/// <reference types="@sveltejs/kit" />
/// <reference no-default-lib="true"/>
/// <reference lib="esnext" />
/// <reference lib="webworker" />

// Because of this line, this service worker won't run in dev mode in Firefox.
// Only Safari, Edge, Chrome can run it at the moment, because only they
// support modules in service workers.
//
// That's okay! If you run `tools/run` with PILCROW_DEV unset, you will get the
// bundled version, and can work on it. Or just use Safari.
import { build, files, version } from '$service-worker';

// Create a unique cache name for this deployment
const CACHE = `cache-${version}`;

const ASSETS = [
	...build, // the app itself
	...files  // everything in `static`
];

self.addEventListener('install', (event) => {
	// Create a new cache and add all files to it
	async function addFilesToCache() {
		const cache = await caches.open(CACHE);
		await cache.addAll(ASSETS);
	}

	event.waitUntil(addFilesToCache());
});

self.addEventListener('activate', (event) => {
	// Remove previous cached data from disk
	async function deleteOldCaches() {
		for (const key of await caches.keys()) {
			if (key !== CACHE) await caches.delete(key);
		}
	}

	event.waitUntil(deleteOldCaches());
});