Merge pull request #1128 from SubhamB2003/main

Added PWA

public/manifest.json

@@ -1,15 +1,32 @@
 {
-    "short_name": "React App",
-    "name": "Create React App Sample",
+    "theme_color": "#f69435",
+    "background_color": "#f69435",
+    "display": "standalone",
+    "scope": "/",
+    "start_url": "/",
+    "name": "Umatter",
+    "short_name": "umatter",
+    "description": "UMatter is a one and all platform to help people quit bad habits by providing them with personalized sessions and one-to-one consultations with professionals.",
     "icons": [
         {
-            "src": "favicon.ico",
-            "sizes": "64x64 32x32 24x24 16x16",
-            "type": "image/x-icon"
+            "src": "/icon-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/icon-256x256.png",
+            "sizes": "256x256",
+            "type": "image/png"
+        },
+        {
+            "src": "/icon-384x384.png",
+            "sizes": "384x384",
+            "type": "image/png"
+        },
+        {
+            "src": "/icon-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
         }
-    ],
-    "start_url": ".",
-    "display": "standalone",
-    "theme_color": "#000000",
-    "background_color": "#ffffff"
+    ]
 }

src/index.js

@@ -1,12 +1,15 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
-import './index.css';
 import App from './App';
-
+import './index.css';
+import * as serviceWorkerRegistration from './serviceWorkerRegistration';
 
 const root = ReactDOM.createRoot(document.getElementById('root'));
 root.render(
   <React.StrictMode>
     <App />
   </React.StrictMode>
-);
+);
+
+// Register the service worker
+serviceWorkerRegistration.register();

src/service-worker.js

@@ -0,0 +1,72 @@
+/* eslint-disable no-restricted-globals */
+
+// This service worker can be customized!
+// See https://developers.google.com/web/tools/workbox/modules
+// for the list of available Workbox modules, or add any other
+// code you'd like.
+// You can also remove this file if you'd prefer not to use a
+// service worker, and the Workbox build step will be skipped.
+
+import { clientsClaim } from 'workbox-core';
+import { ExpirationPlugin } from 'workbox-expiration';
+import { createHandlerBoundToURL, precacheAndRoute } from 'workbox-precaching';
+import { registerRoute } from 'workbox-routing';
+import { StaleWhileRevalidate } from 'workbox-strategies';
+
+clientsClaim();
+
+// Precache all of the assets generated by your build process.
+// Their URLs are injected into the manifest variable below.
+// This variable must be present somewhere in your service worker file,
+// even if you decide not to use precaching. See https://cra.link/PWA
+precacheAndRoute(self.__WB_MANIFEST);
+
+// Set up App Shell-style routing, so that all navigation requests
+// are fulfilled with your index.html shell. Learn more at
+// https://developers.google.com/web/fundamentals/architecture/app-shell
+const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$');
+registerRoute(
+    // Return false to exempt requests from being fulfilled by index.html.
+    ({ request, url }) => {
+        // If this isn't a navigation, skip.
+        if (request.mode !== 'navigate') {
+            return false;
+        } // If this is a URL that starts with /_, skip.
+
+        if (url.pathname.startsWith('/_')) {
+            return false;
+        } // If this looks like a URL for a resource, because it contains // a file extension, skip.
+
+        if (url.pathname.match(fileExtensionRegexp)) {
+            return false;
+        } // Return true to signal that we want to use the handler.
+
+        return true;
+    },
+    createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html')
+);
+
+// An example runtime caching route for requests that aren't handled by the
+// precache, in this case same-origin .png requests like those from in public/
+registerRoute(
+    // Add in any other file extensions or routing criteria as needed.
+    ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'), // Customize this strategy as needed, e.g., by changing to CacheFirst.
+    new StaleWhileRevalidate({
+        cacheName: 'images',
+        plugins: [
+            // Ensure that once this runtime cache reaches a maximum size the
+            // least-recently used images are removed.
+            new ExpirationPlugin({ maxEntries: 50 }),
+        ],
+    })
+);
+
+// This allows the web app to trigger skipWaiting via
+// registration.waiting.postMessage({type: 'SKIP_WAITING'})
+self.addEventListener('message', (event) => {
+    if (event.data && event.data.type === 'SKIP_WAITING') {
+        self.skipWaiting();
+    }
+});
+
+// Any other custom service worker logic can go here.

src/serviceWorkerRegistration.js

@@ -0,0 +1,137 @@
+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// 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 subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read https://cra.link/PWA
+
+const isLocalhost = Boolean(
+    window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.0/8 are considered localhost for IPv4.
+    window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/)
+);
+
+export function register(config) {
+    if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+        // The URL constructor is available in all browsers that support SW.
+        const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
+        if (publicUrl.origin !== window.location.origin) {
+            // Our service worker won't work if PUBLIC_URL is on a different origin
+            // from what our page is served on. This might happen if a CDN is used to
+            // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+            return;
+        }
+
+        window.addEventListener('load', () => {
+            const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+            if (isLocalhost) {
+                // This is running on localhost. Let's check if a service worker still exists or not.
+                checkValidServiceWorker(swUrl, config);
+
+                // 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://cra.link/PWA'
+                    );
+                });
+            } else {
+                // Is not localhost. Just register service worker
+                registerValidSW(swUrl, config);
+            }
+        });
+    }
+}
+
+function registerValidSW(swUrl, config) {
+    navigator.serviceWorker
+        .register(swUrl)
+        .then((registration) => {
+            registration.onupdatefound = () => {
+                const installingWorker = registration.installing;
+                if (installingWorker == null) {
+                    return;
+                }
+                installingWorker.onstatechange = () => {
+                    if (installingWorker.state === 'installed') {
+                        if (navigator.serviceWorker.controller) {
+                            // At this point, the updated precached content has been fetched,
+                            // but the previous service worker will still serve the older
+                            // content until all client tabs are closed.
+                            console.log(
+                                'New content is available and will be used when all ' +
+                                'tabs for this page are closed. See https://cra.link/PWA.'
+                            );
+
+                            // Execute callback
+                            if (config && config.onUpdate) {
+                                config.onUpdate(registration);
+                            }
+                        } 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.');
+
+                            // Execute callback
+                            if (config && config.onSuccess) {
+                                config.onSuccess(registration);
+                            }
+                        }
+                    }
+                };
+            };
+        })
+        .catch((error) => {
+            console.error('Error during service worker registration:', error);
+        });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+    // Check if the service worker can be found. If it can't reload the page.
+    fetch(swUrl, {
+        headers: { 'Service-Worker': 'script' },
+    })
+        .then((response) => {
+            // Ensure service worker exists, and that we really are getting a JS file.
+            const contentType = response.headers.get('content-type');
+            if (
+                response.status === 404 ||
+                (contentType != null && contentType.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, config);
+            }
+        })
+        .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();
+            })
+            .catch((error) => {
+                console.error(error.message);
+            });
+    }
+}