Threaded notifications (#4644)

* implemented grouping

* implemented presenting the thread

* improved the implementation by reusing the presentation action

* add Thread group to DMs to differentiate from non threaded messages of the same DM

* name for a threaded notification in group room

* focus event when tapping on a notification

* pr suggestions

* document

ElementX/Sources/Services/Notification/NotificationConstants.swift

@@ -12,6 +12,7 @@ enum NotificationConstants {
     enum UserInfoKey {
         static let roomIdentifier = "room_id"
         static let eventIdentifier = "event_id"
+        static let threadRootEventIdentifier = "thread_root_event_id"
         static let unreadCount = "unread_count"
         static let pusherNotificationClientIdentifier = "pusher_notification_client_identifier"
         static let receiverIdentifier = "receiver_id"

ElementX/Sources/Services/Notification/Proxy/NotificationItemProxy.swift

@@ -77,6 +77,10 @@ struct NotificationItemProxy: NotificationItemProxyProtocol {
         }
         return nil
     }
+    
+    var threadRootEventID: String? {
+        notificationItem.threadId
+    }
 }
 
 struct EmptyNotificationItemProxy: NotificationItemProxyProtocol {
@@ -109,4 +113,6 @@ struct EmptyNotificationItemProxy: NotificationItemProxyProtocol {
     var roomJoinedMembers: Int { 0 }
     
     var hasMention: Bool { false }
+    
+    var threadRootEventID: String? { nil }
 }

ElementX/Sources/Services/Notification/Proxy/NotificationItemProxyProtocol.swift

@@ -36,6 +36,8 @@ protocol NotificationItemProxyProtocol {
     var isNoisy: Bool { get }
 
     var hasMention: Bool { get }
+    
+    var threadRootEventID: String? { get }
 }
 
 extension NotificationItemProxyProtocol {