Initial financial project import

public/sw.js

@@ -0,0 +1,60 @@
+const CACHE_NAME = 'financial-static-v1';
+const STATIC_ASSETS = [
+  '/offline.html',
+  '/assets/vendor/bootstrap.min.css',
+  '/assets/vendor/bootstrap.bundle.min.js',
+  '/assets/vendor/chart.umd.js',
+  '/assets/app.css',
+  '/assets/pwa.js',
+  '/favicon.png?v=2',
+  '/manifest.webmanifest'
+];
+
+self.addEventListener('install', event => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then(cache => cache.addAll(STATIC_ASSETS))
+      .catch(() => undefined)
+  );
+  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))
+    ))
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', event => {
+  const request = event.request;
+
+  if (request.method !== 'GET') {
+    return;
+  }
+
+  const url = new URL(request.url);
+
+  if (url.origin !== location.origin) {
+    return;
+  }
+
+  if (url.pathname.startsWith('/api/')) {
+    return;
+  }
+
+  if (url.pathname.startsWith('/assets/vendor/') || url.pathname === '/assets/app.css' || url.pathname === '/assets/pwa.js' || url.pathname === '/manifest.webmanifest' || url.pathname === '/favicon.png') {
+    event.respondWith(
+      caches.match(request).then(cached => cached || fetch(request))
+    );
+    return;
+  }
+
+  if (request.mode === 'navigate') {
+    event.respondWith(
+      fetch(request).catch(() => caches.match('/offline.html'))
+    );
+  }
+});