Google App Script - импортировать данные CSV из Gmail, манипулировать данными

Question

В настоящее время я пытаюсь манипулировать последними импортированными данными CSV из GMail на основе следующего кода:

    function importCSVFromGmail() {

  //gets first(latest) message with set label
  var threads = GmailApp.getUserLabelByName('PFC Redemption Limit').getThreads(0,1);     
//  var messages = threads[0].getMessages();
//  var message = messages[threads.getMessageCount()-1];
//  var attachment = message.getAttachments()[0];

  // Use length of the object to index last item
var first_thread = threads[0].getMessages();
var last_thread = threads[threads.length-1].getMessages();

// Only use last thread:
var last_thread_last_message = last_thread[last_thread.length-1];
var attachment = last_thread_last_message.getAttachments()[0];  

  // Is the attachment a CSV file
  if (attachment.getContentType() === "text/csv") {                            
    var ss = SpreadsheetApp.getActive();
    var sh = SpreadsheetApp.openById('xx').getSheetByName("Redemption Data")
    //parses content of csv to array
    var csvData = Utilities.parseCsv(attachment.getDataAsString(), ",");       
    // Remember to clear the content of the sheet before importing new data
    sh.clearContents().clearFormats();                                         
    //pastes array to sheet
    sh.getRange(1, 1, csvData.length, csvData[0].length).setValues(csvData);   


  //marks the Gmail message as read and unstars it (Filter sets a star)
  last_thread_last_message.markRead();                                                          
  last_thread_last_message.unstar();                                                            

//The code formats the code so it can be entered into the Google Script

function CSVToArray( strData, strDelimiter ){ 
  // Check to see if the delimiter is defined. If not,
  // then default to comma.
  strDelimiter = (strDelimiter || ",");

  // Create a regular expression to parse the CSV values.
  var objPattern = new RegExp(
    (
      // Delimiters.
      "(\\" + strDelimiter + "|\\r?\\n|\\r|^)" +


      // Quoted fields.
      "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" +


      // Standard fields.
      "([^\"\\" + strDelimiter + "\\r\\n]*))"
    ),
    "gi"
  );


  // Create an array to hold our data. Give the array
  // a default empty first row.
  var arrData = [[]];

  // Create an array to hold our individual pattern
  // matching groups.
  var arrMatches = null;

  // Keep looping over the regular expression matches
  // until we can no longer find a match.
  while (arrMatches = objPattern.exec( strData )){

    // Get the delimiter that was found.
    var strMatchedDelimiter = arrMatches[ 1 ];

    // Check to see if the given delimiter has a length
    // (is not the start of string) and if it matches
    // field delimiter. If id does not, then we know
    // that this delimiter is a row delimiter.
    if (
      strMatchedDelimiter.length &&
      (strMatchedDelimiter != strDelimiter)
    ){

      // Since we have reached a new row of data,
      // add an empty row to our data array.
      arrData.push( [] );


    // Now that we have our delimiter out of the way,
    // let's check to see which kind of value we
    // captured (quoted or unquoted).
    if (arrMatches[ 2 ]){

      // We found a quoted value. When we capture
      // this value, unescape any double quotes.
      var strMatchedValue = arrMatches[ 2 ].replace(
        new RegExp( "\"\"", "g" ),
        "\""
      );

    } else {

      // We found a non-quoted value.
      var strMatchedValue = arrMatches[ 3 ];

    }

    // Now that we have our value string, let's add
    // it to the data array.
    arrData[ arrData.length - 1 ].push( strMatchedValue );


  // Return the parsed data.
  return( arrData );

    }}}}}

Я думаю, что это может работать двумя способами: 1. Добавить скрипт для вычисления коэффициента погашения (однако он не работает с приведенным выше кодом.)

    var spreadsheet = SpreadsheetApp.openById('xx');
  spreadsheet.getRange('AH1').activate();
  spreadsheet.getCurrentCell().setValue('Redemption Rate');
  spreadsheet.getRange('AH2').activate();
  spreadsheet.getCurrentCell().setFormula('=K2/G2');
  spreadsheet.getActiveRange().autoFillToNeighbor(SpreadsheetApp.AutoFillSeries.DEFAULT_SERIES);
  var currentCell = spreadsheet.getCurrentCell();
  spreadsheet.getSelection().getNextDataRange(SpreadsheetApp.Direction.DOWN).activate();
  currentCell.activateAsCurrentCell();
  spreadsheet.getRange('AH2:AH').copyTo(spreadsheet.getActiveRange(), SpreadsheetApp.CopyPasteType.PASTE_VALUES, false);
  spreadsheet.getRange('AH2:AH').setNumberFormat('0.00%');

Чтобы добавить формулу к существующему листу -> Как импортировать данные CSV в лист Google, не затрагивая часть листа Google?

Это мой первый вопрос по stackoverflow.

Спасибо !!