Merge pull request #81 from ES2-UFPI/eryckkawa#64

add observer design pattern in this project #64

Assets/Scripts/Core/IObserver.cs

@@ -0,0 +1,4 @@
+public interface IObserver
+{
+    void OnNotify(object sender, object eventData);
+}

Assets/Scripts/Core/ISubject.cs

@@ -0,0 +1,6 @@
+public interface ISubject
+{
+    void RegisterObserver(IObserver observer);
+    void UnregisterObserver(IObserver observer);
+    void NotifyObservers(object eventData);
+}

Assets/Scripts/Core/Observer.cs

@@ -0,0 +1,11 @@
+using System.Diagnostics;
+using UnityEngine;
+
+public class Observer : MonoBehaviour, IObserver
+{
+    public void OnNotify(object sender, object eventData)
+    {
+        // Handle the event
+        UnityEngine.Debug.Log($"Received event from {sender} with data: {eventData}");
+    }
+}

Assets/Scripts/Core/Subject.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+
+public class Subject : ISubject
+{
+    private List<IObserver> observers = new List<IObserver>();
+
+    public void RegisterObserver(IObserver observer)
+    {
+        if (!observers.Contains(observer))
+        {
+            observers.Add(observer);
+        }
+    }
+
+    public void UnregisterObserver(IObserver observer)
+    {
+        if (observers.Contains(observer))
+        {
+            observers.Remove(observer);
+        }
+    }
+
+    public void NotifyObservers(object eventData)
+    {
+        foreach (var observer in observers)
+        {
+            observer.OnNotify(this, eventData);
+        }
+    }
+}