public BookResponse Take(int userId, int qrCode)
{
try
{
using (var context = new vlEntities())
{
var res = context.copies.Where(c => c.Id == qrCode).FirstOrDefault();
res.UserId = userId;
using (var context2 = new vlEntities())
{
var res2 = context2.books.Where(c => c.Id == res.BookId).FirstOrDefault();
++res2.Popularity;
context.SaveChanges();
context2.SaveChanges();
return(new BookResponse
{
WasUpdated = true,
BookInfo = new Book
{
Author = res2.Author,
Title = res2.Title,
QRCode = qrCode
}
});
}
}
}
catch (Exception)
{
return(new BookResponse {
WasUpdated = false
});
}
}
public bool DeleteUser(int UserId)
{
using (var context = new vlEntities())
{
try
{
context.users.Remove(context.users.Where(u => u.Id == UserId).FirstOrDefault());
context.SaveChanges();
return(true);
}
catch (Exception)
{
return(false);
}
}
}
public bool Register(users user)
{
using (var context = new vlEntities())
{
try
{
context.users.Add(user);
context.SaveChanges();
return(true);
}
catch (Exception)
{
return(false);
}
}
}
public bool Return(int qrCode)
{
try
{
using (var context = new vlEntities())
{
var res = context.copies.Where(c => c.Id == qrCode).FirstOrDefault();
res.UserId = null;
context.SaveChanges();
return(true);
}
}
catch (Exception)
{
return(false);
}
}