netcode-02/Assets/Scripts/UIManager.cs

using TMPro;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.UI;

public class UIManager : MonoBehaviour
{
  [SerializeField]
  private Button startServerButton;

  [SerializeField]
  private Button startHostButton;

  [SerializeField]
  private Button startClientButton;

  [SerializeField]
  private Button leaveButton;

  [SerializeField]
  private GameObject connectedPanel;

  [SerializeField]
  private GameObject unconnectedPanel;

  //   [SerializeField]
  //   private TextMeshProUGUI playersInGameText;

  //   [SerializeField]
  //   private TMP_InputField joinCodeInput;

  //   [SerializeField]
  //   private Button executePhysicsButton;

  private bool hasServerStarted;

  private void Awake()
  {
    Cursor.visible = true;
  }

  void Update()
  {
    // playersInGameText.text = $"Players in game: {PlayersManager.Instance.PlayersInGame}";
  }

  void Start()
  {
    UnconnectedPanel();
    // START SERVER
    startServerButton?.onClick.AddListener(() =>
    {
      if (NetworkManager.Singleton.StartServer())
        ConnectedPanel();
    });

    // START HOST
    startHostButton?.onClick.AddListener(() =>
    {
      // this allows the UnityMultiplayer and UnityMultiplayerRelay scene to work with and without
      // relay features - if the Unity transport is found and is relay protocol then we redirect all the 
      // traffic through the relay, else it just uses a LAN type (UNET) communication.
      //   if (RelayManager.Instance.IsRelayEnabled)
      //     await RelayManager.Instance.SetupRelay();

      if (NetworkManager.Singleton.StartHost())
        ConnectedPanel();
    });

    // START CLIENT
    startClientButton?.onClick.AddListener(() =>
    {
      //   if (RelayManager.Instance.IsRelayEnabled && !string.IsNullOrEmpty(joinCodeInput.text))
      //     await RelayManager.Instance.JoinRelay(joinCodeInput.text);

      if (NetworkManager.Singleton.StartClient())
        ConnectedPanel();
      //   else
      //     Logger.Instance.LogInfo("Unable to start client...");
    });

    leaveButton?.onClick.AddListener(() =>
    {
      NetworkManager.Singleton.Shutdown();
      UnconnectedPanel();
    });
    // STATUS TYPE CALLBACKS
    // NetworkManager.Singleton.OnClientConnectedCallback += (id) =>
    // {
    //   Logger.Instance.LogInfo($"{id} just connected...");
    // };

    // NetworkManager.Singleton.OnServerStarted += () =>
    // {
    //   hasServerStarted = true;
    // };

    // executePhysicsButton.onClick.AddListener(() =>
    // {
    //   if (!hasServerStarted)
    //   {
    //     Logger.Instance.LogWarning("Server has not started...");
    //     return;
    //   }
    //   SpawnerControl.Instance.SpawnObjects();
    // });
  }

  void ConnectedPanel()
  {
    unconnectedPanel.SetActive(false);
    connectedPanel.SetActive(true);
  }
  void UnconnectedPanel()
  {
    unconnectedPanel.SetActive(true);
    connectedPanel.SetActive(false);
  }
}