Script to change layer visibility, resize and align

Hey all,

  I've seen some amazingly helpful script posts (Like this one) and found some premade scipts like MatchObjects that get me close, but I figured I'd give it a try and see if anyone has any suggestions for combining a few different things.
I'm wanting to use Data Merge/Variables do the following:

• Determine what shape I want visible and what fill (linked image) I want used.
• Resize the fill layer to match either the length or width of the visible shape (F or B), whichever is larger, constraining proportions
• Align the fill layer to the top, middle of the shape
• Use the shape as a clipping mask
• Copy the stroke colour of the shape to the clipping mask
• Save each clipping mask individually

I'm not sure if I need my file structure different, like all F&B files in their own group or layer? Any advice or links to documentation is appreciated. I have found it hard to find articles or videos related to indepth data variable options.
Thanks!