public async Task PayFee(Guid userId, Guid feeId, DateTime paymentDate)
{
var fee = await _feeRepository.GetById(feeId);
if (fee == null)
{
throw new KeyNotFoundException($"Fee with id: {feeId} not found.");
}
if (fee.PaymentDate != null)
{
throw new InvalidOperationException($"Fee with id: {feeId} has already been paid.");
}
var feeList = (await _feeRepository.GetAll()).Where(x => x.OwnFeesId == fee.OwnFeesId).OrderBy(x => x.ExpirationDate);
var previousFee = feeList.FirstOrDefault(x => x.ExpirationDate < fee.ExpirationDate);
if (previousFee != null && previousFee.PaymentDate == null)
{
throw new InvalidOperationException($"The previous fee must be paid.");
}
fee.PaymentDate = paymentDate;
await _feeRepository.Update(fee);
await _feeRepository.CommitAsync();
}