AceField/Scripts/UI/LaunchScreen.cs

using Godot;

namespace AceField.Scripts.UI;

public partial class LaunchScreen : Control
{
	[Export] public int DefaultServerPort = 4343;
	[Export] public string DefaultServerAddr = "127.0.0.1";

	[Export] public Launcher Launcher;
	
	[Export] public LineEdit ServerPortInput;
	[Export] public LineEdit ServerAddrInput;
	[Export] public Button StartAsServerButton;
	[Export] public Button StartAsClientButton;

	private void ApplySize()
	{
		var screenSize = GetViewportRect().Size;

		Position = new Vector2(0, 0);
		Size = screenSize;
		GetNode<CenterContainer>("CenterContainer").Size = screenSize;
	}

	private bool DoValidation()
	{
		var addr = ServerAddrInput.Text;
		var port = ServerPortInput.Text;

		if (string.IsNullOrEmpty(addr)) return false;
		if (string.IsNullOrEmpty(port) || !int.TryParse(port, out _)) return false;

		return true;
	}

	public override void _Ready()
	{
		ApplySize();

		ServerPortInput.Text = DefaultServerPort.ToString();
		ServerAddrInput.Text = DefaultServerAddr;

		StartAsServerButton.Pressed += () =>
		{
			if (!DoValidation())
			{
				OS.Alert("Invalid multiplayer configuration.");
				return;
			}

			var port = ServerPortInput.Text;
			var result = Launcher.StartAsServer(int.Parse(port));

			if (result)
				Hide();
		};
		StartAsClientButton.Pressed += () =>
		{
			if (!DoValidation())
			{
				OS.Alert("Invalid multiplayer configuration.");
				return;
			}

			var addr = ServerAddrInput.Text;
			var port = ServerPortInput.Text;
			var result = Launcher.StartAsClient(addr, int.Parse(port));

			if (result)
				Hide();
		};
	}
}