public ApiResult<Book> LoanBook(string isbn)
{
try
{
using (var db = new BookShelfDbContext())
{
var book = db.Books.SingleOrDefault(b => b.Isbn == isbn);
if (book == null)
return new ApiResult<Book>()
{
Success = false,
ErrorMessages = new List<string>() { "Book doesn't exist" }
};
if (book.Loaned)
return new ApiResult<Book>()
{
Success = false,
ErrorMessages = new List<string>() { "Book is already loaned" }
};
book.Loaned = true;
db.Entry(book).State = EntityState.Modified;
db.SaveChanges();
return new ApiResult<Book>()
{
Result = book,
Success = true
};
}
}
catch (Exception e)
{
return new ApiResult<Book>()
{
Success = false,
ErrorMessages = new List<string>() { e.Message }
};
}
}
