expo-running-kit/build/hooks/useSession.js

Expo native module for tracking running and walking workouts — GPS, pace, cadence, auto-pause, and laps.

import { useEffect, useRef, useState } from "react";
import { useEvent } from "expo";
import RunningKit from "../RunningKitModule";
export function useSession() {
    const [sessionState, setSessionState] = useState("idle");
    const [duration, setDuration] = useState(0);
    const sessionStateRef = useRef("idle");
    const timerRef = useRef(null);
    const durationRef = useRef(0);
    const sessionStatePayload = useEvent(RunningKit, "onSessionStateChange");
    useEffect(() => {
        if (!sessionStatePayload?.state)
            return;
        sessionStateRef.current = sessionStatePayload.state;
        setSessionState(sessionStatePayload.state);
    }, [sessionStatePayload]);
    useEffect(() => {
        if (sessionState === "active") {
            timerRef.current = setInterval(() => {
                setDuration((d) => {
                    const next = d + 1;
                    durationRef.current = next; // ← add this line
                    return next;
                });
            }, 1000);
        }
        else {
            if (timerRef.current)
                clearInterval(timerRef.current);
        }
        return () => {
            if (timerRef.current)
                clearInterval(timerRef.current);
        };
    }, [sessionState]);
    function resetSession() {
        setDuration(0);
        setSessionState("idle");
        sessionStateRef.current = "idle";
    }
    return { sessionState, sessionStateRef, duration, durationRef, resetSession };
}
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