@r/platform/lib/modules/url.js

import React from 'react';
import { connect } from 'react-redux';
import { createSelector } from 'reselect';
import pathToRegex from 'path-to-regexp';

const T = React.PropTypes;

export class Case extends React.Component {
  static propTypes = {
    url: T.string.isRequired,
    exec: T.func.isRequired,
    pageProperties: T.object,
  };

  render() {
    const { exec, pageProperties } = this.props;
    return exec(pageProperties);
  }
}

export class Page extends React.Component {
  static propTypes = {
    url: T.string.isRequired,
    pageProperties: T.object,
  };

  render() {
    const { component, pageProperties } = this.props;
    return React.createElement(component, pageProperties);
  }
}

export class _UrlSwitch extends React.Component {
  static propTypes = {
    children: T.oneOfType([T.arrayOf(T.element), T.object]),
    currentPage: T.object.isRequired,
  };

  render() {
    const { children, currentPage } = this.props;
    const pages = Array.isArray(children) ? children : [children];

    let resultPage = null;

    for (let page of pages) {
      const { url } = page.props;

      const reg = pathToRegex(url);
      const result = reg.exec(currentPage.url);

      if (result) {
        resultPage = page;
        break;
      }
    }

    if (resultPage) {
      return React.cloneElement(resultPage, { pageProperties: currentPage });
    }

    return false;
  }
}

const selector = createSelector(
  state => state.platform.currentPage,
  currentPage => ({ currentPage })
);

export const UrlSwitch = connect(selector)(_UrlSwitch);