spectre.console/src/Spectre.Console/Cli/Internal/Parsing/CommandTree.cs

namespace Spectre.Console.Cli;

internal sealed class CommandTree
{
    public CommandInfo Command { get; }
    public List<MappedCommandParameter> Mapped { get; }
    public List<CommandParameter> Unmapped { get; }
    public CommandTree? Parent { get; }
    public CommandTree? Next { get; set; }
    public bool ShowHelp { get; set; }

    public CommandTree(CommandTree? parent, CommandInfo command)
    {
        Parent = parent;
        Command = command;
        Mapped = new List<MappedCommandParameter>();
        Unmapped = new List<CommandParameter>();
    }

    public ICommand CreateCommand(ITypeResolver resolver)
    {
        if (Command.Delegate != null)
        {
            return new DelegateCommand(Command.Delegate);
        }

        if (resolver.Resolve(Command.CommandType) is ICommand command)
        {
            return command;
        }

        throw CommandParseException.CouldNotCreateCommand(Command.CommandType);
    }
}