/* Copyright (C) 2019, 2020 Monomax Software Pty Ltd
 *
 * This file is part of Dnote.
 *
 * Dnote is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Dnote is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Dnote.  If not, see <https://www.gnu.org/licenses/>.
 */

/* eslint-disable no-restricted-globals, func-names, no-var, prefer-template */

self.addEventListener('install', function(event) {
  var offlineRequest = new Request('static/offline.html');

  event.waitUntil(
    fetch(offlineRequest).then(function(response) {
      return caches.open('offline').then(function(cache) {
        console.log('cached offline page', response.url);
        return cache.put(offlineRequest, response);
      });
    })
  );
});

self.addEventListener('fetch', function(event) {
  var request = event.request;
  if (request.method === 'GET') {
    event.respondWith(
      fetch(request).catch(function(error) {
        console.error(
          'onfetch Failed. Serving cached offline fallback ' + error
        );
        return caches.open('offline').then(function(cache) {
          return cache.match('offline.html');
        });
      })
    );
  }
});