p5.js-web-editor/client/modules/IDE/components/UploadFileModal.jsx

import React from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { Link } from 'react-router';
import prettyBytes from 'pretty-bytes';
import FileUploader from './FileUploader';
import { getreachedTotalSizeLimit } from '../selectors/users';
import ExitIcon from '../../../images/exit.svg';

const __process = (typeof global !== 'undefined' ? global : window).process;
const limit = __process.env.UPLOAD_LIMIT || 250000000;
const limitText = prettyBytes(limit);

class UploadFileModal extends React.Component {
  propTypes = {
    reachedTotalSizeLimit: PropTypes.bool.isRequired,
    closeModal: PropTypes.func.isRequired
  }

  componentDidMount() {
    this.focusOnModal();
  }

  focusOnModal = () => {
    this.modal.focus();
  }


  render() {
    return (
      <section className="modal" ref={(element) => { this.modal = element; }}>
        <div className="modal-content">
          <div className="modal__header">
            <h2 className="modal__title">Upload File</h2>
            <button
              className="modal__exit-button"
              onClick={this.props.closeModal}
              aria-label="Close upload file modal"
            >
              <ExitIcon focusable="false" aria-hidden="true" />
            </button>
          </div>
          { this.props.reachedTotalSizeLimit &&
            <p>
              {
                `Error: You cannot upload any more files. You have reached the total size limit of ${limitText}.
                If you would like to upload more, please remove the ones you aren't using anymore by
                in your `
              }
              <Link to="/assets" onClick={this.props.closeModal}>assets</Link>
              .
            </p>
          }
          { !this.props.reachedTotalSizeLimit &&
            <div>
              <FileUploader />
            </div>
          }
        </div>
      </section>
    );
  }
}

function mapStateToProps(state) {
  return {
    reachedTotalSizeLimit: getreachedTotalSizeLimit(state)
  };
}

export default connect(mapStateToProps)(UploadFileModal);