CommandLineProcessor.cs

using System;

namespace Simplify.WindowsServices.CommandLine;

/// <summary>
/// Provides windows-service command line processor
/// </summary>
/// <seealso cref="Simplify.WindowsServices.CommandLine.ICommandLineProcessor" />
public class CommandLineProcessor : ICommandLineProcessor
{
	private IInstallationController? _installationController;

	/// <summary>
	/// Gets or sets the current installation controller.
	/// </summary>
	/// <exception cref="ArgumentNullException"></exception>
	public IInstallationController InstallationController
	{
		get => _installationController ??= new InstallationController();
		set => _installationController = value ?? throw new ArgumentNullException(nameof(value));
	}

	/// <summary>
	/// Processes the command line arguments.
	/// </summary>
	/// <param name="args">The arguments.</param>
	/// <returns></returns>
	public virtual ProcessCommandLineResult ProcessCommandLineArguments(string[]? args)
	{
		if (args == null || args.Length == 0)
			return ProcessCommandLineResult.NoArguments;

		var action = ParseCommandLineArguments(args);

		switch (action)
		{
			case CommandLineAction.InstallService:
				InstallationController.InstallService();
				return ProcessCommandLineResult.CommandLineActionExecuted;

			case CommandLineAction.UninstallService:
				InstallationController.UninstallService();
				return ProcessCommandLineResult.CommandLineActionExecuted;

			case CommandLineAction.RunAsConsole:
				return ProcessCommandLineResult.SkipServiceStart;

			case CommandLineAction.UndefinedAction:
				break;

			default:
				throw new ArgumentOutOfRangeException();
		}

		Console.WriteLine($"Undefined service parameters: '{string.Concat(args)}'");
		Console.WriteLine("To install service use 'install' command");
		Console.WriteLine("To uninstall service use 'uninstall' command");

		return ProcessCommandLineResult.UndefinedParameters;
	}

	/// <summary>
	/// Parses the command line arguments.
	/// </summary>
	/// <param name="args">The arguments.</param>
	/// <returns></returns>
	public virtual CommandLineAction ParseCommandLineArguments(string[] args)
	{
		return args[0] switch
		{
			"install" => CommandLineAction.InstallService,
			"uninstall" => CommandLineAction.UninstallService,
			"console" => CommandLineAction.RunAsConsole,
			_ => CommandLineAction.UndefinedAction
		};
	}
}