57 lines
2.4 KiB
C#
57 lines
2.4 KiB
C#
 
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using System.Globalization;
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namespace decePubClient.Components.Nerd;
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/// <summary>One line of a NerdTip; a row without a value is not shown.</summary>
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public sealed record NerdRow(string Label, string Value)
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{
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public static NerdRow Of(string label, object value) => new(label, value switch
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{
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null => null,
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DateTime time => Time(time),
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double number => number.ToString("0.###", CultureInfo.InvariantCulture),
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bool flag => flag ? "yes" : "no",
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IFormattable formattable => formattable.ToString(null, CultureInfo.InvariantCulture),
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_ => value.ToString()
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});
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/// <summary>A UTC time to the millisecond, as PrivaPub records it.</summary>
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public static string Time(DateTime time) =>
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DateTime.SpecifyKind(time, time.Kind == DateTimeKind.Unspecified ? DateTimeKind.Utc : time.Kind).ToUniversalTime()
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.ToString("yyyy-MM-dd HH:mm:ss.fff'Z'", CultureInfo.InvariantCulture);
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/// <summary>A duration the way a person reads it: 850 ms, 12.4 s, 3 min 5 s, 2 h 10 min, 4 d 3 h.</summary>
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public static string Duration(TimeSpan span)
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{
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var sign = span < TimeSpan.Zero ? "-" : string.Empty;
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span = span.Duration();
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return sign + (span.TotalSeconds switch
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{
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< 1 => $"{span.TotalMilliseconds:0} ms",
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< 60 => $"{span.TotalSeconds.ToString("0.0", CultureInfo.InvariantCulture)} s",
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< 3600 => $"{span.Minutes} min {span.Seconds} s",
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< 86400 => $"{(int)span.TotalHours} h {span.Minutes} min",
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_ => $"{(int)span.TotalDays} d {span.Hours} h"
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});
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}
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/// <summary>A byte count: 912 B, 14.2 KiB, 3.1 MiB.</summary>
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public static string Bytes(long? bytes) => bytes switch
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{
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null => null,
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< 1024 => $"{bytes} B",
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< 1024 * 1024 => $"{(bytes.Value / 1024d).ToString("0.0", CultureInfo.InvariantCulture)} KiB",
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_ => $"{(bytes.Value / 1048576d).ToString("0.0", CultureInfo.InvariantCulture)} MiB"
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};
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/// <summary>The great-circle distance between two points in kilometres (haversine, Earth radius 6371 km).</summary>
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public static double Kilometres(double latitude1, double longitude1, double latitude2, double longitude2)
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{
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const double radius = 6371;
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double Radians(double degrees) => degrees * Math.PI / 180;
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var dLatitude = Radians(latitude2 - latitude1);
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var dLongitude = Radians(longitude2 - longitude1);
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var a = Math.Pow(Math.Sin(dLatitude / 2), 2) + Math.Cos(Radians(latitude1)) * Math.Cos(Radians(latitude2)) * Math.Pow(Math.Sin(dLongitude / 2), 2);
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return 2 * radius * Math.Asin(Math.Min(1, Math.Sqrt(a)));
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}
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}
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