Refactor command handlers and Startup

src/AppCommon/FileTime.App.Core/Startup.cs

@@ -0,0 +1,27 @@
+using FileTime.App.Core.Services;
+using FileTime.App.Core.Services.CommandHandler;
+using FileTime.App.Core.ViewModels;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace FileTime.App.Core
+{
+    public static class Startup
+    {
+        public static IServiceCollection AddCoreAppServices(this IServiceCollection serviceCollection)
+        {
+            return serviceCollection
+                .AddTransient<ITabViewModel, TabViewModel>()
+                .AddTransient<IContainerViewModel, ContainerViewModel>()
+                .AddTransient<IElementViewModel, ElementViewModel>()
+                .AddTransient<IItemNameConverterService, ItemNameConverterService>()
+                .AddSingleton<ICommandHandlerService, CommandHandlerService>()
+                .AddCommandHandlers();
+        }
+
+        private static IServiceCollection AddCommandHandlers(this IServiceCollection serviceCollection)
+        {
+            return serviceCollection
+                .AddSingleton<ICommandHandler, NavigationCommandHandler>();
+        }
+    }
+}