pinafore/routes/_store/observers/onlineObservers.js
2018-04-15 16:00:16 -07:00

40 lines
1.1 KiB
JavaScript

import debounce from 'lodash-es/debounce'
import { toast } from '../../_utils/toast'
const OFFLINE_DELAY = 5000
const NOTIFY_OFFLINE_LIMIT = 1
let notifyCount = 0
// debounce to avoid notifying for a short connection issue
const notifyOffline = debounce(() => {
if (process.browser && !navigator.onLine && ++notifyCount <= NOTIFY_OFFLINE_LIMIT) {
toast.say('You seem to be offline. You can still read toots while offline.')
}
}, OFFLINE_DELAY)
export function onlineObservers (store) {
if (!process.browser) {
return
}
let meta = document.getElementById('theThemeColor')
let oldTheme = meta.content
store.observe('online', online => {
document.body.classList.toggle('offline', !online)
if (online) {
meta.content = oldTheme
} else {
let offlineThemeColor = window.__themeColors.offline
if (meta.content !== offlineThemeColor) {
oldTheme = meta.content
}
meta.content = offlineThemeColor
notifyOffline()
}
})
window.addEventListener('offline', () => store.set({online: false}))
window.addEventListener('online', () => store.set({online: true}))
}