Quick function to walk a local directory and return a Javascript object of it's files\folder structure

node.walk.js

/*
 * Recursively walk a directory and return JSON.
 * @param {string} dir - root dir to walk, must supply this.
 * @param {object} structure - internal object to build, no need to supply this.
 */
let walkDir = (dir, structure = []) => {
  let files = fs.readdirSync(dir);

  files.forEach((node, i) => {
    let here = path.join(dir, node);
    let type = fs.statSync(here);

    if (type.isDirectory()) {
      structure[i] = {
        type: 'folder',
        folderName: node,
        files: walkDir(here)
      };
    }

    else if (type.isFile()) {
      structure[i] = {
        createdAt: type.birthtime || type.ctime,
        fileName: node,
        fileSize: type.size,
        lastModified: type.mtime,
        type: 'file' // TODO: Hook this up to actual file type.
      };
    }
  });

  return structure;
};