mirror of https://github.com/Jackett/Jackett
607 lines
27 KiB
C#
607 lines
27 KiB
C#
//********************************************************************************************
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//Author: Sergey Stoyan, CliverSoft.com
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// http://cliversoft.com
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// stoyan@cliversoft.com
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// sergey.stoyan@gmail.com
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// 27 February 2007
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//********************************************************************************************
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Text.RegularExpressions;
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// ReSharper disable NotAccessedField.Global
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// ReSharper disable MemberCanBePrivate.Global
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// ReSharper disable UnusedMember.Global
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namespace DateTimeRoutines
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{
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/// <summary>
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/// Miscellaneous and parsing methods for DateTime
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/// </summary>
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[ExcludeFromCodeCoverage] // this library is not changed by Jackett team
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public static class DateTimeRoutines
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{
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#region miscellaneous methods
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/// <summary>
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/// Amount of seconds elapsed between 1970-01-01 00:00:00 and the date-time.
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/// </summary>
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/// <param name="dateTime">date-time</param>
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/// <returns>seconds</returns>
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public static uint GetSecondsSinceUnixEpoch(this DateTime dateTime)
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{
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var t = dateTime - new DateTime(1970, 1, 1);
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var ss = (int)t.TotalSeconds;
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if (ss < 0)
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return 0;
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return (uint)ss;
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}
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#endregion
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#region parsing definitions
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/// <summary>
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/// Defines a substring where date-time was found and result of conversion
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/// </summary>
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public class ParsedDateTime
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{
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/// <summary>
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/// Index of first char of a date substring found in the string
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/// </summary>
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public readonly int IndexOfDate;
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/// <summary>
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/// Length a date substring found in the string
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/// </summary>
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public readonly int LengthOfDate;
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/// <summary>
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/// Index of first char of a time substring found in the string
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/// </summary>
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public readonly int IndexOfTime;
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/// <summary>
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/// Length of a time substring found in the string
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/// </summary>
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public readonly int LengthOfTime;
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/// <summary>
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/// DateTime found in the string
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/// </summary>
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public readonly DateTime DateTime;
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/// <summary>
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/// True if a date was found within the string
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/// </summary>
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public readonly bool IsDateFound;
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/// <summary>
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/// True if a time was found within the string
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/// </summary>
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public readonly bool IsTimeFound;
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/// <summary>
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/// UTC offset if it was found within the string
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/// </summary>
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public readonly TimeSpan UtcOffset;
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/// <summary>
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/// True if UTC offset was found in the string
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/// </summary>
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public readonly bool IsUtcOffsetFound;
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/// <summary>
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/// Utc gotten from DateTime if IsUtcOffsetFound is True
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/// </summary>
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public DateTime UtcDateTime;
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internal ParsedDateTime(int indexOfDate, int lengthOfDate, int indexOfTime, int lengthOfTime, DateTime dateTime)
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{
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IndexOfDate = indexOfDate;
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LengthOfDate = lengthOfDate;
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IndexOfTime = indexOfTime;
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LengthOfTime = lengthOfTime;
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DateTime = dateTime;
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IsDateFound = indexOfDate > -1;
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IsTimeFound = indexOfTime > -1;
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UtcOffset = new TimeSpan(25, 0, 0);
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IsUtcOffsetFound = false;
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UtcDateTime = new DateTime(1, 1, 1);
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}
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internal ParsedDateTime(int indexOfDate, int lengthOfDate, int indexOfTime, int lengthOfTime, DateTime dateTime, TimeSpan utcOffset)
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{
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IndexOfDate = indexOfDate;
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LengthOfDate = lengthOfDate;
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IndexOfTime = indexOfTime;
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LengthOfTime = lengthOfTime;
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DateTime = dateTime;
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IsDateFound = indexOfDate > -1;
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IsTimeFound = indexOfTime > -1;
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UtcOffset = utcOffset;
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IsUtcOffsetFound = Math.Abs(utcOffset.TotalHours) < 12;
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if (!IsUtcOffsetFound)
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UtcDateTime = new DateTime(1, 1, 1);
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else
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{
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if (indexOfDate < 0)//to avoid negative date exception when date is undefined
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{
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var ts = dateTime.TimeOfDay + utcOffset;
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if (ts < new TimeSpan(0))
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UtcDateTime = new DateTime(1, 1, 2) + ts;
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else
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UtcDateTime = new DateTime(1, 1, 1) + ts;
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}
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else
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UtcDateTime = dateTime + utcOffset;
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}
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}
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}
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/// <summary>
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/// Date that is accepted in the following cases:
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/// - no date was parsed by TryParseDateOrTime();
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/// - no year was found by TryParseDate();
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/// It is ignored if DefaultDateIsNow = true was set after DefaultDate
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/// </summary>
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public static DateTime DefaultDate
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{
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set
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{
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_DefaultDate = value;
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DefaultDateIsNow = false;
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}
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get => DefaultDateIsNow ? DateTime.Now : _DefaultDate;
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}
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private static DateTime _DefaultDate = DateTime.Now;
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/// <summary>
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/// If true then DefaultDate property is ignored and DefaultDate is always DateTime.Now
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/// </summary>
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public static bool DefaultDateIsNow = true;
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/// <summary>
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/// Defines default date-time format.
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/// </summary>
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[Flags]
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public enum DateTimeFormat
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{
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/// <summary>
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/// month number goes before day number
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/// </summary>
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UsaDate,
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/// <summary>
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/// day number goes before month number
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/// </summary>
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UkDate,
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///// <summary>
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///// time is specifed through AM or PM
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///// </summary>
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//USA_TIME,
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}
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#endregion
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#region parsing derived methods for DateTime output
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/// <summary>
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/// Tries to find date and time within the passed string and return it as DateTime structure.
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/// </summary>
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/// <param name="str">string that contains date and/or time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="dateTime">parsed date-time output</param>
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/// <returns>true if both date and time were found, else false</returns>
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public static bool TryParseDateTime(this string str, DateTimeFormat defaultFormat, out DateTime dateTime)
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{
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if (!TryParseDateTime(str, defaultFormat, out ParsedDateTime parsedDateTime))
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{
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dateTime = new DateTime(1, 1, 1);
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return false;
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}
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dateTime = parsedDateTime.DateTime;
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return true;
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}
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/// <summary>
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/// Tries to find date and/or time within the passed string and return it as DateTime structure.
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/// If only date was found, time in the returned DateTime is always 0:0:0.
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/// If only time was found, date in the returned DateTime is DefaultDate.
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/// </summary>
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/// <param name="str">string that contains date and(or) time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="dateTime">parsed date-time output</param>
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/// <returns>true if date and/or time was found, else false</returns>
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public static bool TryParseDateOrTime(this string str, DateTimeFormat defaultFormat, out DateTime dateTime)
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{
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if (!TryParseDateOrTime(str, defaultFormat, out ParsedDateTime parsedDateTime))
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{
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dateTime = new DateTime(1, 1, 1);
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return false;
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}
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dateTime = parsedDateTime.DateTime;
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return true;
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}
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/// <summary>
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/// Tries to find time within the passed string and return it as DateTime structure.
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/// It recognizes only time while ignoring date, so date in the returned DateTime is always 1/1/1.
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/// </summary>
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/// <param name="str">string that contains time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="time">parsed time output</param>
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/// <returns>true if time was found, else false</returns>
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public static bool TryParseTime(this string str, DateTimeFormat defaultFormat, out DateTime time)
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{
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if (!TryParseTime(str, defaultFormat, out var parsedTime, null))
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{
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time = new DateTime(1, 1, 1);
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return false;
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}
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time = parsedTime.DateTime;
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return true;
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}
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/// <summary>
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/// Tries to find date within the passed string and return it as DateTime structure.
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/// It recognizes only date while ignoring time, so time in the returned DateTime is always 0:0:0.
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/// If year of the date was not found then it accepts the current year.
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/// </summary>
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/// <param name="str">string that contains date</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="date">parsed date output</param>
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/// <returns>true if date was found, else false</returns>
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public static bool TryParseDate(this string str, DateTimeFormat defaultFormat, out DateTime date)
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{
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if (!TryParseDate(str, defaultFormat, out ParsedDateTime parsedDate))
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{
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date = new DateTime(1, 1, 1);
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return false;
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}
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date = parsedDate.DateTime;
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return true;
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}
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#endregion
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#region parsing derived methods for ParsedDateTime output
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/// <summary>
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/// Tries to find date and time within the passed string and return it as ParsedDateTime object.
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/// </summary>
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/// <param name="str">string that contains date-time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="parsedDateTime">parsed date-time output</param>
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/// <returns>true if both date and time were found, else false</returns>
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public static bool TryParseDateTime(this string str, DateTimeFormat defaultFormat, out ParsedDateTime parsedDateTime)
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{
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if (TryParseDateOrTime(str, defaultFormat, out parsedDateTime)
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&& parsedDateTime.IsDateFound
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&& parsedDateTime.IsTimeFound
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)
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return true;
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parsedDateTime = null;
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return false;
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}
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/// <summary>
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/// Tries to find time within the passed string and return it as ParsedDateTime object.
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/// It recognizes only time while ignoring date, so date in the returned ParsedDateTime is always 1/1/1
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/// </summary>
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/// <param name="str">string that contains date-time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="parsedTime">parsed date-time output</param>
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/// <returns>true if time was found, else false</returns>
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public static bool TryParseTime(this string str, DateTimeFormat defaultFormat, out ParsedDateTime parsedTime)
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=> TryParseTime(str, defaultFormat, out parsedTime, null);
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/// <summary>
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/// Tries to find date and/or time within the passed string and return it as ParsedDateTime object.
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/// If only date was found, time in the returned ParsedDateTime is always 0:0:0.
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/// If only time was found, date in the returned ParsedDateTime is DefaultDate.
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/// </summary>
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/// <param name="str">string that contains date-time</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="parsedDateTime">parsed date-time output</param>
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/// <returns>true if date or time was found, else false</returns>
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public static bool TryParseDateOrTime(this string str, DateTimeFormat defaultFormat, out ParsedDateTime parsedDateTime)
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{
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parsedDateTime = null;
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ParsedDateTime parsedTime;
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if (!TryParseDate(str, defaultFormat, out
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ParsedDateTime parsedDate))
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{
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if (!TryParseTime(str, defaultFormat, out parsedTime, null))
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return false;
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var dateTime = new DateTime(DefaultDate.Year, DefaultDate.Month, DefaultDate.Day, parsedTime.DateTime.Hour, parsedTime.DateTime.Minute, parsedTime.DateTime.Second);
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parsedDateTime = new ParsedDateTime(-1, -1, parsedTime.IndexOfTime, parsedTime.LengthOfTime, dateTime, parsedTime.UtcOffset);
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}
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else
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{
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if (!TryParseTime(str, defaultFormat, out parsedTime, parsedDate))
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{
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var dateTime = new DateTime(parsedDate.DateTime.Year, parsedDate.DateTime.Month, parsedDate.DateTime.Day, 0, 0, 0);
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parsedDateTime = new ParsedDateTime(parsedDate.IndexOfDate, parsedDate.LengthOfDate, -1, -1, dateTime);
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}
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else
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{
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var dateTime = new DateTime(parsedDate.DateTime.Year, parsedDate.DateTime.Month, parsedDate.DateTime.Day, parsedTime.DateTime.Hour, parsedTime.DateTime.Minute, parsedTime.DateTime.Second);
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parsedDateTime = new ParsedDateTime(parsedDate.IndexOfDate, parsedDate.LengthOfDate, parsedTime.IndexOfTime, parsedTime.LengthOfTime, dateTime, parsedTime.UtcOffset);
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}
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}
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return true;
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}
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#endregion
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#region parsing base methods
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/// <summary>
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/// Tries to find time within the passed string (relatively to the passed parsed_date if any) and return it as ParsedDateTime object.
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/// It recognizes only time while ignoring date, so date in the returned ParsedDateTime is always 1/1/1
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/// </summary>
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/// <param name="str">string that contains date</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="parsedTime">parsed date-time output</param>
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/// <param name="parsedDate">ParsedDateTime object if the date was found within this string, else NULL</param>
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/// <returns>true if time was found, else false</returns>
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public static bool TryParseTime(this string str, DateTimeFormat defaultFormat, out ParsedDateTime parsedTime, ParsedDateTime parsedDate)
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{
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parsedTime = null;
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var timeZoneR = defaultFormat == DateTimeFormat.UsaDate ?
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@"(?:\s*(?'time_zone'UTC|GMT|CST|EST))?" : @"(?:\s*(?'time_zone'UTC|GMT))?";
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Match m;
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if (parsedDate != null && parsedDate.IndexOfDate > -1)
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{//look around the found date
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//look for <date> hh:mm:ss <UTC offset>
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m = Regex.Match(str.Substring(parsedDate.IndexOfDate + parsedDate.LengthOfDate), @"(?<=^\s*,?\s+|^\s*at\s*|^\s*[T\-]\s*)(?'hour'\d{2})\s*:\s*(?'minute'\d{2})\s*:\s*(?'second'\d{2})\s+(?'offset_sign'[\+\-])(?'offset_hh'\d{2}):?(?'offset_mm'\d{2})(?=$|[^\d\w])", RegexOptions.Compiled);
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if (!m.Success)
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//look for <date> [h]h:mm[:ss] [PM/AM] [UTC/GMT]
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m = Regex.Match(str.Substring(parsedDate.IndexOfDate + parsedDate.LengthOfDate), @"(?<=^\s*,?\s+|^\s*at\s*|^\s*[T\-]\s*)(?'hour'\d{1,2})\s*:\s*(?'minute'\d{2})\s*(?::\s*(?'second'\d{2}))?(?:\s*(?'ampm'AM|am|PM|pm))?" + timeZoneR + @"(?=$|[^\d\w])", RegexOptions.Compiled);
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if (!m.Success)
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//look for [h]h:mm:ss [PM/AM] [UTC/GMT] <date>
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m = Regex.Match(str.Substring(0, parsedDate.IndexOfDate), @"(?<=^|[^\d])(?'hour'\d{1,2})\s*:\s*(?'minute'\d{2})\s*(?::\s*(?'second'\d{2}))?(?:\s*(?'ampm'AM|am|PM|pm))?" + timeZoneR + @"(?=$|[\s,]+)", RegexOptions.Compiled);
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if (!m.Success)
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//look for [h]h:mm:ss [PM/AM] [UTC/GMT] within <date>
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m = Regex.Match(str.Substring(parsedDate.IndexOfDate, parsedDate.LengthOfDate), @"(?<=^|[^\d])(?'hour'\d{1,2})\s*:\s*(?'minute'\d{2})\s*(?::\s*(?'second'\d{2}))?(?:\s*(?'ampm'AM|am|PM|pm))?" + timeZoneR + @"(?=$|[\s,]+)", RegexOptions.Compiled);
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}
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else//look anywhere within string
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{
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//look for hh:mm:ss <UTC offset>
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m = Regex.Match(str, @"(?<=^|\s+|\s*T\s*)(?'hour'\d{2})\s*:\s*(?'minute'\d{2})\s*:\s*(?'second'\d{2})\s+(?'offset_sign'[\+\-])(?'offset_hh'\d{2}):?(?'offset_mm'\d{2})?(?=$|[^\d\w])", RegexOptions.Compiled);
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if (!m.Success)
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//look for [h]h:mm[:ss] [PM/AM] [UTC/GMT]
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m = Regex.Match(str, @"(?<=^|\s+|\s*T\s*)(?'hour'\d{1,2})\s*:\s*(?'minute'\d{2})\s*(?::\s*(?'second'\d{2}))?(?:\s*(?'ampm'AM|am|PM|pm))?" + timeZoneR + @"(?=$|[^\d\w])", RegexOptions.Compiled);
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}
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if (!m.Success)
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return false;
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//try
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//{
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var hour = int.Parse(m.Groups["hour"].Value);
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if (hour < 0 || hour > 23)
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return false;
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var minute = int.Parse(m.Groups["minute"].Value);
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if (minute < 0 || minute > 59)
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return false;
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var second = 0;
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if (!string.IsNullOrEmpty(m.Groups["second"].Value))
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{
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second = int.Parse(m.Groups["second"].Value);
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if (second < 0 || second > 59)
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return false;
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}
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if ("PM".Equals(m.Groups["ampm"].Value, StringComparison.OrdinalIgnoreCase) && hour < 12)
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hour += 12;
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else if ("AM".Equals(m.Groups["ampm"].Value, StringComparison.OrdinalIgnoreCase) && hour == 12)
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hour -= 12;
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var dateTime = new DateTime(1, 1, 1, hour, minute, second);
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if (m.Groups["offset_hh"].Success)
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{
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var offsetHh = int.Parse(m.Groups["offset_hh"].Value);
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var offsetMm = 0;
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if (m.Groups["offset_mm"].Success)
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offsetMm = int.Parse(m.Groups["offset_mm"].Value);
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var utcOffset = new TimeSpan(offsetHh, offsetMm, 0);
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if (m.Groups["offset_sign"].Value == "-")
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utcOffset = -utcOffset;
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parsedTime = new ParsedDateTime(-1, -1, m.Index, m.Length, dateTime, utcOffset);
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return true;
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}
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if (m.Groups["time_zone"].Success)
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{
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TimeSpan utcOffset;
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switch (m.Groups["time_zone"].Value)
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{
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case "UTC":
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case "GMT":
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utcOffset = new TimeSpan(0, 0, 0);
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break;
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case "CST":
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utcOffset = new TimeSpan(-6, 0, 0);
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break;
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case "EST":
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utcOffset = new TimeSpan(-5, 0, 0);
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break;
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default:
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throw new Exception("Time zone: " + m.Groups["time_zone"].Value + " is not defined.");
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}
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parsedTime = new ParsedDateTime(-1, -1, m.Index, m.Length, dateTime, utcOffset);
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return true;
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}
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parsedTime = new ParsedDateTime(-1, -1, m.Index, m.Length, dateTime);
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//}
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//catch(Exception e)
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//{
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// return false;
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//}
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return true;
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}
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/// <summary>
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/// Tries to find date within the passed string and return it as ParsedDateTime object.
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/// It recognizes only date while ignoring time, so time in the returned ParsedDateTime is always 0:0:0.
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/// If year of the date was not found then it accepts the current year.
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/// </summary>
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/// <param name="str">string that contains date</param>
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/// <param name="defaultFormat">format to be used preferably in ambivalent instances</param>
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/// <param name="parsedDate">parsed date output</param>
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/// <returns>true if date was found, else false</returns>
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public static bool TryParseDate(this string str, DateTimeFormat defaultFormat, out ParsedDateTime parsedDate)
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{
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parsedDate = null;
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if (string.IsNullOrEmpty(str))
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return false;
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//look for dd/mm/yy
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var m = Regex.Match(str, @"(?<=^|[^\d])(?'day'\d{1,2})\s*(?'separator'[\\/\.])+\s*(?'month'\d{1,2})\s*\'separator'+\s*(?'year'\d{2}|\d{4})(?=$|[^\d])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (m.Success)
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{
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DateTime date;
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if ((defaultFormat ^ DateTimeFormat.UsaDate) == DateTimeFormat.UsaDate)
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{
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if (!ConvertToDate(int.Parse(m.Groups["year"].Value), int.Parse(m.Groups["day"].Value), int.Parse(m.Groups["month"].Value), out date))
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return false;
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}
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else
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{
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if (!ConvertToDate(int.Parse(m.Groups["year"].Value), int.Parse(m.Groups["month"].Value), int.Parse(m.Groups["day"].Value), out date))
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return false;
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}
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parsedDate = new ParsedDateTime(m.Index, m.Length, -1, -1, date);
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return true;
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}
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//look for [yy]yy-mm-dd
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m = Regex.Match(str, @"(?<=^|[^\d])(?'year'\d{2}|\d{4})\s*(?'separator'[\-])\s*(?'month'\d{1,2})\s*\'separator'+\s*(?'day'\d{1,2})(?=$|[^\d])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (m.Success)
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{
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if (!ConvertToDate(int.Parse(m.Groups["year"].Value), int.Parse(m.Groups["month"].Value), int.Parse(m.Groups["day"].Value), out var date))
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return false;
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parsedDate = new ParsedDateTime(m.Index, m.Length, -1, -1, date);
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return true;
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}
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//look for month dd yyyy
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m = Regex.Match(str, @"(?:^|[^\d\w])(?'month'Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[uarychilestmbro]*\s+(?'day'\d{1,2})(?:-?st|-?th|-?rd|-?nd)?\s*,?\s*(?'year'\d{4})(?=$|[^\d\w])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (!m.Success)
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//look for dd month [yy]yy
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m = Regex.Match(str, @"(?:^|[^\d\w:])(?'day'\d{1,2})(?:-?st\s+|-?th\s+|-?rd\s+|-?nd\s+|-|\s+)(?'month'Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[uarychilestmbro]*(?:\s*,?\s*|-)'?(?'year'\d{2}|\d{4})(?=$|[^\d\w])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (!m.Success)
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//look for yyyy month dd
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m = Regex.Match(str, @"(?:^|[^\d\w])(?'year'\d{4})\s+(?'month'Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[uarychilestmbro]*\s+(?'day'\d{1,2})(?:-?st|-?th|-?rd|-?nd)?(?=$|[^\d\w])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (!m.Success)
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//look for month dd hh:mm:ss MDT|UTC yyyy
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m = Regex.Match(str, @"(?:^|[^\d\w])(?'month'Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[uarychilestmbro]*\s+(?'day'\d{1,2})\s+\d{2}\:\d{2}\:\d{2}\s+(?:MDT|UTC)\s+(?'year'\d{4})(?=$|[^\d\w])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (!m.Success)
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//look for month dd [yyyy]
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m = Regex.Match(str, @"(?:^|[^\d\w])(?'month'Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[uarychilestmbro]*\s+(?'day'\d{1,2})(?:-?st|-?th|-?rd|-?nd)?(?:\s*,?\s*(?'year'\d{4}))?(?=$|[^\d\w])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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if (m.Success)
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{
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var month = -1;
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var indexOfDate = m.Index;
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var lengthOfDate = m.Length;
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switch (m.Groups["month"].Value)
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{
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case "Jan":
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case "JAN":
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month = 1;
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break;
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case "Feb":
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case "FEB":
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month = 2;
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break;
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case "Mar":
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case "MAR":
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month = 3;
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break;
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case "Apr":
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case "APR":
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month = 4;
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break;
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case "May":
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case "MAY":
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month = 5;
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break;
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case "Jun":
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case "JUN":
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month = 6;
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break;
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case "Jul":
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month = 7;
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break;
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case "Aug":
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case "AUG":
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month = 8;
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break;
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case "Sep":
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case "SEP":
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month = 9;
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break;
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case "Oct":
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case "OCT":
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month = 10;
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break;
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case "Nov":
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case "NOV":
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month = 11;
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break;
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case "Dec":
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case "DEC":
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month = 12;
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break;
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}
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var year = !string.IsNullOrEmpty(m.Groups["year"].Value) ?
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int.Parse(m.Groups["year"].Value) : DefaultDate.Year;
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if (!ConvertToDate(year, month, int.Parse(m.Groups["day"].Value), out var date))
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return false;
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parsedDate = new ParsedDateTime(indexOfDate, lengthOfDate, -1, -1, date);
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return true;
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}
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return false;
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}
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private static bool ConvertToDate(int year, int month, int day, out DateTime date)
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{
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if (year >= 100)
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{
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if (year < 1000)
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{
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date = new DateTime(1, 1, 1);
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return false;
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}
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}
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else
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if (year > 30)
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year += 1900;
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else
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year += 2000;
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try
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{
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date = new DateTime(year, month, day);
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}
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catch
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{
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date = new DateTime(1, 1, 1);
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return false;
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}
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return true;
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}
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#endregion
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}
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}
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