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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 Service Stack LLC. All Rights Reserved.
//
// Licensed under the same terms of ServiceStack.
//
using System;
using System.Globalization;
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);
private static readonly DateTime MinDateTimeUtc = new DateTime(1, 1, 1, 0, 0, 0, DateTimeKind.Utc);
public static DateTime FromUnixTime(this int unixTime)
{
return UnixEpochDateTimeUtc + TimeSpan.FromSeconds(unixTime);
}
public static DateTime FromUnixTime(this double unixTime)
{
return UnixEpochDateTimeUtc + TimeSpan.FromSeconds(unixTime);
}
public static DateTime FromUnixTime(this long unixTime)
{
return UnixEpochDateTimeUtc + TimeSpan.FromSeconds(unixTime);
}
public static long ToUnixTimeMsAlt(this DateTime dateTime)
{
return (dateTime.ToStableUniversalTime().Ticks - UnixEpoch) / TimeSpan.TicksPerMillisecond;
}
public static long ToUnixTimeMs(this DateTime dateTime)
{
var universal = ToDateTimeSinceUnixEpoch(dateTime);
return (long)universal.TotalMilliseconds;
}
public static long ToUnixTime(this DateTime dateTime)
{
return (dateTime.ToDateTimeSinceUnixEpoch().Ticks) / TimeSpan.TicksPerSecond;
}
private static TimeSpan ToDateTimeSinceUnixEpoch(this DateTime dateTime)
{
var dtUtc = dateTime;
if (dateTime.Kind != DateTimeKind.Utc)
{
dtUtc = dateTime.Kind == DateTimeKind.Unspecified && dateTime > DateTime.MinValue && dateTime < DateTime.MaxValue
? DateTime.SpecifyKind(dateTime.Subtract(DateTimeSerializer.LocalTimeZone.GetUtcOffset(dateTime)), DateTimeKind.Utc)
: dateTime.ToStableUniversalTime();
}
var universal = dtUtc.Subtract(UnixEpochDateTimeUtc);
return universal;
}
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 DateTime.SpecifyKind(UnixEpochDateTimeUnspecified + TimeSpan.FromMilliseconds(msSince1970) + offset, DateTimeKind.Local);
}
public static DateTime FromUnixTimeMs(this double msSince1970, TimeSpan offset)
{
return DateTime.SpecifyKind(UnixEpochDateTimeUnspecified + TimeSpan.FromMilliseconds(msSince1970) + offset, DateTimeKind.Local);
}
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 DateTime Truncate(this DateTime dateTime, TimeSpan timeSpan)
{
return dateTime.AddTicks(-(dateTime.Ticks % timeSpan.Ticks));
}
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, string seperator = "")
{
var hours = Math.Abs(offset.Hours).ToString(CultureInfo.InvariantCulture);
var minutes = Math.Abs(offset.Minutes).ToString(CultureInfo.InvariantCulture);
return (offset < TimeSpan.Zero ? "-" : "+")
+ (hours.Length == 1 ? "0" + hours : hours)
+ seperator
+ (minutes.Length == 1 ? "0" + minutes : 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 (dateTime.Kind == DateTimeKind.Utc)
return dateTime;
if (dateTime == DateTime.MinValue)
return MinDateTimeUtc;
return PclExport.Instance.ToStableUniversalTime(dateTime);
}
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);
}
}
}