GlobalBehaviour.cs

using Newtonsoft.Json;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;

public class GlobalBehaviour : MonoBehaviour
{
    public static GlobalBehaviour Instance
    {
        get => _Instance;
        set
        {
            if (_Instance == null)
                _Instance = value;
            else
                Destroy(value);
        }
    }
    private static GlobalBehaviour _Instance;

    //Make sure when using RGBA-Colors, the A-value of animationStartColor 
    //and animationEndColor is the same OR try with value = 255
    public static Color HintAnimationStartColor => Instance._hintAnimationStartColor;
    public static Color HintAnimationEndColor => Instance._hintAnimationEndColor;
    public static float HintAnimationDuration => Instance._hintAnimationDuration;
    public static float AnimationLerpDuration => Instance._AnimationLerpDuration;

    public static Color StageAccomplished => Instance._StageAccomplished;
    public static Color StageNotYetAccomplished => Instance._StageNotYetAccomplished;
    public static Color StageError => Instance._StageError;

    public static float GadgetLaserDistance => Instance._GadgetLaserDistance;
    public static float GadgetPhysicalDistance => Instance._GadgetPhysicalDistance;

    #region Unity Serialization
    [SerializeField] private Color _hintAnimationStartColor;
    [SerializeField] private Color _hintAnimationEndColor;
    [SerializeField] private float _hintAnimationDuration;
    [SerializeField] private float _AnimationLerpDuration;

    [SerializeField] private Color _StageAccomplished;
    [SerializeField] private Color _StageNotYetAccomplished;
    [SerializeField] private Color _StageError;

    [SerializeField] private float _GadgetLaserDistance;
    [SerializeField] private float _GadgetPhysicalDistance;
    #endregion

    private void Awake()
    {
        Instance = this;
        DontDestroyOnLoad(this);
    }

    private void Start()
    {
        PostServerConnection();
    }


    //TODO: Move where appropiate

    public int tryScrollListTimes = 2;
    static public List<Scroll> AvailableScrolls;

    private void PostServerConnection()
    {
        StartCoroutine(getScrollsfromServer());

        IEnumerator getScrollsfromServer()
        {
            //Try /scroll/listAll endpoint when scroll/list is not working
            UnityWebRequest request = UnityWebRequest.Get(CommunicationEvents.ServerAdress + "/scroll/list");
            //Postman-Echo-Mock
            //UnityWebRequest request = UnityWebRequest.Get("https://019a8ea5-843a-498b-8d0c-778669aef987.mock.pstmn.io/get");

            for (int i = 0; i < this.tryScrollListTimes; i++)
            {
                request = UnityWebRequest.Get(CommunicationEvents.ServerAdress + "/scroll/list");
                request.method = UnityWebRequest.kHttpVerbGET;

                yield return request.SendWebRequest();

                if (request.result == UnityWebRequest.Result.ConnectionError
                 || request.result == UnityWebRequest.Result.ProtocolError)
                {
                    Debug.LogWarning(request.error);
                    Debug.Log("GET Scroll/list failed. Attempt: " + (i + 1).ToString());
                }
                else
                    break;
            }


            string jsonString = null;

            if (request.result == UnityWebRequest.Result.ConnectionError
             || request.result == UnityWebRequest.Result.ProtocolError)
            {
                Debug.LogWarning(request.error);
            }
            else
            {
                CommunicationEvents.ServerRunning = true;
                jsonString = request.downloadHandler.text;
            }

            if (string.IsNullOrEmpty(jsonString)
             || jsonString.Equals("[]"))
            {
                jsonString = File.ReadAllText(Application.streamingAssetsPath + "/scrolls.json");
                Debug.Log("Using Fallback Scrolls: \n" + jsonString);
            }

            System.DateTime startTime = System.DateTime.UtcNow;
            AvailableScrolls = JsonConvert.DeserializeObject<List<Scroll>>(jsonString);
            Debug.Log("Scroll Parsing in: " + (System.DateTime.UtcNow - startTime).TotalMilliseconds + "ms");
        }
    }
}