evershade/Assets/Scripts/Managers/NotificationManager.cs

using FishNet.Connection;
using FishNet.Object;
using TMPro;
using UnityEngine;

namespace Managers
{
    // each player will have its own instance of notification maanger.
    public class NotificationManager: NetworkBehaviour
    {
        [SerializeField] private GameObject notificationPrefab;
        [SerializeField] private Transform notificationParent;

        private GameObject _currentNotification;

        [Server]
        public void SendTargetedNotification(string message, NetworkConnection target)
        {
            TargetShowNotification(target, message);
        }

        [Server]
        public void BroadcastNotification(string message)
        {
            ShowNotificationObserverRpc(message);
        }

        [ObserversRpc]
        private void ShowNotificationObserverRpc(string message)
        {
           ShowNotification(message); 
        }

        [TargetRpc]
        private void TargetShowNotification(NetworkConnection target, string message)
        {
            ShowNotification(message);
        }

        private void ShowNotification(string message)
        {
            if (_currentNotification != null)
            {
                Destroy(_currentNotification);
            }

            _currentNotification = Instantiate(notificationPrefab, notificationParent);
            
            TMP_Text notificationText = _currentNotification.GetComponentInChildren<TMP_Text>();

            if (notificationText != null)
            {
                notificationText.text = message;
            }

            StartCoroutine(AutoHideNotification(5f));
        }

        private System.Collections.IEnumerator AutoHideNotification(float delay)
        {
            yield return new WaitForSeconds(delay);

            if (_currentNotification != null)
            {
                Destroy(_currentNotification);
                _currentNotification = null;
            }
        }
        
    }
}