gsheets-script-duplicate-row.gs

/**
 * This function is set to run on a daily trigger so that
 * there is no need for manual intervention on the sheet.
 * 
 * The trigger was set up following this guide:
 * https://www.quora.com/How-can-I-periodically-run-a-Google-Script-on-a-Spreadsheet
 * 
 * You should be able to add this script to a new google sheet that uses
 * the same format by doing the following
 * - open the spreadsheet you want to add this script to
 * - go the Tools > Script editor...
 * - Copy-paste this code into a new file
 * - Edit the values of the UPPERCASE constants at the top of the file
 * - Setup a trigger to run the "updateSheet" function daily
 */

// The sheet we want to update
const SHEET_NAME = "Quantitative";
// The row that will contain the most recent data
const LATEST_ROW = 4;
// The column that contains the date (or week) information
const DATE_COLUMN = "A";

function updateSheet() {
  const sheet = SpreadsheetApp
    .getActiveSpreadsheet()
    .getSheetByName(SHEET_NAME);

  // Store the value of the date column for the latest row
  const latestWeek = new Date(sheet
    .getRange(`${DATE_COLUMN}${LATEST_ROW}`)
    .getValue());
  const now = new Date();

  // Only update the sheet if the latest row's date cell is in the past
  const shouldUpdate = latestWeek < now;

  if (!shouldUpdate) {
    return;
  }
  
  // Insert a blank row before the latest row
  sheet.insertRowsBefore(LATEST_ROW, 1);
  
  // The range represents the latest row from the first to last column.
  const lastColumn = sheet.getLastColumn();
  const range = sheet.getRange(LATEST_ROW + 1, 1, 1, lastColumn);

  // Copy the latest row to the row we just added
  // When contentsOnly is true, a "paste values" occurs. We want the functions, so it's set to false.
  range.copyTo(sheet.getRange(LATEST_ROW, 1, 1, lastColumn), {contentsOnly:false});
}