Egeland

exercise.webapi/DTO/AuthorDTO.cs

@@ -0,0 +1,12 @@
+namespace exercise.webapi.DTO
+{
+    public class AuthorDTO
+    {
+        public int Id { get; set; }
+        public string FirstName { get; set; }
+        public string LastName { get; set; }
+        public string Email { get; set; }
+
+        public List<BookDTO> Books { get; set; }
+    }
+}

exercise.webapi/DTO/AuthorPost.cs

@@ -0,0 +1,10 @@
+namespace exercise.webapi.DTO
+{
+    public class AuthorPost
+    {
+        public int Id { get; set; }
+        public string FirstName { get; set; }
+        public string LastName { get; set; }
+        public string Email { get; set; }
+    }
+}

exercise.webapi/DTO/BookDTO.cs

@@ -0,0 +1,12 @@
+using exercise.webapi.Models;
+
+namespace exercise.webapi.DTO
+{
+    public class BookDTO
+    {
+        public int Id { get; set; }
+        public string Title { get; set; }
+        public int AuthorId { get; set; }
+        public AuthorDTO Author { get; set; }
+    }
+}

exercise.webapi/DTO/BookPost.cs

@@ -0,0 +1,10 @@
+using exercise.webapi.Models;
+
+namespace exercise.webapi.DTO
+{
+    public class BookPost
+    {
+        public string Title { get; set; }
+        public int AuthorId { get; set; }
+    }
+}

exercise.webapi/DTO/BookPut.cs

@@ -0,0 +1,10 @@
+using exercise.webapi.Models;
+
+namespace exercise.webapi.DTO
+{
+    public class BookPut
+    {
+        public string? Title { get; set; }
+        public int? AuthorId { get; set; }
+    }
+}

exercise.webapi/Endpoints/AuthorApi.cs

@@ -0,0 +1,54 @@
+using exercise.webapi.DTO;
+using exercise.webapi.Models;
+using exercise.webapi.Repository;
+using static System.Reflection.Metadata.BlobBuilder;
+
+namespace exercise.webapi.Endpoints
+{
+    public static class AuthorApi
+    {
+        public static void ConfigureAuthorsApi(this WebApplication app)
+        {
+            var authors = app.MapGroup("/authors");
+            authors.MapGet("/", GetAuthors);
+            authors.MapGet("/{id}", GetAuthor);
+        }
+
+        private static async Task<IResult> GetAuthors(IAuthorRepository repository)
+        {
+            var authors = await repository.GetAllAuthors();
+            List<AuthorDTO> result = authors.Select(a => new AuthorDTO
+            {
+                Id = a.Id,
+                FirstName = a.FirstName,
+                LastName = a.LastName,
+                Email = a.Email,
+                Books = a.Books.Select(b => new BookDTO
+                {
+                    Id = b.Id,
+                    Title = b.Title,
+                }).ToList()
+            }).ToList();
+            return TypedResults.Ok(result);
+        }
+
+        private static async Task<IResult> GetAuthor(IAuthorRepository repository, int id)
+        {
+            var author = await repository.GetAuthor(id);
+            if (author == null) return TypedResults.NotFound("Not Found");
+            AuthorDTO result = new AuthorDTO
+            {
+                Id = author.Id,
+                FirstName = author.FirstName,
+                LastName = author.LastName,
+                Email = author.Email,
+                Books = author.Books.Select(b => new BookDTO
+                {
+                    Id = b.Id,
+                    Title = b.Title,
+                }).ToList()
+            };
+            return TypedResults.Ok(result);
+        }
+    }
+}

exercise.webapi/Endpoints/BookApi.cs

@@ -1,4 +1,5 @@
-using exercise.webapi.Models;
+using exercise.webapi.DTO;
+using exercise.webapi.Models;
 using exercise.webapi.Repository;
 using static System.Reflection.Metadata.BlobBuilder;
 
@@ -8,13 +9,126 @@ public static class BookApi
     {
         public static void ConfigureBooksApi(this WebApplication app)
         {
-            app.MapGet("/books", GetBooks);
+            var books = app.MapGroup("/books");
+            books.MapGet("/", GetBooks);
+            books.MapGet("/{id}", GetBook);
+            books.MapPost("/", AddBook);
+            books.MapPut("/{id}", UpdateBook);
+            books.MapDelete("/{id}", DeleteBook);
         }
 
-        private static async Task<IResult> GetBooks(IBookRepository bookRepository)
+        private static async Task<IResult> GetBooks(IBookRepository repository)
         {
-            var books = await bookRepository.GetAllBooks();
-            return TypedResults.Ok(books);
+            var books = await repository.GetAllBooks();
+            List<BookDTO> result = books.Select(b => new BookDTO
+            {
+                Id = b.Id,
+                Title = b.Title,
+                AuthorId = b.AuthorId,
+                Author = new AuthorDTO
+                {
+                    Id = b.Author.Id,
+                    FirstName = b.Author.FirstName,
+                    LastName = b.Author.LastName,
+                    Email = b.Author.Email
+            }}).ToList();
+            return TypedResults.Ok(result);
         }
+
+        private static async Task<IResult> GetBook(IBookRepository repository, int id)
+        {
+            var book = await repository.GetBook(id);
+            if (book == null) return TypedResults.NotFound("Not Found");
+            BookDTO result = new BookDTO
+            {
+                Id = book.Id,
+                Title = book.Title,
+                AuthorId = book.AuthorId,
+                Author = new AuthorDTO
+                {
+                    Id = book.Author.Id,
+                    FirstName = book.Author.FirstName,
+                    LastName = book.Author.LastName,
+                    Email = book.Author.Email
+                }
+            };
+            return TypedResults.Ok(result);
+        }
+
+        private static async Task<IResult> AddBook(IBookRepository bookRepository, IAuthorRepository authorRepository, BookPost model)
+        {
+            if ( model.Title == null ||  model.AuthorId == null) return TypedResults.BadRequest();
+            Author author = await authorRepository.GetAuthor(model.AuthorId);
+            if (author == null) return TypedResults.NotFound("Author not found");
+
+            Book book = new Book
+            {
+                Title = model.Title,
+                AuthorId = model.AuthorId,
+            };
+            await bookRepository.AddBook(book);
+
+            BookDTO result = new BookDTO
+            {
+                Id = book.Id,
+                Title = book.Title,
+                AuthorId = book.AuthorId,
+                Author = new AuthorDTO
+                {
+                    Id = book.Author.Id,
+                    FirstName = book.Author.FirstName,
+                    LastName = book.Author.LastName,
+                    Email = book.Author.Email
+                }
+            };
+            return TypedResults.Ok(result);
+        }
+
+        private static async Task<IResult> UpdateBook(IBookRepository bookRepository, IAuthorRepository authorRepository, int id, BookPut model)
+        {
+            if (model.Title == null && model.AuthorId == null) return TypedResults.BadRequest();
+            Author author = await authorRepository.GetAuthor((int)model.AuthorId);
+            if (author == null) return TypedResults.NotFound("Author not found");
+            Book book = await bookRepository.GetBook(id);
+
+            book.AuthorId = (int)author.Id;
+            await bookRepository.UpdateBook(book);
+
+            BookDTO result = new BookDTO
+            {
+                Id = book.Id,
+                Title = book.Title,
+                Author = new AuthorDTO
+                {
+                    Id = book.Author.Id,
+                    FirstName = book.Author.FirstName,
+                    LastName = book.Author.LastName,
+                    Email = book.Author.Email
+                }
+            };
+            return TypedResults.Ok(result);
+        }
+
+        private static async Task<IResult> DeleteBook(IBookRepository repository, int id)
+        {
+            var book = await repository.GetBook(id);
+            if (book == null) return TypedResults.NotFound("Not Found");
+            if (!await repository.DeleteBook(id)) return TypedResults.NotFound("Not Found");
+            BookDTO result = new BookDTO
+            {
+                Id = book.Id,
+                Title = book.Title,
+                AuthorId = book.AuthorId,
+                Author = new AuthorDTO
+                {
+                    Id = book.Author.Id,
+                    FirstName = book.Author.FirstName,
+                    LastName = book.Author.LastName,
+                    Email = book.Author.Email
+                }
+            };
+            return TypedResults.Ok(result);
+        }
+
     }
 }

exercise.webapi/Models/Author.cs

@@ -8,8 +8,6 @@ public class Author
         public string FirstName { get; set; }
         public string LastName { get; set; }
         public string Email { get; set; }
-
-        [JsonIgnore] // Todo: replace this with DTO approach
         public ICollection<Book> Books { get; set; } = new List<Book>();
     }
 }

exercise.webapi/Models/Book.cs

@@ -6,7 +6,6 @@ public class Book
     {
         public int Id { get; set; }
         public string Title { get; set; }
-
         public int AuthorId { get; set; }
         public Author Author { get; set; }
     }

exercise.webapi/Program.cs

@@ -11,6 +11,7 @@
 builder.Services.AddSwaggerGen();
 builder.Services.AddDbContext<DataContext>(opt => opt.UseInMemoryDatabase("Library"));
 builder.Services.AddScoped<IBookRepository, BookRepository>();
+builder.Services.AddScoped<IAuthorRepository, AuthorRepository>();
 
 var app = builder.Build();
 
@@ -29,4 +30,5 @@
 
 app.UseHttpsRedirection();
 app.ConfigureBooksApi();
+app.ConfigureAuthorsApi();
 app.Run();

exercise.webapi/Repository/AuthorRepository.cs

@@ -0,0 +1,28 @@
+using exercise.webapi.Data;
+using exercise.webapi.DTO;
+using exercise.webapi.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace exercise.webapi.Repository
+{
+    public class AuthorRepository : IAuthorRepository
+    {
+        DataContext _db;
+
+        public AuthorRepository(DataContext db)
+        {
+            _db = db;
+        }
+
+        public async Task<IEnumerable<Author>> GetAllAuthors()
+        {
+            return await _db.Authors.Include(a => a.Books).ToListAsync();
+        }
+
+        public async Task<Author> GetAuthor(int id)
+        {
+            return await _db.Authors.Include(a => a.Books).FirstOrDefaultAsync(a => a.Id == id);
+        }
+
+    }
+}

exercise.webapi/Repository/BookRepository.cs

@@ -1,4 +1,5 @@
 using exercise.webapi.Data;
+using exercise.webapi.DTO;
 using exercise.webapi.Models;
 using Microsoft.EntityFrameworkCore;
 
@@ -16,7 +17,34 @@ public BookRepository(DataContext db)
         public async Task<IEnumerable<Book>> GetAllBooks()
         {
             return await _db.Books.Include(b => b.Author).ToListAsync();
+        }
+
+        public async Task<Book> GetBook(int id)
+        {
+            return await _db.Books.Include(b => b.Author).FirstOrDefaultAsync(b => b.Id == id);
+        }
 
+        public async Task<Book> AddBook(Book book)
+        {
+            _db.Books.Add(book);
+            await _db.SaveChangesAsync();
+            return book;
+        }
+
+        public async Task<Book> UpdateBook(Book book)
+        {
+            _db.Books.Update(book);
+            await _db.SaveChangesAsync();
+            return book;
+        }
+
+        public async Task<bool> DeleteBook(int id)
+        {
+            var target = await _db.Books.Include(b => b.Author).FirstOrDefaultAsync(b => b.Id == id);
+            if (target == null) return false;
+            _db.Books.Remove(target);
+            await _db.SaveChangesAsync();
+            return true;
         }
     }
 }

exercise.webapi/Repository/IAuthorRepository.cs

@@ -0,0 +1,10 @@
+using exercise.webapi.Models;
+
+namespace exercise.webapi.Repository
+{
+    public interface IAuthorRepository
+    {
+        public Task<IEnumerable<Author>> GetAllAuthors();
+        public Task<Author> GetAuthor(int id);
+    }
+}

exercise.webapi/Repository/IBookRepository.cs

@@ -1,9 +1,15 @@
 using exercise.webapi.Models;
+using exercise.webapi.DTO;
 
 namespace exercise.webapi.Repository
 {
     public interface IBookRepository
     {
         public Task<IEnumerable<Book>> GetAllBooks();
+        public Task<Book> GetBook(int id);
+        public Task<Book> AddBook(Book book);
+        public Task<Book> UpdateBook(Book book);
+        public Task<bool> DeleteBook(int id);
+
     }
 }

exercise.webapi/exercise.webapi.csproj

@@ -9,9 +9,14 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.1" />
-    <PackageReference Include="Scalar.AspNetCore" Version="2.0.4" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.1" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.1" />
+    <PackageReference Include="Scalar.AspNetCore" Version="2.0.11" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="7.2.0" />
   </ItemGroup>
 
 </Project>