monitor-dashboard/server.ts

import 'zone.js/node';

import {APP_BASE_HREF} from '@angular/common';
import {CommonEngine} from '@angular/ssr';
import * as express from 'express';
import {existsSync} from 'node:fs';
import {join} from 'node:path';
import {AppServerModule} from './src/app/app.server.module';
import {REQUEST, RESPONSE} from "./src/app/openaireLibrary/utils/tokens";

var bodyParser = require('body-parser');
var jsonParser = bodyParser.json();
import {properties} from "./src/environments/environment";
import axios, {AxiosHeaders} from "axios";
import {CacheIndicators} from "./src/app/openaireLibrary/monitor-admin/utils/cache-indicators/cache-indicators";
import {UserManagementService} from "./src/app/openaireLibrary/services/user-management.service";
import {Session, User} from "./src/app/openaireLibrary/login/utils/helper.class";
import {Stakeholder} from "./src/app/openaireLibrary/monitor/entities/stakeholder";

// The Express app is exported so that it can be used by serverless Functions.
export function app(): express.Express {
  const server = express();
  const distFolder = join(process.cwd(), 'dist/monitor-dashboard/browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html'))
      ? join(distFolder, 'index.original.html')
      : join(distFolder, 'index.html');
  let cacheIndicators: CacheIndicators = new CacheIndicators();

  const commonEngine = new CommonEngine();

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

  // Example Express Rest API endpoints
  // server.get('/api/**', (req, res) => { });
  // Serve static files from /browser
  server.post('/cache/:alias', jsonParser, async (req, res) => {
    await checkPermissions(req, res, (stakeholder, user) => {
      if (cacheIndicators.completed(stakeholder._id)) {
        res.send({
          id: stakeholder._id,
          report: cacheIndicators.createReport(stakeholder._id, cacheIndicators.stakeholderToCacheItems(stakeholder), stakeholder.name, user.email)
        });
      } else {
        res.status(409).send('There is another active caching process for this stakeholder');
      }
    });
  });

  server.get('/cache/:alias', async (req, res) => {
    await checkPermissions(req, res, stakeholder => {
      if (cacheIndicators.exists(stakeholder._id)) {
        res.send({
          id: stakeholder._id,
          report: cacheIndicators.getReport(stakeholder._id)
        });
      } else {
        res.status(404).send('There is not an active caching process for this stakeholder');
      }
    });
  });

  async function checkPermissions(req, res, access: (stakeholder, user) => void) {
    let headers: AxiosHeaders = new AxiosHeaders();
    headers.set('Cookie', req.headers.cookie);
    let userinfoRes = (await axios.get<any>(UserManagementService.userInfoUrl(), {
      withCredentials: true,
      headers: headers
    }).catch(error => {
      return error.response;
    }));
    if (userinfoRes.status === 200) {
      let user = new User(userinfoRes.data);
      let stakeholderRes = (await axios.get<Stakeholder>(properties.monitorServiceAPIURL + 'stakeholder/' + encodeURIComponent(req.params.alias), {
        withCredentials: true,
        headers: headers
      }).catch(error => {
        return error.response;
      }));
      if (stakeholderRes.status === 200) {
        let stakeholder = stakeholderRes.data;
        if (Session.isPortalAdministrator(user) || Session.isCurator(stakeholder.type, user)) {
          access(stakeholder, user);
        } else {
          res.status(403).send('You are forbidden to access this resource');
        }
      } else {
        res.status(stakeholderRes.status).send(stakeholderRes.statusText);
      }
    } else {
      res.status(userinfoRes.status).send(userinfoRes.data.message);
    }
  }

  server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));

  // All regular routes use the Angular engine
  server.get('*', (req, res, next) => {
    const {protocol, originalUrl, baseUrl, headers} = req;

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

  return server;
}

function run(): void {
  const port = process.env['PORT'] || 4000;

  // Start up the Node server
  const server = app();
  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${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();
}