Bucket Feature Flags MCP Server

import { useCallback, useEffect, useState } from "preact/hooks"; export const useTimer = ({ initialDuration, enabled, onEnd, }: { initialDuration: number; enabled: boolean; onEnd: () => void; }): { duration: number; elapsedFraction: number; startTime: number; endTime: number; stopped: boolean; startWithDuration: (duration: number) => void; stop: () => void; } => { const [stopped, setStopped] = useState(!enabled); const [duration, setDuration] = useState(initialDuration); const [startTime, setStartTime] = useState(Date.now()); const [currentTime, setCurrentTime] = useState(Date.now()); useEffect(() => { if (stopped) return; const t = setInterval(() => { setCurrentTime(Date.now()); if (Date.now() >= startTime + duration) { clearTimeout(t); setStopped(true); onEnd(); } }, 25); return () => { clearTimeout(t); }; }, [duration, onEnd, startTime, stopped]); const stop = useCallback(() => { setStopped(true); }, []); const startWithDuration = useCallback((nextDuration: number) => { setStartTime(Date.now()); setDuration(nextDuration); setStopped(false); }, []); const endTime = startTime + duration; const elapsedMs = stopped ? 0 : currentTime - startTime; const elapsedFraction = elapsedMs / duration; return { duration, elapsedFraction, startTime, endTime, stopped, startWithDuration, stop, }; };