Add codemod function

src/zrb/util/codemod/add_parent_to_class.py

@@ -0,0 +1,38 @@
+import libcst as cst
+
+
+class ParentClassAdder(cst.CSTTransformer):
+    def __init__(self, class_name: str, parent_class_name: str):
+        self.class_name = class_name
+        self.parent_class_name = parent_class_name
+        self.class_found = False
+
+    def leave_ClassDef(
+        self, original_node: cst.ClassDef, updated_node: cst.ClassDef
+    ) -> cst.ClassDef:
+        # Check if this is the target class
+        if original_node.name.value == self.class_name:
+            self.class_found = True
+            # Add the parent class to the existing bases
+            new_bases = (
+                *updated_node.bases,
+                cst.Arg(value=cst.Name(self.parent_class_name)),
+            )
+            return updated_node.with_changes(bases=new_bases)
+        return updated_node
+
+
+def add_parent_to_class(
+    original_code: str, class_name: str, parent_class_name: str
+) -> str:
+    # Parse the original code into a module
+    module = cst.parse_module(original_code)
+    # Initialize transformer with the class name and parent class name
+    transformer = ParentClassAdder(class_name, parent_class_name)
+    # Apply the transformation
+    modified_module = module.visit(transformer)
+    # Check if the class was found
+    if not transformer.class_found:
+        raise ValueError(f"Class {class_name} not found in the provided code.")
+    # Return the modified code
+    return modified_module.code