Update completed solution for chapter 8

Chapter08/Complete/MyMediaCollection/Views/MainPage.xaml.cs

@@ -2,6 +2,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using MyMediaCollection.ViewModels;
+using MyMediaCollection.Helpers;
 
 namespace MyMediaCollection.Views
 {
@@ -10,10 +11,13 @@ namespace MyMediaCollection.Views
     /// </summary>
     public sealed partial class MainPage : Page
     {
+        public static MainPage Current;
+
         public MainPage()
         {
             ViewModel = App.HostContainer.Services.GetService<MainViewModel>();
             this.InitializeComponent();
+            Current = this;
             Loaded += MainPage_Loaded;
         }
 
@@ -27,5 +31,63 @@ namespace MyMediaCollection.Views
         }
 
         public MainViewModel ViewModel;
+
+        public void NotifyUser(string message, InfoBarSeverity severity, bool isOpen = true)
+        {
+            if (DispatcherQueue.HasThreadAccess)
+            {
+                UpdateStatus(message, severity, isOpen);
+            }
+            else
+            {
+                DispatcherQueue.TryEnqueue(() =>
+                {
+                    UpdateStatus(message, severity, isOpen);
+                });
+            }
+        }
+
+        private void UpdateStatus(string message, InfoBarSeverity severity, bool isOpen)
+        {
+            notifyInfoBar.Message = message;
+            notifyInfoBar.IsOpen = isOpen;
+            notifyInfoBar.Severity = severity;
+        }
+
+        public void NotificationReceived(NotificationShared.Notification notification)
+        {
+            var text = $"{notification.Originator}; Action: {notification.Action}";
+
+            if (notification.HasInput)
+            {
+                if (string.IsNullOrWhiteSpace(notification.Input))
+                    text += "; No input received";
+                else
+                    text += $"; Input received: {notification.Input}";
+            }
+
+            if (DispatcherQueue.HasThreadAccess)
+                DisplayMessageDialog(text);
+            else
+            {
+                DispatcherQueue.TryEnqueue(() =>
+                {
+                    DisplayMessageDialog(text);
+                });
+            }
+        }
+
+        private void DisplayMessageDialog(string message)
+        {
+            ContentDialog notifyDialog = new()
+            {
+                XamlRoot = this.XamlRoot,
+                Title = "Notification received",
+                Content = message,
+                CloseButtonText = "Ok"
+            };
+
+            notifyDialog.ShowAsync();
+        }
     }
 }