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

PARR.DAL/Services/Implementations/WeekendDayService.cs

@@ -0,0 +1,32 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+using PARR.DAL.Context;
+using PARR.DAL.Models;
+using PARR.DAL.Services.Abstracts;
+using PARR.DAL.Services.Interfaces;
+
+namespace PARR.DAL.Services.Implementations
+{
+    internal class WeekendDayService : BaseService<WeekendDay>, IWeekendDayService
+    {
+        private readonly DataContext dataContext;
+        private readonly ILogger<WeekendDayService> logger;
+
+        protected override DbSet<WeekendDay> EntitySet => dataContext.WeekendDays;
+
+        protected override DataContext EntitiContext => dataContext;
+
+        public WeekendDayService(DataContext dataContext, ILogger<WeekendDayService> logger) : base(logger)
+        {
+            this.dataContext = dataContext;
+            this.logger = logger;
+        }
+
+
+        public IQueryable<DateOnly> GetWeekends(DateOnly start, DateOnly end)
+        {
+            return EntitySet.Where(t => t.Date >= start && t.Date <= end).Select(t => t.Date);
+        }
+
+    }
+}

PARR.DAL/Services/Interfaces/IWeekendDayService.cs

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+using PARR.DAL.Models;
+using PARR.DAL.Services.Interfaces.Base;
+
+namespace PARR.DAL.Services.Interfaces
+{
+    public interface IWeekendDayService : IBaseService<WeekendDay>
+    {
+        IQueryable<DateOnly> GetWeekends(DateOnly start, DateOnly end);
+    }
+}