egwcorelib/EgwCoreLib.Utils/GestCalendario.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EgwCoreLib.Utils
{
    /// <summary>
    /// Utility gestione calendario
    /// </summary>
    public class GestCalendario
    {
        #region Public Methods

        /// <summary>
        /// Calcolo data domenica di pasqua dell'YearReq indicato
        /// </summary>
        /// <param name="year"></param>
        /// <returns></returns>
        public static DateTime GetEasterSunday(int year)
        {
            int num = 0;
            int num2 = 0;
            int num3 = year % 19;
            int num4 = year / 100;
            int num5 = (num4 - num4 / 4 - (8 * num4 + 13) / 25 + 19 * num3 + 15) % 30;
            int num6 = num5 - num5 / 28 * (1 - num5 / 28 * (29 / (num5 + 1)) * ((21 - num3) / 11));
            num = num6 - (year + year / 4 + num6 + 2 - num4 + num4 / 4) % 7 + 28;
            num2 = 3;
            if (num > 31)
            {
                num2++;
                num -= 31;
            }

            return new DateTime(year, num2, num);
        }

        /// <summary>
        /// Elenco festività (limitato ad ITALIA)
        /// </summary>
        /// <param name="YearReq"></param>
        /// <param name="CurrCult"></param>
        /// <returns></returns>
        public static List<EventDetail> ListHolidaysIta(int YearReq)
        {
            List<EventDetail> list = new List<EventDetail>();
            list.Add(new EventDetail
            {
                What = "Capodanno",
                When = new DateTime(YearReq, 1, 1)
            });
            list.Add(new EventDetail
            {
                What = "Epifania",
                When = new DateTime(YearReq, 1, 6)
            });
            list.Add(new EventDetail
            {
                What = "Lavoro",
                When = new DateTime(YearReq, 5, 1)
            });
            list.Add(new EventDetail
            {
                What = "Ferragosto",
                When = new DateTime(YearReq, 8, 15)
            });
            list.Add(new EventDetail
            {
                What = "Ognissanti",
                When = new DateTime(YearReq, 11, 1)
            });
            list.Add(new EventDetail
            {
                What = "Immacolata",
                When = new DateTime(YearReq, 12, 8)
            });
            list.Add(new EventDetail
            {
                What = "Natale",
                When = new DateTime(YearReq, 12, 25)
            });
            list.Add(new EventDetail
            {
                What = "S.Stefano",
                When = new DateTime(YearReq, 12, 26)
            });
            list.Add(new EventDetail
            {
                What = "Pasqua",
                When = GetEasterSunday(YearReq)
            });
            list.Add(new EventDetail
            {
                What = "Pasquetta",
                When = GetEasterSunday(YearReq).AddDays(1.0)
            });
            list.Add(new EventDetail
            {
                What = "Liberazione",
                When = new DateTime(YearReq, 4, 25)
            });
            list.Add(new EventDetail
            {
                What = "Repubblica",
                When = new DateTime(YearReq, 6, 2)
            });
            return list;
        }

        #endregion Public Methods

        #region Public Classes

        public class EventDetail
        {
            #region Public Properties

            public string What { get; set; } = "";
            public DateTime When { get; set; }

            #endregion Public Properties
        }

        #endregion Public Classes
    }
}