utils.js

const {inspect, types} = require('util');
const opener = require('opener');

const MONTHS = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

exports.createAssetsFilter = createAssetsFilter;

function createAssetsFilter(excludePatterns) {
  const excludeFunctions = (Array.isArray(excludePatterns) ? excludePatterns : [excludePatterns])
    .filter(Boolean)
    .map(pattern => {
      if (typeof pattern === 'string') {
        pattern = new RegExp(pattern, 'u');
      }

      if (types.isRegExp(pattern)) {
        return (asset) => pattern.test(asset);
      }

      if (typeof pattern !== 'function') {
        throw new TypeError(
          `Pattern should be either string, RegExp or a function, but "${inspect(pattern, {depth: 0})}" got.`
        );
      }

      return pattern;
    });

  if (excludeFunctions.length) {
    return (asset) => excludeFunctions.every(fn => fn(asset) !== true);
  } else {
    return () => true;
  }
}

/**
 * @desc get string of current time
 * format: dd/MMM HH:mm
 * */
exports.defaultTitle = function () {
  const time = new Date();
  const year = time.getFullYear();
  const month = MONTHS[time.getMonth()];
  const day = time.getDate();
  const hour = `0${time.getHours()}`.slice(-2);
  const minute = `0${time.getMinutes()}`.slice(-2);

  const currentTime = `${day} ${month} ${year} at ${hour}:${minute}`;

  return `${process.env.npm_package_name || 'Webpack Bundle Analyzer'} [${currentTime}]`;
};

exports.defaultAnalyzerUrl = function (options) {
  const {listenHost, boundAddress} = options;
  return `http://${listenHost}:${boundAddress.port}`;
};

/**
 * Calls opener on a URI, but silently try / catches it.
 */
exports.open = function (uri, logger) {
  try {
    opener(uri);
  } catch (err) {
    logger.debug(`Opener failed to open "${uri}":\n${err}`);
  }
};