Move SwiftUI version of ViewModel to a subclass

Riot/Modules/Room/NotificationSettings/RoomNotificationSettingsSwiftUIViewModel.swift

@@ -0,0 +1,37 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import SwiftUI
+import Combine
+
+@available(iOS 14.0, *)
+class RoomNotificationSettingsSwiftUIViewModel: RoomNotificationSettingsViewModel, ObservableObject {
+
+    @Published var viewState: RoomNotificationSettingsViewState
+    
+    lazy var cancellables = Set<AnyCancellable>()
+    
+    override init(roomNotificationService: RoomNotificationSettingsServiceType, initialState: RoomNotificationSettingsViewState) {
+    self.viewState = initialState
+        super.init(roomNotificationService: roomNotificationService, initialState: initialState)
+    }
+    
+    override func update(viewState: RoomNotificationSettingsViewState) {
+        super.update(viewState: viewState)
+        self.viewState = viewState
+    }
+}