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import runtime from 'serviceworker-webpack-plugin/lib/runtime'
function urlBase64ToUint8Array (base64String) {
const padding = '='.repeat((4 - base64String.length % 4) % 4)
const base64 = (base64String + padding)
.replace(/-/g, '+')
.replace(/_/g, '/')
const rawData = window.atob(base64)
return Uint8Array.from([...rawData].map((char) => char.charCodeAt(0)))
}
function isPushSupported () {
return 'serviceWorker' in navigator && 'PushManager' in window
}
function registerServiceWorker () {
return runtime.register()
.catch((err) => console.error('Unable to register service worker.', err))
}
function askPermission () {
return new Promise((resolve, reject) => {
const Notification = window.Notification
if (!Notification) return reject(new Error('Notifications disabled'))
if (Notification.permission !== 'default') return resolve(Notification.permission)
const permissionResult = Notification.requestPermission(resolve)
if (permissionResult) permissionResult.then(resolve, reject)
}).then((permissionResult) => {
if (permissionResult !== 'granted') throw new Error('We weren\'t granted permission.')
return permissionResult
})
}
function subscribe (registration, isEnabled, vapidPublicKey) {
if (!isEnabled) return Promise.reject(new Error('Web Push is disabled in config'))
if (!vapidPublicKey) return Promise.reject(new Error('VAPID public key is not found'))
const subscribeOptions = {
userVisibleOnly: true,
applicationServerKey: urlBase64ToUint8Array(vapidPublicKey)
}
return registration.pushManager.subscribe(subscribeOptions)
}
function sendSubscriptionToBackEnd (subscription, token) {
return window.fetch('/api/v1/push/subscription/', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': `Bearer ${token}`
},
body: JSON.stringify({
subscription,
data: {
alerts: {
follow: true,
favourite: true,
mention: true,
reblog: true
}
}
})
})
.then((response) => {
if (!response.ok) throw new Error('Bad status code from server.')
return response.json()
})
.then((responseData) => {
if (!responseData.id) throw new Error('Bad response from server.')
return responseData
})
}
export default function registerPushNotifications (isEnabled, vapidPublicKey, token) {
if (isPushSupported()) {
registerServiceWorker()
.then((registration) => {
return askPermission()
.then(() => subscribe(registration, isEnabled, vapidPublicKey))
.then((subscription) => sendSubscriptionToBackEnd(subscription, token))
.catch((e) => console.warn(`Failed to setup Web Push Notifications: ${e.message}`))
})
}
}
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