service-worker.js

const CACHE_NAME = "loopchii-stream-v5";
const CORE_ASSETS = [
  "./",
  "./index.html",
  "./manifest.webmanifest",
  "./openapi.stream.json",
  "./contributing.md",
  "./StreamLen_processors.html",
  "./assets/loopchii.svg",
  "./data/system/catalog.json",
  "./data/system/contracts.json",
  "./data/system/critical-spine.json",
  "./data/system/data-engineering.json",
  "./data/system/frontend-state.json",
  "./data/system/runtime.json",
];

self.addEventListener("install", (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => cache.addAll(CORE_ASSETS)).then(() => self.skipWaiting())
  );
});

self.addEventListener("activate", (event) => {
  event.waitUntil(
    caches.keys().then((keys) =>
      Promise.all(keys.filter((key) => key !== CACHE_NAME).map((key) => caches.delete(key)))
    ).then(() => self.clients.claim())
  );
});

self.addEventListener("fetch", (event) => {
  if (event.request.method !== "GET") return;
  const url = new URL(event.request.url);

  if (url.origin === self.location.origin && (url.pathname.startsWith("/data/") || url.pathname.endsWith(".json"))) {
    event.respondWith(
      fetch(event.request)
        .then((response) => {
          const clone = response.clone();
          caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
          return response;
        })
        .catch(() => caches.match(event.request))
    );
    return;
  }

  if (url.origin === self.location.origin) {
    event.respondWith(
      caches.match(event.request).then((cached) => cached || fetch(event.request))
    );
  }
});