using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace FlexJobApi.Core
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{
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/// <summary>
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/// 时间工具
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/// </summary>
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public static class DateTimeUtils
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{
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/// <summary>
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/// 转时间
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/// </summary>
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/// <param name="obj">对象</param>
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/// <returns>时间</returns>
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public static DateTime? ToDateTime(this object obj)
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{
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if (obj != null && DateTime.TryParse(obj.ToString(), out var date) && date != DateTime.MinValue && date != DateTimeOffset.MinValue)
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{
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return date;
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}
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return null;
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}
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/// <summary>
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/// 转时间
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/// </summary>
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/// <param name="dic">字典</param>
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/// <param name="key">键</param>
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/// <returns>值</returns>
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public static DateTime? ToDateTime<TKey, TValue>(this IDictionary<TKey, TValue> dic, TKey key)
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{
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if (dic != null && dic.ContainsKey(key) && dic[key] != null && DateTime.TryParse(dic[key]?.ToString(), out var date) && date != DateTime.MinValue) return date;
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return null;
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}
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/// <summary>
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/// 时间转时间戳
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/// </summary>
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/// <param name="time">时间</param>
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/// <param name="milliseconds">true毫秒级 false秒级</param>
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/// <returns>时间戳</returns>
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public static long ToTimeStamp(this DateTime time, bool milliseconds = true)
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{
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var timespan = time.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0);
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return milliseconds ? (long)timespan.TotalMilliseconds : timespan.Seconds;
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}
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/// <summary>
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/// 时间戳转时间
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/// </summary>
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/// <param name="timestamp">时间戳</param>
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/// <param name="milliseconds">true毫秒级 false秒级</param>
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/// <returns>时间</returns>
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public static DateTime ToDateTimeByMilliseconds(this long timestamp, bool milliseconds = true)
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{
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var time = new DateTime(1970, 1, 1, 0, 0, 0);
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time = milliseconds ? time.AddMilliseconds(timestamp) : time.AddSeconds(timestamp);
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return time.ToLocalTime();
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}
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/// <summary>
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/// 截取日期
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/// </summary>
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/// <param name="date">时间</param>
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/// <returns>日期</returns>
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public static DateTime? GetYYYYMMDD(this DateTime? date)
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{
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return date.HasValue ? date.Value.GetYYYYMMDD() : null;
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}
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/// <summary>
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/// 截取日期
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/// </summary>
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/// <param name="date">时间</param>
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/// <returns>日期</returns>
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public static DateTime GetYYYYMMDD(this DateTime date)
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{
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return new DateTime(date.Year, date.Month, date.Day);
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}
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/// <summary>
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/// 获取时间范围选择器
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/// </summary>
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/// <param name="str"></param>
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/// <param name="range"></param>
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/// <returns></returns>
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public static bool TryToDateTimeRange(this string str, out DateTimeRange range)
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{
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range = new DateTimeRange();
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if (str.IsNotNull())
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{
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if (str.Contains(","))
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{
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var times = str.Split(',');
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if (times.Length == 2
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&& DateTime.TryParse(times[0], out var start) && start != DateTime.MinValue
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&& DateTime.TryParse(times[1], out var end) && end != DateTime.MinValue
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&& end >= start)
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{
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range.Start = start;
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range.End = end;
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}
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}
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else if (str.StartsWith("Relative"))
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{
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var splits = str.Split("_");
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if (splits.Length == 4
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&& int.TryParse(splits[2], out var quantity))
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{
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var type = splits[1];
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var unit = splits[3];
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if ((type == "Before" || type == "Current" || type == "After")
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&& (unit == "Day" || unit == "Week" || unit == "Month"))
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{
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var now = DateTime.Now;
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range.Start = new DateTime(now.Year, now.Month, now.Day);
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if (type == "Before")
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{
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quantity = 0 - quantity;
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}
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switch (unit)
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{
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case "Day":
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range.Start = range.Start.AddDays(quantity);
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range.End = new DateTime(range.Start.Year, range.Start.Month, range.Start.Day, 23, 59, 59, 999);
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break;
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case "Week":
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var week = (int)range.Start.DayOfWeek;
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range.Start = range.Start.AddDays(0 - week);
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range.Start = range.Start.AddDays(quantity * 7);
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range.End = new DateTime(range.Start.Year, range.Start.Month, range.Start.Day, 23, 59, 59, 999).AddDays(6);
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break;
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case "Month":
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range.Start = new DateTime(now.Year, now.Month, 1).AddMonths(quantity);
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range.End = new DateTime(range.Start.Year, range.Start.Month, DateTime.DaysInMonth(range.Start.Year, range.Start.Month), 23, 59, 59, 999);
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break;
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}
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}
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}
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}
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else if (DateTime.TryParse(str, out var time) && time != DateTime.MinValue)
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{
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range.Start = time;
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range.End = time;
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}
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}
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if (range.Start == DateTime.MinValue && range.End == DateTime.MinValue)
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{
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range = null;
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return false;
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}
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else if (
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range.Start.Hour == 0 && range.Start.Minute == 0 && range.Start.Second == 0
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&& range.End.Hour == 0 && range.End.Minute == 0 && range.End.Second == 0)
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{
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range.End = new DateTime(range.End.Year, range.End.Month, range.End.Day, 23, 59, 59, 999);
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}
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return true;
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}
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/// <summary>
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/// 获取今天范围
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/// </summary>
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/// <returns></returns>
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public static DateTimeRange GetTodayRange()
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{
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var now = DateTime.Now;
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var range = new DateTimeRange();
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range.Start = new DateTime(now.Year, now.Month, now.Day);
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range.End = new DateTime(now.Year, now.Month, now.Day, 23, 59, 59, 999);
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return range;
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}
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/// <summary>
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/// 格式化
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/// </summary>
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/// <param name="span"></param>
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/// <returns></returns>
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public static string Format(this TimeSpan span)
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{
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if (span.Days > 0)
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{
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return $"{span.Days}天";
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}
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else if (span.Hours > 0)
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{
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return $"{span.Hours}小时{span.Minutes}分";
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}
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else if (span.Minutes > 0)
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{
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return $"{span.Minutes}分{span.Seconds}秒";
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}
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else if (span.Seconds > 0)
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{
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return $"{span.Seconds}秒";
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}
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else if (span.Milliseconds > 0)
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{
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return $"{span.Milliseconds}毫秒";
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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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