public BudgetViewMonth GetLastBudgetViewMonth(DateTime month, out bool exactMatch)
{
if (_lastResult == null)
{
RecalculateCache();
}
BudgetViewMonth budgetViewMonth = null;
if (_lastResult.Months.TryGetValue(month, out budgetViewMonth))
{
exactMatch = true;
return(budgetViewMonth);
}
int index = _lastResult.MonthsByDate.BinarySearch(m => m.Month, month);
index = ~index;
exactMatch = false;
if (index == 0)
{
return(null);
}
return(_lastResult.MonthsByDate[index - 1]);
}
private void CalculateMonthBalances(List <BudgetViewMonth> monthsOrdered)
{
BudgetViewMonth previousMonth = null;
foreach (var currentMonth in monthsOrdered)
{
if (previousMonth != null)
{
bool isLastMonth = currentMonth.Month.AddMonths(-1).FirstDayOfMonth() == previousMonth.Month;
currentMonth.OverUnderBudgetedPreviousMonth = previousMonth.AvailableToBudget;
if (!isLastMonth)
{
currentMonth.OverUnderBudgetedPreviousMonth -= previousMonth.OverspentPreviousMonth;
}
}
currentMonth.AvailableToBudget = currentMonth.Income - currentMonth.Budgeted + currentMonth.OverspentPreviousMonth + currentMonth.OverUnderBudgetedPreviousMonth;
previousMonth = currentMonth;
}
}
private Dictionary <DateTime, BudgetViewMonth> InitializeMonths(Dictionary <DateTime, List <BudgetViewCategoryMonth> > categoriesByMonth, TransactionDictionary groupedTransactions)
{
Dictionary <DateTime, BudgetViewMonth> months = groupedTransactions.Where(kvp => kvp.Key.EntityType == nameof(IncomeCategory)).ToDictionary(kvp => kvp.Key.FirstDayOfMonth, kvp => new BudgetViewMonth(kvp.Key.FirstDayOfMonth)
{
Income = kvp.Value
});
foreach (var category in categoriesByMonth)
{
BudgetViewMonth month = null;
BudgetViewMonth nextMonth = null;
DateTime nextMonthDate = category.Key.AddMonths(1).FirstDayOfMonth();
months.TryGetValue(nextMonthDate, out nextMonth);
if (!months.TryGetValue(category.Key, out month))
{
month = new BudgetViewMonth(category.Key);
months[category.Key] = month;
}
foreach (var categoryMonth in category.Value)
{
month.Budgeted += categoryMonth.AmountBudgeted;
if (categoryMonth.EndBalance < 0M && categoryMonth.NegativeBalanceHandling == NegativeBalanceHandlingTypes.AvailableToBudget)
{
if (nextMonth == null)
{
nextMonth = new BudgetViewMonth(nextMonthDate);
months[nextMonthDate] = nextMonth;
}
nextMonth.OverspentPreviousMonth += categoryMonth.EndBalance;
}
}
}
return(months);
}
