public int ReplaceBook(ReplaceBooksModel model)
{
var oldBookInRent = LibraryRepository.GetBookInRent(model.OldBookId);
if (oldBookInRent == null)
{
throw new Exception($"The book with ID = {model.OldBookId} has not been rent.");
}
var newBookInRent = LibraryRepository.GetBookInRent(model.NewBookId);
if (newBookInRent != null)
{
throw new Exception($"The book with ID = {model.NewBookId} has already been rent.");
}
var user = LibraryRepository.GetUser(model.UserId);
if (user == null)
{
throw new Exception($"The user with ID = {model.UserId} doesn't exist.");
}
newBookInRent = new BookInRent
{
BookID = model.NewBookId,
UserID = model.UserId
};
newBookInRent = LibraryRepository.ReplaceBook(oldBookInRent, newBookInRent);
return(newBookInRent.ID);
}
public IHttpActionResult ReplaceBooks([FromBody] ReplaceBooksModel model)
{
try
{
var newRentId = LibraryService.ReplaceBook(model);
return(Ok(newRentId));
}
catch (Exception ex)
{
return(BadRequest(ex.Message));
}
}
