simpleadmin-web/internal/web/assets/sw.js
Astra 17232bd5a2 Staff push notifications, and revalidate embedded assets
Notifications: staff turn them on per device from a new Notifications page,
pick each type (bans, gags, mutes and silences added or lifted, server down
and back up) and quiet hours. A watcher polls SimpleAdmin's tables, so in-game
penalties are sent too. Web Push with VAPID and RFC 8291 encryption in
internal/push, standard library only. Tables in sql/push.sql, created at
startup; the VAPID key is made on first start and kept in saw_settings.
Penalty notifications link to the public list searching for the player
(#bans?q=<steamid64>). The Android app delegates notifications (versionCode 3).

Caching: pages, scripts and styles are served with Cache-Control: no-cache
and an ETag, so a deploy shows up at once instead of after Cloudflare's
default 4-hour browser cache.
2026-10-03 13:49:40 +01:00

75 lines
2.9 KiB
JavaScript

// The service worker lets the site be installed as an app, and shows staff notifications. It caches
// nothing but the offline page: every request still goes to the network, so nobody sees stale bans
// or ranks.
const CACHE = "offline-v1";
const OFFLINE = "/static/offline.html";
self.addEventListener("install", (e) => {
e.waitUntil(caches.open(CACHE).then((c) => c.add(OFFLINE)).then(() => self.skipWaiting()));
});
self.addEventListener("activate", (e) => {
e.waitUntil(
caches.keys()
.then((keys) => Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k))))
.then(() => self.clients.claim()),
);
});
// Only page loads get the offline page; API calls fail as they always have, and the pages say so.
self.addEventListener("fetch", (e) => {
if (e.request.mode !== "navigate") return;
e.respondWith(fetch(e.request).catch(() => caches.match(OFFLINE)));
});
// Staff notifications (internal/web/notify.go). The panel sends title, body, icon, tag, url and
// actions; a notification with the same tag replaces the last one quietly.
self.addEventListener("push", (e) => {
let d = {};
try { d = e.data ? e.data.json() : {}; } catch { d = { body: e.data.text() }; }
e.waitUntil(self.registration.showNotification(d.title || "zio.sh", {
body: d.body || "",
icon: d.icon || "/static/icon-192.png",
badge: "/static/badge-96.png",
tag: d.tag,
timestamp: d.timestamp,
actions: d.actions || [],
data: { url: d.url || "/" },
}));
});
// Tapping the notification or its "View player" button opens its page, in an open window if
// there is one.
self.addEventListener("notificationclick", (e) => {
e.notification.close();
const url = new URL(e.notification.data?.url || "/", self.location.origin).href;
e.waitUntil((async () => {
const wins = await self.clients.matchAll({ type: "window", includeUncontrolled: true });
const win = wins.find((w) => new URL(w.url).origin === self.location.origin);
if (win) {
try {
await win.focus();
await win.navigate(url);
return;
} catch { /* not ours to navigate; open a new one */ }
}
await self.clients.openWindow(url);
})());
});
// Browsers sometimes replace a subscription. Hand the new one to the panel so notifications keep
// coming; this only works while the staff member's session cookie is still valid.
self.addEventListener("pushsubscriptionchange", (e) => {
e.waitUntil((async () => {
const opts = e.oldSubscription?.options;
const sub = e.newSubscription || (opts && await self.registration.pushManager.subscribe(opts));
if (!sub) return;
await fetch("/api/admin/notifications/subscribe", {
method: "POST",
credentials: "same-origin",
headers: { "Content-Type": "application/json", "X-Requested-With": "simpleadmin-web" },
body: JSON.stringify({ ...sub.toJSON(), userAgent: navigator.userAgent }),
});
})());
});