Add NotificationSettings and Keywords UI and VM

Riot/Modules/Settings/Notifications/ViewModel/NotificationSettingsViewModel.swift

@@ -0,0 +1,81 @@
+// File created from ScreenTemplate
+// $ createScreen.sh Settings/Notifications NotificationSettings
+/*
+ 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 Combine
+import SwiftUI
+
+@available(iOS 14.0, *)
+final class NotificationSettingsViewModel: NotificationSettingsViewModelType, ObservableObject {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    // MARK: Public
+
+    weak var viewDelegate: NotificationSettingsViewModelViewDelegate?
+    weak var coordinatorDelegate: NotificationSettingsViewModelCoordinatorDelegate?
+    
+    @Published var viewState: NotificationSettingsViewState
+    
+    // MARK: - Setup
+    
+    init(initialState: NotificationSettingsViewState) {
+        self.viewState = initialState
+    }
+    
+    convenience init(rules: [PushRuleId]) {
+        let ruleSate = rules.map({ PushRuleSelectedState(ruleId: $0, selected: false) })
+        self.init(initialState: NotificationSettingsViewState(saving: false, selectionState: ruleSate))
+    }
+    
+    deinit {
+        self.cancelOperations()
+    }
+    
+    // MARK: - Public
+    
+    func process(viewAction: NotificationSettingsViewAction) {
+        switch viewAction {
+        case .load:
+            self.loadData()
+        case .save:
+            break
+        case .cancel:
+            self.cancelOperations()
+//            self.coordinatorDelegate?.notificationSettingsViewModelDidCancel(self)
+        case .selectNotification(_, _):
+            break
+        }
+    }
+    
+    // MARK: - Private
+    
+    private func loadData() {
+
+    }
+    
+    private func update(viewState: NotificationSettingsViewState) {
+//        self.viewDelegate?.notificationSettingsViewModel(self, didUpdateViewState: viewState)
+    }
+    
+    private func cancelOperations() {
+    
+    }
+}