From 4be93da5c23f4e6193383b77b6e41af5bd2a0a60 Mon Sep 17 00:00:00 2001
From: Sebastian Sdorra <sebastian.sdorra@cloudogu.com>
Date: Thu, 17 Oct 2019 09:15:35 +0200
Subject: [PATCH] remove unused service worker

---
 scm-ui/ui-webapp/src/index.js                 |   3 -
 scm-ui/ui-webapp/src/registerServiceWorker.js | 120 ------------------
 2 files changed, 123 deletions(-)
 delete mode 100644 scm-ui/ui-webapp/src/registerServiceWorker.js

diff --git a/scm-ui/ui-webapp/src/index.js b/scm-ui/ui-webapp/src/index.js
index 24c5550ae3..cb90b58f09 100644
--- a/scm-ui/ui-webapp/src/index.js
+++ b/scm-ui/ui-webapp/src/index.js
@@ -2,7 +2,6 @@
 import React from "react";
 import ReactDOM from "react-dom";
 import Index from "./containers/Index";
-import registerServiceWorker from "./registerServiceWorker";
 
 import { I18nextProvider } from "react-i18next";
 import i18n from "./i18n";
@@ -31,5 +30,3 @@ ReactDOM.render(
   </Provider>,
   root
 );
-
-registerServiceWorker();
diff --git a/scm-ui/ui-webapp/src/registerServiceWorker.js b/scm-ui/ui-webapp/src/registerServiceWorker.js
deleted file mode 100644
index 26ac9c966c..0000000000
--- a/scm-ui/ui-webapp/src/registerServiceWorker.js
+++ /dev/null
@@ -1,120 +0,0 @@
-/* eslint-disable no-console */
-// In production, we register a service worker to serve assets from local cache.
-
-// This lets the app load faster on subsequent visits in production, and gives
-// it offline capabilities. However, it also means that developers (and users)
-// will only see deployed updates on the "N+1" visit to a page, since previously
-// cached resources are updated in the background.
-
-// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
-// This link also includes instructions on opting out of this behavior.
-
-const isLocalhost = Boolean(
-  window.location.hostname === "localhost" ||
-    // [::1] is the IPv6 localhost address.
-    window.location.hostname === "[::1]" ||
-    // 127.0.0.1/8 is considered localhost for IPv4.
-    window.location.hostname.match(
-      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
-    )
-);
-
-export default function register() {
-  if (process.env.NODE_ENV === "production" && "serviceWorker" in navigator) {
-    // The URL constructor is available in all browsers that support SW.
-    const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
-    if (publicUrl.origin !== window.location.origin) {
-      // Our service worker won't work if PUBLIC_URL is on a different origin
-      // from what our page is served on. This might happen if a CDN is used to
-      // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
-      return;
-    }
-
-    window.addEventListener("load", () => {
-      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
-
-      if (isLocalhost) {
-        // This is running on localhost. Lets check if a service worker still exists or not.
-        checkValidServiceWorker(swUrl);
-
-        // Add some additional logging to localhost, pointing developers to the
-        // service worker/PWA documentation.
-        navigator.serviceWorker.ready.then(() => {
-          console.log(
-            "This web app is being served cache-first by a service " +
-              "worker. To learn more, visit https://goo.gl/SC7cgQ"
-          );
-        });
-      } else {
-        // Is not local host. Just register service worker
-        registerValidSW(swUrl);
-      }
-    });
-  }
-}
-
-function registerValidSW(swUrl) {
-  navigator.serviceWorker
-    .register(swUrl)
-    .then(registration => {
-      registration.onupdatefound = () => {
-        const installingWorker = registration.installing;
-        installingWorker.onstatechange = () => {
-          if (installingWorker.state === "installed") {
-            if (navigator.serviceWorker.controller) {
-              // At this point, the old content will have been purged and
-              // the fresh content will have been added to the cache.
-              // It's the perfect time to display a "New content is
-              // available; please refresh." message in your web app.
-              console.log("New content is available; please refresh.");
-            } else {
-              // At this point, everything has been precached.
-              // It's the perfect time to display a
-              // "Content is cached for offline use." message.
-              console.log("Content is cached for offline use.");
-            }
-          }
-        };
-      };
-    })
-    .catch(error => {
-      console.error("Error during service worker registration:", error);
-    });
-}
-
-function checkValidServiceWorker(swUrl) {
-  // Check if the service worker can be found. If it can't reload the page.
-  fetch(swUrl)
-    .then(response => {
-      // Ensure service worker exists, and that we really are getting a JS file.
-      if (
-        response.status === 404 ||
-        response.headers.get("content-type").indexOf("javascript") === -1
-      ) {
-        // No service worker found. Probably a different app. Reload the page.
-        navigator.serviceWorker.ready.then(registration => {
-          registration.unregister().then(() => {
-            window.location.reload();
-          });
-        });
-      } else {
-        // Service worker found. Proceed as normal.
-        registerValidSW(swUrl);
-      }
-    })
-    .catch(() => {
-      console.log(
-        "No internet connection found. App is running in offline mode."
-      );
-    });
-}
-
-export function unregister() {
-  if ("serviceWorker" in navigator) {
-    navigator.serviceWorker.ready.then(registration => {
-      registration.unregister();
-    });
-  }
-}
-
-/* eslint-enable no-console */