mmind

/** renameFields items->children **/
const renameFields = (obj) => ({
  name: obj.title,
  url: obj.url,
  children: obj.items,
});

/** transform Data **/
const transformData = (data) => {
  const renamedData = renameFields(data);
  
  if(data.items) {
    renamedData.children = renamedData.children.map((child) => renamedData(child));
    return renamedData;
  }
  
  if(data.items === null) {
    renamedData.children = [];
    return renamedData;
  }
  
  return renamedData;
}