freeCodeCamp/client/utils/gatsby/layoutSelector.js

import React from 'react';
import PropTypes from 'prop-types';

import {
  CertificationLayout,
  DefaultLayout
} from '../../src/components/layouts';
import FourOhFourPage from '../../src/pages/404';

export default function layoutSelector({ element, props }) {
  const {
    location: { pathname }
  } = props;

  if (element.type === FourOhFourPage) {
    return <DefaultLayout pathname={pathname}>{element}</DefaultLayout>;
  }
  if (/^\/certification(\/.*)*/.test(pathname)) {
    return (
      <CertificationLayout pathname={pathname}>{element}</CertificationLayout>
    );
  }
  if (/^\/guide(\/.*)*/.test(pathname)) {
    console.log('Hitting guide for some reason. Need a redirect.');
  }

  const splitPath = pathname.split('/');
  const splitPathThree = splitPath.length > 2 ? splitPath[3] : '';

  const isNotSuperBlockIntro =
    splitPath.length > 3 && splitPathThree.length > 1;

  if (/^\/learn(\/.*)*/.test(pathname) && isNotSuperBlockIntro) {
    return (
      <DefaultLayout pathname={pathname} showFooter={false}>
        {element}
      </DefaultLayout>
    );
  }
  if (/^\/donation(\/.*)*|^\/$|^\/donate(\/.*)*/.test(pathname)) {
    return (
      <DefaultLayout pathname={pathname} useTheme={false}>
        {element}
      </DefaultLayout>
    );
  }
  return <DefaultLayout pathname={pathname}>{element}</DefaultLayout>;
}

layoutSelector.propTypes = {
  element: PropTypes.any,
  location: PropTypes.objectOf({ pathname: PropTypes.string }),
  props: PropTypes.any
};