acidBros/sw.js at main · acidsound/acidBros · GitHub

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const CACHE_NAME = 'acidbros-v152';
const ASSETS = [
    './',
    './index.html',
    './css/base.css',
    './css/icons.css',
    './css/layout.css',
    './css/components.css',
    './css/machines.css',
    './css/overlays.css',
    './js/main.js',
    './js/ui/RotaryKnob.js',
    './js/audio/AudioEngine.js',
    './js/audio/ClockProcessor.js',
    './js/audio/TB303.js',
    './js/audio/TR909.js',
    './js/data/Data.js',
    './js/data/FileManager.js',
    './js/data/BinaryFormatEncoder.js',
    './js/data/BinaryFormatDecoder.js',
    './js/ui/UI.js',
    './js/ui/DrumSynthUI.js',
    './js/audio/tr909/DrumVoice.js',
    './js/audio/tr909/UnifiedSynth.js',
    './js/ui/Oscilloscope.js',
    './js/midi/MidiManager.js',
    './manifest.json',
    './assets/favicon.png',
    './assets/DSEG7Classic-Bold.woff2',
    './assets/samples/tr909/hh01.wav',
    './assets/samples/tr909/oh01.wav',
    './assets/samples/tr909/cr01.wav',
    './assets/samples/tr909/rd01.wav',
    './assets/icons/add.svg',
    './assets/icons/settings.svg',
    './assets/icons/bd.svg',
    './assets/icons/sd.svg',
    './assets/icons/lt.svg',
    './assets/icons/mt.svg',
    './assets/icons/ht.svg',
    './assets/icons/rs.svg',
    './assets/icons/cp.svg',
    './assets/icons/ch.svg',
    './assets/icons/oh.svg',
    './assets/icons/cr.svg',
    './assets/icons/rd.svg',
    './assets/icons/folder.svg',
    './assets/icons/play.svg',
    './assets/icons/stop.svg',
    './assets/icons/dice.svg',
    './assets/icons/trash.svg',
    './assets/icons/share.svg',
    './assets/icons/cog.svg',
    './assets/icons/coffee.svg',
    './assets/icons/shuffle.svg',
    './assets/icons/copy.svg',
    './assets/icons/paste.svg',
    './assets/icons/file-new.svg',
    './assets/icons/file-save.svg',
    './assets/icons/file-import.svg',
    './assets/icons/file-export.svg',
    './assets/icons/file-delete-all.svg',
    './assets/icons/close.svg',
    './assets/icons/refresh.svg',
    './assets/icons/unlocked.svg',
    './assets/icons/locked.svg',
    './assets/icons/saw.svg',
    './assets/icons/sq.svg',
    './assets/icons/pattern.svg',
    './assets/icons/song.svg',
    './assets/icons/edit.svg'
];

self.addEventListener('install', (e) => {
    self.skipWaiting();
    e.waitUntil(
        caches.open(CACHE_NAME).then((cache) => {
            return cache.addAll(ASSETS);
        })
    );
});

const isSameOriginGetRequest = (request) => {
    if (!request || request.method !== 'GET') return false;
    const url = new URL(request.url);
    return url.origin === self.location.origin;
};

const cachePutIfOk = async (request, response) => {
    if (!response || !response.ok) return;
    const cache = await caches.open(CACHE_NAME);
    await cache.put(request, response.clone());
};

const networkFirst = async (request) => {
    try {
        const fresh = await fetch(request);
        await cachePutIfOk(request, fresh);
        return fresh;
    } catch (err) {
        const cache = await caches.open(CACHE_NAME);
        const cached = await cache.match(request);
        if (cached) return cached;

        if (request.mode === 'navigate') {
            const fallback = await cache.match('./index.html');
            if (fallback) return fallback;
        }
        throw err;
    }
};

const staleWhileRevalidate = async (request, event) => {
    const cache = await caches.open(CACHE_NAME);
    const cached = await cache.match(request);

    const updatePromise = fetch(request)
        .then(async (fresh) => {
            await cachePutIfOk(request, fresh);
            return fresh;
        })
        .catch(() => null);

    if (cached) {
        event.waitUntil(updatePromise);
        return cached;
    }

    const fresh = await updatePromise;
    if (fresh) return fresh;

    if (request.mode === 'navigate') {
        const fallback = await cache.match('./index.html');
        if (fallback) return fallback;
    }

    return Response.error();
};

self.addEventListener('fetch', (e) => {
    if (!isSameOriginGetRequest(e.request)) return;

    const destination = e.request.destination;
    const shouldUseNetworkFirst =
        e.request.mode === 'navigate' ||
        destination === 'style' ||
        destination === 'script' ||
        destination === 'worker' ||
        destination === 'audio';

    if (shouldUseNetworkFirst) {
        e.respondWith(networkFirst(e.request));
        return;
    }

    e.respondWith(staleWhileRevalidate(e.request, e));
});

self.addEventListener('activate', (e) => {
    e.waitUntil(
        caches.keys().then((keyList) => {
            return Promise.all(
                keyList.map((key) => {
                    if (key !== CACHE_NAME) {
                        return caches.delete(key);
                    }
                })
            );
        }).then(() => self.clients.claim())
    );
});