workbox-cdn/workbox/workbox-offline-ga.dev.js

this.workbox = this.workbox || {};
this.workbox.googleAnalytics = (function (exports, Plugin_mjs, cacheNames_mjs, getFriendlyURL_mjs, logger_mjs, Route_mjs, Router_mjs, NetworkFirst_mjs, NetworkOnly_mjs) {
  'use strict';

  try {
    self['workbox:google-analytics:4.3.0'] && _();
  } catch (e) {} // eslint-disable-line

  /*
    Copyright 2018 Google LLC

    Use of this source code is governed by an MIT-style
    license that can be found in the LICENSE file or at
    https://opensource.org/licenses/MIT.
  */
  const QUEUE_NAME = 'workbox-google-analytics';
  const MAX_RETENTION_TIME = 60 * 48; // Two days in minutes

  const GOOGLE_ANALYTICS_HOST = 'www.google-analytics.com';
  const GTM_HOST = 'www.googletagmanager.com';
  const ANALYTICS_JS_PATH = '/analytics.js';
  const GTAG_JS_PATH = '/gtag/js';
  const GTM_JS_PATH = '/gtm.js';
  // endpoints. Most of the time the default path (/collect) is used, but
  // occasionally an experimental endpoint is used when testing new features,
  // (e.g. /r/collect or /j/collect)

  const COLLECT_PATHS_REGEX = /^\/(\w+\/)?collect/;

  /*
    Copyright 2018 Google LLC

    Use of this source code is governed by an MIT-style
    license that can be found in the LICENSE file or at
    https://opensource.org/licenses/MIT.
  */
  /**
   * Creates the requestWillDequeue callback to be used with the background
   * sync queue plugin. The callback takes the failed request and adds the
   * `qt` param based on the current time, as well as applies any other
   * user-defined hit modifications.
   *
   * @param {Object} config See workbox.googleAnalytics.initialize.
   * @return {Function} The requestWillDequeu callback function.
   *
   * @private
   */

  const createOnSyncCallback = config => {
    return async ({
      queue
    }) => {
      let entry;

      while (entry = await queue.shiftRequest()) {
        const {
          request,
          timestamp
        } = entry;
        const url = new URL(request.url);

        try {
          // Measurement protocol requests can set their payload parameters in
          // either the URL query string (for GET requests) or the POST body.
          const params = request.method === 'POST' ? new URLSearchParams((await request.clone().text())) : url.searchParams; // Calculate the qt param, accounting for the fact that an existing
          // qt param may be present and should be updated rather than replaced.

          const originalHitTime = timestamp - (Number(params.get('qt')) || 0);
          const queueTime = Date.now() - originalHitTime; // Set the qt param prior to applying hitFilter or parameterOverrides.

          params.set('qt', queueTime); // Apply `paramterOverrideds`, if set.

          if (config.parameterOverrides) {
            for (const param of Object.keys(config.parameterOverrides)) {
              const value = config.parameterOverrides[param];
              params.set(param, value);
            }
          } // Apply `hitFilter`, if set.


          if (typeof config.hitFilter === 'function') {
            config.hitFilter.call(null, params);
          } // Retry the fetch. Ignore URL search params from the URL as they're
          // now in the post body.


          await fetch(new Request(url.origin + url.pathname, {
            body: params.toString(),
            method: 'POST',
            mode: 'cors',
            credentials: 'omit',
            headers: {
              'Content-Type': 'text/plain'
            }
          }));

          {
            logger_mjs.logger.log(`Request for '${getFriendlyURL_mjs.getFriendlyURL(url.href)}'` + `has been replayed`);
          }
        } catch (err) {
          await queue.unshiftRequest(entry);

          {
            logger_mjs.logger.log(`Request for '${getFriendlyURL_mjs.getFriendlyURL(url.href)}'` + `failed to replay, putting it back in the queue.`);
          }

          throw err;
        }
      }

      {
        logger_mjs.logger.log(`All Google Analytics request successfully replayed; ` + `the queue is now empty!`);
      }
    };
  };
  /**
   * Creates GET and POST routes to catch failed Measurement Protocol hits.
   *
   * @param {Plugin} queuePlugin
   * @return {Array<Route>} The created routes.
   *
   * @private
   */


  const createCollectRoutes = queuePlugin => {
    const match = ({
      url
    }) => url.hostname === GOOGLE_ANALYTICS_HOST && COLLECT_PATHS_REGEX.test(url.pathname);

    const handler = new NetworkOnly_mjs.NetworkOnly({
      plugins: [queuePlugin]
    });
    return [new Route_mjs.Route(match, handler, 'GET'), new Route_mjs.Route(match, handler, 'POST')];
  };
  /**
   * Creates a route with a network first strategy for the analytics.js script.
   *
   * @param {string} cacheName
   * @return {Route} The created route.
   *
   * @private
   */


  const createAnalyticsJsRoute = cacheName => {
    const match = ({
      url
    }) => url.hostname === GOOGLE_ANALYTICS_HOST && url.pathname === ANALYTICS_JS_PATH;

    const handler = new NetworkFirst_mjs.NetworkFirst({
      cacheName
    });
    return new Route_mjs.Route(match, handler, 'GET');
  };
  /**
   * Creates a route with a network first strategy for the gtag.js script.
   *
   * @param {string} cacheName
   * @return {Route} The created route.
   *
   * @private
   */


  const createGtagJsRoute = cacheName => {
    const match = ({
      url
    }) => url.hostname === GTM_HOST && url.pathname === GTAG_JS_PATH;

    const handler = new NetworkFirst_mjs.NetworkFirst({
      cacheName
    });
    return new Route_mjs.Route(match, handler, 'GET');
  };
  /**
   * Creates a route with a network first strategy for the gtm.js script.
   *
   * @param {string} cacheName
   * @return {Route} The created route.
   *
   * @private
   */


  const createGtmJsRoute = cacheName => {
    const match = ({
      url
    }) => url.hostname === GTM_HOST && url.pathname === GTM_JS_PATH;

    const handler = new NetworkFirst_mjs.NetworkFirst({
      cacheName
    });
    return new Route_mjs.Route(match, handler, 'GET');
  };
  /**
   * @param {Object=} [options]
   * @param {Object} [options.cacheName] The cache name to store and retrieve
   *     analytics.js. Defaults to the cache names provided by `workbox-core`.
   * @param {Object} [options.parameterOverrides]
   *     [Measurement Protocol parameters](https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters),
   *     expressed as key/value pairs, to be added to replayed Google Analytics
   *     requests. This can be used to, e.g., set a custom dimension indicating
   *     that the request was replayed.
   * @param {Function} [options.hitFilter] A function that allows you to modify
   *     the hit parameters prior to replaying
   *     the hit. The function is invoked with the original hit's URLSearchParams
   *     object as its only argument.
   *
   * @memberof workbox.googleAnalytics
   */


  const initialize = (options = {}) => {
    const cacheName = cacheNames_mjs.cacheNames.getGoogleAnalyticsName(options.cacheName);
    const queuePlugin = new Plugin_mjs.Plugin(QUEUE_NAME, {
      maxRetentionTime: MAX_RETENTION_TIME,
      onSync: createOnSyncCallback(options)
    });
    const routes = [createGtmJsRoute(cacheName), createAnalyticsJsRoute(cacheName), createGtagJsRoute(cacheName), ...createCollectRoutes(queuePlugin)];
    const router = new Router_mjs.Router();

    for (const route of routes) {
      router.registerRoute(route);
    }

    router.addFetchListener();
  };

  /*
    Copyright 2018 Google LLC

    Use of this source code is governed by an MIT-style
    license that can be found in the LICENSE file or at
    https://opensource.org/licenses/MIT.
  */

  exports.initialize = initialize;

  return exports;

}({}, workbox.backgroundSync, workbox.core._private, workbox.core._private, workbox.core._private, workbox.routing, workbox.routing, workbox.strategies, workbox.strategies));