Util.cs


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namespace HyperBooru.Util;

public static class Extensions {
    public static readonly string[] MagnitudeOrders = new[] {
        "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"
    };

    public static DateTime? TryParseDateTimeUtc(this string s) {
        bool success = DateTime.TryParse(s, out var dateTime);
        return success ? DateTime.SpecifyKind(dateTime, DateTimeKind.Utc) : null;
    }

    public static string ToBytesSI(this long x) {
        var exp = (int) Math.Log10(x);
        var suffix = MagnitudeOrders.ElementAtOrDefault(exp / 3 - 1);
        if(suffix is null)
            return x.ToString();
        double n = x / Math.Pow(10, exp / 3 * 3);
        return $"{Math.Round(n, 2 - (exp % 3))} {suffix}B";
    }
}