Implement basic networking

scripts/NetworkManager.cs

@@ -0,0 +1,101 @@
+using System.Threading.Tasks;
+using Godot;
+
+public partial class NetworkManager : Node
+{
+	[Export] public RPCNode RPCNode { get; private set; }
+
+	public static NetworkManager Singleton { get; private set; }
+
+	public int LocalNetId { get; private set; } = -1;
+
+	public override void _Ready()
+	{
+		Singleton = this;
+
+		if (Global.IsGameHost)
+		{
+			CreateServer();
+		}
+		else
+		{
+			CreateClient();
+		}
+
+		GetTree().GetMultiplayer().PeerConnected += OnPlayerConnected;
+		GetTree().GetMultiplayer().PeerDisconnected += OnPlayerDisconnected;
+		GetTree().GetMultiplayer().ServerDisconnected += OnServerClosed;
+	}
+
+	public override void _ExitTree()
+	{
+		GetTree().GetMultiplayer().MultiplayerPeer.Close();
+		GetTree().GetMultiplayer().MultiplayerPeer = null;
+	}
+
+	public void CreateServer()
+	{
+		ENetMultiplayerPeer peer = new();
+		peer.CreateServer(2142, 128);
+
+		GetTree().GetMultiplayer().MultiplayerPeer = peer;
+
+		LocalNetId = GetTree().GetMultiplayer().GetUniqueId();
+
+		_ = SpawnNetPlayer(LocalNetId);
+	}
+
+	public void CreateClient()
+	{
+		ENetMultiplayerPeer peer = new();
+		peer.CreateClient("127.0.0.1", 2142);
+
+		GetTree().GetMultiplayer().MultiplayerPeer = peer;
+
+		LocalNetId = GetTree().GetMultiplayer().GetUniqueId();
+
+		_ = SpawnNetPlayer(LocalNetId);
+	}
+
+	public void OnServerClosed()
+	{
+		GetTree().ChangeSceneToFile("res://scenes/main_menu.tscn");
+	}
+
+	public void OnPlayerConnected(long id)
+	{
+		if (Global.IsGameHost)
+		{
+			GameManager.Singleton.SendUniverseToClient(id);
+		}
+
+		_ = SpawnNetPlayer(id);
+	}
+
+	public void OnPlayerDisconnected(long id)
+	{
+		Player player = GetNode<Player>($"/root/Game/Space/Player-{id}");
+		GameManager.Singleton.DespawnPlayer(player);
+	}
+
+	private async Task SpawnNetPlayer(long id)
+	{
+		while (GameManager.Loading)
+		{
+			await Task.Delay(10);
+		}
+
+		bool isMainPlayer = LocalNetId == id;
+
+		Character character = new(GameManager.GameUniverse.Sectors[5, 5, 5], new(0, 0, 0));
+		Player player = GameManager.Singleton.SpawnPlayer(character, isMainPlayer);
+		player.Name = $"Player-{id}";
+
+		player.SetMultiplayerAuthority((int)id);
+
+		if (isMainPlayer && !Global.IsGameHost)
+		{
+			GameManager.Singleton.RpcId(1, nameof(GameManager.Singleton.RpcSendNearbySectors), character.CurrentSector.Coordinates, id);
+		}
+	}
+}