justDuIt

export const countSize = (node) => {
  return reduce((size, element) => {
    if (element.type === 'file') {
      return (size + element.meta.size);
    }
    return size;
  }, node, 0);
};

export const sortDu = (array) => array.sort((prev, next) => {
  const [name1, size1] = prev;
  const [name2, size2] = next;
  if (size1 > size2) {
    return -1;
  }
  if (size1 < size2) {
    return 1;
  }
  return 0;
});

export default (tree) => {
  const duIt = tree.children.map(element => [element.name, countSize(element)]);
  return sortDu(duIt);
};