added preventation for local navigation

Author: linkdotnet

src/LinkDotNet.Blog.Web/Features/Admin/BlogPostEditor/Components/CreateNewBlogPost.razor

@@ -1,4 +1,5 @@
 @using LinkDotNet.Blog.Domain
+@inject IToastService ToastService
 
 <h3>@Title</h3>
 
@@ -93,6 +94,8 @@
 
     private CreateNewModel model = new();
 
+    private bool ignoreIsDirty;
+
     protected override void OnParametersSet()
     {
         if (BlogPost == null)
@@ -124,7 +127,12 @@
 
     private void PreventNavigationWhenDirty(LocationChangingContext context)
     {
-        if (model.IsDirty)
+        if (model.IsDirty && !ignoreIsDirty)
+        {
             context.PreventNavigation();
+            ToastService.ShowWarning(
+                "You have unsaved changes. Click on this message to ignore this warning the next time",
+                onClick: () => ignoreIsDirty = true);
+        }
     }
 }

tests/LinkDotNet.Blog.UnitTests/Web/Features/Admin/BlogPostEditor/Components/CreateNewBlogPostTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using Blazored.Toast.Services;
 using Bunit;
 using LinkDotNet.Blog.Domain;
 using LinkDotNet.Blog.TestUtilities;
@@ -14,6 +15,7 @@ public class CreateNewBlogPostTests : TestContext
     public CreateNewBlogPostTests()
     {
         ComponentFactories.AddStub<UploadFile>();
+        Services.AddScoped(_ => Mock.Of<IToastService>());
     }
 
     [Fact]