cinny/src/sw.ts

/// <reference lib="WebWorker" />
import { precacheAndRoute, cleanupOutdatedCaches } from 'workbox-precaching';

export type {};
declare const self: ServiceWorkerGlobalScope;

const DEFAULT_NOTIFICATION_ICON = '/icons/icon-192x192.png'; // Replace with your actual default icon path
const DEFAULT_NOTIFICATION_BADGE = '/icons/badge-72x72.png'; // Replace with your actual default badge icon path (for notification UI)

const pendingReplies = new Map();
let messageIdCounter = 0;
function sendAndWaitForReply(client: WindowClient, type: string, payload: object) {
  messageIdCounter += 1;
  const id = messageIdCounter;
  const promise = new Promise((resolve) => {
    pendingReplies.set(id, resolve);
  });
  client.postMessage({ type, id, payload });
  return promise;
}

self.addEventListener('message', (event) => {
  const { replyTo } = event.data;
  if (replyTo) {
    const resolve = pendingReplies.get(replyTo);
    if (resolve) {
      pendingReplies.delete(replyTo);
      resolve(event.data.payload);
    }
  }
});


function fetchConfig(token?: string): RequestInit | undefined {
  if (!token) return undefined;

  return {
    headers: {
      Authorization: `Bearer ${token}`,
    },
    cache: 'default',
  };
}

self.addEventListener('activate', (event: ExtendableEvent) => {
  event.waitUntil(
    (async () => {
      await self.clients.claim();
    })()
  );
});

self.addEventListener('install', (event: ExtendableEvent) => {
  event.waitUntil(self.skipWaiting());
});

self.addEventListener('fetch', (event: FetchEvent) => {
  const { url, method } = event.request;
  if (method !== 'GET') return;
  if (
    !url.includes('/_matrix/client/v1/media/download') &&
    !url.includes('/_matrix/client/v1/media/thumbnail')
  ) {
    return;
  }
  event.respondWith(
    (async (): Promise<Response> => {
      const client = await self.clients.get(event.clientId);
      let token: string | undefined;
      if (client) token = await askForAccessToken(client);

      return fetch(url, fetchConfig(token));
    })()
  );
});