public IHttpActionResult PostUserIssuedBook(UserIssuedBook userIssuedBook)
{
var user = db.Users.SingleOrDefault(x => x.Id == userIssuedBook.UserID);
user.LoanNumber = user.LoanNumber + 1;
var book = db.Books.SingleOrDefault(x => x.ID == userIssuedBook.BookID);
book.LoanCopy = book.LoanCopy + 1;
if (user.LoanNumber > 2 || userIssuedBook.isIssued == false)
{
return(BadRequest("You are already borrowed 2 books, Return a book then you can borrow a new book!"));
}
if (book.BookCopy - book.LoanCopy == -1)
{
return(BadRequest("There are no books in stock!"));
}
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
db.UserIssuedBooks.Add(userIssuedBook);
db.SaveChanges();
return(StatusCode(HttpStatusCode.Created));
}
public IHttpActionResult DeleteUserIssuedBook(int id)
{
UserIssuedBook userIssuedBook = db.UserIssuedBooks.Find(id);
if (userIssuedBook == null)
{
return(NotFound());
}
db.UserIssuedBooks.Remove(userIssuedBook);
db.SaveChanges();
return(Ok(userIssuedBook));
}
public IHttpActionResult PutUserIssuedBook(int id, UserIssuedBook userIssuedBook)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
if (id != userIssuedBook.ID)
{
return(BadRequest());
}
db.Entry(userIssuedBook).State = EntityState.Modified;
try
{
var user = db.Users.SingleOrDefault(x => x.Id == userIssuedBook.UserID);
user.LoanNumber = user.LoanNumber - 1;
var book = db.Books.SingleOrDefault(x => x.ID == userIssuedBook.BookID);
book.LoanCopy = book.LoanCopy - 1;
db.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
if (!UserIssuedBookExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(StatusCode(HttpStatusCode.NoContent));
}
