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429 lines
17 KiB
429 lines
17 KiB
using System;
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using System.Globalization;
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using System.Text;
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using static System.DateTime;
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namespace Apewer
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{
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/// <summary>时钟。</summary>
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public static class ClockUtility
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{
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#region DateTime
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/// <summary>尝试转换内容为 DateTime 实例。</summary>
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public static Class<DateTime> DateTime(object value)
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{
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if (value is DateTime dt) return new Class<DateTime>(dt);
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if (value.IsNull()) return null;
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try
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{
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var text = value.ToString();
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var parsed = System.DateTime.TryParse(text, out var result);
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return parsed ? new Class<DateTime>(result) : null;
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}
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catch
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{
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return null;
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}
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}
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#endregion
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#region Fixed
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private static DateTime _zero = new DateTime(0L, DateTimeKind.Unspecified);
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private static DateTime _origin = NewOrigin(DateTimeKind.Unspecified);
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private static DateTime _utc_origin = NewOrigin(DateTimeKind.Utc);
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/// <summary>创建新的零值 DateTime 对象。</summary>
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public static DateTime Zero { get => _zero; }
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/// <summary>获取一个 DateTime 对象,该对象设置为 1970-01-01 00:00:00.000,表示为协调通用时间 (UTC)。</summary>
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public static DateTime UtcOrigin { get => _utc_origin; }
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/// <summary>获取一个 DateTime 对象,该对象设置为此计算机上的当前日期和时间,表示为本地时间。</summary>
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public static DateTime Now { get => System.DateTime.Now; }
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/// <summary>获取一个 DateTime 对象,该对象设置为此计算机上的当前日期和时间,表示为协调通用时间 (UTC)。</summary>
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public static DateTime UtcNow { get => System.DateTime.UtcNow; }
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/// <summary>创建一个 DateTime 对象,该对象设置为 1970-01-01 00:00:00.000。</summary>
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public static DateTime NewOrigin(DateTimeKind kind) => new DateTime(1970, 1, 1, 0, 0, 0, 0, kind);
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#endregion
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#region Clone
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/// <summary>克隆 DateTime 对象,并使用新的 Kind。</summary>
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/// <param name="dateTime">要克隆的 DateTime 对象。</param>
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/// <param name="kind">时间类型。</param>
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/// <returns>克隆后带有新 Kind 的 DateTime 对象。</returns>
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public static DateTime Clone(this DateTime dateTime, DateTimeKind kind)
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{
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return new DateTime(dateTime.Ticks, kind);
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}
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#endregion
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#region Round
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/// <summary>对齐时间,小于 <see cref="DateTimePart"/> 的部分将被舍弃。</summary>
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public static DateTime Round(this DateTime dateTime, DateTimePart datePart)
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{
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switch (datePart)
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{
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case DateTimePart.Year: return new DateTime(dateTime.Year, 1, 1, 0, 0, 0, 0, dateTime.Kind);
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case DateTimePart.Month: return new DateTime(dateTime.Year, dateTime.Month, 1, 0, 0, 0, 0, dateTime.Kind);
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case DateTimePart.Day: return new DateTime(dateTime.Year, dateTime.Month, dateTime.Day, 0, 0, 0, 0, dateTime.Kind);
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case DateTimePart.Hour: return new DateTime(dateTime.Year, dateTime.Month, dateTime.Day, dateTime.Hour, 0, 0, 0, dateTime.Kind);
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case DateTimePart.Minute: return new DateTime(dateTime.Year, dateTime.Month, dateTime.Day, dateTime.Hour, dateTime.Minute, 0, 0, dateTime.Kind);
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case DateTimePart.Second: return new DateTime(dateTime.Year, dateTime.Month, dateTime.Day, dateTime.Hour, dateTime.Minute, dateTime.Second, 0, dateTime.Kind);
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case DateTimePart.Millisecond: return dateTime;
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default: throw new ArgumentException($"指定的 {nameof(DateTimePart)} 不受支持。");
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}
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}
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#endregion
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#region Common
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/// <summary>判断指定年份是闰年。</summary>
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public static bool IsLeapYear(this int year)
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{
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if (year % 400 == 0) return true;
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if (year % 100 == 0) return false;
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if (year % 4 == 0) return true;
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return false;
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}
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/// <summary>判断指定年份是闰年。</summary>
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public static bool IsLeapYear(DateTime dateTime) => IsLeapYear(dateTime.Year);
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/// <summary>获取指定年月的天数。</summary>
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/// <exception cref="ArgumentOutOfRangeException" />
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public static int MonthDays(int year, int month)
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{
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switch (month)
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{
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case 1: case 3: case 5: case 7: case 8: case 10: case 12: return 31;
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case 4: case 6: case 9: case 11: return 30;
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case 2: return IsLeapYear(year) ? 29 : 28;
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default: throw new ArgumentOutOfRangeException(nameof(month));
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}
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}
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#endregion
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#region Stamp
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/// <summary>自定义从 DateTime 转为时间戳的方法。</summary>
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public static Func<DateTime, long> CustomToStamp { get; set; }
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/// <summary>自定义从时间戳转为 DateTime 的方法。</summary>
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public static Func<long, DateTime> CustomFromStamp { get; set; }
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/// <summary>获取当前本地时间的毫秒时间戳。</summary>
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public static long NowStamp { get => ToStamp(Now); }
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/// <summary>获取当前 UTC 的毫秒时间戳。</summary>
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public static long UtcStamp { get => ToStamp(UtcNow); }
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/// <summary>获取毫秒时间戳。当指定了 <see cref="CustomToStamp"/> 时将优先使用自定义的方法。</summary>
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/// <remarks>默认不判断参数的时区,与 <see cref="DateTimeKind.Unspecified"/> 相同。</remarks>
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public static long ToStamp(DateTime dateTime)
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{
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var converter = CustomToStamp;
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if (converter != null) return converter.Invoke(dateTime);
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var span = dateTime - _origin;
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var value = span.TotalMilliseconds;
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var stamp = Convert.ToInt64(Math.Floor(value));
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return stamp;
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}
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/// <summary>获取 UTC 毫秒时间戳</summary>
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public static long ToUtcStamp(DateTime dateTime)
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{
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if (dateTime.Kind == DateTimeKind.Local) dateTime = dateTime.ToUniversalTime();
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var span = dateTime - _utc_origin;
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var value = span.TotalMilliseconds;
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var stamp = Convert.ToInt64(Math.Floor(value));
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return stamp;
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}
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/// <summary>解析毫秒时间戳,获取 DateTime 对象。当指定了 <see cref="CustomFromStamp"/> 时将优先使用自定义的方法。</summary>
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/// <remarks>默认不判断系统时区,返回的结果是 <see cref="DateTimeKind.Unspecified"/>。</remarks>
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/// <exception cref="ArgumentOutOfRangeException"></exception>
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public static DateTime FromStamp(long stamp)
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{
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var converter = CustomFromStamp;
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if (converter != null) return converter.Invoke(stamp);
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return FromStamp(stamp, DateTimeKind.Unspecified, DateTimeKind.Unspecified);
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}
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/// <summary>从毫秒时间戳获取 DateTime 对象。</summary>
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/// <exception cref="ArgumentOutOfRangeException"></exception>
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public static DateTime FromStamp(long stamp, DateTimeKind stampKind, DateTimeKind dateTimeKind)
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{
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switch (dateTimeKind)
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{
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case DateTimeKind.Unspecified:
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switch (stampKind)
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{
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case DateTimeKind.Unspecified:
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case DateTimeKind.Utc:
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case DateTimeKind.Local:
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return _origin.AddMilliseconds(stamp);
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default:
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throw new ArgumentOutOfRangeException(nameof(stampKind));
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}
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case DateTimeKind.Utc:
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switch (stampKind)
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{
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case DateTimeKind.Unspecified:
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case DateTimeKind.Utc:
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return _utc_origin.AddMilliseconds(stamp);
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case DateTimeKind.Local:
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return NewOrigin(DateTimeKind.Local).AddMilliseconds(stamp).ToUniversalTime();
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default:
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throw new ArgumentOutOfRangeException(nameof(stampKind));
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}
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case DateTimeKind.Local:
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switch (stampKind)
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{
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case DateTimeKind.Unspecified:
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case DateTimeKind.Utc:
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return _utc_origin.AddMilliseconds(stamp).ToLocalTime();
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case DateTimeKind.Local:
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return NewOrigin(DateTimeKind.Local).AddMilliseconds(stamp);
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default:
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throw new ArgumentOutOfRangeException(nameof(stampKind));
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}
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default:
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throw new ArgumentOutOfRangeException(nameof(dateTimeKind));
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}
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}
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#endregion
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#region Text
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/// <summary>解析文本,获取 DateTime 对象。</summary>
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public static Class<DateTime> FromText(string text)
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{
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var str = text;
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if (string.IsNullOrEmpty(str)) return null;
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var utc = false;
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var lower = str.ToLower();
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if (lower.EndsWith(" utc"))
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{
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utc = true;
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str = str.Substring(0, str.Length - 4);
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}
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DateTime dt;
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if (!TryParse(str, out dt))
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{
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if (!str.Contains("-") && TryParseExact(str, "yyyy-M-d", null, DateTimeStyles.None, out dt))
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{
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if (!str.Contains("/") && TryParseExact(str, "yyyy/M/d", null, DateTimeStyles.None, out dt))
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{
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return null;
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}
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}
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}
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if (utc) dt = new DateTime(dt.Ticks, DateTimeKind.Utc);
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return new Class<DateTime>(dt);
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}
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#endregion
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#region Lucid & Compact
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/// <summary>表示当前本地时间的文本,显示为易于阅读的格式。</summary>
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public static string LucidNow { get => Lucid(Now); }
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/// <summary>表示当前 UTC 的文本,显示为易于阅读的格式。</summary>
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public static string LucidUtc { get => Lucid(UtcNow); }
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/// <summary>表示当前本地日期的文本,显示为易于阅读的格式。</summary>
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public static string LucidDate { get { return Lucid(Now, true, false, false, false); } }
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/// <summary>表示当前本地时间的文本,显示为紧凑的格式。</summary>
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public static string CompactNow { get => Compact(Now); }
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/// <summary>表示当前 UTC 的文本,显示为紧凑的格式。</summary>
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public static string CompactUtc { get => Compact(UtcNow); }
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/// <summary>表示当前本地日期的文本,显示为紧凑的格式。</summary>
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public static string CompactDate { get { return Compact(Now, true, false, false, false); } }
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/// <summary>转换 DateTime 对象到易于阅读的文本。</summary>
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public static string Lucid(DateTime dateTime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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var sb = new StringBuilder();
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if (date) sb.Append(FormatDate(dateTime, true));
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if (time)
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{
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if (date) sb.Append(" ");
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sb.Append(FormatTime(dateTime, true, seconds, milliseconds));
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}
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var lucid = sb.ToString();
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return lucid;
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}
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/// <summary>转换 DateTime 对象到紧凑的文本。</summary>
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public static string Compact(DateTime dateTime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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var sb = new StringBuilder();
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if (date) sb.Append(FormatDate(dateTime, false));
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if (time)
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{
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sb.Append(FormatTime(dateTime, false, seconds, milliseconds));
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}
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var lucid = sb.ToString();
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return lucid;
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}
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private static string FormatDate(DateTime datetime, bool lucid)
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{
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var sb = new StringBuilder();
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var y = NumberUtility.Restrict(datetime.Year, 0, 9999);
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var m = NumberUtility.Restrict(datetime.Month, 1, 12);
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var d = NumberUtility.Restrict(datetime.Day, 1, MonthDays(y, m));
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if (y < 10) sb.Append("000");
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else if (y < 100) sb.Append("00");
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else if (y < 1000) sb.Append("0");
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sb.Append(y.ToString());
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if (lucid) sb.Append("-");
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if (m < 10) sb.Append("0");
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sb.Append(m.ToString());
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if (lucid) sb.Append("-");
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if (d < 10) sb.Append("0");
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sb.Append(d.ToString());
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var date = sb.ToString();
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return date;
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}
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private static string FormatTime(DateTime datetime, bool lucid, bool seconds, bool milliseconds)
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{
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var sb = new StringBuilder();
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var h = NumberUtility.Restrict(datetime.Hour, 0, 23);
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var m = NumberUtility.Restrict(datetime.Minute, 0, 59);
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var s = NumberUtility.Restrict(datetime.Second, 0, 59);
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var ms = NumberUtility.Restrict(datetime.Millisecond, 0, 999);
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if (h < 10) sb.Append("0");
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sb.Append(h.ToString());
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if (lucid) sb.Append(":");
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if (m < 10) sb.Append("0");
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sb.Append(m.ToString());
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if (seconds)
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{
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if (lucid) sb.Append(":");
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if (s < 10) sb.Append("0");
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sb.Append(s.ToString());
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if (milliseconds)
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{
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if (lucid) sb.Append(".");
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if (ms < 10) sb.Append("00");
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else if (ms < 100) sb.Append("0");
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sb.Append(ms.ToString());
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}
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}
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var time = sb.ToString();
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return time;
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}
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/// <summary>解析文本。</summary>
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/// <param name="text">要被解析的文本。</param>
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/// <param name="failed">解析失败时的获取方法。</param>
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public static Nullable<DateTime> Parse(string text, Func<DateTime> failed = null)
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{
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if (string.IsNullOrEmpty(text)) return null;
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// 使用默认解析。
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{
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if (TryParse(text, out DateTime dt)) return dt;
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}
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// 尝试解析 Lucid 格式。
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var byLucid = ParseLucid(text);
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if (byLucid != null) return byLucid;
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// 尝试 failed 回调。
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if (failed != null) return failed.Invoke();
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return null;
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}
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/// <summary>解析文本。</summary>
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public static Nullable<DateTime> ParseLucid(string lucid)
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{
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var failed = null as Nullable<DateTime>;
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if (lucid.IsEmpty()) return failed;
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int year = 0, month = 0, day = 0;
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if (lucid.Length < 10) return failed;
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if (lucid[4] != '-' || lucid[7] != '-') return failed;
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year = NumberUtility.Int32(lucid.Substring(0, 4));
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month = NumberUtility.Int32(lucid.Substring(5, 2));
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day = NumberUtility.Int32(lucid.Substring(8, 2));
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if (year < 1) return failed;
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if (month < 1 || month > 12) return failed;
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if (day < 1 || day > DaysInMonth(year, month)) return failed;
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int hour = 0, minute = 0, second = 0, milli = 0;
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if (lucid.Length >= 16)
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{
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if (lucid[10] != ' ' || lucid[13] != ':') return failed;
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hour = NumberUtility.Int32(lucid.Substring(11, 2));
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minute = NumberUtility.Int32(lucid.Substring(14, 2));
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if (hour < 0 || hour > 23) return failed;
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if (minute < 0 || minute > 59) return failed;
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if (lucid.Length >= 19)
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{
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if (lucid[16] != ':') return failed;
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second = NumberUtility.Int32(lucid.Substring(17, 2));
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if (second < 0 || second > 59) return failed;
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if (lucid.Length >= 23)
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{
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if (lucid[19] != '.') return failed;
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milli = NumberUtility.Int32(lucid.Substring(20, 3));
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if (milli < 0 || milli > 999) return failed;
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}
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}
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}
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var entity = new DateTime(year, month, day, hour, minute, second, milli);
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return new Nullable<DateTime>(entity);
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}
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#endregion
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}
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}
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