public ActionResult Borrow(string bookId)
{
///Check if User exists, if a user doesn't exist, redirect page to log in page.
if (Session["UserList"] == null)
{
return(RedirectToAction("LogInView", "User"));
}
User currentUser = (User)Session["CurrentActiveUser"];
listOfBooks = (List <CatalogBook>)Session["listOfBooksObject"];
User userThatBorrowedBook = listOfBooks.Where(w => w.Id == bookId).Select(u => u.UserWhoBorrowedBook).FirstOrDefault();
CatalogBook selectedBook = listOfBooks.Where(w => w.Id == bookId).FirstOrDefault();
if (userThatBorrowedBook == null)
{
listOfBooks.Where(w => w.Id == bookId).ToList().ForEach(s => s.UserWhoBorrowedBook = currentUser);
Session["listOfBooksObject"] = listOfBooks;
ResponseMessageAfterBookOp rmabo = new ResponseMessageAfterBookOp()
{
User = currentUser,
ResponseMessage = "You have successfully borrowed the book.",
BookInformation = selectedBook
};
return(View(rmabo));
}
else if (currentUser.UserId == userThatBorrowedBook.UserId)
{
ResponseMessageAfterBookOp rmabb = new ResponseMessageAfterBookOp()
{
User = currentUser,
ResponseMessage = "You have already borrowed this book.",
BookInformation = selectedBook
};
return(View(rmabb));
}
else
{
ResponseMessageAfterBookOp rmabb = new ResponseMessageAfterBookOp()
{
User = userThatBorrowedBook,
ResponseMessage = "Currently, you can not borrow this book because the selected book is already borrowed.",
BookInformation = selectedBook
};
return(View(rmabb));
}
}
public ActionResult Return(string bookId)
{
///Check if User exists, if a user doesn't exist, redirect page to log in page.
if (Session["UserList"] == null)
{
return(RedirectToAction("LogInView", "User"));
}
User currentUser = (User)Session["CurrentActiveUser"];
listOfBooks = (List <CatalogBook>)Session["listOfBooksObject"];
CatalogBook selectedBook = listOfBooks.Where(w => w.Id == bookId).FirstOrDefault();
///Response message
ResponseMessageAfterBookOp rmabo = new ResponseMessageAfterBookOp()
{
User = currentUser,
BookInformation = selectedBook
};
if (selectedBook.UserWhoBorrowedBook != null)
{
if (selectedBook.UserWhoBorrowedBook.UserId == currentUser.UserId)
{
listOfBooks.Where(w => w.Id == bookId).ToList().ForEach(s => s.UserWhoBorrowedBook = null);
Session["listOfBooksObject"] = listOfBooks;
rmabo.ResponseMessage = "You have successfully returned the book.";
}
else
{
rmabo.ResponseMessage = "You can not return a book which you did not borrow.";
}
}
else
{
rmabo.ResponseMessage = "You can not return a book which is not borrowed.";
}
return(View(rmabo));
}
