mempool/frontend/server.ts

import 'zone.js';
import './src/resources/config.js';

import { CommonEngine } from '@angular/ssr';
import * as express from 'express';
import * as fs from 'fs';
import * as path from 'path';
import * as domino from 'domino';

import { join } from 'path';
import { AppServerModule } from './src/main.server';
import { APP_BASE_HREF } from '@angular/common';
import { existsSync } from 'fs';

import { ResizeObserver } from './shims';

const commonEngine = new CommonEngine();

const template = fs.readFileSync(path.join(process.cwd(), 'dist/mempool/browser/en-US/', 'index.html')).toString();
const win = domino.createWindow(template);

// @ts-ignore
win.__env = global.__env;

// @ts-ignore
win.matchMedia = (media) => {
  return {
    media,
    matches: true,
  };
};

// @ts-ignore
win.setTimeout = (fn) => { fn(); };
win.document.body.scrollTo = (() => {});
win['ResizeObserver'] = ResizeObserver;
// @ts-ignore
global['window'] = win;
// @ts-ignore
global['document'] = win.document;
// @ts-ignore
global['history'] = { state: { } };
// @ts-ignore
Object.defineProperty(global, 'navigator', {
  value: win.navigator,
  writable: true
});

global['localStorage'] = {
  getItem: () => '',
  setItem: () => {},
  removeItem: () => {},
  clear: () => {},
  length: 0,
  key: () => '',
};

// The Express app is exported so that it can be used by serverless Functions.
export function app(locale: string): express.Express {
  const server = express();
  const distFolder = join(process.cwd(), `dist/mempool/browser/${locale}`);
  const indexHtml = join(distFolder, 'index.html');

  server.set('view engine', 'html');
  server.set('views', distFolder);

  // static file handler so we send HTTP 404 to nginx
  server.get('/**.(css|js|json|ico|webmanifest|png|jpg|jpeg|svg|mp4)*', express.static(distFolder, { maxAge: '1y', fallthrough: false }));
  // handle page routes
  server.get('*', (req, res, next) => {
    const { protocol, originalUrl, baseUrl, headers } = req;

    commonEngine
      .render({
        bootstrap: AppServerModule,
        documentFilePath: indexHtml,
        url: `${protocol}://${headers.host}${originalUrl}`,
        publicPath: distFolder,
        providers: [{ provide: APP_BASE_HREF, useValue: baseUrl }],
      })
      .then((html) => res.send(html))
      .catch((err) => next(err));
  });

  return server;
}


// only used for development mode
function run(): void {
  const port = process.env.PORT || 4000;

  // Start up the Node server
  const server = app('en-US');
  server.listen(port, () => {
    console.log(`Node Express server listening on port ${port}`);
  });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
const moduleFilename = mainModule && mainModule.filename || '';
if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
  run();
}