Removed unused code from NavigationService.

Author: David Britch

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/Navigation/INavigationService.cs

@@ -1,5 +1,4 @@
 using eShopOnContainers.Core.ViewModels.Base;
-using System;
 using System.Threading.Tasks;
 
 namespace eShopOnContainers.Services
@@ -12,12 +11,6 @@ public interface INavigationService
 
         Task NavigateToAsync<TViewModel>(object parameter) where TViewModel : ViewModelBase;
 
-        Task NavigateToAsync(Type viewModelType);
-
-        Task NavigateToAsync(Type viewModelType, object parameter);
-
-        Task NavigateBackAsync();
-
         Task RemoveLastFromBackStackAsync();
 
         Task RemoveBackStackAsync();

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/Navigation/NavigationService.cs

@@ -12,14 +12,6 @@ namespace eShopOnContainers.Services
 {
     public class NavigationService : INavigationService
     {
-        protected Application CurrentApplication
-        {
-            get
-            {
-                return Application.Current;
-            }
-        }
-
         public Task InitializeAsync()
         {
             if(string.IsNullOrEmpty(Settings.AuthAccessToken))
@@ -38,32 +30,9 @@ public Task NavigateToAsync<TViewModel>(object parameter) where TViewModel : Vie
             return InternalNavigateToAsync(typeof(TViewModel), parameter);
         }
 
-        public Task NavigateToAsync(Type viewModelType)
-        {
-            return InternalNavigateToAsync(viewModelType, null);
-        }
-
-        public Task NavigateToAsync(Type viewModelType, object parameter)
-        {
-            return InternalNavigateToAsync(viewModelType, parameter);
-        }
-
-        public async Task NavigateBackAsync()
-        {
-            if (CurrentApplication.MainPage is CatalogView)
-            {
-                var mainPage = CurrentApplication.MainPage as CatalogView;
-                await mainPage.Navigation.PopAsync();
-            }
-            else if (CurrentApplication.MainPage != null)
-            {
-                await CurrentApplication.MainPage.Navigation.PopAsync();
-            }
-        }
-
-        public virtual Task RemoveLastFromBackStackAsync()
+        public Task RemoveLastFromBackStackAsync()
         {
-            var mainPage = CurrentApplication.MainPage as CustomNavigationView;
+            var mainPage = Application.Current.MainPage as CustomNavigationView;
 
             if (mainPage != null)
             {
@@ -74,9 +43,9 @@ public virtual Task RemoveLastFromBackStackAsync()
             return Task.FromResult(true);
         }
 
-        public virtual Task RemoveBackStackAsync()
+        public Task RemoveBackStackAsync()
         {
-            var mainPage = CurrentApplication.MainPage as CustomNavigationView;
+            var mainPage = Application.Current.MainPage as CustomNavigationView;
 
             if (mainPage != null)
             {
@@ -90,31 +59,31 @@ public virtual Task RemoveBackStackAsync()
             return Task.FromResult(true);
         }
 
-        protected virtual async Task InternalNavigateToAsync(Type viewModelType, object parameter)
+        private async Task InternalNavigateToAsync(Type viewModelType, object parameter)
         {
             Page page = CreatePage(viewModelType, parameter);
 
             if (page is LoginView)
             {
-                CurrentApplication.MainPage = new CustomNavigationView(page);
+                Application.Current.MainPage = new CustomNavigationView(page);
             }
             else
-            {
-                var navigationPage = CurrentApplication.MainPage as CustomNavigationView;
+			{
+                var navigationPage = Application.Current.MainPage as CustomNavigationView;
                 if (navigationPage != null)
                 {
                     await navigationPage.PushAsync(page);
                 }
                 else
                 {
-                    CurrentApplication.MainPage = new CustomNavigationView(page);
+                    Application.Current.MainPage = new CustomNavigationView(page);
                 }
             }
 
             await (page.BindingContext as ViewModelBase).InitializeAsync(parameter);
         }
 
-		protected Type GetPageTypeForViewModel(Type viewModelType)
+		private Type GetPageTypeForViewModel(Type viewModelType)
 		{
 			var viewName = viewModelType.FullName.Replace("Model", string.Empty);
 			var viewModelAssemblyName = viewModelType.GetTypeInfo().Assembly.FullName;
@@ -123,7 +92,7 @@ protected Type GetPageTypeForViewModel(Type viewModelType)
 			return viewType;
 		}
 
-		protected Page CreatePage(Type viewModelType, object parameter)
+		private Page CreatePage(Type viewModelType, object parameter)
 		{
 			Type pageType = GetPageTypeForViewModel(viewModelType);
 			if (pageType == null)

src/Mobile/eShopOnContainers/eShopOnContainers.Core/ViewModels/MainViewModel.cs

@@ -2,7 +2,6 @@
 using eShopOnContainers.Core.ViewModels.Base;
 using eShopOnContainers.Core.Models.Navigation;
 using Xamarin.Forms;
-using eShopOnContainers.Core.ViewModels.Base;
 using System.Windows.Input;
 
 namespace eShopOnContainers.Core.ViewModels