CODE EXAMPLE FOR JAVASCRIPT

Converting google document to pdf using Scrips

function convertPDF() {
  doc = DocumentApp.getActiveDocument();
  // ADDED
  var docId = doc.getId();
  var docFolder = DriveApp.getFileById(docId).getParents().next().getId();
  // ADDED
  var ui = DocumentApp.getUi();
  var result = ui.alert(
      'Save As PDF?',
      'Save current document (Name:'+doc.getName()+'.pdf) as PDF',
      ui.ButtonSet.YES_NO);
  if (result == ui.Button.YES) {
    docblob = DocumentApp.getActiveDocument().getAs('application/pdf');
    /* Add the PDF extension */
    docblob.setName(doc.getName() + ".pdf");
    var file = DriveApp.createFile(docblob);
    // ADDED
    var fileId = file.getId();
    moveFileId(fileId, docFolder);
    // ADDED
    ui.alert('Your PDF file is available at ' + file.getUrl());
  } else {
    ui.alert('Request has been cancelled.');
  }
}
//placing a document into the correct folder.
function moveFileId(fileId, toFolderId) {
   var file = DriveApp.getFileById(fileId);
   var source_folder = DriveApp.getFileById(fileId).getParents().next();
   var folder = DriveApp.getFolderById(toFolderId)
   folder.addFile(file);
   source_folder.removeFile(file);
}