Pun-01/Assets/Scripts/GameManager.cs

using UnityEngine;
using UnityEngine.SceneManagement;

using Photon.Pun;
using Photon.Realtime;

namespace cc.ivanli.pun01
{
    public class GameManager : MonoBehaviourPunCallbacks
    {
        public static GameManager Instance;

        [Tooltip("The prefab to use for representing the player")]
        public GameObject playerPrefab;

        [System.Obsolete]
        void Start()
        {
            Instance = this;

            if (!playerPrefab)
            {
                Debug.LogError("<Color=Red><a>Missing</a></Color> playerPrefab Reference. Please set it up in GameObject 'Game Manager'", this);
            }
            else if (!PlayerManager.LocalPlayerInstance)
            {
                Debug.LogFormat("We are Instantiating LocalPlayer from {0}", Application.loadedLevelName);
                // we're in a room. spawn a character for the local player. it gets synced by using PhotonNetwork.Instantiate
                PhotonNetwork.Instantiate(this.playerPrefab.name, new Vector3(0f, 5f, 0f), Quaternion.identity, 0);
            }
            else
            {
                Debug.LogFormat("Ignoring scene load for {0}", SceneManagerHelper.ActiveSceneName);
            }
        }

        public override void OnLeftRoom()
        {
            base.OnLeftRoom();
            SceneManager.LoadScene(0);
        }

        public void LeaveRoom()
        {
            PhotonNetwork.LeaveRoom();
        }

        public void LoadArena()
        {
            if (!PhotonNetwork.IsMasterClient)
            {
                Debug.LogError("PhotonNetwork : Trying to Load a level but we are not the master Client");
            }
            Debug.LogFormat("PhotonNetwork : Loading Level : {0}", PhotonNetwork.CurrentRoom.PlayerCount);
            PhotonNetwork.LoadLevel("Room for " + PhotonNetwork.CurrentRoom.PlayerCount);
        }

        public override void OnPlayerEnteredRoom(Player other)
        {
            Debug.LogFormat("OnPlayerEnteredRoom() {0}", other.NickName); // not seen if you're the player connecting


            if (PhotonNetwork.IsMasterClient)
            {
                Debug.LogFormat("OnPlayerEnteredRoom IsMasterClient {0}", PhotonNetwork.IsMasterClient); // called before OnPlayerLeftRoom


                LoadArena();
            }
        }


        public override void OnPlayerLeftRoom(Player other)
        {
            Debug.LogFormat("OnPlayerLeftRoom() {0}", other.NickName); // seen when other disconnects


            if (PhotonNetwork.IsMasterClient)
            {
                Debug.LogFormat("OnPlayerLeftRoom IsMasterClient {0}", PhotonNetwork.IsMasterClient); // called before OnPlayerLeftRoom


                LoadArena();
            }
        }
    }
}