public static bool IsNundinae(this RomanDateTime date)
{
var dateTime = date.DateTimeData;
var nundinae = ReturnNundinaeForYear(dateTime);
return(nundinae == date.NundinalLetter);
}
public static RomanDateTime PreviousNundinae(this RomanDateTime date)
{
var dateTime = date.DateTimeData;
var nundinae = ReturnNundinaeForYear(dateTime);
var daysFrom = (int)nundinae - (int)date.NundinalLetter;
return(date.AddDays(daysFrom >= 0 ? -(8 - Math.Abs(daysFrom)) : daysFrom));
}
public static RomanDateTime NextNundinae(this RomanDateTime date)
{
var dateTime = date.DateTimeData;
var nundinae = ReturnNundinaeForYear(dateTime);
var daysUntil = (int)nundinae - (int)date.NundinalLetter;
return(date.AddDays(daysUntil <= 0 ? 8 - Math.Abs(daysUntil) : daysUntil));
}
public static RomanDateTime NextSetDay(this RomanDateTime date, PrincipalDays?setDay = null)
{
var dateTime = date.DateTimeData;
var daysToAdd = date.DaysUntilPrincipalDay.Value != 0 ? date.DaysUntilPrincipalDay.Value - 1 : 0;
var currSetDay = date.RomanSetDay.SetDay;
var nextMonth = RomanMonths.GetRomanMonth(((Months)dateTime.Month).Next());
var currMonth = RomanMonths.GetRomanMonth((Months)dateTime.Month);
if (setDay.HasValue)
{
if ((setDay.Value == currSetDay && daysToAdd == 0) || (setDay.Value < currSetDay))
{
if (nextMonth.Month == Months.Ianuarius)
{
dateTime = dateTime.PlusYears(1);
}
if (setDay.Value == PrincipalDays.Kalendae)
{
return(new RomanDateTime(dateTime.Year, (int)nextMonth.Month, 1));
}
if (setDay.Value == PrincipalDays.Nonae)
{
return(new RomanDateTime(dateTime.Year, (int)nextMonth.Month, nextMonth.Nonae));
}
if (setDay.Value == PrincipalDays.Idus)
{
return(new RomanDateTime(dateTime.Year, (int)nextMonth.Month, nextMonth.Idus));
}
}
else if (setDay.Value > currSetDay)
{
if (setDay.Value == PrincipalDays.Nonae)
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Nonae));
}
if (setDay.Value == PrincipalDays.Idus)
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Idus));
}
}
}
if (daysToAdd == 0)
{
if (currSetDay == PrincipalDays.Kalendae)
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Nonae));
}
if (currSetDay == PrincipalDays.Nonae)
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Idus));
}
if (currSetDay == PrincipalDays.Idus)
{
if (nextMonth.Month == Months.Ianuarius)
{
dateTime = dateTime.PlusYears(1);
}
return(new RomanDateTime(dateTime.Year, (int)nextMonth.Month, 1));
}
}
return(date.AddDays(daysToAdd));
}
public static RomanDateTime PreviousSetDay(this RomanDateTime date, PrincipalDays?setDay = null)
{
var dateTime = date.DateTimeData;
var currSetDay = date.RomanSetDay.SetDay;
var daysUntil = date.DaysUntilPrincipalDay.Value;
var prevMonth = RomanMonths.GetRomanMonth(((Months)dateTime.Month).Previous());
var currMonth = RomanMonths.GetRomanMonth((Months)dateTime.Month);
if (setDay.HasValue)
{
if (setDay.Value == PrincipalDays.Kalendae)
{
if (currSetDay == PrincipalDays.Kalendae && daysUntil == 0)
{
if (prevMonth.Month == Months.December)
{
dateTime = dateTime.PlusYears(-1);
}
return(new RomanDateTime(dateTime.Year, (int)prevMonth.Month, 1));
}
return(new RomanDateTime(dateTime.Year, dateTime.Month, 1));
}
if (setDay.Value == PrincipalDays.Nonae)
{
if ((currSetDay == PrincipalDays.Kalendae && daysUntil == 0) ||
(currSetDay == PrincipalDays.Nonae && daysUntil >= 0))
{
if (prevMonth.Month == Months.December)
{
dateTime = dateTime.PlusYears(-1);
}
return(new RomanDateTime(dateTime.Year, (int)prevMonth.Month, prevMonth.Nonae));
}
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Nonae));
}
else
{
if ((currSetDay == PrincipalDays.Kalendae && daysUntil == 0) ||
(currSetDay == PrincipalDays.Nonae && daysUntil >= 0) ||
(currSetDay == PrincipalDays.Idus && daysUntil >= 0))
{
if (prevMonth.Month == Months.December)
{
dateTime = dateTime.PlusYears(-1);
}
return(new RomanDateTime(dateTime.Year, (int)prevMonth.Month, prevMonth.Idus));
}
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Idus));
}
}
else
{
if (currSetDay == PrincipalDays.Kalendae)
{
if (daysUntil == 0)
{
if (prevMonth.Month == Months.December)
{
dateTime = dateTime.PlusYears(-1);
}
return(new RomanDateTime(dateTime.Year, (int)prevMonth.Month, prevMonth.Idus));
}
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Idus));
}
if (currSetDay == PrincipalDays.Nonae)
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, 1));
}
else
{
return(new RomanDateTime(dateTime.Year, dateTime.Month, currMonth.Nonae));
}
}
}