static void RentBook(LibraryContext context)
{
User userToRent = null;
Console.WriteLine("╔═════════════╗");
Console.WriteLine("║ BOOK RENTAL ║");
Console.WriteLine("╚═════════════╝");
do
{
Console.Write("Enter user's login: "******"Error: User with login " + login + " does not exist in the database. Try again.");
}
else if (userToRent.Role == User.RoleType.Administrator)
{
Console.WriteLine("Error: Books cannot be rented to administrators. To rent a book register as a regular user or use another account.\n");
}
} while (userToRent == null || userToRent.Role == User.RoleType.Administrator);
Console.WriteLine("---------------------------------------------");
foreach (var b in context.Books.Where(b => !b.Rented).ToList())
{
Author author = context.Authors.Single(a => a.Id == b.AuthorId);
Console.WriteLine(b.ISBN + "\t\t| \"" + b.Title + "\" " + author.FirstName + " " + author.LastName);
}
Book bookToRent = null;
do
{
Console.Write("\nEnter ISBN of the book for rental: ");
string ISBN = Console.ReadLine();
bookToRent = context.Books.SingleOrDefault(b => b.ISBN == ISBN);
if (bookToRent == null)
{
Console.WriteLine("Error: Invalid ISBN: " + ISBN + ". Try again.");
}
else if (bookToRent.Rented)
{
Console.WriteLine("Error: \"" + bookToRent.Title + "\" is already rented.");
}
} while (bookToRent == null || bookToRent.Rented);
bookToRent.RentedDate = DateTime.Now;
bookToRent.ReturnTerm = bookToRent.RentedDate.Value.AddDays(2);
bookToRent.Rented = true;
if (userToRent.RentedBooks == null)
{
userToRent.RentedBooks = new List <Book>();
}
userToRent.RentedBooks.Add(bookToRent);
context.SaveChanges();
Console.WriteLine("\"" + bookToRent.Title + "\" has been successfully rented to user " + userToRent.Login + ".\n");
Console.WriteLine("Press any key to continue.");
Console.ReadKey();
Console.Clear();
}
static void Prolong(User loggedUser, LibraryContext context)
{
Console.WriteLine("╔═════════╗");
Console.WriteLine("║ PROLONG ║");
Console.WriteLine("╚═════════╝");
context.Books.ToList();
if (loggedUser.RentedBooks == null)
{
Console.WriteLine("You don't have any rented books.");
}
else
{
foreach (var b in loggedUser.RentedBooks.ToList())
{
Author author = context.Authors.Single(a => a.Id == b.AuthorId);
if (b.ReturnTerm.Value.Day - DateTime.Now.Day <= 3 && b.ReturnTerm.Value.Month == DateTime.Now.Month)
{
Console.ForegroundColor = ConsoleColor.Yellow;
}
if (DateTime.Compare(b.ReturnTerm.Value, DateTime.Now) == -1)
{
Console.ForegroundColor = ConsoleColor.Red;
}
Console.WriteLine(b.ISBN + "\t\"" + b.Title + "\" " + author.FirstName + " " + author.LastName + "\tRented: " + b.RentedDate.Value.ToShortDateString() + "\tReturn term: " + b.ReturnTerm.Value.ToShortDateString());
Console.ForegroundColor = ConsoleColor.Gray;
}
Book bookToProlong = null;
do
{
Console.Write("\nEnter ISBN of the book's rental you want to prolong: ");
string ISBN = Console.ReadLine();
bookToProlong = loggedUser.RentedBooks.SingleOrDefault(book => book.ISBN == ISBN);
if (bookToProlong == null)
{
Console.WriteLine("ERROR: Invalid ISBN: " + ISBN + ". Try again.");
}
else if (bookToProlong.Prolonged)
{
Console.WriteLine("Error: Cannot prolong rental of the same book twice.");
Console.Write("Prolong rental of another book?\n[Y]\t[N] No\n> ");
if (Console.ReadKey().KeyChar.ToString().ToLower() == "n")
{
Console.Clear();
return;
}
}
} while (bookToProlong == null || bookToProlong.Prolonged);
bookToProlong.Prolonged = true;
bookToProlong.ReturnTerm = bookToProlong.ReturnTerm.Value.AddDays(14);
Console.WriteLine("Prolonged rental of \"" + bookToProlong.Title + "\" by 14 days.");
context.SaveChanges();
}
Console.WriteLine("\nPress any key to continue.");
Console.ReadKey();
Console.Clear();
}
static User LogIn(LibraryContext context)
{
Console.WriteLine("╔════════════╗");
Console.WriteLine("║ LOGGING IN ║");
Console.WriteLine("╚════════════╝");
string login, pass;
User loggedUser = null;
do
{
do
{
Console.Write("Login: "******"Error: Login is required! Try again.");
}
} while (string.IsNullOrEmpty(login));
do
{
Console.Write("Password: "******"Error: Password is required! Try again.");
}
} while (string.IsNullOrEmpty(pass));
foreach (var user in context.Users)
{
if (user.Login == login && user.Password == pass)
{
loggedUser = user;
break;
}
}
if (loggedUser == null)
{
Console.Write("Error: Login or password is incorrect.\nDo you want to try again?\n[Y]\t[N] No\n> ");
if (Console.ReadKey().KeyChar.ToString().ToLower() == "n")
{
break;
}
else
{
Console.WriteLine();
}
}
} while (loggedUser == null);
if (loggedUser != null)
{
Console.WriteLine("\nLogged in.");
Console.WriteLine("\nPress any key to continue.");
Console.ReadKey();
Console.Clear();
return(loggedUser);
}
else
{
Console.WriteLine("\nLogging in cancelled.");
Console.WriteLine("\nPress any key to continue.");
Console.ReadKey();
Console.Clear();
return(null);
}
}
static Book BookForm(LibraryContext Context, FormMode mode)
{
Book book = new Book();
string ISBN;
bool uniqueISBN;
if (mode == FormMode.New)
{
do
{
Console.Write("Enter ISBN of the new book: ");
ISBN = Console.ReadLine();
uniqueISBN = true;
foreach (var b in Context.Books)
{
if (b.ISBN == ISBN)
{
uniqueISBN = false;
break;
}
}
if (uniqueISBN && !string.IsNullOrEmpty(ISBN))
{
book.ISBN = ISBN;
break;
}
else
{
Console.WriteLine("Error: Entered ISBN is invalid or already taken. Try again.");
}
} while (!uniqueISBN || string.IsNullOrEmpty(ISBN));
}
string title;
do
{
Console.Write(mode == FormMode.New ? "Enter the title of the new book: " : "Enter new title of the editted book: ");
title = Console.ReadLine();
if (string.IsNullOrEmpty(title))
{
Console.WriteLine("Error: Title is required! Try again.");
}
} while (string.IsNullOrEmpty(title));
book.Title = title;
Console.Write(mode == FormMode.New ? "Enter the description of the new book: " : "Enter new description of the editted book: ");
book.Description = Console.ReadLine();
string authorsFirstName, authorsLastName;
do
{
Console.Write(mode == FormMode.New ? "Enter author's firstname:" : "Enter new author's firstname: ");
authorsFirstName = Console.ReadLine();
if (string.IsNullOrEmpty(authorsFirstName))
{
Console.WriteLine("Error: Author's firstname is required! Try again.");
}
} while (string.IsNullOrEmpty(authorsFirstName));
do
{
Console.Write(mode == FormMode.New ? "Enter author's lastname:" : "Enter new author's lastname: ");
authorsLastName = Console.ReadLine();
if (string.IsNullOrEmpty(authorsLastName))
{
Console.WriteLine("Error: Author's lastname is required! Try again.");
}
} while (string.IsNullOrEmpty(authorsLastName));
Author author = Context.Authors.SingleOrDefault(a => a.FirstName == authorsFirstName && a.LastName == authorsLastName);
if (author == null)
{
author = new Author
{
FirstName = authorsFirstName,
LastName = authorsLastName
};
Context.Authors.Add(author);
Context.SaveChanges();
}
book.AuthorId = author.Id;
Console.WriteLine(mode == FormMode.New ? "Select genre of the new book:" : "Select new genre of the editted book:");
Console.WriteLine("[1] Tragedy\n[2] Tragic comedy\n[3] Fantasy");
Console.WriteLine("[4] Mythology\n[5] Adventure\n[6] Mystery");
Console.WriteLine("[7] Science fiction\n[8] Drama\n[9] Romance");
Console.Write("[10] Action / Adventure\n[11] Satire\n[12] Horror\n> ");
int genreId;
while (!int.TryParse(Console.ReadLine(), out genreId) || genreId < 1 || genreId > 12)
{
Console.Write("Error: Invalid input.\nSelect a proper value.\n> ");
}
book.GenreId = genreId;
return(book);
}
static void RegisterUser(LibraryContext context)
{
Console.WriteLine("╔══════════════╗");
Console.WriteLine("║ REGISTRATION ║");
Console.WriteLine("╚══════════════╝");
string login, pass, passConfirm;
bool loginAvailable;
do
{
loginAvailable = true;
Console.Write("Enter login: "******"Error: Login is required! Try again.");
continue;
}
foreach (var user in context.Users)
{
if (user.Login == login)
{
loginAvailable = false;
Console.WriteLine("Login \"" + login + "\" is already taken. Use different one.");
}
}
} while (string.IsNullOrEmpty(login) || !loginAvailable);
do
{
Console.Write("Enter password: "******"Error: Password is required! Try again.");
}
} while (string.IsNullOrEmpty(pass));
do
{
Console.Write("Confirm password: "******"Error: Password confirmation differs from password. Try again.");
}
} while (string.IsNullOrEmpty(login) || pass != passConfirm);
context.Users.Add(new User
{
Login = login,
Password = pass,
Role = User.RoleType.Regular
});
context.SaveChanges();
Console.WriteLine("Account has been registered successfully.");
Console.WriteLine("\nPress any key to continue.");
Console.ReadKey();
Console.Clear();
}