app.js

/**
 * app.js
 *
 * This is the entry file for the application, only setup and boilerplate
 * code.
 */

// Needed for redux-saga es6 generator support
import 'core-js/stable';
import 'regenerator-runtime/runtime';

// Import all the third party stuff
import React from 'react';
import { createRoot } from 'react-dom/client';
import { Provider } from 'react-redux';
import { Router, browserHistory } from 'react-router';
import { syncHistoryWithStore } from 'react-router-redux';
import 'sanitize.css/sanitize.css';

// Import root app
import App from 'containers/App';

// Import selector for `syncHistoryWithStore`
import { makeSelectLocationState } from 'containers/App/selectors';

// Import Language Provider
import LanguageProvider from 'containers/LanguageProvider';

// Import ThemeProvider
import { Grommet } from 'grommet';
import theme from 'themes/theme-nz';

// Load the favicon, and the .htaccess file
/* eslint-disable import/no-unresolved, import/extensions */
import '!file-loader?name=[name].[ext]!./favicon.ico';
import '!file-loader?name=[name].[ext]!./favicon-16x16.png';
import '!file-loader?name=[name].[ext]!./favicon-32x32.png';
import '!file-loader?name=[name].[ext]!./android-chrome-192x192.png';
import '!file-loader?name=[name].[ext]!./android-chrome-256x256.png';
import '!file-loader?name=[name].[ext]!./mstile-150x150.png';
import '!file-loader?name=[name].[ext]!./apple-touch-icon.png';
import '!file-loader?name=[name].[ext]!./safari-pinned-tab.svg';
import 'file-loader?name=[name].[ext]!./.htaccess';
/* eslint-enable import/no-unresolved, import/extensions */

import configureStore from './store';

// Import i18n messages
import { translationMessages } from './i18n';

// Import root routes
import createRoutes from './routes';

// Create redux store with history
// this uses the singleton browserHistory provided by react-router
// Optionally, this could be changed to leverage a created history
// e.g. `const browserHistory = useRouterHistory(createBrowserHistory)();`
const initialState = {};
const store = configureStore(initialState, browserHistory);

// Sync history and store, as the react-router-redux reducer
// is under the non-default key ("routing"), selectLocationState
// must be provided for resolving how to retrieve the "route" in the state
const history = syncHistoryWithStore(browserHistory, store, {
  selectLocationState: makeSelectLocationState(),
});

// Set up the router, wrapping all Routes in the App component
const rootRoute = {
  component: App,
  childRoutes: createRoutes(store),
};

const container = document.getElementById('app');
const root = createRoot(container);
const render = (messages) => {
  root.render(
    <Provider store={store}>
      <LanguageProvider messages={messages}>
        <Grommet theme={theme}>
          <Router
            history={history}
            routes={rootRoute}
          />
        </Grommet>
      </LanguageProvider>
    </Provider>
  );
};

// Hot reloadable translation json files
if (module.hot) {
  // modules.hot.accept does not accept dynamic dependencies,
  // have to be constants at compile-time
  module.hot.accept('./i18n', () => {
    render(translationMessages);
  });
}

// Chunked polyfill for browsers without Intl support
/* eslint-disable import/extensions */
if (!window.Intl) {
  new Promise((resolve) => {
    resolve(import('intl'));
  })
    .then(() => Promise.all([import('intl/locale-data/jsonp/en.js')]))
    .then(() => render(translationMessages))
    .catch((err) => {
      throw err;
    });
} else {
  render(translationMessages);
}

// Install ServiceWorker and AppCache in the end since
// it's not most important operation and if main code fails,
// we do not want it installed
if (process.env.NODE_ENV === 'production') {
  const runtime = require('offline-plugin/runtime'); // eslint-disable-line global-require
  runtime.install({
    onUpdateReady: () => {
      // console.log('SW Event:', 'onUpdateReady');
      // Tells to new SW to take control immediately
      runtime.applyUpdate();
    },
  });
}