const CACHE_NAME = 'v1'
const urlsToCache = ['/', '/index.html', '/stl.zip']

self.addEventListener('install', event => {
    event.waitUntil(
        caches.open(CACHE_NAME).then(cache => {
            return cache.addAll(urlsToCache)
        })
    )
})

// self.addEventListener('fetch', (event) => {
// 	event.respondWith(
// 		caches.match(event.request).then((response) => {
// 			if (response) {
// 				return response;
// 			}
// 			return fetch(event.request).then((response) => {
// 				if (!response || response.status !== 200 || response.type !== 'basic') {
// 					return response;
// 				}
// 				var responseToCache = response.clone();
// 				caches.open(CACHE_NAME).then((cache) => {
// 					cache.put(event.request, responseToCache);
// 				});
// 				return response;
// 			});
// 		})
// 	);
// });

self.addEventListener('activate', event => {
    var cacheWhitelist = ['v1']
    event.waitUntil(
        caches.keys().then(cacheNames => {
            return Promise.all(
                cacheNames.map(cacheName => {
                    if (cacheWhitelist.indexOf(cacheName) === -1) {
                        return caches.delete(cacheName)
                    }
                })
            )
        })
    )
})