project-undercover/Project Undercover/Assets/Scripts/Launcher.cs

using UnityEngine;
using UnityEngine.UI;

namespace Com.MyCompany.MyGame
{
    public class Launcher : Photon.PunBehaviour
    {
        #region Public Variables
        [Tooltip("The Ui Panel to let the user enter name, connect and play")]
        public GameObject controlPanel;
        [Tooltip("The UI Label to inform the user that the connection is in progress")]
        public Text progressLabel;
        public byte MaxPlayersPerRoom = 4;
        #endregion


        #region Private Variables
        string _gameVersion = "1";
        /// <summary>
        /// Keep track of the current process. Since connection is asynchronous and is based on several callbacks from Photon, 
        /// we need to keep track of this to properly adjust the behavior when we receive call back by Photon.
        /// Typically this is used for the OnConnectedToMaster() callback.
        /// </summary>
        bool isConnecting;
        #endregion


        #region MonoBehaviour CallBacks
        /// <summary>
        /// MonoBehaviour method called on GameObject by Unity during early initialization phase.
        /// </summary>
        void Awake()
        {
            // #Critical
            // we don't join the lobby. There is no need to join a lobby to get the list of rooms.
            PhotonNetwork.autoJoinLobby = false;


            // #Critical
            // This makes sure we can use PhotonNetwork.LoadLevel() on the master client
            // and all clients in the same room sync their level automatically
            PhotonNetwork.automaticallySyncScene = true;
        }


        /// <summary>
        /// MonoBehaviour method called on GameObject by Unity during initialization phase.
        /// </summary>
        void Start()
        {
            // progressLabel.SetActive(false);
            controlPanel.SetActive(true);
            //Connect();
        }
        #endregion


        #region Public Methods
        /// <summary>
        /// Start the connection process. 
        /// - If already connected, we attempt joining a random room
        /// - if not yet connected, Connect this application instance to Photon Cloud Network
        /// </summary>
        public void Connect()
        {
            // keep track of the will to join a room, because when we come back from the game we will get a callback that we are connected, so we need to know what to do then
            isConnecting = true;
            progressLabel.text = "Connecting...";
            // we check if we are connected or not, we join if we are , else we initiate the connection to the server.
            if (PhotonNetwork.connected)
            {
                // #Critical we need at this point to attempt joining a Random Room.
                // If it fails, we'll get notified in OnPhotonRandomJoinFailed() and we'll create one.
                PhotonNetwork.JoinRandomRoom();
            }
            else
            {
                // #Critical, we must first and foremost connect to Photon Online Server.
                PhotonNetwork.ConnectUsingSettings(_gameVersion);
            }
        }
        #endregion


        #region Photon.PunBehaviour CallBacks
        public override void OnConnectedToMaster()
        {
            Debug.Log("DemoAnimator/Launcher: OnConnectedToMaster() was called by PUN");
            // we don't want to do anything if we are not attempting to join a room. 
            // this case where isConnecting is false is typically when you lost or quit the game, when this level is loaded, OnConnectedToMaster will be called, in that case
            // we don't want to do anything.
            if (isConnecting)
            {
                // #Critical: The first we try to do is to join a potential existing room. If there is, good, else, we'll be called back with OnPhotonRandomJoinFailed()
                PhotonNetwork.JoinRandomRoom();
            }
        }


        public override void OnDisconnectedFromPhoton()
        {
            Debug.LogWarning("DemoAnimator/Launcher: OnDisconnectedFromPhoton() was called by PUN");
        }

        public override void OnPhotonRandomJoinFailed(object[] codeAndMsg)
        {
            Debug.Log("Launcher:OnPhotonRandomJoinFailed() was called by PUN. No random room available, so we create one." +
                "\nCalling: PhotonNetwork.CreateRoom(null, new RoomOptions() {maxPlayers = MaxPlayersPerRoom}, null);");
            // #Critical: we failed to join a random room, maybe none exists or they are all full. No worries, we create a new room.
            PhotonNetwork.CreateRoom(null, new RoomOptions() { MaxPlayers = MaxPlayersPerRoom }, null);
        }

        public override void OnJoinedRoom()
        {
            Debug.Log("Launcher: OnJoinedRoom() called by PUN. Now this client is in a room.");
            // #Critical: We only load if we are the first player, else we rely on  PhotonNetwork.automaticallySyncScene to sync our instance scene.
            PhotonNetwork.LoadLevel("Lobby");
        }
        #endregion
    }
}