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@@ -0,0 +1,193 @@
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+'use strict';
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+const MANIFEST = 'flutter-app-manifest';
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+const TEMP = 'flutter-temp-cache';
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+const CACHE_NAME = 'flutter-app-cache';
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+const RESOURCES = {
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+ "assets/AssetManifest.json": "bd8db864e073ad49798db635511a1982",
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+"assets/assets/cupra.png": "74e952f8024ce46147cd4d698e2c2061",
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+"assets/assets/salva.png": "eb241cb0dc6d90b633b86ccd608cca2a",
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+"assets/assets/zenn.png": "f29d892c25cd4932c5d186c0e42552c1",
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+"assets/FontManifest.json": "dc3d03800ccca4601324923c0b1d6d57",
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+"assets/fonts/MaterialIcons-Regular.otf": "1288c9e28052e028aba623321f7826ac",
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+"assets/NOTICES": "ea42367cad0dcbbba4af83f19286e30b",
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+"assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "6d342eb68f170c97609e9da345464e5e",
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+"favicon.png": "5dcef449791fa27946b3d35ad8803796",
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+"icons/Icon-192.png": "ac9a721a12bbc803b44f645561ecb1e1",
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+"icons/Icon-512.png": "96e752610906ba2a93c65f8abe1645f1",
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+"index.html": "17adf65551d1ed7c53f396f1587b96ed",
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+"/": "17adf65551d1ed7c53f396f1587b96ed",
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+"main.dart.js": "81d034ab6eec91e02f8582c958dd9451",
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+"manifest.json": "6118bf7e9fab0247d14bc12aed0d17b6",
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+"version.json": "43ec79f4801420dcc2ef0b9c81ed225b"
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+};
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+
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+// The application shell files that are downloaded before a service worker can
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+// start.
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+const CORE = [
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+ "/",
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+"main.dart.js",
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+"index.html",
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+"assets/NOTICES",
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+"assets/AssetManifest.json",
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+"assets/FontManifest.json"];
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+// During install, the TEMP cache is populated with the application shell files.
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+self.addEventListener("install", (event) => {
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+ self.skipWaiting();
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+ return event.waitUntil(
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+ caches.open(TEMP).then((cache) => {
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+ return cache.addAll(
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+ CORE.map((value) => new Request(value + '?revision=' + RESOURCES[value], {'cache': 'reload'})));
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+ })
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+ );
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+});
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+
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+// During activate, the cache is populated with the temp files downloaded in
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+// install. If this service worker is upgrading from one with a saved
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+// MANIFEST, then use this to retain unchanged resource files.
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+self.addEventListener("activate", function(event) {
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+ return event.waitUntil(async function() {
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+ try {
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+ var contentCache = await caches.open(CACHE_NAME);
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+ var tempCache = await caches.open(TEMP);
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+ var manifestCache = await caches.open(MANIFEST);
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+ var manifest = await manifestCache.match('manifest');
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+ // When there is no prior manifest, clear the entire cache.
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+ if (!manifest) {
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+ await caches.delete(CACHE_NAME);
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+ contentCache = await caches.open(CACHE_NAME);
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+ for (var request of await tempCache.keys()) {
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+ var response = await tempCache.match(request);
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+ await contentCache.put(request, response);
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+ }
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+ await caches.delete(TEMP);
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+ // Save the manifest to make future upgrades efficient.
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+ await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
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+ return;
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+ }
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+ var oldManifest = await manifest.json();
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+ var origin = self.location.origin;
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+ for (var request of await contentCache.keys()) {
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+ var key = request.url.substring(origin.length + 1);
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+ if (key == "") {
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+ key = "/";
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+ }
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+ // If a resource from the old manifest is not in the new cache, or if
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+ // the MD5 sum has changed, delete it. Otherwise the resource is left
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+ // in the cache and can be reused by the new service worker.
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+ if (!RESOURCES[key] || RESOURCES[key] != oldManifest[key]) {
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+ await contentCache.delete(request);
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+ }
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+ }
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+ // Populate the cache with the app shell TEMP files, potentially overwriting
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+ // cache files preserved above.
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+ for (var request of await tempCache.keys()) {
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+ var response = await tempCache.match(request);
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+ await contentCache.put(request, response);
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+ }
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+ await caches.delete(TEMP);
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+ // Save the manifest to make future upgrades efficient.
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+ await manifestCache.put('manifest', new Response(JSON.stringify(RESOURCES)));
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+ return;
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+ } catch (err) {
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+ // On an unhandled exception the state of the cache cannot be guaranteed.
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+ console.error('Failed to upgrade service worker: ' + err);
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+ await caches.delete(CACHE_NAME);
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+ await caches.delete(TEMP);
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+ await caches.delete(MANIFEST);
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+ }
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+ }());
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+});
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+
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+// The fetch handler redirects requests for RESOURCE files to the service
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+// worker cache.
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+self.addEventListener("fetch", (event) => {
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+ if (event.request.method !== 'GET') {
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+ return;
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+ }
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+ var origin = self.location.origin;
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+ var key = event.request.url.substring(origin.length + 1);
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+ // Redirect URLs to the index.html
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+ if (key.indexOf('?v=') != -1) {
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+ key = key.split('?v=')[0];
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+ }
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+ if (event.request.url == origin || event.request.url.startsWith(origin + '/#') || key == '') {
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+ key = '/';
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+ }
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+ // If the URL is not the RESOURCE list then return to signal that the
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+ // browser should take over.
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+ if (!RESOURCES[key]) {
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+ return;
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+ }
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+ // If the URL is the index.html, perform an online-first request.
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+ if (key == '/') {
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+ return onlineFirst(event);
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+ }
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+ event.respondWith(caches.open(CACHE_NAME)
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+ .then((cache) => {
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+ return cache.match(event.request).then((response) => {
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+ // Either respond with the cached resource, or perform a fetch and
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+ // lazily populate the cache.
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+ return response || fetch(event.request).then((response) => {
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+ cache.put(event.request, response.clone());
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+ return response;
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+ });
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+ })
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+ })
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+ );
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+});
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+
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+self.addEventListener('message', (event) => {
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+ // SkipWaiting can be used to immediately activate a waiting service worker.
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+ // This will also require a page refresh triggered by the main worker.
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+ if (event.data === 'skipWaiting') {
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+ self.skipWaiting();
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+ return;
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+ }
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+ if (event.data === 'downloadOffline') {
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+ downloadOffline();
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+ return;
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+ }
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+});
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+
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+// Download offline will check the RESOURCES for all files not in the cache
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+// and populate them.
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+async function downloadOffline() {
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+ var resources = [];
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+ var contentCache = await caches.open(CACHE_NAME);
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+ var currentContent = {};
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+ for (var request of await contentCache.keys()) {
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+ var key = request.url.substring(origin.length + 1);
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+ if (key == "") {
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+ key = "/";
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+ }
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+ currentContent[key] = true;
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+ }
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+ for (var resourceKey of Object.keys(RESOURCES)) {
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+ if (!currentContent[resourceKey]) {
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+ resources.push(resourceKey);
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+ }
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+ }
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+ return contentCache.addAll(resources);
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+}
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+
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+// Attempt to download the resource online before falling back to
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+// the offline cache.
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+function onlineFirst(event) {
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+ return event.respondWith(
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+ fetch(event.request).then((response) => {
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+ return caches.open(CACHE_NAME).then((cache) => {
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+ cache.put(event.request, response.clone());
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+ return response;
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+ });
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+ }).catch((error) => {
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+ return caches.open(CACHE_NAME).then((cache) => {
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+ return cache.match(event.request).then((response) => {
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+ if (response != null) {
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+ return response;
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+ }
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+ throw error;
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+ });
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+ });
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+ })
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+ );
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+}
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