mirror of https://github.com/Jackett/Jackett
325 lines
13 KiB
C#
325 lines
13 KiB
C#
using System;
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using System.Globalization;
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using System.Linq;
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using System.Text.RegularExpressions;
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using Jackett.Common.Extensions;
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namespace Jackett.Common.Utils
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{
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/// <summary>
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/// All functions MUST return local time (local time zone)
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/// </summary>
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public static class DateTimeUtil
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{
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public const string Rfc1123ZPattern = "ddd, dd MMM yyyy HH':'mm':'ss z";
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private static readonly Regex _TimeAgoRegexp = new Regex(@"(?i)\bago", RegexOptions.Compiled);
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private static readonly Regex _TodayRegexp = new Regex(@"(?i)\btoday(?:[\s,]+(?:at){0,1}\s*|[\s,]*|$)", RegexOptions.Compiled);
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private static readonly Regex _TomorrowRegexp = new Regex(@"(?i)\btomorrow(?:[\s,]+(?:at){0,1}\s*|[\s,]*|$)", RegexOptions.Compiled);
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private static readonly Regex _YesterdayRegexp = new Regex(@"(?i)\byesterday(?:[\s,]+(?:at){0,1}\s*|[\s,]*|$)", RegexOptions.Compiled);
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private static readonly Regex _DaysOfWeekRegexp = new Regex(@"(?i)\b(monday|tuesday|wednesday|thursday|friday|saturday|sunday)\s+at\s+", RegexOptions.Compiled);
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private static readonly Regex _MissingYearRegexp = new Regex(@"^(\d{1,2}-\d{1,2})(\s|$)", RegexOptions.Compiled);
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private static readonly Regex _MissingYearRegexp2 = new Regex(@"^(\d{1,2}\s+\w{3})\s+(\d{1,2}\:\d{1,2}.*)$", RegexOptions.Compiled); // 1 Jan 10:30
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public static DateTime UnixTimestampToDateTime(long unixTime)
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{
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var dt = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
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dt = dt.AddSeconds(unixTime).ToLocalTime();
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return dt;
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}
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public static DateTime UnixTimestampToDateTime(double unixTime)
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{
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var unixStart = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
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var unixTimeStampInTicks = (long)(unixTime * TimeSpan.TicksPerSecond);
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return new DateTime(unixStart.Ticks + unixTimeStampInTicks).ToLocalTime();
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}
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public static double DateTimeToUnixTimestamp(DateTime dt)
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{
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var date = dt.ToUniversalTime();
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var ticks = date.Ticks - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).Ticks;
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var ts = ticks / TimeSpan.TicksPerSecond;
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return ts;
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}
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// ex: "2 hours 1 day"
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public static DateTime FromTimeAgo(string str, DateTime? relativeFrom = null)
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{
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str = str.ToLowerInvariant();
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var now = relativeFrom ?? DateTime.Now;
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if (str.Contains("now"))
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return DateTime.SpecifyKind(now, DateTimeKind.Local);
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str = str.Replace(",", "");
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str = str.Replace("ago", "");
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str = str.Replace("and", "");
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var timeAgo = TimeSpan.Zero;
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var timeAgoRegex = new Regex(@"\s*?([\d\.]+)\s*?([^\d\s\.]+)\s*?");
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var timeAgoMatches = timeAgoRegex.Match(str);
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while (timeAgoMatches.Success)
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{
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var val = ParseUtil.CoerceFloat(timeAgoMatches.Groups[1].Value);
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var unit = timeAgoMatches.Groups[2].Value;
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timeAgoMatches = timeAgoMatches.NextMatch();
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if (unit.Contains("sec") || unit == "s")
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timeAgo += TimeSpan.FromSeconds(val);
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else if (unit.Contains("min") || unit == "m")
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timeAgo += TimeSpan.FromMinutes(val);
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else if (unit.Contains("hour") || unit.Contains("hr") || unit == "h")
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timeAgo += TimeSpan.FromHours(val);
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else if (unit.Contains("day") || unit == "d")
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timeAgo += TimeSpan.FromDays(val);
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else if (unit.Contains("week") || unit.Contains("wk") || unit == "w")
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timeAgo += TimeSpan.FromDays(val * 7);
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else if (unit.Contains("month") || unit == "mo")
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timeAgo += TimeSpan.FromDays(val * 30);
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else if (unit.Contains("year") || unit == "y")
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timeAgo += TimeSpan.FromDays(val * 365);
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else
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throw new Exception("TimeAgo parsing failed, unknown unit: " + unit);
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}
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return DateTime.SpecifyKind(now - timeAgo, DateTimeKind.Local);
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}
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// Uses the DateTimeRoutines library to parse the date
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// http://www.codeproject.com/Articles/33298/C-Date-Time-Parser
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public static DateTime FromFuzzyTime(string str, string format = null)
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{
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var dtFormat = format == "UK" ?
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DateTimeRoutines.DateTimeRoutines.DateTimeFormat.UkDate :
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DateTimeRoutines.DateTimeRoutines.DateTimeFormat.UsaDate;
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if (DateTimeRoutines.DateTimeRoutines.TryParseDateOrTime(
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str, dtFormat, out DateTimeRoutines.DateTimeRoutines.ParsedDateTime dt))
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return dt.DateTime;
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throw new Exception("FromFuzzyTime parsing failed");
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}
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private static DateTime FromFuzzyPastTime(string str, string format, DateTime now)
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{
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var result = FromFuzzyTime(str, format);
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if (result > now)
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result = result.AddYears(-1);
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return result;
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}
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public static DateTime FromUnknown(string str, string format = null, DateTime? relativeFrom = null)
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{
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try
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{
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str = ParseUtil.NormalizeSpace(str);
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if (DateTime.TryParseExact(str, Rfc1123ZPattern, CultureInfo.InvariantCulture, DateTimeStyles.None, out var parsedDate))
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return parsedDate;
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var now = relativeFrom ?? DateTime.Now;
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// try parsing the str as an unix timestamp
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if (str.IsAllDigits() && long.TryParse(str, out var unixTimeStamp))
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return UnixTimestampToDateTime(unixTimeStamp);
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if (str.ToLower().Contains("now"))
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return now;
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// ... ago
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var match = _TimeAgoRegexp.Match(str);
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if (match.Success)
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{
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var timeAgo = str;
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return FromTimeAgo(timeAgo);
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}
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// Today ...
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match = _TodayRegexp.Match(str);
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if (match.Success)
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{
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var time = str.Replace(match.Groups[0].Value, "");
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var dt = DateTime.SpecifyKind(now.Date, DateTimeKind.Unspecified);
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dt += ParseTimeSpan(time);
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return dt;
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}
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// Yesterday ...
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match = _YesterdayRegexp.Match(str);
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if (match.Success)
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{
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var time = str.Replace(match.Groups[0].Value, "");
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var dt = DateTime.SpecifyKind(now.Date, DateTimeKind.Unspecified);
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dt += ParseTimeSpan(time);
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dt -= TimeSpan.FromDays(1);
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return dt;
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}
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// Tomorrow ...
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match = _TomorrowRegexp.Match(str);
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if (match.Success)
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{
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var time = str.Replace(match.Groups[0].Value, "");
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var dt = DateTime.SpecifyKind(now.Date, DateTimeKind.Unspecified);
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dt += ParseTimeSpan(time);
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dt += TimeSpan.FromDays(1);
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return dt;
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}
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// [day of the week] at ... (eg: Saturday at 14:22)
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match = _DaysOfWeekRegexp.Match(str);
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if (match.Success)
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{
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var time = str.Replace(match.Groups[0].Value, "");
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var dt = DateTime.SpecifyKind(now.Date, DateTimeKind.Unspecified);
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dt += ParseTimeSpan(time);
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DayOfWeek dow;
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var groupMatchLower = match.Groups[1].Value.ToLower();
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if (groupMatchLower.StartsWith("monday"))
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dow = DayOfWeek.Monday;
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else if (groupMatchLower.StartsWith("tuesday"))
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dow = DayOfWeek.Tuesday;
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else if (groupMatchLower.StartsWith("wednesday"))
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dow = DayOfWeek.Wednesday;
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else if (groupMatchLower.StartsWith("thursday"))
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dow = DayOfWeek.Thursday;
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else if (groupMatchLower.StartsWith("friday"))
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dow = DayOfWeek.Friday;
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else if (groupMatchLower.StartsWith("saturday"))
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dow = DayOfWeek.Saturday;
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else
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dow = DayOfWeek.Sunday;
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while (dt.DayOfWeek != dow)
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dt = dt.AddDays(-1);
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return dt;
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}
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// add missing year
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match = _MissingYearRegexp.Match(str);
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if (match.Success)
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{
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var date = match.Groups[1].Value;
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var newDate = now.Year + "-" + date;
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str = str.Replace(date, newDate);
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return FromFuzzyPastTime(str, format, now);
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}
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// add missing year 2
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match = _MissingYearRegexp2.Match(str);
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if (match.Success)
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{
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var date = match.Groups[1].Value;
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var time = match.Groups[2].Value;
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str = date + " " + now.Year + " " + time;
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return FromFuzzyPastTime(str, format, now);
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}
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return FromFuzzyTime(str, format);
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}
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catch (Exception ex)
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{
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throw new Exception($"DateTime parsing failed for \"{str}\": {ex}");
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}
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}
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// converts a date/time string to a DateTime object using a GoLang layout
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public static DateTime ParseDateTimeGoLang(string date, string layout, DateTime? relativeFrom = null)
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{
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var now = relativeFrom ?? DateTime.Now;
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date = ParseUtil.NormalizeSpace(date);
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var commonStandardFormats = new[] { "y", "h", "d" };
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if (commonStandardFormats.Any(layout.ContainsIgnoreCase) && DateTime.TryParseExact(date, layout, CultureInfo.InvariantCulture, DateTimeStyles.None, out var parsedDate))
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return parsedDate;
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var format = layout
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// year
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.Replace("2006", "yyyy")
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.Replace("06", "yy")
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// month
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.Replace("January", "MMMM")
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.Replace("Jan", "MMM")
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.Replace("01", "MM")
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// day
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.Replace("Monday", "dddd")
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.Replace("Mon", "ddd")
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.Replace("02", "dd")
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//pattern = pattern.Replace("_2", "") // space padding not supported nativly by C#?
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.Replace("2", "d")
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// hours/minutes/seconds
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.Replace("05", "ss")
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.Replace("15", "HH")
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.Replace("03", "hh")
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.Replace("3", "h")
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.Replace("04", "mm")
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.Replace("4", "m")
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.Replace("5", "s")
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// month again
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.Replace("1", "M")
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// fractional seconds
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.Replace(".0000", "ffff")
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.Replace(".000", "fff")
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.Replace(".00", "ff")
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.Replace(".0", "f")
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.Replace(".9999", "FFFF")
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.Replace(".999", "FFF")
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.Replace(".99", "FF")
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.Replace(".9", "F")
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// AM/PM
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.Replace("PM", "tt")
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.Replace("pm", "tt") // not sure if this works
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// timezones
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// these might need further tuning
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//pattern = pattern.Replace("MST", "")
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//pattern = pattern.Replace("Z07:00:00", "")
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.Replace("Z07:00", "'Z'zzz")
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.Replace("Z07", "'Z'zz")
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//pattern = pattern.Replace("Z070000", "")
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//pattern = pattern.Replace("Z0700", "")
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.Replace("Z07:00", "'Z'zzz")
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.Replace("Z07", "'Z'zz")
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//pattern = pattern.Replace("-07:00:00", "")
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.Replace("-07:00", "zzz")
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//pattern = pattern.Replace("-0700", "zz")
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.Replace("-07", "zz");
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try
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{
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var dateTime = DateTime.ParseExact(date, format, CultureInfo.InvariantCulture);
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if (!format.Contains("yy") && dateTime > now)
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dateTime = dateTime.AddYears(-1);
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return dateTime;
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}
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catch (FormatException ex)
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{
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throw new FormatException($"Error while parsing DateTime \"{date}\", using layout \"{layout}\" ({format}): {ex.Message}", ex);
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}
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}
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private static TimeSpan ParseTimeSpan(string time) =>
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string.IsNullOrWhiteSpace(time)
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? TimeSpan.Zero
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: DateTime.Parse(time).TimeOfDay;
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}
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}
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