first commit

NitroxClient/GameLogic/Spawning/Metadata/Extractor/Abstract/EntityMetadataExtractor.cs

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+using NitroxModel.Core;
+using NitroxModel.DataStructures.GameLogic.Entities.Metadata;
+using NitroxModel.DataStructures.Util;
+
+namespace NitroxClient.GameLogic.Spawning.Metadata.Extractor.Abstract;
+
+public abstract class EntityMetadataExtractor<I, O> : IEntityMetadataExtractor where O : EntityMetadata
+{
+    public abstract O Extract(I entity);
+
+    public Optional<EntityMetadata> From(object o)
+    {
+        EntityMetadata result = Extract((I)o);
+
+        return Optional.OfNullable(result);
+    }
+
+    protected T Resolve<T>() where T : class
+    {
+        return NitroxServiceLocator.Cache<T>.Value;
+    }
+}