PWA support attempt 1 #20

webassets/service-worker.js

@@ -0,0 +1,42 @@
+const CACHE_NAME = 'Spothole';
+const CACHE_URLS = [
+  'index.html',
+  './',
+  'apidocs',
+  'apidocs/openapi.yml',
+  'about',
+  'css/style.css',
+  'js/code.js',
+  'img/logo.png',
+  'img/favicon.ico',
+  'img/icon-32.png',
+  'img/icon-192.png',
+  'img/icon-512.png',
+  'fa/css/fontawesome.min.css',
+  'fa/css/solid.min.css',
+  'fa/webfonts/fa-solid-900.ttf',
+  'fa/webfonts/fa-solid-900.woff2'
+];
+
+self.addEventListener('fetch', (event) => {
+  // Is this an asset we can cache?
+  const url = new URL(event.request.url);
+  const isCacheableRequest = CACHE_URLS.includes(url.pathname);
+
+  if (isCacheableRequest) {
+    // Open the cache
+    event.respondWith(caches.open(CACHE_NAME).then((cache) => {
+      // Go to the network first, cacheing the response
+      return fetch(event.request.url).then((fetchedResponse) => {
+        cache.put(event.request, fetchedResponse.clone());
+
+        return fetchedResponse;
+      }).catch(() => {
+        // If the network is unavailable, get from cache.
+        return cache.match(event.request.url);
+      });
+    }));
+  } else {
+    // Not a cacheable request, must be a call to the API, so no cache involved just go to the network
+  }
+});