D-Net

import 'zone.js/dist/zone-node';

import { ngExpressEngine } from '@nguniversal/express-engine';

import * as express from 'express';

import * as compression from 'compression';

import { join } from 'path';

import { AppServerModule } from './src/main.server';

import { APP_BASE_HREF } from '@angular/common';

import { existsSync } from 'fs';

import * as prom from "prom-client";

import {routes} from "./routes";

import {REQUEST, RESPONSE} from "./src/app/openaireLibrary/utils/tokens";

// The Express app is exported so that it can be used by serverless Functions.

export function app() {

  const server = express();

  server.use(compression());

  const distFolder = join(process.cwd(), 'dist/explore/browser');

  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  const register = new prom.Registry();

  const responses = new prom.Counter({

    name: 'portal_http_responses_total',

    help: 'A counter for portal response codes for every existed or not existed pages.',

    labelNames: ['route', 'code'],

    registers: [register]

  });

  const histogram = new prom.Histogram({

    name: 'portal_http_request_duration_seconds',

    help: 'A Histogram for a portal. Providing information about page visits and load latency in seconds.',

    labelNames: ['route'],

    registers: [register],

    buckets: [0.1, 0.2, 0.5, 1, 2]

  });

  // Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)

  server.engine('html', ngExpressEngine({

    bootstrap: AppServerModule,

  }));

  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.get('*.*', express.static(distFolder, {

    maxAge: '1y'

  }));

  server.get('/metrics', (req, res) => {

    res.set('Content-Type', register.contentType);

    res.end(register.metrics());

  });

  // All regular routes use the Universal engine

  server.get('*', (req, res) => {

    if (routes.indexOf(req.path) !== -1) {

      const end = histogram.startTimer({route: req.path});

      res.render(indexHtml, {

          req, providers: [

            {

              provide: APP_BASE_HREF,

              useValue: req.baseUrl

            },

            {

              provide: REQUEST, useValue: (req)

            },

            {

              provide: RESPONSE, useValue: (res)

            }

          ]

        }

      );

      res.on('finish', function () {

        responses.inc({route: req.path, code: res.statusCode});

        end();

      });

    } else {

      res.render(indexHtml, {

          req, providers: [

            {

              provide: APP_BASE_HREF,

              useValue: req.baseUrl

            },

            {

              provide: REQUEST, useValue: (req)

            },

            {

              provide: RESPONSE, useValue: (res)

            }

          ]

        }

      );

      res.on('finish', function () {

        responses.inc({route: '**', code: res.statusCode});

      });

    }

  });

  return server;

}

function run() {

  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();

}

export * from './src/main.server';