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feat: add SW stub
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@x1unix
x1unix committed Jul 15, 2024
1 parent cd28922 commit d2f2614
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Showing 3 changed files with 19 additions and 270 deletions.
19 changes: 19 additions & 0 deletions web/public/service-worker.js
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// Self-destructible service worker stub to self-destruct old broken v1 SW

self.addEventListener('install', function(e) {
self.skipWaiting();
})

self.addEventListener('activate', function(e) {
self.registration.unregister()
.then(function () {
return self.clients.matchAll();
})
.then(function (clients) {
clients.forEach(client => {
if (client instanceof WindowClient) {
client.navigate(client.url)
}
})
});
})
107 changes: 0 additions & 107 deletions web/src/service-worker.ts
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163 changes: 0 additions & 163 deletions web/src/serviceWorkerRegistration.ts
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/// <reference types="node" />
// 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
import { trimSuffix } from './utils/path'

const BASE_URL = trimSuffix(import.meta.env.BASE_URL, '/')

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}$/),
)

interface Config {
onSuccess?: (registration: ServiceWorkerRegistration) => void
onUpdate?: (registration: ServiceWorkerRegistration) => void
}

export function register(config?: Config) {
if (import.meta.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
// The URL constructor is available in all browsers that support SW.
const publicUrl = new URL(BASE_URL, window.location.href)
if (publicUrl.origin !== window.location.origin) {
// Our service worker won't work if BASE_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 = `${BASE_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.
// eslint-disable-next-line @typescript-eslint/no-floating-promises
navigator.serviceWorker.ready.then((reg) => {
console.log(
'This web app is being served cache-first by a service ' +
'worker. To learn more, visit https://cra.link/PWA',
)
reg.update().catch((err) => {
console.error('Failed to update service worker: ', err)
})
})
} else {
// Is not localhost. Just register service worker
registerValidSW(swUrl, config)
}
})
}
}

/**
* Manually registers service worker
*
* @param config
*/
export function manualRegister(config?: Config) {
if (import.meta.env.DEV) {
return
}
if (!('serviceWorker' in navigator)) {
return
}

const publicUrl = new URL(BASE_URL, window.location.href)
if (publicUrl.origin !== window.location.origin) {
return
}

const swUrl = `${BASE_URL}/service-worker.js`
if (isLocalhost) {
checkValidServiceWorker(swUrl, config)
return
}

registerValidSW(swUrl, config)
}

function registerValidSW(swUrl: string, config?: 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?.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?.onSuccess) {
config.onSuccess(registration)
}
}
}
}
}
})
.catch((error) => {
console.error('Error during service worker registration:', error)
})
}

function checkValidServiceWorker(swUrl: string, config?: 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.includes('javascript'))) {
// No service worker found. Probably a different app. Reload the page.
// eslint-disable-next-line @typescript-eslint/no-floating-promises
navigator.serviceWorker.ready.then((registration) => {
// eslint-disable-next-line @typescript-eslint/no-floating-promises
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) {
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