minimal api and typed results

Author: christiannagel

3_Web/Services/BooksApi/BooksApi/Controllers/BookChaptersController.cs

@@ -1,12 +1,14 @@
+using Books.Models;
+
 using BooksApi.Services;
+
+using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.OpenApi.Models;
 
 var builder = WebApplication.CreateBuilder(args);
 
-builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 
-// builder.Services.AddSwaggerGen();
 builder.Services.AddSwaggerGen(c =>
 {
     c.SwaggerDoc("v4", new OpenApiInfo { Title = "BooksApi", Version = "v4" });
@@ -28,12 +30,65 @@
 
 app.UseHttpsRedirection();
 app.UseAuthentication();
-app.MapControllers();
+
+app.MapGet("/bookchapters", async (IBookChapterService chapterService) =>
+{
+    var books = await chapterService.GetAllAsync();
+    return TypedResults.Ok(books);
+});
+
+app.MapGet("/bookchapters/{id}", async Task<Results<NotFound, Ok<BookChapter>>> (IBookChapterService chapterService, Guid id) =>
+{
+    var chapter = await chapterService.FindAsync(id);
+    if (chapter is null)
+    {
+        return TypedResults.NotFound();
+    }
+    else
+    {
+        return TypedResults.Ok(chapter);
+    }
+});
+
+app.MapPost("/bookchapters", async Task<Results<BadRequest, Created<BookChapter>>> (IBookChapterService chapterService, BookChapter chapter) =>
+{
+    if (chapter is null)
+    {
+        return TypedResults.BadRequest();
+    }
+    await chapterService.AddAsync(chapter);
+    return TypedResults.Created($"/bookchapters/{chapter.Id}", chapter);
+});
+
+app.MapPut("/bookchapters/{id}", async Task<Results<BadRequest, NotFound, NoContent>> (IBookChapterService chapterService, BookChapter chapter, Guid id) =>
+{
+    if (chapter is null || id != chapter.Id)
+    {
+        return TypedResults.BadRequest();
+    }
+
+    var existingChapter = await chapterService.FindAsync(id);
+    if (existingChapter is null) 
+    {
+        return TypedResults.NotFound();
+    }
+    else
+    {
+        return TypedResults.NoContent();
+    }
+});
+
+app.MapDelete("/bookchapters/{id}", async (IBookChapterService chapterService, Guid id) =>
+{
+    await chapterService.RemoveAsync(id);
+    return TypedResults.Ok();
+});
+
 
 app.MapGet("/init", async (SampleChapters sampleChapters, HttpContext context) =>
 {
     sampleChapters.CreateSampleChapters();
     await context.Response.WriteAsync("sample chapters initialized");
 });
-app.Run();
 
+app.Run();

3_Web/Services/BooksApi/BooksApi/Program.cs

@@ -32,6 +32,10 @@ To create a .NET 5 Azure Functions project use:
 
 > func init --worker-runtime dotnetIsolated
 
+## .NET 6 / .NET 7 Updates
+
+The API sample got changes to use the *Minimal API* instead of controllers. The Minimal API is a new feature in .NET 6 that allows you to create a web API without controllers. .NET 7 adds typed results (the TypedResults class).
+
 For code comments and issues please check [Professional C#'s GitHub Repository](https://github.com/ProfessionalCSharp/ProfessionalCSharp2021)
 
 Please check my blog [csharp.christiannagel.com](https://csharp.christiannagel.com "csharp.christiannagel.com") for additional information for topics covered in the book.

3_Web/Services/README.md

@@ -32,4 +32,8 @@ With .NET 7, the `LibraryImport` attribute can be used instead of `DllImport`. T
 
 See [PInvokeSampleLib in More Samples](5_More/PInvoke/). This [Readme](1_CS/Memory/Readme.md)  gives information on changes needed.
 
+## Minimal API
 
+Chapter 25, "Services", Page 715
+
+.NET 6 added Minimal APIs. .NET 7 added TypedResults. Minimal APIs are a new feature in .NET 6 that allows you to create a web API without controllers. .NET 7 adds typed results (the TypedResults class) which adds information to the OpenAPI document.