PowerToys/Wox/Storage/HistoryItem.cs

using System;

namespace Wox.Storage
{
    public class HistoryItem
    {
        public string Query { get; set; }
        public DateTime ExecutedDateTime { get; set; }

        public string GetTimeAgo()
        {
            return DateTimeAgo(ExecutedDateTime);
        }

        private string DateTimeAgo(DateTime dt)
        {
            var span = DateTime.Now - dt;
            if (span.Days > 365)
            {
                int years = (span.Days / 365);
                if (span.Days % 365 != 0)
                    years += 1;
                return $"about {years} {(years == 1 ? "year" : "years")} ago";
            }
            if (span.Days > 30)
            {
                int months = (span.Days / 30);
                if (span.Days % 31 != 0)
                    months += 1;
                return $"about {months} {(months == 1 ? "month" : "months")} ago";
            }
            if (span.Days > 0)
                return $"about {span.Days} {(span.Days == 1 ? "day" : "days")} ago";
            if (span.Hours > 0)
                return $"about {span.Hours} {(span.Hours == 1 ? "hour" : "hours")} ago";
            if (span.Minutes > 0)
                return $"about {span.Minutes} {(span.Minutes == 1 ? "minute" : "minutes")} ago";
            if (span.Seconds > 5)
                return $"about {span.Seconds} seconds ago";
            if (span.Seconds <= 5)
                return "just now";
            return string.Empty;
        }
    }
}