public static IEnumerable <MaterialBatchViewModel> JoinAutomaticBatches(IEnumerable <MaterialBatchViewModel> source, AmountProcessor processor)
{
var targetList = new List <MaterialBatchViewModel>();
foreach (var batch in source.OrderBy(i => i.MaterialId))
{
if (batch.AutomaticBatches && (targetList.LastOrDefault()?.MaterialId == batch.MaterialId))
{
var joined = targetList.Last();
joined.BatchNumber = null;
joined.Id = null;
var sum = processor.Add(processor.ToAmount(batch.Volume, batch.UnitName),
processor.ToAmount(joined.Volume, joined.UnitName));
joined.UnitName = sum.Unit.Symbol;
joined.Volume = sum.Value;
continue;
}
targetList.Add(batch);
}
return(targetList);
}