script-launcher/src/PromptConstructor.cs

using System.Globalization;
using System.Text;
using Spectre.Console;

namespace ScriptLauncher;

internal static class PromptConstructor
{
    const int ScriptListSize = 15;

    private static Style SelectionHighlight =>
        new(decoration: Decoration.Bold | Decoration.Underline);

    private static string FileStyle(FileInfo info, bool brief)
    {
        var builder = new StringBuilder();

        if (!brief)
        {
            builder.Append(
                CultureInfo.InvariantCulture,
                $"[blue]{info.DirectoryName}{Path.DirectorySeparatorChar}[/]"
            );
        }

        builder
            .Append(
                CultureInfo.InvariantCulture,
                $"[orangered1]{Path.GetFileNameWithoutExtension(info.Name)}[/]"
            )
            .Append(CultureInfo.InvariantCulture, $"[greenyellow]{info.Extension}[/]");

        return builder.ToString();
    }

    private static string DirectoryStyle(DirectoryInfo info) => $"[blue]{info}[/]";

    public static MultiSelectionPrompt<FileInfo> GetScriptPrompt(FileInfo[] files, bool brief)
    {
        var prompt = new MultiSelectionPrompt<FileInfo>()
            .Title("Select the scripts to execute:")
            .NotRequired()
            .PageSize(ScriptListSize)
            .InstructionsText(
                "[grey](Press [blue]<space>[/] to toggle a script, [green]<enter>[/] to accept)[/]"
            )
            .MoreChoicesText("[grey]Move up and down to reveal more options[/]")
            .UseConverter(x => FileStyle(x, brief))
            .HighlightStyle(SelectionHighlight)
            .AddChoices(files);

        return prompt;
    }

    public static SelectionPrompt<DirectoryInfo> GetDirectoryPrompt(DirectoryInfo[] directories)
    {
        var prompt = new SelectionPrompt<DirectoryInfo>()
            .Title("Select a directory:")
            .PageSize(ScriptListSize)
            .MoreChoicesText("[grey]Move up and down to reveal more options[/]")
            .UseConverter(DirectoryStyle)
            .HighlightStyle(SelectionHighlight)
            .AddChoices(directories);

        return prompt;
    }
}