admin: add common-code crud and business-day rules

2026-07-02 10:27:57 +09:00
parent df4c555dd1
commit 1839c2c3d1
17 changed files with 628 additions and 170 deletions
@@ -0,0 +1,88 @@
+namespace TaxBaik.Web.Components.Admin.Shared;
+
+public static class BusinessDayCalculator
+{
+    private sealed record HolidayWindow(DateOnly Start, DateOnly End)
+    {
+        public IEnumerable<DateOnly> Dates()
+        {
+            for (var date = Start; date <= End; date = date.AddDays(1))
+            {
+                yield return date;
+            }
+        }
+    }
+
+    private static readonly HolidayWindow[] HolidayWindows =
+    {
+        new(new DateOnly(2026, 1, 1), new DateOnly(2026, 1, 1)),
+        new(new DateOnly(2026, 2, 16), new DateOnly(2026, 2, 18)),
+        new(new DateOnly(2026, 3, 1), new DateOnly(2026, 3, 2)),
+        new(new DateOnly(2026, 5, 5), new DateOnly(2026, 5, 5)),
+        new(new DateOnly(2026, 6, 6), new DateOnly(2026, 6, 6)),
+        new(new DateOnly(2026, 8, 15), new DateOnly(2026, 8, 17)),
+        new(new DateOnly(2026, 9, 24), new DateOnly(2026, 9, 26)),
+        new(new DateOnly(2026, 10, 3), new DateOnly(2026, 10, 5)),
+        new(new DateOnly(2026, 10, 9), new DateOnly(2026, 10, 9)),
+        new(new DateOnly(2026, 12, 25), new DateOnly(2026, 12, 25))
+    };
+
+    private static readonly HashSet<DateOnly> HolidayDates = BuildHolidayDates();
+
+    public static DateOnly GetEffectiveDueDate(DateOnly dueDate)
+    {
+        var effectiveDate = dueDate;
+        while (!IsBusinessDay(effectiveDate))
+        {
+            effectiveDate = effectiveDate.AddDays(1);
+        }
+
+        return effectiveDate;
+    }
+
+    public static int GetDday(DateOnly dueDate, DateOnly? referenceDate = null)
+    {
+        var today = referenceDate ?? DateOnly.FromDateTime(DateTime.Today);
+        var effectiveDueDate = GetEffectiveDueDate(dueDate);
+        return effectiveDueDate.DayNumber - today.DayNumber;
+    }
+
+    public static bool IsBusinessDay(DateOnly date)
+        => date.DayOfWeek is not DayOfWeek.Saturday and not DayOfWeek.Sunday
+           && !HolidayDates.Contains(date);
+
+    private static HashSet<DateOnly> BuildHolidayDates()
+    {
+        var holidays = new HashSet<DateOnly>();
+
+        foreach (var window in HolidayWindows)
+        {
+            foreach (var date in window.Dates())
+            {
+                holidays.Add(date);
+            }
+        }
+
+        // 주말과 연속 공휴일 뒤에 붙는 대체휴일을 다음 영업일로 자동 확장한다.
+        foreach (var window in HolidayWindows)
+        {
+            foreach (var date in window.Dates())
+            {
+                if (date.DayOfWeek is not DayOfWeek.Saturday and not DayOfWeek.Sunday)
+                {
+                    continue;
+                }
+
+                var substitute = date.AddDays(1);
+                while (substitute.DayOfWeek is DayOfWeek.Saturday or DayOfWeek.Sunday || holidays.Contains(substitute))
+                {
+                    substitute = substitute.AddDays(1);
+                }
+
+                holidays.Add(substitute);
+            }
+        }
+
+        return holidays;
+    }
+}