NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/NPC/NPCBlackboardSerializer.cs

@@ -0,0 +1,80 @@
+using Robust.Shared.Reflection;
+using Robust.Shared.Serialization.Manager;
+using Robust.Shared.Serialization.Markdown;
+using Robust.Shared.Serialization.Markdown.Mapping;
+using Robust.Shared.Serialization.Markdown.Validation;
+using Robust.Shared.Serialization.TypeSerializers.Interfaces;
+using Robust.Shared.Utility;
+
+namespace Content.Server.NPC;
+
+public sealed class NPCBlackboardSerializer : ITypeReader<NPCBlackboard, MappingDataNode>
+{
+    public ValidationNode Validate(ISerializationManager serializationManager, MappingDataNode node,
+        IDependencyCollection dependencies, ISerializationContext? context = null)
+    {
+        var validated = new List<ValidationNode>();
+
+        if (node.Count > 0)
+        {
+            var reflection = dependencies.Resolve<IReflectionManager>();
+
+            foreach (var data in node)
+            {
+                var key = data.Key.ToYamlNode().AsString();
+
+                if (data.Value.Tag == null)
+                {
+                    validated.Add(new ErrorNode(data.Key, $"Unable to validate {key}'s type"));
+                    continue;
+                }
+
+                var typeString = data.Value.Tag[6..];
+
+                if (!reflection.TryLooseGetType(typeString, out var type))
+                {
+                    validated.Add(new ErrorNode(data.Key, $"Unable to find type for {typeString}"));
+                    continue;
+                }
+
+                var validatedNode = serializationManager.ValidateNode(type, data.Value, context);
+                validated.Add(validatedNode);
+            }
+        }
+
+        return new ValidatedSequenceNode(validated);
+    }
+
+    public NPCBlackboard Read(ISerializationManager serializationManager, MappingDataNode node, IDependencyCollection dependencies,
+        bool skipHook, ISerializationContext? context = null, NPCBlackboard? value = default)
+    {
+        value ??= new NPCBlackboard();
+
+        if (node.Count > 0)
+        {
+            var reflection = dependencies.Resolve<IReflectionManager>();
+
+            foreach (var data in node)
+            {
+                var key = data.Key.ToYamlNode().AsString();
+
+                if (data.Value.Tag == null)
+                    throw new NullReferenceException($"Found null tag for {key}");
+
+                var typeString = data.Value.Tag[6..];
+
+                if (!reflection.TryLooseGetType(typeString, out var type))
+                    throw new NullReferenceException($"Found null type for {key}");
+
+                var bbData = serializationManager.Read(type, data.Value, context, skipHook);
+
+                if (bbData == null)
+                    throw new NullReferenceException($"Found null data for {key}, expected {type}");
+
+                value.SetValue(key, bbData);
+            }
+        }
+
+        return value;
+    }
+}