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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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"canvaskit/canvaskit.js": "43fa9e17039a625450b6aba93baf521e",
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"canvaskit/profiling/canvaskit.js": "f3bfccc993a1e0bfdd3440af60d99df4",
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"canvaskit/profiling/canvaskit.wasm": "a9610cf39260f60fbe7524a785c66101",
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"canvaskit/canvaskit.wasm": "04ed3c745ff1dee16504be01f9623498",
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"main.dart.js": "61754a901cc48bc501a7c145d08639b5",
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"version.json": "edac6610d63f93aebfb1c09a76230248",
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"manifest.json": "c58884a2d51c23985850658029a90226",
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"icons/Icon-512.png": "70dd4c7d62910514def11f21e23d99f8",
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"icons/Icon-192.png": "8afa706053b186edf013b6c9880872f9",
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"icons/favicon.png": "fa7fde306a35e196516bf8b1d6100f14",
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"assets/NOTICES": "57acdf72b543bf647caed8c82ab5f10a",
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"assets/AssetManifest.json": "530ce7513a29f7e0e810e7b74f70931f",
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"assets/FontManifest.json": "a6a35a39ab693849dcde3aba2d4304a7",
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"assets/assets/images/simple_dash_large.png": "c3100434238b1fe0f6b8e6d074ccd80e",
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"assets/assets/images/simple_dash_medium.png": "4e2fd9dee5fbd150653f06a83be3accf",
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"assets/assets/images/simple_dash_small.png": "b3f2ec92db7be8297f529f94d8e38136",
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"assets/assets/images/shuffle_icon.png": "32ebb4a7c6f9b07157a57f537f254619",
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"assets/assets/fonts/GoogleSans-BoldItalic.ttf": "aebc8fe5e393970fa3d468524e64b670",
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"assets/assets/fonts/GoogleSans-Regular.ttf": "51134713ade7b1f137e06ce395d39d40",
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"assets/assets/fonts/GoogleSans-Italic.ttf": "b08c7421b2d5350ea3003c8f38932601",
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"assets/assets/fonts/GoogleSans-Bold.ttf": "c0370e8a74992bab73461f8348e3b369",
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"assets/fonts/MaterialIcons-Regular.otf": "4e6447691c9509f7acdbf8a931a85ca1",
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"index.html": "6b36f8e6b9aee755dbe56a898e51a1a2",
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"/": "6b36f8e6b9aee755dbe56a898e51a1a2",
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"favicon.png": "fa7fde306a35e196516bf8b1d6100f14"
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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, {'cache': 'reload'})));
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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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// 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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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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// 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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// 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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