DateHelper.cs

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using System;
 
public class DateHelper
{
    private const int SECOND = 1;
 
    private const int MINUTE = 60;
 
    private const int HOUR = 3600;
 
    private const int DAY = 86400;
 
    private const int MONTH = 2592000;
 
    public static string GetLastTime(long time)
    {
        TimeSpan timeSpan = new TimeSpan(DateTime.UtcNow.Ticks - time);
        double num = Math.Abs(timeSpan.TotalSeconds);
        if (num < 60.0)
        {
            if (timeSpan.Seconds != 1)
            {
                return timeSpan.Seconds + " seconds ago";
            }
            return "one second ago";
        }
        if (num < 120.0)
        {
            return "a minute ago";
        }
        if (num < 2700.0)
        {
            return timeSpan.Minutes + " minutes ago";
        }
        if (num < 5400.0)
        {
            return "an hour ago";
        }
        if (num < 86400.0)
        {
            return timeSpan.Hours + " hours ago";
        }
        if (num < 172800.0)
        {
            return "yesterday";
        }
        if (num < 2592000.0)
        {
            return timeSpan.Days + " days ago";
        }
        if (num < 31104000.0)
        {
            int num2 = Convert.ToInt32(Math.Floor((double)timeSpan.Days / 30.0));
            if (num2 > 1)
            {
                return num2 + " months ago";
            }
            return "one month ago";
        }
        int num3 = Convert.ToInt32(Math.Floor((double)timeSpan.Days / 365.0));
        if (num3 > 1)
        {
            return num3 + " years ago";
        }
        return "one year ago";
    }
}