MM-38093: updates notifications copy on CRT replies (#18332)

MM-38093: updates notifications copy on CRT replies

Updates texts form push and email notifications when the user has CRT "on"
and the post is a reply to a thread.

Email batches text aware of CRT threads

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/email/email_batching.go

@@ -225,6 +225,16 @@ func (es *Service) sendBatchedEmailNotification(userID string, notifications []*
 		emailNotificationContentsType = *es.config().EmailSettings.EmailNotificationContentsType
 	}
 
+	// check if user has CRT set to ON
+	threadsEnabled := false
+	if *es.config().ServiceSettings.CollapsedThreads != model.CollapsedThreadsDisabled {
+		threadsEnabled = *es.config().ServiceSettings.CollapsedThreads == model.CollapsedThreadsDefaultOn
+		// check if a participant has overridden collapsed threads settings
+		if preference, errCrt := es.store.Preference().Get(userID, model.PreferenceCategoryDisplaySettings, model.PreferenceNameCollapsedThreadsEnabled); errCrt == nil {
+			threadsEnabled = preference.Value == "on"
+		}
+	}
+
 	if emailNotificationContentsType == model.EmailNotificationContentsFull {
 		for i, notification := range notifications {
 			sender, errSender := es.userService.GetUser(notification.post.UserId)
@@ -261,11 +271,20 @@ func (es *Service) sendBatchedEmailNotification(userID string, notifications []*
 
 			MessageURL := siteURL + "/" + notification.teamName + "/pl/" + notification.post.Id
 
+			channelName := channel.DisplayName
+			if threadsEnabled && notification.post.RootId != "" {
+				props := map[string]interface{}{"channelName": channelName}
+				channelName = translateFunc("api.push_notification.title.collapsed_threads", props)
+				if channel.Type == model.ChannelTypeDirect {
+					channelName = translateFunc("api.push_notification.title.collapsed_threads_dm")
+				}
+			}
+
 			postsData = append(postsData, &postData{
 				SenderPhoto: senderPhoto,
 				SenderName:  sender.GetDisplayName(displayNameFormat),
 				Time:        t,
-				ChannelName: channel.DisplayName,
+				ChannelName: channelName,
 				Message:     template.HTML(es.GetMessageForNotification(notification.post, translateFunc)),
 				MessageURL:  MessageURL,
 			})