Moved serviceworker around

static/service-worker.js

@@ -0,0 +1,69 @@
+importScripts('/static/dist/lib/cache-polyfill.js');
+
+var CACHE_VERSION = 'app-v1';
+var CACHE_FILES = [
+    '/static/images/favicon.png',
+    '/static/css/style.css',
+    '/static/css/materialize.min.css',
+    'https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.min.css',
+    'https://fonts.googleapis.com/icon?family=Material+Icons',
+    'https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js',
+    'https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js',
+    '/static/dist/lib/materialize.min.js',
+    'https://cdn.socket.io/socket.io-1.4.5.js',
+    '/static/dist/lib/jquery.lazyload.js',
+    '/static/dist/lib/color-thief.js',
+    '/static/dist/main.min.js'
+];
+
+self.addEventListener('install', function (event) {
+    event.waitUntil(
+        caches.open(CACHE_VERSION)
+            .then(function (cache) {
+                console.log('Opened cache');
+                return cache.addAll(CACHE_FILES);
+            })
+    );
+});
+
+self.addEventListener('activate', function (event) {
+    event.waitUntil(
+        caches.keys().then(function(keys){
+            return Promise.all(keys.map(function(key, i){
+                if(key !== CACHE_VERSION){
+                    return caches.delete(keys[i]);
+                }
+            }))
+        })
+    )
+});
+
+self.addEventListener('fetch', function (event) {
+    console.log(event);
+    event.respondWith(
+        caches.match(event.request).then(function(res){
+            if(res){
+                return res;
+            }
+            requestBackend(event);
+        })
+    )
+});
+
+function requestBackend(event){
+    var url = event.request.clone();
+    return fetch(url).then(function(res){
+        //if not a valid response send the error
+        if(!res || res.status !== 200 || res.type !== 'basic'){
+            return res;
+        }
+
+        var response = res.clone();
+
+        caches.open(CACHE_VERSION).then(function(cache){
+            cache.put(event.request, response);
+        });
+
+        return res;
+    })
+}