public virtual void AddMultipleStockEntries(IEnumerable <StockEntry> stockentries)
{
//TODO:Add Validation
var existingAndNewEntries = stockentries.Select(st => (Existing: GetByNfCode(st.NfNumber), Given: st));
var newEntries = existingAndNewEntries.Where(st => st.Existing is null)
.Select(st => st.Given);
var existingEntries = existingAndNewEntries.Where(st => !(st.Existing is null));
foreach (var(Existing, Given) in existingEntries)
{
Given.Items.ToList().ForEach(given => Existing.AddEntry(given));
}
_stockEntryRepository.AddRange(newEntries);
_stockEntryRepository.AddRange(existingEntries.Select(st => st.Existing));
_stockEntryRepository.SaveChanges();
}