public DetailsInputViewModel GoToRandomBook(IQueryable <ApplicationUser> username)
{
Random rnd = new Random(); //Create a new instance of the random class
var allBooks = GetAllBooks(); //Retrieve all books from the database
int randomId = rnd.Next(GetHighestBookId()); //Get a (pseudo)random Id in the range of Id's
while (GetBookById(randomId) == null)
{ //Some Id's that are fetched don't belong to any book
randomId = rnd.Next(GetHighestBookId()); //so a new Id has to be fetched until it is valid
} //to avoid a NullReferenceException
var newbook = new DetailsInputViewModel();
newbook.Book = GetBookById(randomId); //newbook is of type DetailsInputViewModel which will initally be empty
newbook.Reviews = GetReviews(randomId); //so we mmust populate it manually with the book and it's reviews
ChangeUserIdToName(newbook.Reviews, username); //Display the username instead of the userId on the reviews
return(newbook);
}
public async Task <IActionResult> Details(int BookId, DetailsInputViewModel model)
{
if (!ModelState.IsValid)
{
ViewData["ErrorMessage"] = "Error";
return(RedirectToAction("Details", "Home"));
}
var review = model.Input;
review.BookId = BookId;
_reviewService.ProcessReview(review); //Error handling
var user = await _userManager.GetUserAsync(User);
review.UserId = user.Id;
_bookService.AddReview(review);
return(RedirectToAction("Details", "Home"));
}
public IActionResult Details(int id)
{
if (id == 0)
{
return(View("Error"));
}
var idbook = _bookService.GetBookById(id);
var reviews = _bookService.GetReviews(id);
var details = new DetailsInputViewModel();
var username = _userManager.Users;
_bookService.ChangeUserIdToName(reviews, username); //Get username to show with the reviews
details.Book = idbook;
details.Reviews = reviews;
return(View(details));
}
