LivreLand/Model/ILibraryManager.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Model
{
    public interface ILibraryManager
    {
        Task<Book> GetBookById(string id);
        Task<Book> GetBookByISBN(string isbn);
        Task<Tuple<long, IEnumerable<Book>>> GetBooksByTitle(string title, int index, int count, string sort = "");
        Task<Tuple<long, IEnumerable<Book>>> GetBooksByAuthorId(string authorId, int index, int count, string sort = "");
        Task<Tuple<long, IEnumerable<Book>>> GetBooksByAuthor(string author, int index, int count, string sort = "");
        Task<Author> GetAuthorById(string id);
        Task<Tuple<long, IEnumerable<Author>>> GetAuthorsByName(string substring, int index, int count, string sort = "");
    }
}