using System; using System.Collections.Generic; using System.Text.Json; namespace Bücherwurm { class Catalogue { private List Books {get; set;} private int NextId {get; set;} public Catalogue() { Books = new List(); NextId = 1; } public void Import(string JsonString) { var intermediateBooks = JsonSerializer.Deserialize>(JsonString); foreach (var ibook in intermediateBooks) { ibook.OverwriteNullId(NextId); NextId = NextId + 1; } Books = intermediateBooks; } public void Add(string Title, string Author, string Country, string ILink, string Link, string Language, int Pages, int Year) { Books.Add(new Book(NextId, Title, Author, Country, ILink, Link, Language, Pages, Year)); NextId = NextId++; } public void Remove(int BookID) { Books.RemoveAll(book => book.BookId == BookID); } public List GetBooks() { return Books; } public Book LookupBook(int BookId) { return Books.Find(book => book.BookId == BookId); } } }