public RawDate AddDays(RawDate rawDate, int numberOfDaysToAdd)
{
if (numberOfDaysToAdd == 0)
{
return(rawDate);
}
if (numberOfDaysToAdd < 0)
{
return(new RawDate());
}
if (!rawDate.IsDateValid(rawDate.rawDate))
{
return(new RawDate());
}
string [] splitDate = rawDate.rawDate.Split('/');
int days = int.Parse(splitDate[0]);
int month = int.Parse(splitDate[1]);
int year = int.Parse(splitDate[2]);
var months = Month.GetMonths();
days += numberOfDaysToAdd;
int daysThisMonth = months.Find(m => m.MonthNumber == month).DaysInMonth;
if (LeapYear.IsLeapYear(year) && month == 2)
{
daysThisMonth += 1;
}
while (days > daysThisMonth)
{
days = days - daysThisMonth;
if (month == 12)
{
month = 1;
year++;
}
else
{
month++;
}
daysThisMonth = months.Find(m => m.MonthNumber == month).DaysInMonth;
if (LeapYear.IsLeapYear(year) && month == 2)
{
Debug.WriteLine("leapyear" + year);
daysThisMonth += 1;
}
}
return(new RawDate()
{
rawDate = days.ToString("0#") + "/" + month.ToString("0#") + "/" + year.ToString("0000")
});
}
public bool IsDateValid(string date)
{
if (string.IsNullOrEmpty(date))
{
return(false);
}
if (date.Length != 10)
{
return(false);
}
if (Regex.Matches(date, "/").Count != 2)
{
return(false);
}
string numbersWithoutForwardSlashes = date.Replace(@"/", "");
int i;
if (!int.TryParse(numbersWithoutForwardSlashes, out i))
{
return(false);
}
string [] splitDate = date.Split('/');
int monthNumber = ParseString(splitDate[1]);
if (monthNumber > 12 || monthNumber < 1)
{
return(false);
}
int dayNumber = ParseString(splitDate[0]);
if (dayNumber > 31 || dayNumber < 1)
{
return(false);
}
int year = ParseString(splitDate[2]);
if (year < 1)
{
return(false);
}
var months = Month.GetMonths();
var daysInMonth = months.Find(m => m.MonthNumber == monthNumber).DaysInMonth;
if (monthNumber == 2 && LeapYear.IsLeapYear(year) && daysInMonth < 29)
{
daysInMonth++;
}
if (dayNumber > daysInMonth)
{
return(false);
}
return(true);
}