Only display unread notification once in call

Only show one notification for unread messages, either for new messages
or for mentions.
When switching from "new messages" to "you have been mentionned",
discard the former notification.

Signed-off-by: Vincent Petry <vincent@nextcloud.com>

src/components/TopBar/TopBar.vue

@@ -198,6 +198,12 @@ export default {
 		},
 	},
 
+	data: () => {
+		return {
+			unreadNotificationHandle: null,
+		}
+	},
+
 	computed: {
 		isFullscreen() {
 			return this.$store.getters.isFullscreen()
@@ -319,8 +325,8 @@ export default {
 			}
 
 			// new messages arrived
-			if (newValue > 0 && oldValue === 0) {
-				showMessage(t('spreed', 'You have new unread messages in the chat.'))
+			if (newValue > 0 && oldValue === 0 && !this.hasUnreadMentions) {
+				this.notifyUnreadMessages(t('spreed', 'You have new unread messages in the chat.'))
 			}
 		},
 
@@ -329,9 +335,15 @@ export default {
 				return
 			}
 
-			// prevent duplicate notification caused by unreadMessagesCounter in case of mention
-			if (newValue && this.unreadMessagesCounter > 0) {
-				showMessage(t('spreed', 'You have been mentioned in the chat.'))
+			if (newValue) {
+				this.notifyUnreadMessages(t('spreed', 'You have been mentioned in the chat.'))
+			}
+		},
+
+		isInCall(newValue) {
+			if (!newValue) {
+				// discard notification if the call ends
+				this.notifyUnreadMessages(null)
 			}
 		},
 	},
@@ -344,6 +356,7 @@ export default {
 	},
 
 	beforeDestroy() {
+		this.notifyUnreadMessages(null)
 		document.removeEventListener('fullscreenchange', this.fullScreenChanged, false)
 		document.removeEventListener('mozfullscreenchange', this.fullScreenChanged, false)
 		document.removeEventListener('MSFullscreenChange', this.fullScreenChanged, false)
@@ -351,6 +364,16 @@ export default {
 	},
 
 	methods: {
+		notifyUnreadMessages(message) {
+			if (this.unreadNotificationHandle) {
+				this.unreadNotificationHandle.hideToast()
+				this.unreadNotificationHandle = null
+			}
+			if (message) {
+				this.unreadNotificationHandle = showMessage(message)
+			}
+		},
+
 		openSidebar() {
 			this.$store.dispatch('showSidebar')
 			BrowserStorage.setItem('sidebarOpen', 'true')