Model Buku dan Pengguna

using System;
using System.Collections.Generic;

namespace LibrarySystem
{
    class Program
    {
        public static void Main(string[] args)
        {
            // Baca nama library
            string libraryName = Console.ReadLine();
            
            // Buat instance Library dengan nama library
            Library library = new Library(libraryName);
            
            // Baca jumlah buku
            int numBooks = Convert.ToInt32(Console.ReadLine());
            
            // Baca dan tambahkan buku
            for (int i = 0; i < numBooks; i++)
            {
                string bookInput = Console.ReadLine();
                string[] bookParts = bookInput.Split('|');
                string bookId = bookParts[0];
                string bookTitle = bookParts[1];
                string bookAuthor = bookParts[2];
                
                Book book = new Book(bookId, bookTitle, bookAuthor);
                library.AddBook(book);
            }
            
            // Baca jumlah pengguna
            int numUsers = Convert.ToInt32(Console.ReadLine());
            
            // Baca dan daftarkan pengguna
            List<User> usersList = new List<User>();
            for (int i = 0; i < numUsers; i++)
            {
                string userInput = Console.ReadLine();
                string[] userParts = userInput.Split('|');
                string userName = userParts[0];
                int memberId = Convert.ToInt32(userParts[1]);
                
                User user = new User(userName, memberId);
                library.RegisterUser(user);
                usersList.Add(user);
            }
            
            // Baca jumlah operasi
            int numOperations = Convert.ToInt32(Console.ReadLine());
            
            // Proses operasi
            for (int i = 0; i < numOperations; i++)
            {
                string operationInput = Console.ReadLine();
                string[] opParts = operationInput.Split('|');
                string action = opParts[0];
                string bookId = opParts[1];
                int memberId = Convert.ToInt32(opParts[2]);
                
                Book book = library.GetBookById(bookId);
                User user = library.GetUserById(memberId);
                
                if (action == "borrow")
                {
                    string result = book.Borrow();
                    Console.WriteLine(result);
                    if (result.Contains("has been borrowed"))
                    {
                        user.AddBorrowedBook(bookId);
                    }
                }
                else if (action == "return")
                {
                    string result = book.Return();
                    Console.WriteLine(result);
                    if (result.Contains("has been returned"))
                    {
                        user.RemoveBorrowedBook(bookId);
                    }
                }
            }
            
            // Tampilkan ringkasan untuk setiap pengguna
            foreach (User user in usersList)
            {
                Console.WriteLine($"{user.Name}: {user.BorrowedCount} book(s)");
            }
        }
    }
}