test/Assets/PerfectWorld/Scripts/World/AddressableObject.cs

using BrewMonster.Scripts;
using Cysharp.Threading.Tasks;
using UnityEngine;

#if UNITY_EDITOR
using UnityEditor;
#endif

public class AddressableObject : MonoBehaviour
{
    public string assetPath;
    
    private GameObject _instance;
    private bool _isLoading;
    private int _loadRequestId;

    public bool IsLoaded => _instance != null;
    public bool IsLoading => _isLoading;

    public async UniTask LoadAsset()
    {
        if (string.IsNullOrEmpty(assetPath))
        {
            return;
        }

        if (_instance != null || _isLoading)
        {
            return;
        }

        _isLoading = true;
        int requestId = ++_loadRequestId;
        var model = await AddressableManager.Instance.LoadPrefabAsync(assetPath);
        
        // Object might have been destroyed while awaiting.
        if (this == null || gameObject == null)
        {
            return;
        }

        // If we got unloaded while loading, release the cached handle to avoid keeping RAM.
        if (requestId != _loadRequestId)
        {
            _isLoading = false;
            AddressableManager.Instance.ReleaseAsset(assetPath);
            return;
        }

        _isLoading = false;

        if (model != null && _instance == null)
        {
            _instance = Instantiate(model);
            var modelTransform = _instance.transform;
            modelTransform.SetParent(transform);
            modelTransform.localPosition = Vector3.zero;
            modelTransform.localRotation = Quaternion.identity;
            modelTransform.localScale = Vector3.one;
            _instance.SetActive(true);
        }
    }

    public void UnloadAsset()
    {
        // make the loading request invalid. 
        _loadRequestId++;
        _isLoading = false;

        if (_instance != null)
        {
            Destroy(_instance);
            _instance = null;
        }
        else if (transform.childCount > 0)
        {
            // Backward-compatible cleanup if older versions instantiated children without tracking.
            for (int i = transform.childCount - 1; i >= 0; i--)
            {
                Destroy(transform.GetChild(i).gameObject);
            }
        }

        if (string.IsNullOrEmpty(assetPath))
        {
            return;
        }
        AddressableManager.Instance.ReleaseAsset(assetPath);
    }

    #if UNITY_EDITOR
    public static string _modelPathPrefixToRemove = "Assets/ModelRenderer/Art/Models";
    [ContextMenu("Get Asset Path")]
    public void GetAssetPath()
    {
        var prefabObject = PrefabUtility.GetCorrespondingObjectFromSource(this.gameObject);
        if (prefabObject != null)
        {
            var path = AssetDatabase.GetAssetPath(prefabObject);
            //remove the prefix from the path
            path = path.Substring(_modelPathPrefixToRemove.Length + 1);
            //remove the .prefab suffix
            path = path.Substring(0, path.Length - ".prefab".Length);
            assetPath = path;

            // now delete all the children of this object
            while (transform.childCount > 0)
            {
                DestroyImmediate(transform.GetChild(0).gameObject);
            }

            //unpack completely the prefab
            PrefabUtility.UnpackPrefabInstance(this.gameObject, PrefabUnpackMode.Completely, InteractionMode.UserAction);
        }
        else
        {
            Debug.LogError("No prefab object found for this object");
        }
    }
    #endif
}