//Microsoft Public License (Ms-PL)
//http://visualizer.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Redwerb.BizArk.Core.DateExt
{
///
/// Provides extension methods for dates.
///
public static class DateExt
{
///
/// Converts a Date to a string using relative time.
///
///
///
public static string ToRelativeTimeString(this DateTime value)
{
const int SECOND = 1;
const int MINUTE = 60 * SECOND;
const int HOUR = 60 * MINUTE;
const int DAY = 24 * HOUR;
const int MONTH = 30 * DAY;
var ts = DateTime.Now.Subtract(value);
double seconds = ts.TotalSeconds;
// Less than one minute
if (seconds < 1 * MINUTE)
return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
if (seconds < 60 * MINUTE)
return ts.Minutes + " minutes ago";
if (seconds < 120 * MINUTE)
return "an hour ago";
if (seconds < 24 * HOUR)
return ts.Hours + " hours ago";
if (seconds < 48 * HOUR)
return "yesterday";
if (seconds < 30 * DAY)
return ts.Days + " days ago";
if (seconds < 12 * MONTH)
{
int months = System.Convert.ToInt32(Math.Floor((double)ts.Days / 30));
return months <= 1 ? "one month ago" : months + " months ago";
}
int years = System.Convert.ToInt32(Math.Floor((double)ts.Days / 365));
return years <= 1 ? "one year ago" : years + " years ago";
}
}
}