internal void Merge(BudgetData b)
{
this.budget += b.budget;
this.actual += b.actual;
this.average += b.average;
budgeted.AddRange(b.budgeted);
}
public BudgetData GetBudgetData(DateTime date, string name)
{
BudgetData data;
if (!map.TryGetValue(name, out data))
{
// starting a new budget month
data = new BudgetData(name);
data.BudgetDate = date;
map[name] = data;
}
return(data);
}
private BudgetData AddTransaction(Transaction t, bool isCategoryTransfer)
{
// We do not use "transaction.Date" because sometimes a transaction can be pulled into a different month's budget because it makes more
// sense depending on what the transaction is about. For example you might buy an expensive item on the 31st of the month and return it
// on the 3rd of the next month because it was defective. This would normally create a spike in your budget graph and a weird profit in the
// next month, so instead of that you can just move the transaction from the 3rd into the previous month's budget balance and so it disappears
// completely rather than creating noise in your budget.
DateTime date = t.BudgetBalanceDate.HasValue ? t.BudgetBalanceDate.Value : new DateTime(t.Date.Year, t.Date.Month, 1);
string name = date.ToString("MM/yyyy");
BudgetData data = null;
if (isCategoryTransfer)
{
// then this was a budget transfer into the category
data = GetBudgetData(date, name);
data.AddBudget(t);
}
else if (t.IsSplit)
{
bool added = false;
foreach (Split s in t.Splits)
{
if (!(s.IsBudgeted))
{
continue;
}
if (ExpenseCategoryMatchesFilter(s.Category))
{
data = GetBudgetData(date, name);
if (!added)
{
data.Add(t);
added = true;
}
data.Actual -= (double)s.amount;
sum += (double)s.amount;
}
}
}
else if (ExpenseCategoryMatchesFilter(t.Category))
{
data = GetBudgetData(date, name);
data.AddActual(t);
sum -= (double)t.amount;
}
return(data);
}