text: /*
   * @license
   * Your First PWA Codelab (https://g.co/codelabs/pwa)
   * Copyright 2019 Google Inc. All rights reserved.
   *
   * 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
   */
  'use strict';
  
  // CODELAB: Update cache names any time any of the cached files change.
  // const CACHE_NAME = 'static-cache-v1';
  // CODELAB: Update cache names any time any of the cached files change.
  const CACHE_NAME = 'static-cache-v2';
  const DATA_CACHE_NAME = 'data-cache-v1';
  
  // CODELAB: Add list of files to cache here.
  // const FILES_TO_CACHE = [
  //   '/offline.html',
  // ];
  // CODELAB: Add list of files to cache here.
  const FILES_TO_CACHE = [
    'index.html',
    'scripts/app.js',
    'scripts/install.js',
    'scripts/luxon-1.11.4.js',
    'styles/inline.css',
    'images/add.svg',
    'images/clear-day.svg',
    'images/clear-night.svg',
    'images/cloudy.svg',
    'images/fog.svg',
    'images/hail.svg',
    'images/install.svg',
    'images/partly-cloudy-day.svg',
    'images/partly-cloudy-night.svg',
    'images/rain.svg',
    'images/refresh.svg',
    'images/sleet.svg',
    'images/snow.svg',
    'images/thunderstorm.svg',
    'images/tornado.svg',
    'images/wind.svg',
  ];
  
  self.addEventListener('install', (evt) => {
    console.log('[ServiceWorker] Install');
    // CODELAB: Precache static resources here.
    evt.waitUntil(
      caches.open(CACHE_NAME).then((cache) => {
        console.log('[ServiceWorker] Pre-caching offline page');
        return cache.addAll(FILES_TO_CACHE);
      })
    );
    self.skipWaiting();
  });
  
  self.addEventListener('activate', (evt) => {
    console.log('[ServiceWorker] Activate');
    // CODELAB: Remove previous cached data from disk.
    evt.waitUntil(
      caches.keys().then((keyList) => {
        return Promise.all(keyList.map((key) => {
          // if (key !== CACHE_NAME) {
          if (key !== CACHE_NAME && key !== DATA_CACHE_NAME) {
            console.log('[ServiceWorker] Removing old cache', key);
            return caches.delete(key);
          }
        }));
      })
    );
    self.clients.claim();
  });
  
  self.addEventListener('fetch', (evt) => {
    console.log('[ServiceWorker] Fetch', evt.request.url);
    // CODELAB: Add fetch event handler here.
    // CODELAB: Add fetch event handler here.
    if (evt.request.url.includes('/forecast/')) {
      console.log('[Service Worker] Fetch (data)', evt.request.url);
      evt.respondWith(
          caches.open(DATA_CACHE_NAME).then((cache) => {
            return fetch(evt.request)
                .then((response) => {
                  // If the response was good, clone it and store it in the cache.
                  if (response.status === 200) {
                    cache.put(evt.request.url, response.clone());
                  }
                  return response;
                }).catch((err) => {
                  // Network request failed, try to get it from the cache.
                  return cache.match(evt.request);
                });
          }));
      return;
    }
    evt.respondWith(
        caches.open(CACHE_NAME).then((cache) => {
          return cache.match(evt.request)
              .then((response) => {
                return response || fetch(evt.request);
              });
        })
    );
    if (evt.request.mode !== 'navigate') {
      // Not a page navigation, bail.
      return;
    }
    evt.respondWith(
      fetch(evt.request)
      .catch(() => {
        return caches.open(CACHE_NAME).then((cache) => {
          return cache.match('offline.html');
          // return cache.match('/offline.html');
        });
      })
    );
  });
  