How to apply material to a "surface"

[Pixero]

I'm using the word "surface" here as I don't have a better name for it.
What I would like to do via ruby is to mimic how the paint bucket can apply a material to
a selection of faces that either have smooth/soft edges or where their outer loop is hard edges only.

[thomthom]

This might be useful: http://sketchucation.com/forums/viewtopic.php?f=180%26amp;t=41211#p538622

[Pixero]

Thanks Thomthom. I already found it.