MM-37934: supports channel override for CRT notifications (#18529)

* MM-37934: supports channel override for CRT notifications

Users with CRT 'ON' are enabled to override global CRT notification
settings per channel basis.

* Fixes brain freeze :o

* Fix push notification for CRT

* Some refactor and comments as per review comments

* Minor refactor

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

app/channel.go

@@ -1202,6 +1202,10 @@ func (a *App) UpdateChannelMemberNotifyProps(data map[string]string, channelID s
 		filteredProps[model.DesktopNotifyProp] = desktop
 	}
 
+	if desktop_threads, exists := data[model.DesktopThreadsNotifyProp]; exists {
+		filteredProps[model.DesktopThreadsNotifyProp] = desktop_threads
+	}
+
 	if email, exists := data[model.EmailNotifyProp]; exists {
 		filteredProps[model.EmailNotifyProp] = email
 	}
@@ -1210,6 +1214,10 @@ func (a *App) UpdateChannelMemberNotifyProps(data map[string]string, channelID s
 		filteredProps[model.PushNotifyProp] = push
 	}
 
+	if push_threads, exists := data[model.PushThreadsNotifyProp]; exists {
+		filteredProps[model.PushThreadsNotifyProp] = push_threads
+	}
+
 	if ignoreChannelMentions, exists := data[model.IgnoreChannelMentionsNotifyProp]; exists {
 		filteredProps[model.IgnoreChannelMentionsNotifyProp] = ignoreChannelMentions
 	}

app/notification.go

@@ -329,7 +329,7 @@ func (a *App) SendNotifications(post *model.Post, team *model.Team, channel *mod
 			}
 
 			// add user id to notificationsForCRT depending on threads notify props
-			notificationsForCRT.addUserToNotify(profile, mentions)
+			notificationsForCRT.addFollowerToNotify(profile, mentions, channelMemberNotifyPropsMap[profile.Id], channel)
 		}
 	}
 
@@ -1338,28 +1338,85 @@ type CRTNotifiers struct {
 	Push model.StringArray
 }
 
-func (c *CRTNotifiers) addUserToNotify(user *model.User, mentions *ExplicitMentions) {
+func (c *CRTNotifiers) addFollowerToNotify(user *model.User, mentions *ExplicitMentions, channelMemberNotificationProps model.StringMap, channel *model.Channel) {
-	// user notify props
+	_, userWasMentioned := mentions.Mentions[user.Id]
+	notifyDesktop, notifyPush, notifyEmail := shouldUserNotifyCRT(user, userWasMentioned)
+	notifyChannelDesktop, notifyChannelPush := shouldChannelMemberNotifyCRT(channelMemberNotificationProps, userWasMentioned)
+
+	// respect the user global notify props when there are no channel specific ones (default)
+	// otherwise respect the channel member's notify props
+	if (channelMemberNotificationProps[model.DesktopNotifyProp] == model.ChannelNotifyDefault && notifyDesktop) || notifyChannelDesktop {
+		c.Desktop = append(c.Desktop, user.Id)
+	}
+
+	if notifyEmail {
+		c.Email = append(c.Email, user.Id)
+	}
+
+	// respect the user global notify props when there are no channel specific ones (default)
+	// otherwise respect the channel member's notify props
+	if (channelMemberNotificationProps[model.PushNotifyProp] == model.ChannelNotifyDefault && notifyPush) || notifyChannelPush {
+		c.Push = append(c.Push, user.Id)
+	}
+}
+
+// user global settings check for desktop, email, and push notifications
+func shouldUserNotifyCRT(user *model.User, isMentioned bool) (notifyDesktop, notifyPush, notifyEmail bool) {
+	notifyDesktop = false
+	notifyPush = false
+	notifyEmail = false
+
 	desktop := user.NotifyProps[model.DesktopNotifyProp]
 	push := user.NotifyProps[model.PushNotifyProp]
 	shouldEmail := user.NotifyProps[model.EmailNotifyProp] == "true"
 
-	// user thread notify props
 	desktopThreads := user.NotifyProps[model.DesktopThreadsNotifyProp]
 	emailThreads := user.NotifyProps[model.EmailThreadsNotifyProp]
 	pushThreads := user.NotifyProps[model.PushThreadsNotifyProp]
 
-	_, userWasMentioned := mentions.Mentions[user.Id]
+	// user should be notified via desktop notification in the case the notify prop is not set as no notify
-
+	// and either the user was mentioned or the CRT notify prop for desktop is set to all
-	if desktop != model.UserNotifyNone && (userWasMentioned || desktopThreads == model.UserNotifyAll || desktop == model.UserNotifyAll) {
+	if desktop != model.UserNotifyNone && (isMentioned || desktopThreads == model.UserNotifyAll || desktop == model.UserNotifyAll) {
-		c.Desktop = append(c.Desktop, user.Id)
+		notifyDesktop = true
 	}
 
-	if shouldEmail && (userWasMentioned || emailThreads == model.UserNotifyAll) {
+	// user should be notified via email when emailing is enabled and
-		c.Email = append(c.Email, user.Id)
+	// either the user was mentioned, or the CRT notify prop for email is set to all
+	if shouldEmail && (isMentioned || emailThreads == model.UserNotifyAll) {
+		notifyEmail = true
 	}
 
-	if push != model.UserNotifyNone && (userWasMentioned || pushThreads == model.UserNotifyAll || push == model.UserNotifyAll) {
+	// user should be notified via push in the case the notify prop is not set as no notify
-		c.Push = append(c.Push, user.Id)
+	// and either the user was mentioned or the CRT push notify prop is set to all
+	if push != model.UserNotifyNone && (isMentioned || pushThreads == model.UserNotifyAll || push == model.UserNotifyAll) {
+		notifyPush = true
 	}
+
+	return
+}
+
+// channel specific settings check for desktop and push notifications
+func shouldChannelMemberNotifyCRT(notifyProps model.StringMap, isMentioned bool) (notifyDesktop, notifyPush bool) {
+	notifyDesktop = false
+	notifyPush = false
+
+	desktop := notifyProps[model.DesktopNotifyProp]
+	push := notifyProps[model.PushNotifyProp]
+
+	desktopThreads := notifyProps[model.DesktopThreadsNotifyProp]
+	pushThreads := notifyProps[model.PushThreadsNotifyProp]
+
+	// user should be notified via desktop notification in the case the notify prop is not set as no notify or default
+	// and either the user was mentioned or the CRT notify prop for desktop is set to all
+	if desktop != model.ChannelNotifyDefault && desktop != model.ChannelNotifyNone && (isMentioned || desktopThreads == model.ChannelNotifyAll || desktop == model.ChannelNotifyAll) {
+		notifyDesktop = true
+	}
+
+	// user should be notified via push in the case the notify prop is not set as no notify or default
+	// and either the user was mentioned or the CRT push notify prop is set to all
+	if push != model.ChannelNotifyDefault && push != model.ChannelNotifyNone && (isMentioned || pushThreads == model.ChannelNotifyAll || push == model.ChannelNotifyAll) {
+		notifyPush = true
+	}
+
+	return
 }