TeamCity.CSharpInteractive/SettingCommandFactory.cs

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

using System.Text.RegularExpressions;

internal class SettingCommandFactory<TOption> : ICommandFactory<string>
    where TOption: struct, Enum
{
    private readonly Regex _regex;

    private readonly ILog<SettingCommandFactory<TOption>> _log;
    private readonly IStringService _stringService;
    private readonly ISettingDescription _setting;

    public SettingCommandFactory(
        ILog<SettingCommandFactory<TOption>> log,
        IStringService stringService,
        IEnumerable<ISettingDescription> settingDescriptions)
    {
        _setting = settingDescriptions.SingleOrDefault(i => i.SettingType == typeof(TOption)) ?? throw new ArgumentException($"{typeof(TOption).Name} has no description of type {nameof(ISettingDescription)}.");
        _regex = new Regex($@"^#{_setting.Key}\s+(.+)$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.IgnoreCase);
        _log = log;
        _stringService = stringService;
    }

    public int Order => 0;

    public IEnumerable<ICommand> Create(string replCommand)
    {
        var loadMatch = _regex.Match(replCommand);
        if (!loadMatch.Success)
        {
            yield break;
        }

        var rawParam = loadMatch.Groups[1].Value;
        if (Enum.TryParse<TOption>(_stringService.TrimAndUnquote(rawParam), true, out var verbosityLevel))
        {
            _log.Trace(() => new[] {new Text($"REPL {_setting.Key}({_setting.Description}) {rawParam} -> {verbosityLevel}")});
            yield return new SettingCommand<TOption>(verbosityLevel);
        }
        else
        {
            _log.Error(ErrorId.NotSupported, $"Invalid REPL command: \"{replCommand}\".");
            yield return HelpCommand.Shared;
        }
    }
}