75 lines
2.3 KiB
C#
75 lines
2.3 KiB
C#
namespace TaxBaik.Application.Seasonal;
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public static class BusinessDayCalculator
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{
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private static readonly HashSet<DateOnly> HolidayDates = new()
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{
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// 2026
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new DateOnly(2026, 1, 1),
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new DateOnly(2026, 2, 16),
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new DateOnly(2026, 2, 17),
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new DateOnly(2026, 2, 18),
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new DateOnly(2026, 3, 1),
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new DateOnly(2026, 3, 2),
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new DateOnly(2026, 5, 5),
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new DateOnly(2026, 5, 25),
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new DateOnly(2026, 6, 6),
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new DateOnly(2026, 8, 15),
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new DateOnly(2026, 8, 16),
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new DateOnly(2026, 8, 17),
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new DateOnly(2026, 9, 24),
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new DateOnly(2026, 9, 25),
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new DateOnly(2026, 9, 26),
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new DateOnly(2026, 10, 3),
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new DateOnly(2026, 10, 4),
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new DateOnly(2026, 10, 5),
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new DateOnly(2026, 10, 9),
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new DateOnly(2026, 12, 25),
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// 2027
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new DateOnly(2027, 1, 1),
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new DateOnly(2027, 2, 6),
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new DateOnly(2027, 2, 7),
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new DateOnly(2027, 2, 8),
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new DateOnly(2027, 2, 9),
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new DateOnly(2027, 3, 1),
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new DateOnly(2027, 3, 2),
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new DateOnly(2027, 5, 5),
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new DateOnly(2027, 5, 13),
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new DateOnly(2027, 6, 6),
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new DateOnly(2027, 8, 15),
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new DateOnly(2027, 8, 16),
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new DateOnly(2027, 9, 14),
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new DateOnly(2027, 9, 15),
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new DateOnly(2027, 9, 16),
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new DateOnly(2027, 10, 3),
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new DateOnly(2027, 10, 4),
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new DateOnly(2027, 10, 9),
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new DateOnly(2027, 10, 10),
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new DateOnly(2027, 10, 11),
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new DateOnly(2027, 12, 25),
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new DateOnly(2027, 12, 26)
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};
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public static DateOnly GetEffectiveBusinessDate(DateOnly date)
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{
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var effectiveDate = date;
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while (!IsBusinessDay(effectiveDate))
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{
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effectiveDate = effectiveDate.AddDays(1);
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}
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return effectiveDate;
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}
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public static int GetBusinessDayDiff(DateOnly date, DateOnly referenceDate)
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{
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var effectiveDate = GetEffectiveBusinessDate(date);
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return effectiveDate.DayNumber - referenceDate.DayNumber;
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}
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private static bool IsBusinessDay(DateOnly date)
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=> date.DayOfWeek is not DayOfWeek.Saturday and not DayOfWeek.Sunday
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&& !HolidayDates.Contains(date);
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}
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