elk/plugins/pwa.client.ts

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import { useRegisterSW } from 'virtual:pwa-register/vue'
export default defineNuxtPlugin(() => {
const online = useOnline()
const registrationError = ref(false)
const swActivated = ref(false)
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const showInstallPrompt = ref(false)
// https://thomashunter.name/posts/2021-12-11-detecting-if-pwa-twa-is-installed
const ua = navigator.userAgent
const ios = ua.match(/iPhone|iPad|iPod/)
const standalone = window.matchMedia('(display-mode: standalone)').matches
const isInstalled = !!(standalone || (ios && !ua.match(/Safari/)))
const registerPeriodicSync = (swUrl: string, r: ServiceWorkerRegistration) => {
setInterval(async () => {
if (!online.value)
return
const resp = await fetch(swUrl, {
cache: 'no-store',
headers: {
'cache': 'no-store',
'cache-control': 'no-cache',
},
})
if (resp?.status === 200)
await r.update()
}, 60 * 60 * 1000 /* 1 hour */)
}
const {
needRefresh, updateServiceWorker,
} = useRegisterSW({
immediate: true,
onRegisterError() {
registrationError.value = true
},
onRegisteredSW(swUrl, r) {
// should add support in pwa plugin
if (r?.active?.state === 'activated') {
swActivated.value = true
registerPeriodicSync(swUrl, r)
}
else if (r?.installing) {
r.installing.addEventListener('statechange', (e) => {
const sw = e.target as ServiceWorker
swActivated.value = sw.state === 'activated'
if (swActivated.value)
registerPeriodicSync(swUrl, r)
})
}
},
})
const close = async () => {
needRefresh.value = false
}
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type InstallPromptEvent = Event & {
prompt: () => void
userChoice: Promise<{ outcome: 'dismissed' | 'accepted' }>
}
let deferredPrompt: InstallPromptEvent | undefined
const beforeInstallPrompt = (e: Event) => {
e.preventDefault()
deferredPrompt = e as InstallPromptEvent
showInstallPrompt.value = true
}
window.addEventListener('beforeinstallprompt', beforeInstallPrompt)
window.addEventListener('appinstalled', () => {
deferredPrompt = undefined
showInstallPrompt.value = false
})
const install = async () => {
if (!showInstallPrompt.value || !deferredPrompt) {
showInstallPrompt.value = false
return
}
showInstallPrompt.value = false
await nextTick()
deferredPrompt.prompt()
const { outcome } = await deferredPrompt.userChoice
if (outcome === 'dismissed')
window.removeEventListener('beforeinstallprompt', beforeInstallPrompt)
}
const cancelInstall = () => {
showInstallPrompt.value = false
}
return {
provide: {
pwa: reactive({
isInstalled,
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showInstallPrompt,
cancelInstall,
install,
swActivated,
registrationError,
needRefresh,
updateServiceWorker,
close,
}),
},
}
})