private TransactionBalance[] GetTransactions(TimeGroupingType grouping, DateTime minDate, DateTime maxDate,
TransactionTypeSelection selection)
{
var groupingSelector = GetGroupingSelector(grouping);
Func <Transaction, bool> valuesPicker = null;
switch (selection)
{
case TransactionTypeSelection.Income:
valuesPicker = x => (ShowTransfers ? x.ValueWithSign : x.ValueAsProfit) > 0;
break;
case TransactionTypeSelection.Outcome:
valuesPicker = x => (ShowTransfers ? x.ValueWithSign : x.ValueAsProfit) < 0;
break;
case TransactionTypeSelection.Balance:
valuesPicker = x => true;
break;
}
if (valuesPicker == null)
{
return(new TransactionBalance[0]);
}
return(FillMissingEntriesWithZeroValue(
MatchingTransactions
.Where(valuesPicker)
.GroupBy(x => groupingSelector(x.BookDate))
.Select(x => new TransactionBalance(x.Key, x.Sum(y => (ShowTransfers ? y.ValueWithSign : y.ValueAsProfit))))
.OrderBy(x => x.BookDate), minDate, maxDate, grouping));
}
private static Func <DateTime, DateTime> GetGroupingSelector(TimeGroupingType grouping)
{
switch (grouping)
{
case TimeGroupingType.Month:
return(x => new DateTime(x.Year, x.Month, 1));
case TimeGroupingType.Year:
return(x => new DateTime(x.Year, 1, 1));
}
return(null);
}
private void SetTwoColorArea(TransactionBalance[] values, PlotModel model, OxyColor color, TimeGroupingType groupingType)
{
//lets make it rectangle area by adding same value and the end of the month
var rectValues = CreateDuplicateTransactionBalancesAtEndOfGroupingPeriod(values, groupingType);
model.Series.Add(new TwoColorAreaSeries
{
ItemsSource = rectValues,
Limit = 0,
Color = color,
Color2 = OxyColors.Red,
Mapping = x => new DataPoint(DateTimeAxis.ToDouble(((TransactionBalance)x).BookDate),
(double)((TransactionBalance)x).Value),
TrackerFormatString = groupingType == TimeGroupingType.Month
? _areaTrackerMonthFormatString
: _areaTrackerYearFormatString
});
}
private static TransactionBalance[] CreateDuplicateTransactionBalancesAtEndOfGroupingPeriod(TransactionBalance[] values,
TimeGroupingType grouping)
{
Func <TransactionBalance, TransactionBalance> selector = null;
switch (grouping)
{
case TimeGroupingType.Month:
selector = x => new TransactionBalance(x.BookDate.AddMonths(1).AddSeconds(-1), x.Value);
break;
case TimeGroupingType.Year:
selector = x => new TransactionBalance(x.BookDate.AddYears(1).AddSeconds(-1), x.Value);
break;
}
if (selector == null)
{
return(values);
}
var rectValues = values.Concat(values.Select(selector))
.OrderBy(x => x.BookDate)
.ToArray();
return(rectValues);
}
private static TransactionBalance[] FillMissingEntriesWithZeroValue(IEnumerable <TransactionBalance> values, DateTime minDate,
DateTime maxDate, TimeGroupingType grouping)
{
var selector = GetGroupingSelector(grouping);
var dict = values.ToDictionary(x => selector(x.BookDate), x => x.Value);
int startMonth = grouping == TimeGroupingType.Month ? minDate.Month : 1;
var actualDate = new DateTime(minDate.Year, startMonth, 1);
while (actualDate < maxDate)
{
if (!dict.ContainsKey(actualDate))
{
dict[actualDate] = 0;
}
switch (grouping)
{
case TimeGroupingType.Month:
actualDate = actualDate.AddMonths(1);
break;
case TimeGroupingType.Year:
actualDate = actualDate.AddYears(1);
break;
}
}
values = dict.OrderBy(x => x.Key).Select(x => new TransactionBalance(x.Key, x.Value)).ToArray();
return(values.ToArray());
}