160 lines
6.7 KiB
JavaScript
160 lines
6.7 KiB
JavaScript
import ServiceWorkerStorage from 'serviceworker-storage'
|
|
import { numWithUnits } from '../lib/format'
|
|
|
|
// we store existing push subscriptions to keep them in sync with server
|
|
const storage = new ServiceWorkerStorage('sw:storage', 1)
|
|
|
|
// for communication between app and service worker
|
|
// see https://developer.mozilla.org/en-US/docs/Web/API/MessageChannel
|
|
let messageChannelPort
|
|
|
|
// keep track of item ids where we received a MENTION notification already to not show one again
|
|
const itemMentions = []
|
|
|
|
export function onPush (sw) {
|
|
return async (event) => {
|
|
const payload = event.data?.json()
|
|
if (!payload) return
|
|
const { tag } = payload.options
|
|
event.waitUntil((async () => {
|
|
if (skipNotification(payload)) return
|
|
if (immediatelyShowNotification(payload)) {
|
|
return sw.registration.showNotification(payload.title, payload.options)
|
|
}
|
|
|
|
// fetch existing notifications with same tag
|
|
const notifications = await sw.registration.getNotifications({ tag })
|
|
|
|
// since we used a tag filter, there should only be zero or one notification
|
|
if (notifications.length > 1) {
|
|
const message = `[sw:push] more than one notification with tag ${tag} found`
|
|
messageChannelPort?.postMessage({ level: 'error', message })
|
|
console.error(message)
|
|
return null
|
|
}
|
|
|
|
// save item id of MENTION notification so we can skip following ones
|
|
if (tag === 'MENTION' && payload.options.data?.itemId) itemMentions.push(payload.options.data.itemId)
|
|
|
|
if (notifications.length === 0) {
|
|
// incoming notification is first notification with this tag
|
|
return sw.registration.showNotification(payload.title, payload.options)
|
|
}
|
|
|
|
const currentNotification = notifications[0]
|
|
return mergeAndShowNotification(sw, payload, currentNotification)
|
|
})())
|
|
}
|
|
}
|
|
|
|
const skipNotification = ({ options: { tag, data } }) => {
|
|
return tag === 'MENTION' && itemMentions.includes(data.itemId)
|
|
}
|
|
|
|
// if there is no tag or it's a TIP or EARN notification
|
|
// we don't need to merge notifications and thus the notification should be immediately shown using `showNotification`
|
|
const immediatelyShowNotification = ({ options: { tag } }) => !tag || ['TIP', 'EARN'].includes(tag.split('-')[0])
|
|
|
|
const mergeAndShowNotification = (sw, payload, currentNotification) => {
|
|
const { data: incomingData } = payload.options
|
|
const { tag, data: currentData } = currentNotification
|
|
|
|
// how many notification with this tag are there already?
|
|
// (start from 2 and +1 to include incoming notification)
|
|
const amount = currentNotification.data?.amount ? currentNotification.data.amount + 1 : 2
|
|
|
|
let title = ''
|
|
const newData = {}
|
|
if (tag === 'REPLY') {
|
|
title = `You have ${amount} new replies`
|
|
} else if (tag === 'MENTION') {
|
|
title = `You were mentioned ${amount} times`
|
|
} else if (tag === 'REFERRAL') {
|
|
title = `${amount} stackers joined via your referral links`
|
|
} else if (tag === 'INVITE') {
|
|
title = `your invite has been redeemed by ${amount} stackers`
|
|
} else if (tag === 'DEPOSIT') {
|
|
const currentSats = currentData.sats
|
|
const incomingSats = incomingData.sats
|
|
const newSats = currentSats + incomingSats
|
|
title = `${numWithUnits(newSats, { abbreviate: false })} were deposited in your account`
|
|
newData.sats = newSats
|
|
}
|
|
|
|
// close current notification before showing new one to "merge" notifications
|
|
currentNotification.close()
|
|
const newNotificationOptions = { icon: currentNotification.icon, tag, data: { url: '/notifications', amount, ...newData } }
|
|
return sw.registration.showNotification(title, newNotificationOptions)
|
|
}
|
|
|
|
export function onNotificationClick (sw) {
|
|
return (event) => {
|
|
const url = event.notification.data?.url
|
|
if (url) {
|
|
event.waitUntil(sw.clients.openWindow(url))
|
|
}
|
|
event.notification.close()
|
|
}
|
|
}
|
|
|
|
export function onPushSubscriptionChange (sw) {
|
|
// https://medium.com/@madridserginho/how-to-handle-webpush-api-pushsubscriptionchange-event-in-modern-browsers-6e47840d756f
|
|
return async (oldSubscription, newSubscription) => {
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/pushsubscriptionchange_event
|
|
// fallbacks since browser may not set oldSubscription and newSubscription
|
|
messageChannelPort?.postMessage({ message: '[sw:handlePushSubscriptionChange] invoked' })
|
|
oldSubscription ??= await storage.getItem('subscription')
|
|
newSubscription ??= await sw.registration.pushManager.getSubscription()
|
|
if (!newSubscription) {
|
|
// no subscription exists at the moment
|
|
messageChannelPort?.postMessage({ message: '[sw:handlePushSubscriptionChange] no existing subscription found' })
|
|
return
|
|
}
|
|
if (oldSubscription?.endpoint === newSubscription.endpoint) {
|
|
// subscription did not change. no need to sync with server
|
|
messageChannelPort?.postMessage({ message: '[sw:handlePushSubscriptionChange] old subscription matches existing subscription' })
|
|
return
|
|
}
|
|
// convert keys from ArrayBuffer to string
|
|
newSubscription = JSON.parse(JSON.stringify(newSubscription))
|
|
const variables = {
|
|
endpoint: newSubscription.endpoint,
|
|
p256dh: newSubscription.keys.p256dh,
|
|
auth: newSubscription.keys.auth,
|
|
oldEndpoint: oldSubscription?.endpoint
|
|
}
|
|
const query = `
|
|
mutation savePushSubscription($endpoint: String!, $p256dh: String!, $auth: String!, $oldEndpoint: String!) {
|
|
savePushSubscription(endpoint: $endpoint, p256dh: $p256dh, auth: $auth, oldEndpoint: $oldEndpoint) {
|
|
id
|
|
}
|
|
}`
|
|
const body = JSON.stringify({ query, variables })
|
|
await fetch('/api/graphql', {
|
|
method: 'POST',
|
|
headers: {
|
|
'Content-type': 'application/json'
|
|
},
|
|
body
|
|
})
|
|
messageChannelPort?.postMessage({ message: '[sw:handlePushSubscriptionChange] synced push subscription with server', context: { endpoint: variables.endpoint, oldEndpoint: variables.oldEndpoint } })
|
|
await storage.setItem('subscription', JSON.parse(JSON.stringify(newSubscription)))
|
|
}
|
|
}
|
|
|
|
export function onMessage (sw) {
|
|
return (event) => {
|
|
if (event.data.action === 'MESSAGE_PORT') {
|
|
messageChannelPort = event.ports[0]
|
|
}
|
|
messageChannelPort?.postMessage({ message: '[sw:message] received message', context: { action: event.data.action } })
|
|
if (event.data.action === 'STORE_SUBSCRIPTION') {
|
|
messageChannelPort?.postMessage({ message: '[sw:message] storing subscription in IndexedDB', context: { endpoint: event.data.subscription.endpoint } })
|
|
return event.waitUntil(storage.setItem('subscription', event.data.subscription))
|
|
}
|
|
if (event.data.action === 'SYNC_SUBSCRIPTION') {
|
|
return event.waitUntil(onPushSubscriptionChange(sw)(event.oldSubscription, event.newSubscription))
|
|
}
|
|
}
|
|
}
|