content: import React from 'react';
  import PropTypes from 'prop-types';
  import MediaModal from './media_modal';
  import OnboardingModal from './onboarding_modal';
  import VideoModal from './video_modal';
  import BoostModal from './boost_modal';
  import ConfirmationModal from './confirmation_modal';
  import ReportModal from './report_modal';
  import TransitionMotion from 'react-motion/lib/TransitionMotion';
  import spring from 'react-motion/lib/spring';
  
  const MODAL_COMPONENTS = {
    'MEDIA': MediaModal,
    'ONBOARDING': OnboardingModal,
    'VIDEO': VideoModal,
    'BOOST': BoostModal,
    'CONFIRM': ConfirmationModal,
    'REPORT': ReportModal,
  };
  
  export default class ModalRoot extends React.PureComponent {
  
    static propTypes = {
      type: PropTypes.string,
      props: PropTypes.object,
      onClose: PropTypes.func.isRequired,
    };
  
    handleKeyUp = (e) => {
      if ((e.key === 'Escape' || e.key === 'Esc' || e.keyCode === 27)
           && !!this.props.type) {
        this.props.onClose();
      }
    }
  
    componentDidMount () {
      window.addEventListener('keyup', this.handleKeyUp, false);
    }
  
    componentWillUnmount () {
      window.removeEventListener('keyup', this.handleKeyUp);
    }
  
    willEnter () {
      return { opacity: 0, scale: 0.98 };
    }
  
    willLeave () {
      return { opacity: spring(0), scale: spring(0.98) };
    }
  
    render () {
      const { type, props, onClose } = this.props;
      const visible = !!type;
      const items = [];
  
      if (visible) {
        items.push({
          key: type,
          data: { type, props },
          style: { opacity: spring(1), scale: spring(1, { stiffness: 120, damping: 14 }) },
        });
      }
  
      return (
        <TransitionMotion
          styles={items}
          willEnter={this.willEnter}
          willLeave={this.willLeave}
        >
          {interpolatedStyles =>
            <div className='modal-root'>
              {interpolatedStyles.map(({ key, data: { type, props }, style }) => {
                const SpecificComponent = MODAL_COMPONENTS[type];
  
                return (
                  <div key={key} style={{ pointerEvents: visible ? 'auto' : 'none' }}>
                    <div role='presentation' className='modal-root__overlay' style={{ opacity: style.opacity }} onClick={onClose} />
                    <div className='modal-root__container' style={{ opacity: style.opacity, transform: `translateZ(0px) scale(${style.scale})` }}>
                      <SpecificComponent {...props} onClose={onClose} />
                    </div>
                  </div>
                );
              })}
            </div>
          }
        </TransitionMotion>
      );
    }
  
  }
  