kopia lustrzana https://github.com/Tldraw/Tldraw
32 wiersze
768 B
TypeScript
32 wiersze
768 B
TypeScript
import { TLInstancePresence } from '@tldraw/tlschema'
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import { useMemo } from 'react'
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import { useValue } from 'signia-react'
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import { useApp } from './useApp'
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// TODO: maybe move this to a computed property on the App class?
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/**
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* @returns The list of peer UserIDs
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* @internal
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*/
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export function usePresence(userId: string): TLInstancePresence | null {
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const app = useApp()
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const $presences = useMemo(() => {
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return app.store.query.records('instance_presence', () => ({
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userId: { eq: userId },
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}))
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}, [app, userId])
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const latestPresence = useValue(
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`latestPresence:${userId}`,
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() => {
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return $presences.value
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.slice()
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.sort((a, b) => b.lastActivityTimestamp - a.lastActivityTimestamp)[0]
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},
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[]
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)
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return latestPresence ?? null
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}
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