private void SetLastRemainderDateOf(BudgetWeek week)
{
var lastRemainder = Remainders[week].LastOrDefault();
if (lastRemainder != null)
{
lastRemainderDate[week] = lastRemainder.Date;
}
else
{
lastRemainderDate[week] = week.FirstDay.AddDays(-1);
}
}
private void CalculateRemaindersForDates(BudgetWeek week, IEnumerable <DateTime> dates)
{
foreach (var date in dates)
{
var calculatedRemainder =
PriorWeekRemainder(week) -
DayEnvelopeSize * ((date - week.FirstDay).Days + 1);
var period = new Period(week.FirstDay, date.AddDays(1));
var remainder = calculatedRemainder +
CashMovements[period].Sum(_ => _.Amount) +
MonthlyCashMovements[period].Sum(_ => _.Amount);
budget.SetRemainder(date, remainder);
}
}
private void CalculateTotalRemainders()
{
for (var week = new BudgetWeek(Period.From); week.From < Period.To; week = new BudgetWeek(week.To))
{
budget.AddWeek(week);
SetLastRemainderDateOf(week);
var daysToCalculate = new Set <DateTime> {
week.FirstDay, week.LastDay
};
daysToCalculate.AddRange(CashInvestmentDates(week));
daysToCalculate.AddRange(MonthlyExpensesDates(week));
CalculateRemaindersForDates(week, daysToCalculate);
}
budgetWeeks = new DatedSet <BudgetWeek>(budget.Weeks);
}
internal void AddWeek(BudgetWeek week)
{
weeks.Add(week);
}
private static IEnumerable <DateTime> DatesWithin <T>(BudgetWeek week, DatedSet <T> transfers) where T : IDated
{
return(transfers[week].Convert(i => i.Date).Distinct());
}
private IEnumerable <DateTime> MonthlyExpensesDates(BudgetWeek week)
{
return(DatesWithin(week, MonthlyCashMovements));
}
private IEnumerable <DateTime> CashInvestmentDates(BudgetWeek week)
{
return(DatesWithin(week, CashMovements));
}
private int PriorWeekRemainder(BudgetWeek week)
{
return(budget.GetRemainder(week.FirstDay.AddDays(-1)));
}