mobilizon/src/service-worker.ts

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import { registerRoute } from "workbox-routing";
import {
NetworkFirst,
StaleWhileRevalidate,
CacheFirst,
} from "workbox-strategies";
// Used for filtering matches based on status code, header, or both
import { CacheableResponsePlugin } from "workbox-cacheable-response";
// Used to limit entries in cache, remove entries after a certain period of time
import { ExpirationPlugin } from "workbox-expiration";
import { precacheAndRoute } from "workbox-precaching";
/// <reference lib="WebWorker" />
// export empty type because of tsc --isolatedModules flag
export type {};
declare const self: ServiceWorkerGlobalScope;
// Use with precache injection
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore
// eslint-disable-next-line no-underscore-dangle
precacheAndRoute(self.__WB_MANIFEST);
registerRoute(
// Check to see if the request is a navigation to a new page
({ request }) => request.mode === "navigate",
// Use a Network First caching strategy
new NetworkFirst({
// Put all cached files in a cache named 'pages'
cacheName: "pages",
plugins: [
// Ensure that only requests that result in a 200 status are cached
new CacheableResponsePlugin({
statuses: [200],
}),
],
})
);
// Cache CSS, JS, and Web Worker requests with a Stale While Revalidate strategy
registerRoute(
// Check to see if the request's destination is style for stylesheets, script for JavaScript, font, or worker for web worker
({ request }) =>
request.destination === "style" ||
request.destination === "script" ||
request.destination === "font" ||
request.destination === "worker",
// Use a Stale While Revalidate caching strategy
new StaleWhileRevalidate({
// Put all cached files in a cache named 'assets'
cacheName: "assets",
plugins: [
// Ensure that only requests that result in a 200 status are cached
new CacheableResponsePlugin({
statuses: [200],
}),
],
})
);
// Cache images with a Cache First strategy
registerRoute(
// Check to see if the request's destination is style for an image
({ request }) => request.destination === "image",
// Use a Cache First caching strategy
new CacheFirst({
// Put all cached files in a cache named 'images'
cacheName: "images",
plugins: [
// Ensure that only requests that result in a 200 status are cached
new CacheableResponsePlugin({
statuses: [200],
}),
// Don't cache more than 50 items, and expire them after 30 days
new ExpirationPlugin({
maxEntries: 50,
maxAgeSeconds: 60 * 60 * 24 * 30, // 30 Days
}),
],
})
);
async function isClientFocused(): Promise<boolean> {
const windowClients = await self.clients.matchAll({
type: "window",
includeUncontrolled: true,
});
let clientIsFocused = false;
for (let i = 0; i < windowClients.length; i++) {
const windowClient = windowClients[i] as WindowClient;
if (windowClient.focused) {
clientIsFocused = true;
break;
}
}
return clientIsFocused;
}
self.addEventListener("push", async (event: PushEvent) => {
if (!event.data) return;
const payload = event.data.json();
console.debug("received push", payload);
const options = {
body: payload.body,
icon: "/img/icons/android-chrome-512x512.png",
badge: "/img/icons/badge-128x128.png",
timestamp: new Date(payload.timestamp).getTime(),
lang: payload.locale,
data: {
dateOfArrival: Date.now(),
url: payload.url,
},
};
event.waitUntil(
(async () => {
if (await isClientFocused()) {
// No need to show a notification, client already focused
return;
}
self.registration.showNotification(payload.title, options);
})()
);
});
self.addEventListener("notificationclick", function (event: NotificationEvent) {
const url = event.notification.data.url;
event.notification.close();
// This looks to see if the current is already open and
// focuses if it is
event.waitUntil(
(async () => {
const clientList = await self.clients.matchAll({
type: "window",
includeUncontrolled: true,
});
for (let i = 0; i < clientList.length; i++) {
const client = clientList[i] as WindowClient;
if (client.url == url && "focus" in client) {
return client.focus();
}
}
if (self.clients.openWindow) {
return self.clients.openWindow(url);
}
})()
);
});
self.addEventListener("message", (event: ExtendableMessageEvent) => {
const replyPort = event.ports[0];
const message = event.data;
if (replyPort && message && message.type === "skip-waiting") {
console.debug("doing skip waiting");
event.waitUntil(
self.skipWaiting().then(
() => replyPort.postMessage({ error: null }),
(error) => replyPort.postMessage({ error })
)
);
}
});