Google Apps Script that lists a lot of info about the files in a particular folder/sub folder structure including viewers, editors, and sharing access type

tellmeyoursecrets.js

function listFolders(folder) {
  var sheet = SpreadsheetApp.getActiveSheet();
  sheet.appendRow(["Folder Name" ,"Name","Sharing Access", "Get Editors", "Get Viewers", "Date", "URL"]);
  folderID = "ID"
  listFolder(sheet, folderID)
}

function listFolder(sheet, folderID) {
  var folder = DriveApp.getFolderById(folderID);
  addRootFilesToSheet(sheet, folder)
  addSubFoldersContentToSheet(sheet, folder)
}

function addRootFilesToSheet(sheet, folder) {
  var files = folder.getFiles();
  var cnt = 0;
  var file;
  while (files.hasNext()) {
    var file = files.next();
    var listEditors = file.getEditors();
    var editors = [];
    for (var cnt = 0; cnt < listEditors.length; cnt++) {
      editors.push(listEditors[cnt].getEmail());
    };
    var listViewers = file.getViewers();
    var viewers = [];
    for (var cnt = 0; cnt < listViewers.length; cnt++) {
      viewers.push(listViewers[cnt].getEmail());      
    }
    cnt++;
    data = [
      folder.getName(),
      file.getName(),
      file.getSharingAccess(),
      editors.toString(),
      viewers.toString(),
      file.getDateCreated(),
      file.getUrl(),
    ];
    sheet.appendRow(data);
  }
}

function addSubFoldersContentToSheet(sheet, folder) {
  var subfolders = folder.getFolders();
  Logger.log(subfolders)
  while (subfolders.hasNext()) {
    var subfolder = subfolders.next();
    Logger.log(subfolder.getName())
    var files = subfolder.getFiles();
    var cnt = 0;
    var file;
    while (files.hasNext()) {
      var file = files.next();
      var listEditors = file.getEditors();
      var editors = [];
      for (var cnt = 0; cnt < listEditors.length; cnt++) {
        editors.push(listEditors[cnt].getEmail());
      };
      var listViewers = file.getViewers();
      var viewers = [];
      for (var cnt = 0; cnt < listViewers.length; cnt++) {
        viewers.push(listViewers[cnt].getEmail());
      }
      cnt++;
      data = [
        folder.getName() + " / " + subfolder.getName(),
        file.getName(),
        file.getSharingAccess(),
        editors.toString(),
        viewers.toString(),
        file.getDateCreated(),
        file.getUrl(),
      ];
      sheet.appendRow(data);
    };
  }
}