public async Task <IEnumerable <KeyValuePair <int, decimal> > > SumAmountByDayOfWeek(ExpenseSumGetBinding binding)
{
using (var context = GetMainContext())
{
var tasks = Enumerable.Range(0, 7)
.Select(x => (DayOfWeek)x)
.Where(x => binding.Day == null || binding.Day.Contains(x))
.ToList()
.Select(x => new KeyValuePair <DayOfWeek, Task <decimal> >(
x,
SumAmount(binding.OverrideDay(x)))
)
.ToList();
await Task.WhenAll(tasks.Select(x => x.Value));
return(tasks.Select(x => new KeyValuePair <int, decimal>(x.Key == DayOfWeek.Sunday ? 6 : (int)x.Key - 1, x.Value.Result))
.OrderBy(x => x.Key));
}
}
