Implement SceneManager with asynchronous load/unload routines ready for bootstrapper scene. Implement simple level switching

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Assets/Scenes/Levels/Quarry.unity

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Assets/Scripts/LevelSwitch.cs

@@ -1,4 +1,5 @@
-using UnityEngine;
+using System;
+using UnityEngine;
 
 public class LevelSwitch : MonoBehaviour
 {
@@ -8,6 +9,9 @@ public class LevelSwitch : MonoBehaviour
 
     void Awake()
     {
+        if (iconRenderer == null)
+            iconRenderer = GetComponent<SpriteRenderer>();
+        
         interactable = GetComponent<Interactable>();
         if (interactable != null)
         {
@@ -27,6 +31,8 @@ public class LevelSwitch : MonoBehaviour
 #if UNITY_EDITOR
     void OnValidate()
     {
+        if (iconRenderer == null)
+            iconRenderer = GetComponent<SpriteRenderer>();
         ApplySwitchData();
     }
 #endif
@@ -42,9 +48,15 @@ public class LevelSwitch : MonoBehaviour
         }
     }
 
-    private void OnInteracted()
+    private async void OnInteracted()
     {
         Debug.Log($"LevelSwitch.OnInteracted: Switching to level {switchData?.targetLevelSceneName}");
-        // TODO: Add scene loading logic here, e.g. UnityEngine.SceneManagement.SceneManager.LoadScene(switchData.targetLevelSceneName);
+        if (switchData != null && !string.IsNullOrEmpty(switchData.targetLevelSceneName))
+        {
+            // Optionally: show loading UI here
+            var progress = new Progress<float>(p => Debug.Log($"Loading progress: {p * 100:F0}%"));
+            await SceneManagerService.Instance.SwitchSceneAsync(switchData.targetLevelSceneName, progress);
+            // Optionally: hide loading UI here
+        }
     }
 }

Assets/Scripts/SceneManagerService.cs

@@ -0,0 +1,183 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class SceneManagerService : MonoBehaviour
+{
+    public static SceneManagerService Instance { get; private set; }
+
+    // Events for scene lifecycle
+    public event Action<string> SceneLoadStarted;
+    public event Action<string, float> SceneLoadProgress;
+    public event Action<string> SceneLoadCompleted;
+    public event Action<string> SceneUnloadStarted;
+    public event Action<string, float> SceneUnloadProgress;
+    public event Action<string> SceneUnloadCompleted;
+
+    private readonly Dictionary<string, AsyncOperation> _activeLoads = new();
+    private readonly Dictionary<string, AsyncOperation> _activeUnloads = new();
+
+    void Awake()
+    {
+        if (Instance != null && Instance != this)
+        {
+            Destroy(gameObject);
+            return;
+        }
+        Instance = this;
+        DontDestroyOnLoad(gameObject);
+    }
+
+    // Load a single scene asynchronously (additive)
+    public async Task LoadSceneAsync(string sceneName, IProgress<float> progress = null)
+    {
+        SceneLoadStarted?.Invoke(sceneName);
+        var op = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
+        _activeLoads[sceneName] = op;
+        while (!op.isDone)
+        {
+            progress?.Report(op.progress);
+            SceneLoadProgress?.Invoke(sceneName, op.progress);
+            await Task.Yield();
+        }
+        _activeLoads.Remove(sceneName);
+        SceneLoadCompleted?.Invoke(sceneName);
+    }
+
+    // Unload a single scene asynchronously
+    public async Task UnloadSceneAsync(string sceneName, IProgress<float> progress = null)
+    {
+        var scene = SceneManager.GetSceneByName(sceneName);
+        if (!scene.isLoaded)
+        {
+            Debug.LogWarning($"SceneManagerService: Attempted to unload scene '{sceneName}', but it is not loaded.");
+            return;
+        }
+        SceneUnloadStarted?.Invoke(sceneName);
+        var op = SceneManager.UnloadSceneAsync(sceneName);
+        _activeUnloads[sceneName] = op;
+        while (!op.isDone)
+        {
+            progress?.Report(op.progress);
+            SceneUnloadProgress?.Invoke(sceneName, op.progress);
+            await Task.Yield();
+        }
+        _activeUnloads.Remove(sceneName);
+        SceneUnloadCompleted?.Invoke(sceneName);
+    }
+
+    // Load multiple scenes asynchronously
+    public async Task LoadScenesAsync(IEnumerable<string> sceneNames, IProgress<float> progress = null)
+    {
+        int total = 0;
+        int done = 0;
+        var ops = new List<AsyncOperation>();
+        foreach (var name in sceneNames)
+        {
+            total++;
+            var op = SceneManager.LoadSceneAsync(name, LoadSceneMode.Additive);
+            _activeLoads[name] = op;
+            ops.Add(op);
+            SceneLoadStarted?.Invoke(name);
+        }
+        while (done < total)
+        {
+            done = 0;
+            float aggregate = 0f;
+            foreach (var op in ops)
+            {
+                aggregate += op.progress;
+                if (op.isDone) done++;
+            }
+            float avg = aggregate / total;
+            progress?.Report(avg);
+            foreach (var name in sceneNames)
+                SceneLoadProgress?.Invoke(name, avg);
+            await Task.Yield();
+        }
+        foreach (var name in sceneNames)
+        {
+            _activeLoads.Remove(name);
+            SceneLoadCompleted?.Invoke(name);
+        }
+    }
+
+    // Unload multiple scenes asynchronously
+    public async Task UnloadScenesAsync(IEnumerable<string> sceneNames, IProgress<float> progress = null)
+    {
+        int total = 0;
+        int done = 0;
+        var ops = new List<AsyncOperation>();
+        foreach (var name in sceneNames)
+        {
+            total++;
+            var op = SceneManager.UnloadSceneAsync(name);
+            _activeUnloads[name] = op;
+            ops.Add(op);
+            SceneUnloadStarted?.Invoke(name);
+        }
+        while (done < total)
+        {
+            done = 0;
+            float aggregate = 0f;
+            foreach (var op in ops)
+            {
+                aggregate += op.progress;
+                if (op.isDone) done++;
+            }
+            float avg = aggregate / total;
+            progress?.Report(avg);
+            foreach (var name in sceneNames)
+                SceneUnloadProgress?.Invoke(name, avg);
+            await Task.Yield();
+        }
+        foreach (var name in sceneNames)
+        {
+            _activeUnloads.Remove(name);
+            SceneUnloadCompleted?.Invoke(name);
+        }
+    }
+
+    // Optionally: expose current progress for all active operations
+    public float GetAggregateLoadProgress()
+    {
+        if (_activeLoads.Count == 0) return 1f;
+        float sum = 0f;
+        foreach (var op in _activeLoads.Values) sum += op.progress;
+        return sum / _activeLoads.Count;
+    }
+    public float GetAggregateUnloadProgress()
+    {
+        if (_activeUnloads.Count == 0) return 1f;
+        float sum = 0f;
+        foreach (var op in _activeUnloads.Values) sum += op.progress;
+        return sum / _activeUnloads.Count;
+    }
+
+    // Tracks the currently loaded gameplay scene (not persistent/bootstrapper)
+    public string CurrentGameplayScene { get; private set; } = "AppleHillsOverworld";
+
+    // Switches from current gameplay scene to a new one
+    public async Task SwitchSceneAsync(string newSceneName, IProgress<float> progress = null)
+    {
+        // Load new scene
+        await LoadSceneAsync(newSceneName, progress);
+        // Unload previous scene (if not same)
+        if (!string.IsNullOrEmpty(CurrentGameplayScene) && CurrentGameplayScene != newSceneName)
+        {
+            var prevScene = SceneManager.GetSceneByName(CurrentGameplayScene);
+            if (prevScene.isLoaded)
+            {
+                await UnloadSceneAsync(CurrentGameplayScene);
+            }
+            else
+            {
+                Debug.LogWarning($"SceneManagerService: Previous scene '{CurrentGameplayScene}' is not loaded, skipping unload.");
+            }
+        }
+        // Update tracker
+        CurrentGameplayScene = newSceneName;
+    }
+}

Assets/Scripts/SceneManagerService.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 360f320f4d7a48e38f5fd7cdfa28144a
+timeCreated: 1756750090

ProjectSettings/EditorBuildSettings.asset

@@ -5,9 +5,15 @@ EditorBuildSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Scenes:
-  - enabled: 1
+  - enabled: 0
     path: Assets/Scenes/SampleScene.unity
     guid: 8c9cfa26abfee488c85f1582747f6a02
+  - enabled: 1
+    path: Assets/Scenes/AppleHillsOverworld.unity
+    guid: 350ef8129fba8174bb68b98a0f75e2f7
+  - enabled: 1
+    path: Assets/Scenes/Levels/Quarry.unity
+    guid: 7826cd123499e704bbed784f37ffe300
   m_configObjects:
     com.unity.input.settings.actions: {fileID: -944628639613478452, guid: 2bcd2660ca9b64942af0de543d8d7100, type: 3}
   m_UseUCBPForAssetBundles: 0