54 lines
1.9 KiB
JavaScript
54 lines
1.9 KiB
JavaScript
// Thermograph service worker — push delivery only.
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//
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// Deliberately NO fetch/offline caching: the app already has an app-level
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// IndexedDB response cache (cache.js), and a caching service worker would fight
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// it. This worker exists purely so the app is installable (a registered SW is a
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// PWA prerequisite) and can receive Web Push while no tab is open.
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//
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// Served from {BASE}/sw.js, so its scope is {BASE}/ — it controls the whole app.
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self.addEventListener("install", () => {
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self.skipWaiting(); // activate this version immediately
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});
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self.addEventListener("activate", (event) => {
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event.waitUntil(self.clients.claim()); // take control of open pages at once
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});
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// A push arrived. The payload is the JSON we send from push.py:
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// { title, body, url, tag }.
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self.addEventListener("push", (event) => {
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let data = {};
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try {
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data = event.data ? event.data.json() : {};
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} catch (e) {
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data = { title: "Thermograph", body: event.data ? event.data.text() : "" };
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}
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const title = data.title || "Thermograph";
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const options = {
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body: data.body || "",
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icon: "logo-192.png?v=3",
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badge: "logo-192.png?v=3",
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tag: data.tag || "thermograph",
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data: { url: data.url || "./" },
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};
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event.waitUntil(self.registration.showNotification(title, options));
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});
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// Tapping a notification: focus an existing app tab if one is open, else open the
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// deep link the notification carried.
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self.addEventListener("notificationclick", (event) => {
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event.notification.close();
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const target = (event.notification.data && event.notification.data.url) || "./";
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event.waitUntil(
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self.clients.matchAll({ type: "window", includeUncontrolled: true }).then((clients) => {
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for (const client of clients) {
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if ("focus" in client) {
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client.navigate(target).catch(() => {});
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return client.focus();
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}
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}
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return self.clients.openWindow(target);
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})
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);
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});
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