Added GameObject Validators

Editor/Objects/ValidatorList.cs

@@ -10,6 +10,7 @@ namespace Module.ProjectValidator.Editor
     {
         private readonly Dictionary<Type, object> _attributeValidators = new();
         private readonly Dictionary<Type, List<object>> _componentValidators = new();
+        public readonly List<IGameObjectValidator> GameObjectValidators = new();
 
         public void AddAttribute(Type type)
         {
@@ -59,6 +60,22 @@ namespace Module.ProjectValidator.Editor
             }
         }
 
+        public void AddGameObject(Type type)
+        {
+            if (type.IsInterface || type.IsAbstract)
+                return;
+            
+            try
+            {
+                var instance = (IGameObjectValidator)FormatterServices.GetUninitializedObject(type);
+                GameObjectValidators.Add(instance);
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+            }
+        }
+
         public bool TryGetAttributeValidator(Type type, out object validatorInstance)
         {
             return _attributeValidators.TryGetValue(type, out validatorInstance);

Editor/Utilities/ProjectValidatorUtility.cs

@@ -38,14 +38,14 @@ namespace Module.ProjectValidator.Editor
             return window;
         }
 
-        internal static string GetAttributeShortName(Attribute attribute)
+        internal static string GetGameObjectValidatorName(IGameObjectValidator validator)
         {
-            var str = attribute.GetType().Name;
-            str = str.Replace("Attribute", string.Empty);
+            var str = validator.GetType().Name;
+            str = str.Replace("GameObjectValidator", string.Empty);
             str = ObjectNames.NicifyVariableName(str);
             return str;
         }
-        
+
         internal static string GetComponentValidatorShortName(object obj)
         {
             var str = obj.GetType().Name;
@@ -53,7 +53,15 @@ namespace Module.ProjectValidator.Editor
             str = ObjectNames.NicifyVariableName(str);
             return str;
         }
-        
+
+        internal static string GetAttributeShortName(Attribute attribute)
+        {
+            var str = attribute.GetType().Name;
+            str = str.Replace("Attribute", string.Empty);
+            str = ObjectNames.NicifyVariableName(str);
+            return str;
+        }
+
         internal static void AppendToScenePath(GameObject gameObject, ref string scenePath)
         {
             scenePath = string.IsNullOrEmpty(scenePath) ? gameObject.name : $"{scenePath}/{gameObject.name}";

Editor/ValidatorRunner.cs

@@ -40,7 +40,7 @@ namespace Module.ProjectValidator.Editor
                 ProjectValidatorUtility.OpenWindow();
 
             stopwatch.Stop();
-            Debug.Log(stopwatch.Elapsed.TotalMilliseconds + "ms");
+            Debug.Log($"Validator took {stopwatch.Elapsed.TotalMilliseconds}ms");
             return true;
         }
 
@@ -63,9 +63,10 @@ namespace Module.ProjectValidator.Editor
             
             _validatorList = new ValidatorList();
             _typeTree = new TypeTree();
-            
-            FetchAllAttributeValidators();
+
+            FetchAllGameObjectValidators();
             FetchAllComponentValidators();
+            FetchAllAttributeValidators();
             FetchAllTypesWithValidators<Component>(assemblies);
             FetchAllTypesWithValidators<ScriptableObject>(assemblies);
             _initialized = true;
@@ -100,6 +101,16 @@ namespace Module.ProjectValidator.Editor
                 _validatorList.AddAttribute(types[i]);
             }
         }
+
+        private static void FetchAllGameObjectValidators()
+        {
+            var types = TypeCache.GetTypesDerivedFrom(typeof(IGameObjectValidator));
+
+            for (var i = 0; i < types.Count; i++)
+            {
+                _validatorList.AddGameObject(types[i]);
+            }
+        }
         
         private static void FetchAllComponentValidators()
         {
@@ -188,19 +199,39 @@ namespace Module.ProjectValidator.Editor
         private static void ValidateGameObject(GameObject gameObject, string scenePath, Report report)
         {
             ProjectValidatorUtility.AppendToScenePath(gameObject, ref scenePath);
-            ValidateComponents(gameObject, scenePath, report);
+            
+            var assetGuid = EditorAssetUtility.GetAssetGuid(gameObject);
+            using var _ = ListPool<ValidatorResult>.Get(out var results);
+            
+            for (var i = 0; i < _validatorList.GameObjectValidators.Count; i++)
+            {
+                results.Clear();
+                
+                _validatorList.GameObjectValidators[i].Validate(gameObject, results);
+                var type = ProjectValidatorUtility.GetGameObjectValidatorName(_validatorList.GameObjectValidators[i]);
+
+                for (var j = 0; j < results.Count; j++)
+                {
+                    var result = results[j];
+                    
+                    if (result.Severity != EValidatorSeverity.Valid)
+                        report.Add(assetGuid, scenePath, string.Empty, type, result.Severity, result.Message);
+                }
+            }
+            
+            ValidateComponents(gameObject, assetGuid, scenePath, report);
             ValidateChildren(gameObject, scenePath, report);
         }
 
-        private static void ValidateComponents(GameObject gameObject, string scenePath, Report report)
+        private static void ValidateComponents(GameObject gameObject, GUID assetGuid, string scenePath, Report report)
         {
             using var _ = ListPool<Component>.Get(out var components);
-            var assetGuid = EditorAssetUtility.GetAssetGuid(gameObject);
             gameObject.GetComponents(components);
 
             for (var i = 0; i < components.Count; i++)
             {
-                Validate(assetGuid, scenePath, components[i], report);
+                if (components[i] != null)
+                    Validate(assetGuid, scenePath, components[i], report);
             }
         }
 

Editor/Validators/Component/ComponentValidatorSkinnedMeshRenderer.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Module.ProjectValidator.Editor
+{
+    internal sealed class ComponentValidatorSkinnedMeshRenderer : IComponentValidator<SkinnedMeshRenderer>
+    {
+        public void Validate(SkinnedMeshRenderer component, List<ValidatorResult> results)
+        {
+            var materials = component.sharedMaterials;
+
+            for (var i = 0; i < materials.Length; i++)
+            {
+                if (materials[i] == null)
+                    results.Add(ValidatorResult.Create(EValidatorSeverity.Error, $"Missing material in slot #{i}"));
+            }
+            
+            if (component.sharedMesh == null)
+                results.Add(ValidatorResult.Create(EValidatorSeverity.Error, "Missing mesh"));
+        }
+    }
+}

Editor/Validators/Component/ComponentValidatorSkinnedMeshRenderer.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 1610561c53a0aa84aaa903e5dde29694

Editor/Validators/GameObject.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 45fa253dcfa349d5b1e9bd56ebac7c98
+timeCreated: 1779133809

Editor/Validators/GameObject/GameObjectValidatorBrokenPrefab.cs

@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace Module.ProjectValidator.Editor
+{
+    internal sealed class GameObjectValidatorBrokenPrefab : IGameObjectValidator
+    {
+        public void Validate(GameObject gameObject, List<ValidatorResult> results)
+        {
+            if (PrefabUtility.IsPrefabAssetMissing(gameObject))
+                results.Add(ValidatorResult.Create(EValidatorSeverity.Error, "GameObject is missing prefab asset"));
+        }
+    }
+}

Editor/Validators/GameObject/GameObjectValidatorBrokenPrefab.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 8fd1dfcd3d564622a918e2175499318d
+timeCreated: 1779133864

Editor/Validators/GameObject/GameObjectValidatorMissingComponents.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace Module.ProjectValidator.Editor
+{
+    internal sealed class GameObjectValidatorMissingComponents : IGameObjectValidator
+    {
+        public void Validate(GameObject gameObject, List<ValidatorResult> results)
+        {
+            var count = GameObjectUtility.GetMonoBehavioursWithMissingScriptCount(gameObject);
+            
+            if (count != 0)
+                results.Add(ValidatorResult.Create(EValidatorSeverity.Error, $"GameObject is missing {count} component(s)"));
+        }
+    }
+}

Editor/Validators/GameObject/GameObjectValidatorMissingComponents.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 66cbc43729ec4e81a9e353e537b3ccf0
+timeCreated: 1779133947

README.md

@@ -9,6 +9,19 @@ A tool to help validate data across scenes, prefabs and scriptable objects.
 ![Hierachy Window](~Images/editor-hierarchy-window.png)
 ![Project Window](~Images/editor-project-window.png)
 
+## Game Object Validators
+
+```csharp
+public sealed class GameObjectValidatorBrokenPrefab : IGameObjectValidator
+{
+    public void Validate(GameObject gameObject, List<ValidatorResult> results)
+    {
+        if (PrefabUtility.IsPrefabAssetMissing(gameObject))
+            results.Add(ValidatorResult.Create(EValidatorSeverity.Error, "GameObject is missing prefab asset"));
+    }
+}
+```
+
 ## Component Validators
 
 ```csharp

Runtime/Interfaces/IGameObjectValidator.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Module.ProjectValidator
+{
+    public interface IGameObjectValidator
+    {
+        void Validate(GameObject gameObject, List<ValidatorResult> results);
+    }
+}

Runtime/Interfaces/IGameObjectValidator.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f7513a02611842029edd675cb64989ad
+timeCreated: 1779133097

package.json

@@ -1,6 +1,6 @@
 {
   "name": "com.module.project-validator",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "displayName": "Module.ProjectValidator",
   "description": "",
   "unity": "6000.3",