// THIS FILE IS PART OF ChineseCalendar PROJECT
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// THE ChineseCalendar PROJECT IS AN OPENSOURCE LIBRARY LICENSED UNDER THE MIT License.
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// COPYRIGHT (C) lpz. ALL RIGHTS RESERVED.
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// GITEE: https://gitee.com/lipz89/ChineseCalendar
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using System;
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using System.Collections.Generic;
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namespace ChineseCalendar
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{
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/// <summary>
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/// 节日
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/// </summary>
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public abstract class Festival
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{
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/// <summary> 节日名称 </summary>
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public string Name { get; protected set; }
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/// <summary> 描述 </summary>
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public string Description { get; protected set; }
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/// <summary> 节日设立年份 </summary>
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public int? FirstYear { get; protected set; }
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/// <summary> 月份 </summary>
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public int Month { get; protected set; }
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/// <summary> 日期 </summary>
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public int Day { get; protected set; }
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/// <summary>
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/// 获取指定公历日期前一个节日
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/// </summary>
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/// <param name="date">指定公历日期</param>
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/// <param name="containsThisDate">是否包含指定日期</param>
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/// <returns>前一个节日，null表示前面没有该节日</returns>
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public abstract DateTime? GetLastDate(DateTime? date = null, bool containsThisDate = false);
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/// <summary>
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/// 获取指定公历日期后一个节日
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/// </summary>
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/// <param name="date">指定公历日期</param>
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/// <param name="containsThisDate">是否包含指定日期</param>
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/// <returns>后一个节日，null表示后面没有该节日</returns>
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public abstract DateTime? GetNextDate(DateTime? date = null, bool containsThisDate = false);
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/// <summary>
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/// 判断指定公历日期是否本节日
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/// </summary>
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/// <param name="date">指定公历日期</param>
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/// <returns>true该日期是当前节日，否则不是</returns>
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public abstract bool IsThisFestival(DateTime date);
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/// <inheritdoc/>
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public override string ToString()
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{
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return this.Name;
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}
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/// <summary>
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/// 返回所有预定义的节日
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/// </summary>
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/// <returns></returns>
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public static IEnumerable<Festival> GetAllDefined()
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{
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yield return GregorianFestival.NewYearsDay;
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yield return GregorianFestival.TheTombWeepingDay;
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yield return GregorianFestival.InternationalWorkersDay;
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yield return GregorianFestival.TheNationalDay;
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yield return ChineseFestival.SpringFestival;
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yield return ChineseFestival.LanternFestival;
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yield return ChineseFestival.DragonBoatFestival;
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yield return ChineseFestival.QixiFestival;
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yield return ChineseFestival.MidAutumnFestival;
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yield return ChineseFestival.DoubleNinthFestival;
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yield return ChineseFestival.NewYearsEve;
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}
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}
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}
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