Parse CSV and then filter values to run other script

Hi,

I'm new on the forum and I'm beginner at scripting.

I would like to parse a CSV (excel table) and then display/filter the values inside a popup (with dropdowns).

My goal is to select/isolate values from the csv and then run a script which will use these values

(as for example to create pages with specific dimensions)

I found and I updated this script to parse the CSV :

function csvCheck() {

    // check if "data.csv" exist

    var open = csv.open ('r')

    if(open == false){ 

        alert("You need to create data.csv");

            return;

    }

        csv.encoding = 'UTF8'; // set some encoding

        csv.lineFeed = 'Macintosh'; // set the linefeeds

        csv.open('r',undefined,undefined); // read the file

        var content = csv.read(); // get the text in it

        csv.close(); // close it again

        var lines = content.split(ret); // split the lines (windows should be '\r')

        var data = []; // will hold the data

        var keys = lines[0].split(sepa); // get the heads

        // loop lines

        for(var i = 1; i < lines.length;i++){

          var obj = {}; // temp object

          var cells = lines.split(sepa);// get the cells

        // loop rows

        for (var j = 0; j < keys.length; j++){

          // assign them to the heads

          obj[keys] = cells;

          }

          data.push(obj); // add to data

          }

        $.writeln(data.toSource());

}

csvCheck();

It works fine, but then I would like to display/filter the values

Something similar than the image below :

First dropdown =  first column of the CSV

Identical values should be merged

"Select" button should run another script

Thanks a lot for your help !