public async Task LeaseBookAsync(BookLeaseViewModel bookLeaseViewModel)
{
var storableBook = await _bookStorage.GetAll().FirstOrDefaultAsync(x => x.BookId == bookLeaseViewModel.BookId);
_bookRentValidator.AfterLeaseValidate(storableBook, bookLeaseViewModel);
using var transaction = new CommittableTransaction(new TransactionOptions
{ IsolationLevel = IsolationLevel.ReadCommitted });
try
{
storableBook.Free--;
await _bookStorage.SaveAsync(storableBook);
await _bookRent.SaveAsync(new BookRent
{
BookId = bookLeaseViewModel.BookId,
CustomerId = bookLeaseViewModel.CustomerId,
StartRent = DateTime.Now,
PlanEndRent = bookLeaseViewModel.PlanEndDate,
});
transaction.Commit();
}
catch (Exception e)
{
transaction.Rollback();
// log error
throw e;
}
}
public void AfterLeaseValidate(BookStorage storableBook, BookLeaseViewModel bookLeaseViewModel)
{
if (storableBook == null)
{
throw new ValidationException("Данной книги нет в хранилище.");
}
if (_bookRent.GetAll().Any(x =>
x.CustomerId == bookLeaseViewModel.CustomerId &&
x.BookId == bookLeaseViewModel.BookId &&
!x.FactEndRent.HasValue))
{
throw new ValidationException("У клиента уже есть данная книга в аренде.");
}
if (storableBook.Free == 0)
{
throw new ValidationException("Экземпляров книги больше нет в наличии.");
}
}
public async Task <IActionResult> LeaseOne([FromBody] BookLeaseViewModel bookLeaseViewModel)
{
await _bookRentService.LeaseBookAsync(bookLeaseViewModel);
return(Ok());
}
