fetchLighthouseMetrics.js

import { serializeObject } from './utils';

export default function fetchLighthouseMetrics(url) {
  try {
      // Api using example - 
      // https://developers.google.com/speed/docs/insights/v5/reference/pagespeedapi/runpagespeed?apix_params=%7B%22url%22%3A%22https%3A%2F%2Fwww.bookaway.com%2Froutes%2Fcroatia%2Fhvar-to-split%22%2C%22category%22%3A%5B%22BEST_PRACTICES%22%2C%22ACCESSIBILITY%22%2C%22SEO%22%2C%22PERFORMANCE%22%5D%2C%22strategy%22%3A%22MOBILE%22%7D#response
      const response = UrlFetchApp.fetch(`https://www.googleapis.com/pagespeedonline/v5/runPagespeed?url=${url}&strategy=${STRATEGY}&category=BEST_PRACTICES&category=ACCESSIBILITY&category=SEO&category=PERFORMANCE`);

      var data = JSON.parse(response.getContentText());
      
      var lighthouseMetrics = {
      seoScore: data.lighthouseResult.categories.seo?.score,
      accessibilityScore: data.lighthouseResult.categories.accessibility?.score,
      performanceScore: data.lighthouseResult.categories.performance?.score,
      bestPracticesScore: data.lighthouseResult.categories['best-practices']?.score
      };

      Logger.log(`For url ${url}, metrics: ${JSON.stringify(lighthouseMetrics)}`);

      return lighthouseMetrics;
  } catch (error) {
      Logger.log(`Error on fetchLighthouseMetrics: ${error.toString()} for ${url}`);
  }
}