Added the service locator pattern

Author: Habrador

Assets/Patterns/15. Service Locator.meta

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace ServiceLocator.AudioService
+{
+    //Implementation of the Service Locator example from the book Game Programming Patters
+    //This class used to test that the implementation is working
+    public class GameController : MonoBehaviour
+    {
+
+        void Start()
+        {
+            //Register the service provider in the Locator
+            ConsoleAudio audio = new ConsoleAudio();
+
+            Locator.Provide(audio);
+            //Locator.Provide(null);
+        }
+
+
+        void Update()
+        {
+            Audio audio = Locator.GetAudio();
+
+            if (Input.GetKeyDown(KeyCode.P))
+            {
+                audio.PlaySound(23);
+            }
+            else if (Input.GetKeyDown(KeyCode.S))
+            {
+                audio.StopSound(23);
+            }
+            else if (Input.GetKeyDown(KeyCode.Space))
+            {
+                audio.StopAllSounds();
+            }
+        }
+    }
+}

Assets/Patterns/15. Service Locator/Audio service locator.meta

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace ServiceLocator.AudioService
+{
+    //Service provider parent class
+    //This is the abstract class that determines which methods the service will be exposing
+    public abstract class Audio 
+    {
+        public abstract void PlaySound(int soundID);
+
+        public abstract void StopSound(int soundID);
+
+        public abstract void StopAllSounds();
+    }
+}

Assets/Patterns/15. Service Locator/Audio service locator/Scripts.meta

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace ServiceLocator.AudioService
+{
+    //Service provider child class
+    public class ConsoleAudio : Audio
+    {
+        public override void PlaySound(int soundID)
+        {
+            Debug.Log($"Sound {soundID} has started");
+        }
+
+        public override void StopSound(int soundID)
+        {
+            Debug.Log($"Sound {soundID} has stopped");
+        }
+
+        public override void StopAllSounds()
+        {
+            Debug.Log($"All sounds have stopped");
+        }
+    }
+}