text: /**
   * Copyright 2021  The AMP HTML Authors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  const PageExperienceGuide = require('../lib/PageExperienceGuide');
  
  const pageExperienceGuide = new PageExperienceGuide();
  
  /**
   * HTTP Cloud Function.
   *
   * @param {Object} req Cloud Function request context.
   *                     More info: https://expressjs.com/en/api.html#req
   * @param {Object} res Cloud Function response context.
   *                     More info: https://expressjs.com/en/api.html#res
   */
  exports.checkFonts = async (req, res) => {
    const url = req.query.url;
    if (!url) {
      res.status(400).send('Missing url parameter');
      return;
    }
    try {
      new URL(url);
    } catch (e) {
      res.status(400).send(`invalid URL "${url}"`);
      return;
    }
    const result = await pageExperienceGuide.analyze(url);
    res.header('Content-Type', 'application/json');
    res.send(JSON.stringify(result, null, 2));
    return;
  };
  