Extract properties from class defs to common superclass

I've been looking at codemods and visitor examples but not finding a clear path to a solution. Any help would be appreciated. Assume I have already determined that a specific set of class names and property names need to be refactored. The refactoring involves adding the properties to a super class and removing the properties from the "source" classes.

For example:

before

```
class A(object):
foo = "foo value"
bar = "someothervalue"
other = "3rd other value"

class B(object):
baz = "someothervalue"
foo = "foo value"
bar = "someothervalue"
```

after

```
class common_class(object):
foo = "foo value"
bar = "someothervalue"

class A(object,common_class):
other = "3rd other value"

class B(object):
baz = "someothervalue"
```

Basically, I want to be able to extract properties to a common superclass. I'm thinking this is a codemod that takes a args for the superclass name, subclass names and property names to move

I am also thinking there are at least 3 passes to consider -
1. Identify which nodes are the property ASSIGN statements in the subclass targets and property names (which needs a lookup to check these). Also to remember if the soon-to-be subclasses already have a reference to the superclass name.
2. A pass to update or add the superclass block with one of the properties that match the subclass properties found in pass 1.
3. A pass to actually remove the properties from the sub classes where they were found (optionally comment out these)
4. A pass to update the subclass CLASSDEF to include the superclass name if not present

I'm just not sure what combination of metadata wrapper, transform and codemode (or matches) I need for this solution and I don't find a comprehensive example that does this sort of thing. I would have thought that subclass or member extraction refactoring was a common need in a refactoring tool.