public void CalculateBuildingCharge(ChargeBuilding building, IEnumerable <ChargeExpense> expenses)
{
var items = new List <ChargeItem>();
foreach (var expense in expenses)
{
var shares = expense.CalculateExpenseShares(building, this, ApartmentId);
items.AddRange(shares.Select(s => new ChargeItem {
Amount = s.amount,
ExpenseId = expense.ExpenseId,
PayerId = s.payerId
}));
}
Items = items;
}
public IEnumerable <(int payerId, int amount)> CalculateExpenseShares(ChargeBuilding building, Charge charge, int apartmentId)
{
var intersectionStart = charge.From > From ? charge.From : From;
var intersectionEnd = charge.To > To ? To : charge.To;
if ((To - From).Days == 0)
{
throw new InvalidOperationException("Invalid chagre was requested ");
}
var currentRangeAmount = Amount * (intersectionEnd - intersectionStart).Days / (To - From).Days;
var buildingService = new BuildingTimeSpanInfoService(building, From, To);
return(Formula.CalculateShares(buildingService, currentRangeAmount, apartmentId));
}
public BuildingTimeSpanInfoService(ChargeBuilding building, DateTime from, DateTime to)
{
Building = building;
From = from;
To = to;
}
