pinafore/src/service-worker.js

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import {
assets as __assets__,
shell as __shell__,
routes as __routes__
} from '../__sapper__/service-worker.js'
import { get, post } from './routes/_utils/ajax.js'
import { setWebShareData, closeKeyValIDBConnection } from './routes/_database/webShare.js'
import { getKnownInstances } from './routes/_database/knownInstances.js'
import { basename } from './routes/_api/utils.js'
const timestamp = process.env.SAPPER_TIMESTAMP
const ASSETS = `assets_${timestamp}`
const WEBPACK_ASSETS = `webpack_assets_${timestamp}`
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const ON_DEMAND_CACHE = [
{
regex: /tesseract-core\.wasm/,
cache: WEBPACK_ASSETS
},
{
regex: /traineddata\.gz/,
cache: ASSETS
},
{
regex: /\$polyfill\$/,
cache: WEBPACK_ASSETS
},
{
regex: /TwemojiCountryFlags\.woff2/,
cache: ASSETS
},
{
regex: /_splash\.png$/,
cache: ASSETS
}
]
// `static` is an array of everything in the `static` directory
const assets = __assets__
.map(file => file.startsWith('/') ? file : `/${file}`)
.filter(filename => !filename.endsWith('.map'))
.filter(filename => filename !== '/robots.txt')
.filter(filename => !filename.includes('traineddata.gz')) // cache on-demand
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.filter(filename => !filename.endsWith('.webapp')) // KaiOS manifest
.filter(filename => !/emoji-.*?\.json$/.test(filename)) // useless to cache; it already goes in IndexedDB
.filter(filename => !/screenshot-.*?\.png/.test(filename)) // only used during PWA installation, don't bother caching
.filter(filename => !/TwemojiCountryFlags\.woff2/.test(filename)) // cache on-demand
.filter(filename => !/_splash\.png$/.test(filename)) // only used for iOS PWA splash screen, cache on-demand
// `shell` is an array of all the files generated by webpack
// also contains '/index.html' for some reason
const webpackAssets = __shell__
.filter(filename => !filename.endsWith('.map')) // don't bother with sourcemaps
.filter(filename => !filename.includes('tesseract-core.wasm')) // cache on-demand
.filter(filename => !filename.includes('LICENSE')) // don't bother with license files
.filter(filename => !filename.includes('$polyfill$')) // polyfills are cached dynamically
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// `routes` is an array of `{ pattern: RegExp }` objects that
// match the pages in your src
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const routes = __routes__
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self.addEventListener('install', event => {
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event.waitUntil((async () => {
await Promise.all([
caches.open(WEBPACK_ASSETS).then(cache => cache.addAll(webpackAssets)),
caches.open(ASSETS).then(cache => cache.addAll(assets))
])
// We shouldn't have to do this, but the previous page could be an old one,
// which would not send us a postMessage to skipWaiting().
// See https://github.com/nolanlawson/pinafore/issues/1243
self.skipWaiting()
})())
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})
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self.addEventListener('activate', event => {
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event.waitUntil((async () => {
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const keys = await caches.keys()
// delete old asset/ondemand caches
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for (const key of keys) {
if (key !== ASSETS &&
!key.startsWith('webpack_assets_')) {
await caches.delete(key)
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}
}
// for webpack static, keep the two latest builds because we may need
// them when the service worker has installed but the page has not
// yet reloaded (e.g. when it gives the toast saying "please reload"
// but then you don't refresh and instead load an async chunk)
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const webpackKeysToDelete = keys
.filter(key => key.startsWith('webpack_assets_'))
.sort((a, b) => {
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const aTimestamp = parseInt(a.substring(15), 10)
const bTimestamp = parseInt(b.substring(15), 10)
return bTimestamp < aTimestamp ? -1 : 1
})
.slice(2)
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for (const key of webpackKeysToDelete) {
await caches.delete(key)
}
await self.clients.claim()
})())
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})
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self.addEventListener('fetch', event => {
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const req = event.request
const url = new URL(req.url)
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// don't try to handle e.g. data: URIs
if (!url.protocol.startsWith('http')) {
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return
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}
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event.respondWith((async () => {
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const sameOrigin = url.origin === self.origin
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if (sameOrigin) {
if (req.method === 'POST' && url.pathname === '/share') {
// handle Web Share Target requests (see manifest.json)
const formData = await req.formData()
const title = formData.get('title')
const text = formData.get('text')
const url = formData.get('url')
const file = formData.get('file')
await setWebShareData({ title, text, url, file })
await closeKeyValIDBConnection() // don't need to keep the IDB connection open
return Response.redirect(
'/?pwa=true&compose=true', // pwa=true because this can only be invoked from a PWA
303 // 303 recommended by https://web.dev/web-share-target/
)
}
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// always serve webpack-generated resources and
// static from the cache if possible
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const response = await caches.match(req)
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if (response) {
return response
}
for (const { regex, cache } of ON_DEMAND_CACHE) {
if (regex.test(url.pathname)) {
// cache this on-demand
const response = await fetch(req)
if (response && response.status >= 200 && response.status < 300) {
const clonedResponse = response.clone()
/* no await */
caches.open(cache).then(cache => cache.put(req, clonedResponse))
}
return response
}
}
// for routes, serve the /service-worker-index.html file from the most recent
// static cache
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if (routes.find(route => route.pattern.test(url.pathname))) {
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const response = await caches.match('/service-worker-index.html')
if (response) {
return response
}
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}
}
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// for everything else, go network-only
return fetch(req)
})())
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})
self.addEventListener('push', event => {
event.waitUntil((async () => {
const data = event.data.json()
// If there is only once instance, then we know for sure that the push notification came from it
const knownInstances = await getKnownInstances()
if (knownInstances.length !== 1) {
// TODO: Mastodon currently does not tell us which instance the push notification came from.
// So we have to guess and currently just choose the first one. We _could_ locally store the instance that
// currently has push notifications enabled, but this would only work for one instance at a time.
// See: https://github.com/mastodon/mastodon/issues/22183
await showSimpleNotification(data)
return
}
const origin = basename(knownInstances[0])
try {
const notification = await get(`${origin}/api/v1/notifications/${data.notification_id}`, {
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Authorization: `Bearer ${data.access_token}`
}, { timeout: 2000 })
await showRichNotification(data, notification)
} catch (e) {
await showSimpleNotification(data)
}
})())
})
async function showSimpleNotification (data) {
await self.registration.showNotification(data.title, {
badge: '/icon-push-badge.png',
icon: data.icon,
body: data.body,
tag: data.notification_id,
data: {
url: `${self.origin}/notifications`
}
})
}
async function showRichNotification (data, notification) {
const { icon, body } = data
const tag = notification.id
const { origin } = self.location
const badge = '/icon-push-badge.png'
switch (notification.type) {
case 'follow':
case 'follow_request':
case 'admin.report':
case 'admin.sign_up': {
await self.registration.showNotification(data.title, {
badge,
icon,
body,
tag,
data: {
url: `${origin}/accounts/${notification.account.id}`
}
})
break
}
case 'reblog':
case 'favourite':
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case 'status':
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case 'poll': {
await self.registration.showNotification(data.title, {
badge,
icon,
body,
tag,
data: {
url: `${origin}/statuses/${notification.status.id}`
}
})
break
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}
case 'mention': {
const isPublic = ['public', 'unlisted'].includes(notification.status.visibility)
const actions = [
isPublic && {
action: 'reblog',
icon: '/icon-push-fa-retweet.png', // generated manually from font-awesome-svg
title: 'intl.reblog'
},
{
action: 'favourite',
icon: '/icon-push-fa-star.png', // generated manually from font-awesome-svg
title: 'intl.favorite'
}
].filter(Boolean)
await self.registration.showNotification(data.title, {
badge,
icon,
body,
tag,
data: {
instance: new URL(data.icon).origin,
status_id: notification.status.id,
access_token: data.access_token,
url: `${origin}/statuses/${notification.status.id}`
},
actions
})
break
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}
}
}
const cloneNotification = notification => {
const clone = {}
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for (const k in notification) {
// deliberately not doing a hasOwnProperty check, but skipping
// functions and null props like onclick and onshow and showTrigger
if (typeof notification[k] !== 'function' && notification[k] !== null) {
clone[k] = notification[k]
}
}
return clone
}
const updateNotificationWithoutAction = (notification, action) => {
const newNotification = cloneNotification(notification)
newNotification.actions = newNotification.actions.filter(item => item.action !== action)
return self.registration.showNotification(newNotification.title, newNotification)
}
self.addEventListener('notificationclick', event => {
event.waitUntil((async () => {
switch (event.action) {
case 'reblog': {
const url = `${event.notification.data.instance}/api/v1/statuses/${event.notification.data.status_id}/reblog`
await post(url, null, {
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Authorization: `Bearer ${event.notification.data.access_token}`
})
await updateNotificationWithoutAction(event.notification, 'reblog')
break
}
case 'favourite': {
const url = `${event.notification.data.instance}/api/v1/statuses/${event.notification.data.status_id}/favourite`
await post(url, null, {
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Authorization: `Bearer ${event.notification.data.access_token}`
})
await updateNotificationWithoutAction(event.notification, 'favourite')
break
}
default: {
await self.clients.openWindow(event.notification.data.url)
await event.notification.close()
break
}
}
})())
})
self.addEventListener('message', (event) => {
switch (event.data) {
case 'skip-waiting':
self.skipWaiting()
break
}
})