Google Apps Script: Copy Files With Hierarchy and Permissions

google_apps_script_copy_files_with_heirarchy_and_permissions

function copyDriveWithPermissions(){
      var originFolder = DriveApp.getFolderById("XXX-XXX");
      var destinationFolder = DriveApp.getFolderById("XXX-XXX");
      var currentFolder = destinationFolder;
      var totalCount = traverseFolder(originFolder,0, currentFolder);
}

function traverseFolder(folder,total, currentFolder) {

  
  var name = folder.getName();
  var count = 0;
  var files = folder.getFiles();
  
  copyFiles(files, currentFolder);
  
  Logger.log('\n'+name+' has ' + count+' files\n----------------------\n' );
  var subs = folder.getFolders();
  while (subs.hasNext()) {
    
    var subfolder = subs.next();
    
    var subsParents = subfolder.getParents();
      
        var thisFolder = subfolder.getName();
        //if folder doesn't exist localy create it
        if(!(currentFolder.getFoldersByName(thisFolder)).hasNext()){
          currentFolder = currentFolder.createFolder(thisFolder);
        }else{
          var returnedFolders = currentFolder.getFoldersByName(thisFolder);
          currentFolder = returnedFolders.next();
        }
           
    
    total+=traverseFolder(subfolder,count, currentFolder);
  }
  return total;
}


function copyFiles(files, currentFolder){
           
  var file, date, access, url, permission;
  var privacy, view, viewers, edit, editors;
  
  while ( files.hasNext() ) {
    
    file = files.next();
               
    //copy file
    var newId = (file.makeCopy(file.getName(), currentFolder)).getId();

    //set permissions for new file
    var newFile = DriveApp.getFileById(newId);
       
    try {
      
      access     = file.getSharingAccess();
      permission = file.getSharingPermission();
      viewers    = file.getViewers();      
      editors    = file.getEditors();

      
      for (var v=0; v<viewers.length; v++) {
        newFile.addViewer(viewers[v]);
      }
      
      for (var ed=0; ed<editors.length; ed++) { 
        newFile.addEditor(editors[ed]);
      }
      
      
    } catch (e) {Logger.log(e.toString()); Logger.log(file.getName());};
       
  }
}