public DateSystem(int hour, int day, DateMonthName month, int year)
{
dateHour = hour;
dateDay = day;
dateMonth = month;
dateYear = year;
dateWeekDay = GetWeakDay(day, month, year);
}
public DateWeekDayName GetWeakDay(int day, DateMonthName month, int year)
{
//get previous month days and add it
int previousMonthDays = 0;
switch (month)
{
case DateMonthName.February:
previousMonthDays = 31;
break;
case DateMonthName.March:
previousMonthDays = 59;
break;
case DateMonthName.April:
previousMonthDays = 90;
break;
case DateMonthName.May:
previousMonthDays = 120;
break;
case DateMonthName.June:
previousMonthDays = 151;
break;
case DateMonthName.July:
previousMonthDays = 181;
break;
case DateMonthName.August:
previousMonthDays = 212;
break;
case DateMonthName.September:
previousMonthDays = 243;
break;
case DateMonthName.October:
previousMonthDays = 273;
break;
case DateMonthName.November:
previousMonthDays = 304;
break;
case DateMonthName.December:
previousMonthDays = 334;
break;
}
//get get if current year is a leap year
int leapYearOffset = year % 4;
if (leapYearOffset == 0 && (int)month > 1)
{
previousMonthDays += 1;
}
//we dont count the current year for our days count, since it did not end yet and it is calculated above
year -= 1;
leapYearOffset = year % 4;
//get leap years days offset and add it
int leapYearDays = (year - leapYearOffset) / 4;
int totalDays = day + ((year) * 365) + leapYearDays + previousMonthDays;
totalDays %= 7;
DateWeekDayName weekDay = (DateWeekDayName)totalDays;
return(weekDay);
}
public void ChangeDay(int days)
{
dateDay += days;
//changeDayOfWeek
int currentDayOfWeek = (int)dateWeekDay;
int dayWeek = (days % 7) + currentDayOfWeek;
if (dayWeek > 6)
{
dayWeek -= 7;
}
dateWeekDay = (DateWeekDayName)dayWeek;
// if days more than 365 and year is not leap jump a whole year else if leap and more than 366 days jump a whole year And substract year amount to days saves a lot of iterations
// if more than 365, years = days - (dyas %365) / 365, amountofleapyears = ((year%4) + years) - ((year%4) + years)%4)) / 4, dateday = dateday - ((365 * years) + amountofleapyears)
if (dateDay > 365)
{
//first get 4 year loop
int fourYearDays = (365 * 4) + 1;
int fourYearsRest = dateDay % fourYearDays;
int fourYearsAmount = (dateDay - (fourYearsRest)) / fourYearDays;
Debug.Log(fourYearDays + " / " + fourYearsRest + " / " + fourYearsAmount + " / ");
//substract the 4 year loop
dateDay -= fourYearsAmount * fourYearDays;
ChangeYear(fourYearsAmount * 4);
//and now for the rest
//actual leap state
int actualLeapState = dateYear % 4;
//Compare to get the leap state for the rest and loop trough the rest
int yearsLeft = 0;
for (int i = actualLeapState; i < actualLeapState + 4; i++)
{
if (dateDay < 365 || (dateDay == 365 && i == 4))
{
break;
}
yearsLeft++;
dateDay -= 365;
if (i == 4)
{
dateDay -= 1;
}
}
ChangeYear(yearsLeft);
}
while (dateDay > 28)
{
if (dateMonth == DateMonthName.April || dateMonth == DateMonthName.June || dateMonth == DateMonthName.September || dateMonth == DateMonthName.November)
{
if (dateDay > 30)
{
dateDay -= 30;
}
else
{
break;
}
}
else if (dateMonth == DateMonthName.February)
{
if (dateYear % 4 == 0)
{
if (dateDay > 29)
{
dateDay -= 29;
}
else
{
break;
}
}
else
{
dateDay -= 28;
}
}
else
{
if (dateDay > 31)
{
dateDay -= 31;
}
else
{
break;
}
}
ChangeMonth(1);
}
}
