jollywhoppers.com
Bluesky app fork with some witchin' additions 馃挮
witchsky.app
bluesky
fork
client
1import {useEffect, useRef} from 'react'
2
3import {getCurrentState, onAppStateChange} from '#/lib/appState'
4import {useAnalytics} from '#/analytics'
5
6/**
7 * Tracks passive analytics like app foreground/background time.
8 */
9export function PassiveAnalytics() {
10 const ax = useAnalytics()
11 const lastActive = useRef(
12 getCurrentState() === 'active' ? performance.now() : null,
13 )
14
15 useEffect(() => {
16 const sub = onAppStateChange(state => {
17 if (state === 'active') {
18 lastActive.current = performance.now()
19 ax.metric('state:foreground', {})
20 } else if (lastActive.current !== null) {
21 ax.metric('state:background', {
22 secondsActive: Math.round(
23 (performance.now() - lastActive.current) / 1e3,
24 ),
25 })
26 }
27 })
28 return () => sub.remove()
29 }, [ax])
30
31 return null
32}