Broad rearrangement of handlers

Plugins/BlueprintMCP/Deprecated/UMCPHandler_RemoveStructField.h

@@ -0,0 +1,75 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "MCPHandler.h"
+#include "MCPFetcher.h"
+#include "MCPUtils.h"
+#include "StructUtils/UserDefinedStruct.h"
+#include "UserDefinedStructure/UserDefinedStructEditorData.h"
+#include "UMCPHandler_RemoveStructField.generated.h"
+
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+
+UCLASS(meta=(Group="Unclassified"))
+class UMCPHandler_RemoveStructField : public UObject, public IMCPHandler
+{
+	GENERATED_BODY()
+
+public:
+	UPROPERTY(meta=(Description="Struct name or package path"))
+	FString Struct;
+
+	UPROPERTY(meta=(Description="Name of the field to remove"))
+	FString FieldName;
+
+	virtual FString GetDescription() const override
+	{
+		return TEXT("Remove a field from a UserDefinedStruct asset.");
+	}
+
+	virtual void Handle(const FJsonObject* Json, FStringBuilderBase& Result) override
+	{
+		MCPFetcher F(Result);
+		UUserDefinedStruct* S = F.Walk(Struct).Cast<UUserDefinedStruct>();
+		if (!S) return;
+
+		// Find the field GUID by name
+		FGuid TargetGuid;
+		bool bFound = false;
+		for (const FStructVariableDescription& Var : FStructureEditorUtils::GetVarDesc(S))
+		{
+			if (Var.FriendlyName.Equals(FieldName, ESearchCase::IgnoreCase) ||
+				Var.VarName.ToString().Equals(FieldName, ESearchCase::IgnoreCase))
+			{
+				TargetGuid = Var.VarGuid;
+				bFound = true;
+				break;
+			}
+		}
+
+		if (!bFound)
+		{
+			Result.Appendf(TEXT("ERROR: Field '%s' not found in %s.\nAvailable fields:\n"),
+				*FieldName, *MCPUtils::FormatName(S));
+			for (const FStructVariableDescription& Var : FStructureEditorUtils::GetVarDesc(S))
+			{
+				Result.Appendf(TEXT("  %s\n"), *Var.FriendlyName);
+			}
+			return;
+		}
+
+		if (!FStructureEditorUtils::RemoveVariable(S, TargetGuid))
+		{
+			Result.Appendf(TEXT("ERROR: Failed to remove field '%s'."), *FieldName);
+			return;
+		}
+
+		bool bSaved = MCPUtils::SaveGenericPackage(S);
+		Result.Appendf(TEXT("Removed field %s from %s.%s\n"),
+			*FieldName, *MCPUtils::FormatName(S),
+			bSaved ? TEXT("") : TEXT(" WARNING: save failed."));
+	}
+};