feat(bll, dal): WeekendDayService + БД. CalendarService - получение рабочих дней за период

PARR.BLL/Services/Interfaces/ICalendarService.cs

@@ -1,13 +1,16 @@
-
-using PARR.BLL.Services.Implementations;
-
-namespace PARR.BLL.Services.Interfaces
+namespace PARR.BLL.Services.Interfaces
 {
+    public delegate IQueryable<DateOnly> GetWeekendsDelegate(DateOnly start, DateOnly end);
+
     public interface ICalendarService
     {
-        
-        Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, GetWeekendsDelegate getWeekends);
-        //Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, Action<List<DateOnly>> getWeekends);
-        //Task<List<DateOnly>> GetWorkDatesForPeriodAsync(DateOnly startPeriod, TimeSpan distributionPeriod, Action getWeekends);
+        /// <summary>
+        /// Получить только рабочие дни за период
+        /// </summary>
+        /// <param name="startPeriod"></param>
+        /// <param name="distributionPeriod"></param>
+        /// <param name="getWeekends"></param>
+        /// <returns></returns>
+        List<DateOnly> GetWorkDatesForPeriod(DateOnly startPeriod, TimeSpan distributionPeriod, GetWeekendsDelegate getWeekends);
     }
 }