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sw.js
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sw.js
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/* eslint-env serviceworker */
import 'virtual:pleroma-fe/service_worker_env'
import { storage } from 'src/lib/storage.js'
import { parseNotification } from './services/entity_normalizer/entity_normalizer.service.js'
import { prepareNotificationObject } from './services/notification_utils/notification_utils.js'
import { shouldCache, cacheKey, emojiCacheKey } from './services/sw/sw.js'
import { createI18n } from 'vue-i18n'
// Collects all messages for service workers
// Needed because service workers cannot use dynamic imports
// See /build/sw_plugin.js for more information
import messages from 'virtual:pleroma-fe/service_worker_messages'
const i18n = createI18n({
// By default, use the browser locale, we will update it if neccessary
locale: 'en',
fallbackLocale: 'en',
messages
})
const state = {
lastFocused: null,
notificationIds: new Set(),
allowedNotificationTypes: null
}
function getWindowClients () {
return clients.matchAll({ includeUncontrolled: true })
.then((clientList) => clientList.filter(({ type }) => type === 'window'))
}
const setSettings = async () => {
const vuexState = await storage.getItem('vuex-lz')
const locale = vuexState.config.interfaceLanguage || 'en'
i18n.locale = locale
const notificationsNativeArray = Object.entries(vuexState.config.notificationNative)
state.webPushAlwaysShowNotifications = vuexState.config.webPushAlwaysShowNotifications
state.allowedNotificationTypes = new Set(
notificationsNativeArray
.filter(([, v]) => v)
.map(([k]) => {
switch (k) {
case 'mentions':
return 'mention'
case 'statuses':
return 'status'
case 'likes':
return 'like'
case 'repeats':
return 'repeat'
case 'emojiReactions':
return 'pleroma:emoji_reaction'
case 'reports':
return 'pleroma:report'
case 'followRequest':
return 'follow_request'
case 'follows':
return 'follow'
case 'polls':
return 'poll'
default:
return k
}
})
)
}
const showPushNotification = async (event) => {
const activeClients = await getWindowClients()
await setSettings()
// Only show push notifications if all tabs/windows are closed
if (state.webPushAlwaysShowNotifications || activeClients.length === 0) {
const data = event.data.json()
const url = `${self.registration.scope}api/v1/notifications/${data.notification_id}`
const notification = await fetch(url, { headers: { Authorization: 'Bearer ' + data.access_token } })
const notificationJson = await notification.json()
const parsedNotification = parseNotification(notificationJson)
const res = prepareNotificationObject(parsedNotification, i18n)
if (state.webPushAlwaysShowNotifications || state.allowedNotificationTypes.has(parsedNotification.type)) {
return self.registration.showNotification(res.title, res)
}
}
return Promise.resolve()
}
const cacheFiles = self.serviceWorkerOption.assets
const isEmoji = req => {
if (req.method !== 'GET') {
return false
}
const url = new URL(req.url)
return url.pathname.startsWith('/emoji/')
}
const isNotMedia = req => {
if (req.method !== 'GET') {
return false
}
const url = new URL(req.url)
return !url.pathname.startsWith('/media/')
}
const isAsset = req => {
const url = new URL(req.url)
return cacheFiles.includes(url.pathname)
}
const isSuccessful = (resp) => {
if (!resp.ok) {
return false
}
if ((new URL(resp.url)).pathname === '/index.html') {
// For index.html itself, there is no fallback possible.
return true
}
const type = resp.headers.get('Content-Type')
// Backend will revert to index.html if the file does not exist, so text/html for emojis and assets is a failure
return type && !type.includes('text/html')
}
self.addEventListener('install', async (event) => {
if (shouldCache) {
event.waitUntil((async () => {
// Do not preload i18n and emoji annotations to speed up loading
const shouldPreload = (route) => {
return !route.startsWith('/static/js/i18n/') && !route.startsWith('/static/js/emoji-annotations/')
}
const cache = await caches.open(cacheKey)
await Promise.allSettled(cacheFiles.filter(shouldPreload).map(async (route) => {
// https://developer.mozilla.org/en-US/docs/Web/API/Cache/add
// originally we used addAll() but it will raise a problem in one edge case:
// when the file for the route is not found, backend will return index.html with code 200
// but it's wrong, and it's cached, so we end up with a bad cache.
// this can happen when you refresh when you are in the process of upgrading
// the frontend.
const resp = await fetch(route)
if (isSuccessful(resp)) {
await cache.put(route, resp)
}
}))
})())
}
})
self.addEventListener('activate', async (event) => {
if (shouldCache) {
event.waitUntil((async () => {
const cache = await caches.open(cacheKey)
const keys = await cache.keys()
await Promise.all(
keys.filter(request => {
const url = new URL(request.url)
const shouldKeep = cacheFiles.includes(url.pathname)
return !shouldKeep
}).map(k => cache.delete(k))
)
})())
}
})
self.addEventListener('push', async (event) => {
if (event.data) {
// Supposedly, we HAVE to return a promise inside waitUntil otherwise it will
// show (extra) notification that website is updated in background
event.waitUntil(showPushNotification(event))
}
})
self.addEventListener('message', async (event) => {
await setSettings()
const { type, content } = event.data
if (type === 'desktopNotification') {
const { title, ...rest } = content
const { tag, type } = rest
if (state.notificationIds.has(tag)) return
state.notificationIds.add(tag)
setTimeout(() => state.notificationIds.delete(tag), 10000)
if (state.allowedNotificationTypes.has(type)) {
self.registration.showNotification(title, rest)
}
}
if (type === 'desktopNotificationClose') {
const { id, all } = content
const search = all ? null : { tag: id }
const notifications = await self.registration.getNotifications(search)
notifications.forEach(n => n.close())
}
if (type === 'updateFocus') {
state.lastFocused = event.source.id
const notifications = await self.registration.getNotifications()
notifications.forEach(n => n.close())
}
})
self.addEventListener('notificationclick', (event) => {
event.notification.close()
event.waitUntil(getWindowClients().then((list) => {
for (let i = 0; i < list.length; i++) {
const client = list[i]
client.postMessage({ type: 'notificationClicked', id: event.notification.tag })
}
for (let i = 0; i < list.length; i++) {
const client = list[i]
if (state.lastFocused === null || client.id === state.lastFocused) {
if ('focus' in client) return client.focus()
}
}
if (clients.openWindow) return clients.openWindow('/')
}))
})
self.addEventListener('fetch', (event) => {
// Do not mess up with remote things
const isSameOrigin = (new URL(event.request.url)).origin === self.location.origin
if (shouldCache && event.request.method === 'GET' && isSameOrigin && isNotMedia(event.request)) {
// this is a bit spammy
// console.debug('[Service worker] fetch:', event.request.url)
event.respondWith((async () => {
const r = await caches.match(event.request)
const isEmojiReq = isEmoji(event.request)
if (r && isSuccessful(r)) {
console.debug('[Service worker] already cached:', event.request.url)
return r
}
try {
const response = await fetch(event.request)
if (response.ok &&
isSuccessful(response) &&
(isEmojiReq || isAsset(event.request))) {
console.debug(`[Service worker] caching ${isEmojiReq ? 'emoji' : 'asset'}:`, event.request.url)
const cache = await caches.open(isEmojiReq ? emojiCacheKey : cacheKey)
await cache.put(event.request.clone(), response.clone())
}
return response
} catch (e) {
console.error('[Service worker] error when caching emoji:', e)
throw e
}
})())
}
})

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