fleet/frontend/components/StackedWhiteBoxes/StackedWhiteBoxes.jsx

import React, { Component, PropTypes } from 'react';
import { Link } from 'react-router';
import classnames from 'classnames';

const baseClass = 'stacked-white-boxes';

class StackedWhiteBoxes extends Component {
  static propTypes = {
    children: PropTypes.element,
    headerText: PropTypes.string,
    className: PropTypes.string,
    leadText: PropTypes.string,
    onLeave: PropTypes.func,
    previousLocation: PropTypes.string,
  };

  constructor (props) {
    super(props);

    this.state = {
      isLoading: false,
      isLoaded: false,
      isLeaving: false,
    };
  }

  componentWillMount () {
    this.setState({
      isLoading: true,
    });
  }

  /* eslint-disable react/no-did-mount-set-state */
  componentDidMount () {
    this.setState({
      isLoading: false,
      isLoaded: true,
    });
  }
  /* eslint-enable react/no-did-mount-set-state */

  nowLeaving = (evt) => {
    const { window } = global;
    const { onLeave, previousLocation } = this.props;
    evt.preventDefault();

    this.setState({
      isLoading: false,
      isLoaded: false,
      isLeaving: true,
    });

    if (previousLocation) {
      window.setTimeout(
        () => { onLeave(previousLocation); },
        300
      );
    }

    return false;
  }

  renderBackButton = () => {
    const { previousLocation } = this.props;
    const { nowLeaving } = this;

    if (!previousLocation) return false;

    return (
      <div className={`${baseClass}__back`}>
        <Link to={previousLocation} className={`${baseClass}__back-link`} onClick={nowLeaving}>╳</Link>
      </div>
    );
  }

  renderHeader = () => {
    const { headerText } = this.props;

    return (
      <div className={`${baseClass}__header`}>
        <p className={`${baseClass}__header-text`}>{headerText}</p>
      </div>
    );
  }

  render () {
    const { children, className, leadText } = this.props;
    const {
      isLoading,
      isLoaded,
      isLeaving,
    } = this.state;
    const { renderBackButton, renderHeader } = this;

    const boxClass = classnames(
      baseClass,
      className,
      {
        [`${baseClass}--loading`]: isLoading,
        [`${baseClass}--loaded`]: isLoaded,
        [`${baseClass}--leaving`]: isLeaving,
      }
    );

    return (
      <div className={boxClass}>
        <div className={`${baseClass}__box`}>
          {renderBackButton()}
          {renderHeader()}
          <p className={`${baseClass}__box-text`}>{leadText}</p>
          {children}
        </div>
      </div>
    );
  }
}

export default StackedWhiteBoxes;