/// <summary>
/// Determines the next date
/// </summary>
public static (int, int, int) IncreaseDate(string value_day, string value_month, string value_year, string count_day)
{
int real_day_month_next = 0;
int leftover_days = 0;
int last_day_month = 0;
bool isNumberDay = int.TryParse(value_day, out int day);
bool isNumberMonth = int.TryParse(value_month, out int month);
bool isNumberYear = int.TryParse(value_year, out int year);
bool isNumberCountDays = int.TryParse(count_day, out int amount_days);
bool isDate = AuxiliaryMethods.IsCorrectDate(isNumberDay, isNumberMonth, isNumberYear, day, month, year);
//Validating date
if (!isDate || !isNumberCountDays)
{
throw new ArgumentException("Error, incorrect date");
}
last_day_month = AuxiliaryMethods.LastDayMonthNext(month - 1, year);
//Difference between the total days of the month and the number of days
leftover_days = last_day_month - day;
if (leftover_days >= amount_days)
{
day = day + amount_days;
return(day, month, year);
}
real_day_month_next = amount_days - leftover_days;
last_day_month = AuxiliaryMethods.LastDayMonthNext(month, year);
while (true)
{
if (real_day_month_next > last_day_month)
{
if (month == 12)
{
month = 0;
year++;
}
month++;
real_day_month_next = real_day_month_next - last_day_month;
last_day_month = AuxiliaryMethods.LastDayMonthNext(month, year);
}
else
{
if (month == 12)
{
month = 1;
year++;
return(real_day_month_next, month, year);
}
else
{
month++;
return(real_day_month_next, month, year);
}
}
}
}
public static (int day, int month, int year) PreviousDate(string value_day, string value_month, string value_year)
{
bool isNumberDay = int.TryParse(value_day, out int day);
bool isNumberMonth = int.TryParse(value_month, out int month);
bool isNumberYear = int.TryParse(value_year, out int year);
bool isDate = AuxiliaryMethods.IsCorrectDate(isNumberDay, isNumberMonth, isNumberYear, day, month, year);
if (!isDate)
{
throw new ArgumentException("Error, incorrect date");
}
bool isLeapYear = AuxiliaryMethods.IsLeapYear(year);
if (day == 1)
{
if (month == 1)
{
day = 31;
month = 12;
year = year - 1;
}
if (month == 4 || month == 6 || month == 9 || month == 11 || month == 2 || month == 8)
{
month = month - 1;
day = 31;
}
else if (month == 3)
{
if (!isLeapYear)
{
month = 2;
day = 28;
}
else
{
month = 2;
day = 29;
}
}
else if (month != 12 || day != 31)
{
month = month - 1;
day = 30;
}
}
else
{
day = day - 1;
}
return(day, month, year);
}
public static (int day, int month, int year) FollowingDate(string value_day, string value_month, string value_year)
{
int month_next = 0;
int day_next = 0;
int year_next = 0;
bool isNumberDay = int.TryParse(value_day, out int day);
bool isNumberMonth = int.TryParse(value_month, out int month);
bool isNumberYear = int.TryParse(value_year, out int year);
bool isDate = AuxiliaryMethods.IsCorrectDate(isNumberDay, isNumberMonth, isNumberYear, day, month, year);
if (!isDate)
{
throw new ArgumentException("Error, incorrect date");
}
bool isLeapYear = AuxiliaryMethods.IsLeapYear(year);
if ((day == 30 && (month == 4 || month == 6 || month == 9 || month == 11)) || (day == 29 && month == 2) || ((day == 28 && month == 2) && !isLeapYear) || day == 31)
{
month_next = month + 1;
day_next = 1;
}
else
{
day_next = day + 1;
month_next = month;
}
if (day_next == 1 && month_next == 13)
{
month_next = 1;
year_next = year + 1;
}
else
{
year_next = year;
}
return(day_next, month_next, year_next);
}
public static bool IsCorrectDate(string value_day, string value_month, string value_year)
{
bool isNumberDay = int.TryParse(value_day, out int day);
bool isNumberMonth = int.TryParse(value_month, out int month);
bool isNumberYear = int.TryParse(value_year, out int year);
bool isDate = AuxiliaryMethods.IsCorrectDate(isNumberDay, isNumberMonth, isNumberYear, day, month, year);
if (!isDate)
{
return(false);
}
bool isLeapYear = AuxiliaryMethods.IsLeapYear(year);
if ((day > 30 && (month == 4 || month == 6 || month == 9 || month == 11)) || (day > 29 && month == 2) || (day > 28 && month == 2 && year % 4 != 0) || (day == 29 && month == 2 && isLeapYear))
{
return(false);
}
else
{
return(true);
}
}
public static int DifferentTwoDates(string value_day, string value_month, string value_year, string value_day2, string value_month2, string value_year2)
{
int util_day = 0;
int util_month = 0;
int util_year = 0;
int last_day_month = 0;
int real_day_year = 0;
int cont_year_leap = 0;
int cont_year_no_leap = 0;
bool isNumberDay = int.TryParse(value_day, out int day);
bool isNumberMonth = int.TryParse(value_month, out int month);
bool isNumberYear = int.TryParse(value_year, out int year);
bool isNumberDay2 = int.TryParse(value_day2, out int second_day);
bool isNumberMonth2 = int.TryParse(value_month2, out int second_month);
bool isNumberYear2 = int.TryParse(value_year2, out int second_year);
bool isDate = AuxiliaryMethods.IsCorrectDate(isNumberDay, isNumberMonth, isNumberYear, day, month, year);
bool isDate2 = AuxiliaryMethods.IsCorrectDate(isNumberDay2, isNumberMonth2, isNumberYear2, second_day, second_month, second_year);
//Validating date
if (!isDate || !isDate2)
{
throw new ArgumentException("Error, incorrect date");
}
if ((second_day <= day && second_month == month && second_year == year) || (second_year < year) || second_month < month && second_year == year)
{ //In case the initial date is greater than the final date, it is reversed.
util_day = day;
util_month = month;
util_year = year;
day = second_day;
month = second_month;
year = second_year;
second_day = util_day;
second_month = util_month;
second_year = util_year;
}
int temp_year = year + 1;
int first_latest_year = year;
if (year == second_year && month == second_month)
{
real_day_year = second_day - day;
return(real_day_year);
}
last_day_month = AuxiliaryMethods.LastDayMonthNext(month - 1, year);
real_day_year = last_day_month - day;
while (temp_year < second_year)
{
bool isLeapYear = AuxiliaryMethods.IsLeapYear(temp_year);
if (isLeapYear)
{
temp_year++;
cont_year_leap++;
}
else
{
temp_year++;
cont_year_no_leap++;
}
}
real_day_year = real_day_year + (cont_year_no_leap * 365 + cont_year_leap * 366);
while (true)
{
if (month != 12)
{
last_day_month = AuxiliaryMethods.LastDayMonthNext(month, year);
real_day_year = real_day_year + last_day_month;
month++;
}
if (month == 12 && first_latest_year == year)
{
month = 1;
year = second_year;
first_latest_year = year;
}
if ((month == second_month - 1 || month == second_month) && first_latest_year == second_year)
{
real_day_year = real_day_year + second_day;
return(real_day_year);
}
else if (month == 1 && first_latest_year == second_year)
{
last_day_month = AuxiliaryMethods.LastDayMonthNext(month - 1, year);
real_day_year = real_day_year + last_day_month;
}
}
}