/// <summary>
/// Converts a <see cref="CalendarQuarter"/> to a <see cref="FiscalQuarter"/>.
/// </summary>
/// <param name="fiscalQuarter">The fiscal quarter to convert.</param>
/// <param name="calendarQuarterThatIsFirstFiscalQuarter">The calendar quarter that is associated with the first fiscal quarter for the company.</param>
/// <returns>
/// The calendar quarter associated with the specified fiscal quarter.
/// </returns>
/// <exception cref="ArgumentNullException"><paramref name="fiscalQuarter"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="calendarQuarterThatIsFirstFiscalQuarter"/> is <see cref="QuarterNumber.Invalid"/>.</exception>
public static CalendarQuarter ToCalendarQuarter(
this FiscalQuarter fiscalQuarter,
QuarterNumber calendarQuarterThatIsFirstFiscalQuarter)
{
if (fiscalQuarter == null)
{
throw new ArgumentNullException(nameof(fiscalQuarter));
}
if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Invalid)
{
throw new ArgumentOutOfRangeException(Invariant($"'{nameof(calendarQuarterThatIsFirstFiscalQuarter)}' == '{QuarterNumber.Invalid}'"), (Exception)null);
}
int offset;
if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q4)
{
offset = -1;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q3)
{
offset = -2;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q2)
{
offset = -3;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q1)
{
offset = 0;
}
else
{
throw new NotSupportedException("This quarter number is not supported: " + calendarQuarterThatIsFirstFiscalQuarter);
}
var result = new CalendarQuarter(fiscalQuarter.Year, fiscalQuarter.QuarterNumber);
result = result.Plus(offset);
return(result);
}
/// <summary>
/// Converts a <see cref="CalendarQuarter"/> to a <see cref="FiscalQuarter"/>.
/// </summary>
/// <param name="fiscalQuarter">The fiscal quarter to convert.</param>
/// <param name="calendarQuarterThatIsFirstFiscalQuarter">The calendar quarter that is associated with the first fiscal quarter for the company.</param>
/// <returns>
/// The calendar quarter associated with the specified fiscal quarter.
/// </returns>
/// <exception cref="ArgumentNullException"><paramref name="fiscalQuarter"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="calendarQuarterThatIsFirstFiscalQuarter"/> is <see cref="QuarterNumber.Invalid"/>.</exception>
public static CalendarQuarter ToCalendarQuarter(
this FiscalQuarter fiscalQuarter,
QuarterNumber calendarQuarterThatIsFirstFiscalQuarter)
{
if (fiscalQuarter == null)
{
throw new ArgumentNullException(nameof(fiscalQuarter));
}
if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Invalid)
{
throw new ArgumentException("calendar quarter that is first fiscal quarter is Invalid.", nameof(calendarQuarterThatIsFirstFiscalQuarter));
}
int offset;
if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q4)
{
offset = -1;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q3)
{
offset = -2;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q2)
{
offset = -3;
}
else if (calendarQuarterThatIsFirstFiscalQuarter == QuarterNumber.Q1)
{
offset = 0;
}
else
{
throw new NotSupportedException("This quarter number is not supported: " + calendarQuarterThatIsFirstFiscalQuarter);
}
var calendarQuarter = new CalendarQuarter(fiscalQuarter.Year, fiscalQuarter.QuarterNumber);
calendarQuarter = calendarQuarter.Plus(offset);
return(calendarQuarter);
}