Script Position files and flatten transparencies and fonts

I try to explain as best I can, forgive me for the English from Google, I'm Italian 😞
@m1b @Met1 
The script would consist of 2 parts,

part 1:
The upper one, where there is a File button to search for files (*.ai, *.pdf) to import as a link (place in page).
The script must have the selection of the page range to import (place) example 1 of 12 (12 the maximum number of pages found in the file).

Part 2:
Below, in the Flattening transparency section, there will be 3 radio buttons.

° None: Nothing is applied
° Text: Apply the Saved Preset [TEXT TO OUTLINE] from the flattener panel
° Text and Trace: Apply the Saved Preset [TEXT/TRACE TO OUTLINES] from the flattener panel

the conversion will be applied to the pages selected below:
page from - to . (1 - 12)

------------
When OK is pressed the script will have to check with an IF/ELSE if the preset stored in the transparency conversion panel exists.
(the 2 presets are highlighted in the photo)
Therefore, before applying the flattener, he must check if the preset exists, if he doesn't find it (at the first launch of the script), he must create it.

if = true {
Apply the presets
} else = false {
CREATE the 2 presets
Apply the preset chosen in the radio button
}