public IParcel AddParcel(Date date, Date aquisitionDate, int units, decimal amount, decimal costBase, IPortfolioTransaction transaction)
{
var parcel = new Parcel(Guid.NewGuid(), date, aquisitionDate, new ParcelProperties(units, amount, costBase), transaction);
_Parcels.Add(parcel.Id, parcel);
var exisingProperties = Properties[date];
var newProperties = new HoldingProperties(exisingProperties.Units + units, exisingProperties.Amount + amount, exisingProperties.CostBase + costBase);
_Properties.Change(date, newProperties);
return(parcel);
}
public void DisposeOfParcel(Guid parcelId, Date date, int units, decimal amount, decimal capitalGain, CgtMethod cgtMethod, IPortfolioTransaction transaction)
{
if (!_Parcels.TryGetValue(parcelId, out var parcel))
{
throw new ArgumentException("Parcel is not part of this holding");
}
var parcelProperties = parcel.Properties[date];
if (units > parcelProperties.Units)
{
throw new NotEnoughSharesForDisposal("Not enough shares in parcel");
}
// Adjust Parcel
decimal costBaseChange;
decimal amountChange;
if (units == parcelProperties.Units)
{
amountChange = parcelProperties.Amount;
costBaseChange = parcelProperties.CostBase;
}
else
{
amountChange = (parcelProperties.Amount * ((decimal)units / parcelProperties.Units)).ToCurrency(RoundingRule.Round);
costBaseChange = (parcelProperties.CostBase * ((decimal)units / parcelProperties.Units)).ToCurrency(RoundingRule.Round);
}
parcel.Change(date, -units, -amountChange, -costBaseChange, transaction);
// Adjust holding
var holdingProperties = Properties[date];
HoldingProperties newProperties;
if (units == holdingProperties.Units)
{
End(date);
newProperties = new HoldingProperties(0, 0.00m, 0.00m);
}
else
{
newProperties = new HoldingProperties(holdingProperties.Units - units, holdingProperties.Amount - amountChange, holdingProperties.CostBase - costBaseChange);
}
_Properties.Change(date, newProperties);
OnCgtEventOccured(date, Stock, units, costBaseChange, amount, capitalGain, cgtMethod, transaction);
}
