Added MauiAppBuilder extension for the ShellNavigator

src/SharedMauiCoreLibrary.Licensing/Hosting/AppHostBuilderExtensions.cs

@@ -14,16 +14,17 @@ public static MauiAppBuilder ConfigureLicensing(this MauiAppBuilder builder, Uri
             builder.Services.AddSingleton<ILicenseManager>(manager);
             return builder;
         }
-        public static MauiAppBuilder ConfigureAppUpdater(this MauiAppBuilder builder, ILicenseManager licenseManager, IDispatcher dispatcher)
+        public static MauiAppBuilder ConfigureAppUpdater(this MauiAppBuilder builder, ILicenseManager licenseManager, IDispatcher? dispatcher = null)
         {
+            dispatcher ??= builder.Services.BuildServiceProvider().GetService<IDispatcher>();
             AppUpdateManager manager = new(dispatcher, licenseManager);
             builder.Services.AddSingleton<IAppUpdateManager>(manager);
             return builder;
         }
-        public static MauiAppBuilder ConfigureAppUpdater(this MauiAppBuilder builder)
+        public static MauiAppBuilder ConfigureAppUpdater(this MauiAppBuilder builder, IDispatcher? dispatcher = null)
         {
             ILicenseManager? licenseManager = builder.Services.BuildServiceProvider().GetService<ILicenseManager>();
-            IDispatcher? dispatcher = builder.Services.BuildServiceProvider().GetService<IDispatcher>();
+            dispatcher ??= builder.Services.BuildServiceProvider().GetService<IDispatcher>();
             if (licenseManager is not null && dispatcher is not null)
             {
                 builder.ConfigureAppUpdater(licenseManager, dispatcher);

src/SharedMauiCoreLibrary/Hosting/AppHostBuilderExtensions.cs

@@ -1,5 +1,6 @@
 using AndreasReitberger.Shared.Core.Interfaces;
 using AndreasReitberger.Shared.Core.Localization;
+using AndreasReitberger.Shared.Core.NavigationManager;
 using CommunityToolkit.Maui;
 using System.Runtime.Versioning;
 
@@ -37,5 +38,14 @@ public static MauiAppBuilder ConfigureLocalizationManager(this MauiAppBuilder bu
             builder.Services.AddSingleton<ILocalizationManager>(manager);
             return builder;
         }
+
+        public static MauiAppBuilder ConfigureShellNavigator(this MauiAppBuilder builder, string rootPage, List<string>? entryPages = null, IDispatcher? dispatcher = null)
+        {
+            dispatcher ??= builder.Services.BuildServiceProvider().GetService<IDispatcher>();
+            ShellNavigator navigator = dispatcher is not null ? new(rootPage, dispatcher) : new(rootPage);
+            navigator.AvailableEntryPages = [.. entryPages ?? [ rootPage]];
+            builder.Services.AddSingleton<IShellNavigator>(navigator);
+            return builder;
+        }
     }
 }

src/SharedMauiCoreLibrary/Interfaces/IShellNavigator.cs

@@ -18,6 +18,8 @@ public interface IShellNavigator
         public Task<bool> GoToRootAsync(string target, Dictionary<string, object>? parameters = null, bool? flyoutIsPresented = null, int delay = -1, bool animate = false, string rootPrefix = "///");
         public Task<bool> GoBackAsync(Dictionary<string, object>? parameters = null, bool? flyoutIsPresented = null, int delay = -1, bool animate = false, bool confirm = false, Func<Task<bool>>? confirmFunction = null);
         bool IsCurrentPathRoot();
+        public void SubscribeNavigated();
+        public void UnsubscribeNavigated();
         #endregion
 
         #region Events

src/SharedMauiCoreLibrary/Models/NavigationManager/ShellNavigator.cs

@@ -1,5 +1,6 @@
 using AndreasReitberger.Shared.Core.Events;
 using AndreasReitberger.Shared.Core.Interfaces;
+using System.Diagnostics;
 
 namespace AndreasReitberger.Shared.Core.NavigationManager
 {
@@ -58,7 +59,7 @@ public static IShellNavigator Instance
         public ShellNavigator()
         {
             Dispatcher = DispatcherProvider.Current.GetForCurrentThread();
-            Shell.Current.Navigated += (a, b) =>
+            Shell.Current?.Navigated += (a, b) =>
             {
                 string msg = $"Navigation: From '{b.Previous?.Location}' to '{b.Current?.Location}'. Source = '{b.Source}'";
                 OnNavigationDone(new NavigationDoneEventArgs()
@@ -221,7 +222,36 @@ string GetCurrentRoute()
                 return string.Empty;
             }
         }
+        public void SubscribeNavigated()
+        {
+            if (Shell.Current is not null)
+            {
+                UnsubscribeNavigated();
+                Shell.Current.Navigated += OnNavigated;
+            }
+        }
+        public void UnsubscribeNavigated()
+        {
+            if (Shell.Current is not null)
+            {
+                Shell.Current.Navigated -= OnNavigated;
+            }
+        }
 
+        private void OnNavigated(object? sender, ShellNavigatedEventArgs e)
+        {
+#if DEBUG
+            string msg = $"Navigation: From '{e.Previous?.Location}' to '{e.Current?.Location}'. Source = '{e.Source}'";
+            Debug.WriteLine(msg);
+#endif
+            OnNavigationDone(new NavigationDoneEventArgs()
+            {
+                Arguments = e,
+                NavigatedFrom = e.Previous?.Location,
+                NavigatedTo = e.Current?.Location,
+                Source = e.Source,
+            });
+        }
         #endregion
 
     }