelMessageId>> {
407 let rows = observed_channel_messages::Entity::find()
408 .filter(observed_channel_messages::Column::UserId.eq(user_id))
409 .filter(
410 observed_channel_messages::Column::ChannelId
411 .is_in(channel_ids.iter().map(|id| id.0)),
412 )
413 .all(tx)
414 .await?;
415
416 Ok(rows
417 .into_iter()
418 .map(|message| proto::ChannelMessageId {
419 channel_id: message.channel_id.to_proto(),
420 message_id: message.channel_message_id.to_proto(),
421 })
422 .collect())
423 }
424
425 pub async fn latest_channel_messages(
426 &self,
427 channel_ids: &[ChannelId],
428 tx: &DatabaseTransaction,
429 ) -> Result<Vec<proto::ChannelMessageId>> {
430 let mut values = String::new();
431 for id in channel_ids {
432 if !values.is_empty() {
433 values.push_str(", ");
434 }
435 write!(&mut values, "({})", id).unwrap();
436 }
437
438 if values.is_empty() {
439 return Ok(Vec::default());
440 }
441
442 let sql = format!(
443 r#"
444 SELECT
445 *
446 FROM (
447 SELECT
448 *,
449 row_number() OVER (
450 PARTITION BY channel_id
451 ORDER BY id DESC
452 ) as row_number
453 FROM channel_messages
454 WHERE
455 channel_id in ({values})
456 ) AS messages
457 WHERE
458 row_number = 1
459 "#,
460 );
461
462 let stmt = Statement::from_string(self.pool.get_database_backend(), sql);
463 let mut last_messages = channel_message::Model::find_by_statement(stmt)
464 .stream(tx)
465 .await?;
466
467 let mut results = Vec::new();
468 while let Some(result) = last_messages.next().await {
469 let message = result?;
470 results.push(proto::ChannelMessageId {
471 channel_id: message.channel_id.to_proto(),
472 message_id: message.id.to_proto(),
473 });
474 }
475
476 Ok(results)
477 }
478
479 fn get_notification_kind_id_by_name(&self, notification_kind: &str) -> Option<i32> {
480 self.notification_kinds_by_id
481 .iter()
482 .find(|(_, kind)| **kind == notification_kind)
483 .map(|kind| kind.0.0)
484 }
485
486 /// Removes the channel message with the given ID.
487 pub async fn remove_channel_message(
488 &self,
489 channel_id: ChannelId,
490 message_id: MessageId,
491 user_id: UserId,
492 ) -> Result<(Vec<ConnectionId>, Vec<NotificationId>)> {
493 self.transaction(|tx| async move {
494 let mut rows = channel_chat_participant::Entity::find()
495 .filter(channel_chat_participant::Column::ChannelId.eq(channel_id))
496 .stream(&*tx)
497 .await?;
498
499 let mut is_participant = false;
500 let mut participant_connection_ids = Vec::new();
501 while let Some(row) = rows.next().await {
502 let row = row?;
503 if row.user_id == user_id {
504 is_participant = true;
505 }
506 participant_connection_ids.push(row.connection());
507 }
508 drop(rows);
509
510 if !is_participant {
511 Err(anyhow!("not a chat participant"))?;
512 }
513
514 let result = channel_message::Entity::delete_by_id(message_id)
515 .filter(channel_message::Column::SenderId.eq(user_id))
516 .exec(&*tx)
517 .await?;
518
519 if result.rows_affected == 0 {
520 let channel = self.get_channel_internal(channel_id, &tx).await?;
521 if self
522 .check_user_is_channel_admin(&channel, user_id, &tx)
523 .await
524 .is_ok()
525 {
526 let result = channel_message::Entity::delete_by_id(message_id)
527 .exec(&*tx)
528 .await?;
529 if result.rows_affected == 0 {
530 Err(anyhow!("no such message"))?;
531 }
532 } else {
533 Err(anyhow!("operation could not be completed"))?;
534 }
535 }
536
537 let notification_kind_id =
538 self.get_notification_kind_id_by_name("ChannelMessageMention");
539
540 let existing_notifications = notification::Entity::find()
541 .filter(notification::Column::EntityId.eq(message_id))
542 .filter(notification::Column::Kind.eq(notification_kind_id))
543 .select_column(notification::Column::Id)
544 .all(&*tx)
545 .await?;
546
547 let existing_notification_ids = existing_notifications
548 .into_iter()
549 .map(|notification| notification.id)
550 .collect();
551
552 // remove all the mention notifications for this message
553 notification::Entity::delete_many()
554 .filter(notification::Column::EntityId.eq(message_id))
555 .filter(notification::Column::Kind.eq(notification_kind_id))
556 .exec(&*tx)
557 .await?;
558
559 Ok((participant_connection_ids, existing_notification_ids))
560 })
561 .await
562 }
563
564 /// Updates the channel message with the given ID, body and timestamp(edited_at).
565 pub async fn update_channel_message(
566 &self,
567 channel_id: ChannelId,
568 message_id: MessageId,
569 user_id: UserId,
570 body: &str,
571 mentions: &[proto::ChatMention],
572 edited_at: OffsetDateTime,
573 ) -> Result<UpdatedChannelMessage> {
574 self.transaction(|tx| async move {
575 let channel = self.get_channel_internal(channel_id, &tx).await?;
576 self.check_user_is_channel_participant(&channel, user_id, &tx)
577 .await?;
578
579 let mut rows = channel_chat_participant::Entity::find()
580 .filter(channel_chat_participant::Column::ChannelId.eq(channel_id))
581 .stream(&*tx)
582 .await?;
583
584 let mut is_participant = false;
585 let mut participant_connection_ids = Vec::new();
586 let mut participant_user_ids = Vec::new();
587 while let Some(row) = rows.next().await {
588 let row = row?;
589 if row.user_id == user_id {
590 is_participant = true;
591 }
592 participant_user_ids.push(row.user_id);
593 participant_connection_ids.push(row.connection());
594 }
595 drop(rows);
596
597 if !is_participant {
598 Err(anyhow!("not a chat participant"))?;
599 }
600
601 let channel_message = channel_message::Entity::find_by_id(message_id)
602 .filter(channel_message::Column::SenderId.eq(user_id))
603 .one(&*tx)
604 .await?;
605
606 let Some(channel_message) = channel_message else {
607 Err(anyhow!("Channel message not found"))?
608 };
609
610 let edited_at = edited_at.to_offset(time::UtcOffset::UTC);
611 let edited_at = time::PrimitiveDateTime::new(edited_at.date(), edited_at.time());
612
613 let updated_message = channel_message::ActiveModel {
614 body: ActiveValue::Set(body.to_string()),
615 edited_at: ActiveValue::Set(Some(edited_at)),
616 reply_to_message_id: ActiveValue::Unchanged(channel_message.reply_to_message_id),
617 id: ActiveValue::Unchanged(message_id),
618 channel_id: ActiveValue::Unchanged(channel_id),
619 sender_id: ActiveValue::Unchanged(user_id),
620 sent_at: ActiveValue::Unchanged(channel_message.sent_at),
621 nonce: ActiveValue::Unchanged(channel_message.nonce),
622 };
623
624 let result = channel_message::Entity::update_many()
625 .set(updated_message)
626 .filter(channel_message::Column::Id.eq(message_id))
627 .filter(channel_message::Column::SenderId.eq(user_id))
628 .exec(&*tx)
629 .await?;
630 if result.rows_affected == 0 {
631 return Err(anyhow!(
632 "Attempted to edit a message (id: {message_id}) which does not exist anymore."
633 ))?;
634 }
635
636 // we have to fetch the old mentions,
637 // so we don't send a notification when the message has been edited that you are mentioned in
638 let old_mentions = channel_message_mention::Entity::find()
639 .filter(channel_message_mention::Column::MessageId.eq(message_id))
640 .all(&*tx)
641 .await?;
642
643 // remove all existing mentions
644 channel_message_mention::Entity::delete_many()
645 .filter(channel_message_mention::Column::MessageId.eq(message_id))
646 .exec(&*tx)
647 .await?;
648
649 let new_mentions = self.format_mentions_to_entities(message_id, body, mentions)?;
650 if !new_mentions.is_empty() {
651 // insert new mentions
652 channel_message_mention::Entity::insert_many(new_mentions)
653 .exec(&*tx)
654 .await?;
655 }
656
657 let mut update_mention_user_ids = HashSet::default();
658 let mut new_mention_user_ids =
659 mentions.iter().map(|m| m.user_id).collect::<HashSet<_>>();
660 // Filter out users that were mentioned before
661 for mention in &old_mentions {
662 if new_mention_user_ids.contains(&mention.user_id.to_proto()) {
663 update_mention_user_ids.insert(mention.user_id.to_proto());
664 }
665
666 new_mention_user_ids.remove(&mention.user_id.to_proto());
667 }
668
669 let notification_kind_id =
670 self.get_notification_kind_id_by_name("ChannelMessageMention");
671
672 let existing_notifications = notification::Entity::find()
673 .filter(notification::Column::EntityId.eq(message_id))
674 .filter(notification::Column::Kind.eq(notification_kind_id))
675 .all(&*tx)
676 .await?;
677
678 // determine which notifications should be updated or deleted
679 let mut deleted_notification_ids = HashSet::default();
680 let mut updated_mention_notifications = Vec::new();
681 for notification in existing_notifications {
682 if update_mention_user_ids.contains(¬ification.recipient_id.to_proto()) {
683 if let Some(notification) =
684 self::notifications::model_to_proto(self, notification).log_err()
685 {
686 updated_mention_notifications.push(notification);
687 }
688 } else {
689 deleted_notification_ids.insert(notification.id);
690 }
691 }
692
693 let mut notifications = Vec::new();
694 for mentioned_user in new_mention_user_ids {
695 notifications.extend(
696 self.create_notification(
697 UserId::from_proto(mentioned_user),
698 rpc::Notification::ChannelMessageMention {
699 message_id: message_id.to_proto(),
700 sender_id: user_id.to_proto(),
701 channel_id: channel_id.to_proto(),
702 },
703 false,
704 &tx,
705 )
706 .await?,
707 );
708 }
709
710 Ok(UpdatedChannelMessage {
711 message_id,
712 participant_connection_ids,
713 notifications,
714 reply_to_message_id: channel_message.reply_to_message_id,
715 timestamp: channel_message.sent_at,
716 deleted_mention_notification_ids: deleted_notification_ids
717 .into_iter()
718 .collect::<Vec<_>>(),
719 updated_mention_notifications,
720 })
721 })
722 .await
723 }
724}