// we'll version our cache (and learn how to delete caches in
// some other post)
let cacheName = 'v1.1::static';

const pageCached = [
          '/',
		  '/index.html',
		  '/manifest.json',
          '/sw.js',
          'data/contacts.json',
          '/tools.ico',
		  '/css/mobiparc.css',
          '/js/mobiparc.js',
          '/js/jquery-3.2.1.min.js',
          '/js/jquery-ui.min.js',
          '/js/handlebars.min.js',
          '/img/tools_512.png',
          '/img/tools_128.png',
          '/img/tools.svg',
];

self.addEventListener('install', e => {
  // once the SW is installed, go ahead and fetch the resources
  // to make this work offline
  e.waitUntil(
    caches.open(cacheName).then(cache => {
        return cache.addAll(pageCached).then(() => self.skipWaiting());
    })
  );
});

self.addEventListener('activate', function (e) {
    //console.log('[ServiceWorker] Activate');
    e.waitUntil(
        caches.keys().then(keyList => {
            return Promise.all(keyList.map(key => {
                if (key !== cacheName) {
                    console.log('[ServiceWorker] Removing old cache', key);
                    return caches.delete(key);
                }
            }));
        })
    );
    return self.clients.claim();
});


// when the browser fetches a url, either response with
// the cached object or go ahead and fetch the actual url
self.addEventListener('fetch', event => {
  event.respondWith(
    // ensure we check the *right* cache to match against
    caches.open(cacheName).then(cache => {
      return cache.match(event.request).then(res => {
        return res || fetch(event.request)
      });
    })
  );
});