TeamCity.CSharpInteractive/TargetFrameworkMonikerParser.cs

// ReSharper disable ClassNeverInstantiated.Global
namespace TeamCity.CSharpInteractive;

using System.Text.RegularExpressions;

internal class TargetFrameworkMonikerParser : ITargetFrameworkMonikerParser
{
    private static readonly Regex NetFull = new("^net\\d+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
    private static readonly Regex Net = new("^net[\\d\\.]+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
    private static readonly Regex NetCore = new("^netcoreapp[\\d\\.]+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
    private static readonly Regex NetStandard = new("^netstandard[\\d\\.]+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
    private static readonly Regex Uap = new("^uap[\\d\\.]+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);

    public string Parse(string tfm)
    {
        tfm = tfm.Trim();
        if (string.IsNullOrWhiteSpace(tfm))
        {
            return tfm;
        }

        if (NetFull.IsMatch(tfm))
        {
            var version = string.Join(".", tfm.Substring(3, tfm.Length - 3).Select(i => $"{i}"));
            return $".NETFramework,Version=v{version}";
        }

        if (Net.IsMatch(tfm))
        {
            var version = tfm.Substring(3, tfm.Length - 3);
            return $".NETCoreApp,Version=v{version}";
        }

        if (NetCore.IsMatch(tfm))
        {
            var version = tfm.Substring(10, tfm.Length - 10);
            return $".NETCoreApp,Version=v{version}";
        }

        if (NetStandard.IsMatch(tfm))
        {
            var version = tfm.Substring(11, tfm.Length - 11);
            return $".NETStandard,Version=v{version}";
        }

        // ReSharper disable once InvertIf
        if (Uap.IsMatch(tfm))
        {
            var version = tfm.Substring(3, tfm.Length - 3);
            return $"UAP,Version=v{version}";
        }

        return tfm;
    }
}