shoc-backend/SeaHaven.Services/Helpers/WorkOrderOperationalWeek.cs

namespace SeaHaven.Services.Helpers
{
    public static class WorkOrderOperationalWeek
    {
        public static DateOnly GetMondayOfWeek(DateOnly date)
        {
            var daysFromMonday = ((int)date.DayOfWeek + 6) % 7;
            return date.AddDays(-daysFromMonday);
        }

        public static DateOnly GetPreviousOperationalWeekStart(DateTime utcNow)
            => GetMondayOfWeek(DateOnly.FromDateTime(utcNow)).AddDays(-7);

        public static DateOnly GetOperationalWeekEnd(DateOnly weekStartMonday)
            => weekStartMonday.AddDays(4);

        public static string BuildWeekCorrelationId(DateOnly sourceWeekStart)
            => $"week:{sourceWeekStart:yyyy-MM-dd}";
    }
}