public async Task <Member> FindBySsn(string ssn)
{
if (ssn == null)
{
throw new ArgumentNullException($"Ssn cannot be null.");
}
if (MemberUtils.ValidateSsn(ssn) == false)
{
throw new ArgumentException("Ssn is invalid.");
}
var memberMap = await _access.FindBySsn(ssn);
if (memberMap == null)
{
throw new NullReferenceException("Member map cannot be null.");
}
var member = _mapper.Unmap(memberMap);
if (member == null)
{
throw new NullReferenceException("Member cannot be null.");
}
return(member);
}
public void ValidateEmptySsnShouldReturnFalse()
{
var ssn = string.Empty;
var result = MemberUtils.ValidateSsn(ssn);
Assert.IsFalse(result);
}
public void ValidateNullSsnShouldReturnFalse()
{
string ssn = null;
var result = MemberUtils.ValidateSsn(ssn);
Assert.IsFalse(result);
}
public void ValidateInvalidSsnShouldReturnFalse()
{
var ssn = GenerateInvalidSsn();
var result = MemberUtils.ValidateSsn(ssn);
Assert.IsFalse(result);
}
// TODO handle cases when it fails to insert data into db
public async Task <RentAttemptModel> RentBooks(string ssn, IEnumerable <string> isbns)
{
if (!MemberUtils.ValidateSsn(ssn))
{
throw new ArgumentException("Invalid isbn");
}
if (isbns == null || !isbns.Any())
{
throw new ArgumentException("Isbn list cannot be empty when renting books");
}
var member = await _memberRepository.FindBySsn(ssn);
var role = await _memberRepository.GetRoleName(member);
if (!Roles.CanRent(role))
{
return(RentAttemptModel.WhenUserIsInWrongRole());
}
var order = new Order()
{
MemberId = ssn,
Created = DateTime.UtcNow
};
var orderId = await _orderRepository.InsertAsyncWithIdReturn(order);
foreach (var isbn in isbns)
{
var book = await _bookRepository.GetByIsbnAsync(isbn);
if (!book.Loanable)
{
return(RentAttemptModel.WhenOneOfTheBooksIsNotLoanable());
}
var availableCopies = (await _bookCopyRepository.GetByIsbnAsync(isbn))
.Where(x => x.Available).ToList();
if (availableCopies.Count == 0)
{
return(RentAttemptModel.WhenOneOfTheBooksDoesntHaveCopiesAvailable());
}
var chosenCopy = availableCopies[0];
chosenCopy.Available = false;
var orderLine = BookRentUtils.CreateOrderLineModel(orderId, chosenCopy.Id);
await _orderLineRepository.InsertAsync(orderLine);
await _bookCopyRepository.UpdateAsync(chosenCopy);
}
return(RentAttemptModel.WhenSuccesful());
}
