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import { freeStorage, storageFreeable } from '../storage/modifier';
import './web_push_notifications';
function openSystemCache() {
return caches.open('mastodon-system');
}
function openWebCache() {
return caches.open('mastodon-web');
}
function fetchRoot() {
return fetch('/', { credentials: 'include', redirect: 'manual' });
}
const firefox = navigator.userAgent.match(/Firefox\/(\d+)/);
const invalidOnlyIfCached = firefox && firefox[1] < 60;
// Cause a new version of a registered Service Worker to replace an existing one
// that is already installed, and replace the currently active worker on open pages.
self.addEventListener('install', function(event) {
event.waitUntil(Promise.all([openWebCache(), fetchRoot()]).then(([cache, root]) => cache.put('/', root)));
});
self.addEventListener('activate', function(event) {
event.waitUntil(self.clients.claim());
});
self.addEventListener('fetch', function(event) {
const url = new URL(event.request.url);
if (url.pathname.startsWith('/web/')) {
const asyncResponse = fetchRoot();
const asyncCache = openWebCache();
event.respondWith(asyncResponse.then(
response => asyncCache.then(cache => cache.put('/', response.clone()))
.then(() => response),
() => asyncCache.then(cache => cache.match('/'))));
} else if (url.pathname === '/auth/sign_out') {
const asyncResponse = fetch(event.request);
const asyncCache = openWebCache();
event.respondWith(asyncResponse.then(response => {
if (response.ok || response.type === 'opaqueredirect') {
return Promise.all([
asyncCache.then(cache => cache.delete('/')),
indexedDB.deleteDatabase('mastodon'),
]).then(() => response);
}
return response;
}));
} else if (storageFreeable && (ATTACHMENT_HOST ? url.host === ATTACHMENT_HOST : url.pathname.startsWith('/system/'))) {
event.respondWith(openSystemCache().then(cache => {
return cache.match(event.request.url).then(cached => {
if (cached === undefined) {
const asyncResponse = invalidOnlyIfCached && event.request.cache === 'only-if-cached' ?
fetch(event.request, { cache: 'no-cache' }) : fetch(event.request);
return asyncResponse.then(response => {
if (response.ok) {
const put = cache.put(event.request.url, response.clone());
put.catch(() => freeStorage());
return put.then(() => {
freeStorage();
return response;
});
}
return response;
});
}
return cached;
});
}));
}
});
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