wisemapping-frontend/packages/webapp/src/app.tsx

import React, { ReactElement, Suspense } from 'react';
import { IntlProvider } from 'react-intl';
import { Route, Switch, Redirect, BrowserRouter as Router } from 'react-router-dom';
import ForgotPasswordSuccessPage from './components/forgot-password-success-page';
import RegistationPage from './components/registration-page';
import LoginPage from './components/login-page';
import store from './redux/store';
import { ForgotPasswordPage } from './components/forgot-password-page';
import { Provider } from 'react-redux';
import { QueryClient, QueryClientProvider } from 'react-query';
import { theme } from './theme';
import AppI18n, { Locales } from './classes/app-i18n';
import CssBaseline from '@mui/material/CssBaseline';
import { ThemeProvider, Theme, StyledEngineProvider } from '@mui/material/styles';
import ReactGA from 'react-ga4';
import AppConfig from './classes/app-config';
import withSessionExpirationHandling from './components/HOCs/withSessionExpirationHandling';

const EditorPage = React.lazy(() => import('./components/editor-page'));
const RegistrationSuccessPage = React.lazy(() => import('./components/registration-success-page'));
const MapsPage = React.lazy(() => import('./components/maps-page'));

declare module '@mui/styles/defaultTheme' {
  // eslint-disable-next-line @typescript-eslint/no-empty-interface
  interface DefaultTheme extends Theme {}
}

// Google Analytics Initialization.
ReactGA.initialize([
  {
    trackingId: AppConfig.getGoogleAnalyticsAccount(),
  },
]);

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      refetchIntervalInBackground: false,
      staleTime: 5 * 1000 * 60, // 10 minutes
    },
  },
});

const App = (): ReactElement => {
  const locale = AppI18n.getDefaultLocale();
  const EnhacedEditorPage = withSessionExpirationHandling(EditorPage);

  return locale.message ? (
    <Provider store={store}>
      <QueryClientProvider client={queryClient}>
        <IntlProvider
          locale={locale.code}
          defaultLocale={Locales.EN.code}
          messages={locale.message as Record<string, string>}
        >
          <StyledEngineProvider injectFirst>
            <ThemeProvider theme={theme}>
              <CssBaseline />
              <Router>
                <Switch>
                  <Route exact path="/">
                    <Redirect to="/c/login" />
                  </Route>
                  <Route path="/c/login" component={LoginPage} />
                  <Route path="/c/registration" component={RegistationPage} />
                  <Route path="/c/registration-success" component={RegistrationSuccessPage} />
                  <Route path="/c/forgot-password" component={ForgotPasswordPage} />
                  <Route path="/c/forgot-password-success" component={ForgotPasswordSuccessPage} />
                  <Route exact path="/c/maps/">
                    <Suspense fallback={<div></div>}>
                      <MapsPage />
                    </Suspense>
                  </Route>
                  <Route exact path="/c/maps/:id/edit">
                    <Suspense fallback={<div></div>}>
                      <EnhacedEditorPage isTryMode={false} />
                    </Suspense>
                  </Route>
                  <Route exact path="/c/maps/:id/try">
                    <Suspense fallback={<div></div>}>
                      <EnhacedEditorPage isTryMode={true} />
                    </Suspense>
                  </Route>
                </Switch>
              </Router>
            </ThemeProvider>
          </StyledEngineProvider>
        </IntlProvider>
      </QueryClientProvider>
    </Provider>
  ) : (
    <div>Loading ... </div>
  );
};

export default App;