I don't exactly remember what this code did, but it was part of my internship work. I guess you are smart enough to figure it out

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { Route, Redirect, withRouter } from 'react-router-dom';
import AppShell from '../../components/Appshell';
import Loader from '../../components/Loader';

const LoaderScene = ({ location }) => (
  <AppShell location={location}>
    <Loader />
  </AppShell>
);

LoaderScene.propTypes = {
  location: PropTypes.shape({
    pathname: PropTypes.string.isRequired,
  }).isRequired,
};

class ProtectedRoute extends Component {
  componentDidMount() {
    const { token, dispatchVerifyToken } = this.props;
    dispatchVerifyToken(token);
  }

  render() {
    const {
      component: RenderComponent,
      render,
      token,
      loading,
      location,
      ...rest
    } = this.props;

    if (!process.env.BROWSER) {
      return <LoaderScene location={location} />;
    }

    if (loading) {
      return <LoaderScene location={location} />;
    }

    if (typeof token === 'undefined') {
      return (
        <Redirect
          to={{
            pathname: '/login',
            state: { from: location },
          }}
        />
      );
    }

    if (RenderComponent) {
      return <Route {...rest} component={RenderComponent} />;
    }
    return <Route {...rest} render={render} />;
  }
}

ProtectedRoute.propTypes = {
  component: PropTypes.func,
  render: PropTypes.func,
  token: PropTypes.string,
  location: PropTypes.shape({
    pathname: PropTypes.string.isRequired,
  }).isRequired,
  dispatchVerifyToken: PropTypes.func.isRequired,
  loading: PropTypes.bool.isRequired,
};

ProtectedRoute.defaultProps = {
  component: undefined,
  render: undefined,
  token: undefined,
};

export default withRouter(ProtectedRoute);