HomeLibrary/HomeLibrary.Api/Extensions/DtoConversions.cs

using HomeLibrary.Api.Entities;
using HomeLibrary.Models.Dtos;

namespace HomeLibrary.Api.Extensions
{
    public static class DtoConversions
    {
        public static IEnumerable<CompleteBookDto> ConvertToDto(this IEnumerable<Book> books, IEnumerable<Author> authors)
        {
            return (from book in books
                    join author in authors
                    on book.AuthorId equals author.Id
                    select new CompleteBookDto
                    {
                        BookId = book.Id,
                        AuthorId = author.Id,
                        AuthorName = author.Name,
                        Title = book.Title,
                        Series = book.Series,
                        BookNumber = book.BookNumber
                    }).ToList();
        }

        public static IEnumerable<BookDto> ConvertToDto(this IEnumerable<Book> books)
        {
            return (from book in books
                    select new BookDto
                    {
                        Id = book.Id,
                        AuthorId = book.AuthorId,
                        Title = book.Title,
                        Series = book.Series,
                        BookNumber = book.BookNumber
                    }).ToList();
        }
    }
}