Release v2.0.0 with dual-nail control and hardened safety

piNail2/static/sw.js

@@ -0,0 +1,53 @@
+const CACHE_NAME = 'pinail2-cache-v1';
+const APP_SHELL = [
+  '/',
+  '/static/style.css',
+  '/static/app.js',
+  '/static/img/pi_favicon.png',
+  '/static/img/pinail_logo.svg',
+  '/static/manifest.webmanifest'
+];
+
+self.addEventListener('install', function(event) {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then(function(cache) {
+      return cache.addAll(APP_SHELL);
+    })
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', function(event) {
+  event.waitUntil(
+    caches.keys().then(function(keys) {
+      return Promise.all(
+        keys
+          .filter(function(key) { return key !== CACHE_NAME; })
+          .map(function(key) { return caches.delete(key); })
+      );
+    })
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', function(event) {
+  if (event.request.method !== 'GET') {
+    return;
+  }
+
+  event.respondWith(
+    fetch(event.request)
+      .then(function(response) {
+        const cloned = response.clone();
+        caches.open(CACHE_NAME).then(function(cache) {
+          cache.put(event.request, cloned);
+        });
+        return response;
+      })
+      .catch(function() {
+        return caches.match(event.request).then(function(cached) {
+          return cached || caches.match('/');
+        });
+      })
+  );
+});