helper.util.js

import { fileURLToPath } from 'url';
import path from 'path';

const filename = (url) => fileURLToPath(url);
const dirname = (url) => path.dirname(filename(url));

function handleResponse(response) {
  const formatResponse = ({ ok, status, statusText }, data) => {
    const responseData = {
      success: ok,
      status: status,
      statusText: statusText,
      data
    };
    if (!response.ok) {
      return Promise.reject(responseData);
    }
    return responseData;
  };
  const contentType = response.headers.get('content-type');
  if (contentType && contentType.indexOf('application/json') !== -1) {
    return response.json().then((data) => formatResponse(response, data));
  } else {
    return response.text().then((data) => formatResponse(response, data));
  }
}

function median(arr) {
  const mid = Math.floor(arr.length / 2),
    nums = [...arr].sort((a, b) => a - b);
  return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
}

export { dirname, filename, handleResponse, median };