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//
// https://github.com/ServiceStack/ServiceStack.Text
// ServiceStack.Text: .NET C# POCO JSON, JSV and CSV Text Serializers.
//
// Authors:
// Demis Bellot (demis.bellot@gmail.com)
//
// Copyright 2012 ServiceStack Ltd.
//
// Licensed under the same terms of ServiceStack: new BSD license.
//
using System;
using ServiceStack.Text.Common;
namespace ServiceStack.Text
{
/// <summary>
/// A fast, standards-based, serialization-issue free DateTime serailizer.
/// </summary>
public static class DateTimeExtensions
{
public const long UnixEpoch = 621355968000000000L;
private static readonly DateTime UnixEpochDateTimeUtc = new DateTime(UnixEpoch, DateTimeKind.Utc);
private static readonly DateTime UnixEpochDateTimeUnspecified = new DateTime(UnixEpoch, DateTimeKind.Unspecified);
public static long ToUnixTime(this DateTime dateTime)
{
return (dateTime.ToStableUniversalTime().Ticks - UnixEpoch) / TimeSpan.TicksPerSecond;
}
public static DateTime FromUnixTime(this double unixTime)
{
return UnixEpochDateTimeUtc + TimeSpan.FromSeconds(unixTime);
}
public static long ToUnixTimeMs(this DateTime dateTime)
{
return (dateTime.ToStableUniversalTime().Ticks - UnixEpoch) / TimeSpan.TicksPerMillisecond;
}
public static long ToUnixTimeMs(this long ticks)
{
return (ticks - UnixEpoch) / TimeSpan.TicksPerMillisecond;
}
public static DateTime FromUnixTimeMs(this double msSince1970)
{
return UnixEpochDateTimeUtc + TimeSpan.FromMilliseconds(msSince1970);
}
public static DateTime FromUnixTimeMs(this long msSince1970)
{
return UnixEpochDateTimeUtc + TimeSpan.FromMilliseconds(msSince1970);
}
public static DateTime FromUnixTimeMs(this long msSince1970, TimeSpan offset)
{
return UnixEpochDateTimeUnspecified + TimeSpan.FromMilliseconds(msSince1970) + offset;
}
public static DateTime FromUnixTimeMs(this double msSince1970, TimeSpan offset)
{
return UnixEpochDateTimeUnspecified + TimeSpan.FromMilliseconds(msSince1970) + offset;
}
public static DateTime FromUnixTimeMs(string msSince1970)
{
long ms;
if (long.TryParse(msSince1970, out ms)) return ms.FromUnixTimeMs();
// Do we really need to support fractional unix time ms time strings??
return double.Parse(msSince1970).FromUnixTimeMs();
}
public static DateTime FromUnixTimeMs(string msSince1970, TimeSpan offset)
{
long ms;
if (long.TryParse(msSince1970, out ms)) return ms.FromUnixTimeMs(offset);
// Do we really need to support fractional unix time ms time strings??
return double.Parse(msSince1970).FromUnixTimeMs(offset);
}
public static DateTime RoundToMs(this DateTime dateTime)
{
return new DateTime((dateTime.Ticks / TimeSpan.TicksPerMillisecond) * TimeSpan.TicksPerMillisecond);
}
public static DateTime RoundToSecond(this DateTime dateTime)
{
return new DateTime((dateTime.Ticks / TimeSpan.TicksPerSecond) * TimeSpan.TicksPerSecond);
}
public static string ToShortestXsdDateTimeString(this DateTime dateTime)
{
return DateTimeSerializer.ToShortestXsdDateTimeString(dateTime);
}
public static DateTime FromShortestXsdDateTimeString(this string xsdDateTime)
{
return DateTimeSerializer.ParseShortestXsdDateTime(xsdDateTime);
}
public static bool IsEqualToTheSecond(this DateTime dateTime, DateTime otherDateTime)
{
return dateTime.ToStableUniversalTime().RoundToSecond().Equals(otherDateTime.ToStableUniversalTime().RoundToSecond());
}
public static string ToTimeOffsetString(this TimeSpan offset, bool includeColon = false)
{
var sign = offset < TimeSpan.Zero ? "-" : "+";
var hours = Math.Abs(offset.Hours);
var minutes = Math.Abs(offset.Minutes);
var separator = includeColon ? ":" : "";
return string.Format("{0}{1:00}{2}{3:00}", sign, hours, separator, minutes);
}
public static TimeSpan FromTimeOffsetString(this string offsetString)
{
if (!offsetString.Contains(":"))
offsetString = offsetString.Insert(offsetString.Length - 2, ":");
offsetString = offsetString.TrimStart('+');
return TimeSpan.Parse(offsetString);
}
public static DateTime ToStableUniversalTime(this DateTime dateTime)
{
#if SILVERLIGHT
// Silverlight 3, 4 and 5 all work ok with DateTime.ToUniversalTime, but have no TimeZoneInfo.ConverTimeToUtc implementation.
return dateTime.ToUniversalTime();
#else
// .Net 2.0 - 3.5 has an issue with DateTime.ToUniversalTime, but works ok with TimeZoneInfo.ConvertTimeToUtc.
// .Net 4.0+ does this under the hood anyway.
return TimeZoneInfo.ConvertTimeToUtc(dateTime);
#endif
}
public static string FmtSortableDate(this DateTime from)
{
return from.ToString("yyyy-MM-dd");
}
public static string FmtSortableDateTime(this DateTime from)
{
return from.ToString("u");
}
public static DateTime LastMonday(this DateTime from)
{
var mondayOfWeek = from.Date.AddDays(-(int)from.DayOfWeek + 1);
return mondayOfWeek;
}
public static DateTime StartOfLastMonth(this DateTime from)
{
return new DateTime(from.Date.Year, from.Date.Month, 1).AddMonths(-1);
}
public static DateTime EndOfLastMonth(this DateTime from)
{
return new DateTime(from.Date.Year, from.Date.Month, 1).AddDays(-1);
}
}
}