bff.js

const fs = require('fs');
const sh = require('shelljs');
const crypto = require('crypto');
const { allow } = require('./package.json');
const bffData = require('./build/bffData');

const { pmTech: allowedPmTech } = allow;
const delay = 1000;
const runtime = {
  pm: [''],
};

if (process.env.PM_TECH) {
  sh.exec('mkdir -p public');

  Object.keys(runtime).forEach((key) => {
    if (runtime[key][0]) {
      const fileBuffer = fs.readFileSync(runtime[key][0]);
      const hashSum = crypto.createHash('sha1');
      const ext = runtime[key][0]
        .split('/')
        .pop()
        .split('.')
        .pop();

      hashSum.update(fileBuffer);

      const hex = hashSum.digest('hex');

      runtime[key].push(`_${hex}.${ext}`);

      sh.exec(`cp ${runtime[key][0]} public/${runtime[key][1]}`);
    }
  });
}

const prefetch = async () => {
  sh.exec('mkdir -p bff-data');

  await bffData();

  let pmt = '';

  if (process.env.PM_TECH_RT) {
    sh.config.silent = true;
    pmt = sh.exec('cat build/pmt.js').stdout.split('\n').shift();
    sh.config.silent = false;

    sh.exec('mkdir -p public');

    Object.keys(runtime).forEach((key) => {
      if (runtime[key][0]) {
        const fileBuffer = fs.readFileSync(runtime[key][0]);
        const hashSum = crypto.createHash('sha1');
        const ext = runtime[key][0]
          .split('/')
          .pop()
          .split('.')
          .pop();

        hashSum.update(fileBuffer);

        const hex = hashSum.digest('hex');

        runtime[key].push(`_${hex}.${ext}`);

        setTimeout(() => {
          sh.exec(`cp ${runtime[key][0]} public/${runtime[key][1]}`);
        }, delay);
      }
    });
  }

  const UACode = 'G-CX7P9K6W67';
  const GTMCode = 'GTM-M42M5N';
  const googleTagManager = `(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','${GTMCode}');`;

  const script = (process.env.PM_TECH_RT
      && `
${pmt}
setTimeout(function(){
  var propertyName = 'postman-docs';
  if (window.pmt) {
    window.pmt('setScalp', [{
      property: propertyName
    }]);
    window.pmt('scalp', [
      'pm-analytics',
      'load',
      document.location.pathname
    ]);
    window.pmt('trackClicks');

    var dnt = (parseInt(navigator.doNotTrack) === 1 || parseInt(window.doNotTrack) === 1 || parseInt(navigator.msDoNotTrack) === 1 || navigator.doNotTrack === "yes");

    window.pmt('log', ['navigator.doNotTrack: ' + dnt]);

    if(!dnt) {
      ${googleTagManager}
      window.pmt('log', ['attached googletagmanager: ' + '${GTMCode}']);
      var d = 1000, int;
      var int = setInterval(function(){
        if (window.ga) {
          var sitename = document.location.hostname;
          window.dataLayer = window.dataLayer || [];
          function gtag(){dataLayer.push(arguments);}
          window.gtag = gtag;
          gtag('js', new Date());
          gtag('config', '${UACode}');
          window.pmt('ga', ['${UACode}', sitename]);
          window.pmt('log', ['initialized GA: ' + sitename + ' (' + '${UACode}' + ')']);
          window._iaq = window._iaq || {};
          clearInterval(int);
        }
      }, d);
    }
  }
}, 1000);
`)
|| `
  console.info('Postman OSS');
`;

  fs.writeFile('bff.json', JSON.stringify({ script }), (err) => {
    if (err) {
      throw err;
    }
  });
};

prefetch();