85 lines
2.1 KiB
TypeScript
85 lines
2.1 KiB
TypeScript
import { useCallback, useMemo, useRef, useState } from "react";
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import { PlayerContext, type PlayerItem } from "./PlayerContext.ts";
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export function PlayerProvider({ children }: { children: React.ReactNode }) {
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const [current, setCurrent] = useState<PlayerItem | null>(null);
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const [playing, setPlaying] = useState(false);
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const [currentTime, setCurrentTime] = useState(0);
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const [duration, setDuration] = useState(0);
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// GlobalPlayer registers the active MediaPlayer's imperative handles here
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const seekRef = useRef<((t: number) => void) | null>(null);
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const toggleRef = useRef<(() => void) | null>(null);
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// Suppresses stale timeupdate callbacks that fire between play() and the old
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// MediaPlayer's unmount cleanup. Cleared when the new media fires onPlayStateChange(true).
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const suppressUpdates = useRef(false);
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const play = useCallback((item: PlayerItem) => {
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suppressUpdates.current = true;
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setCurrent(item);
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setCurrentTime(0);
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setDuration(0);
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setPlaying(false);
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}, []);
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const stop = useCallback(() => {
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setCurrent(null);
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setPlaying(false);
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setCurrentTime(0);
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setDuration(0);
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}, []);
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const seekTo = useCallback((t: number) => {
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seekRef.current?.(t);
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setCurrentTime(t); // optimistic — prevents waveform jitter before timeupdate fires
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}, []);
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const togglePlay = useCallback(() => {
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toggleRef.current?.();
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}, []);
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const onPlayStateChange = useCallback((p: boolean) => {
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if (p) suppressUpdates.current = false;
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setPlaying(p);
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}, []);
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const onTimeUpdate = useCallback((t: number, d: number) => {
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if (suppressUpdates.current) return;
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setCurrentTime(t);
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setDuration(d);
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}, []);
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const value = useMemo(() => ({
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current,
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playing,
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currentTime,
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duration,
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play,
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stop,
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seekTo,
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togglePlay,
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seekRef,
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toggleRef,
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onPlayStateChange,
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onTimeUpdate,
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}), [
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current,
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playing,
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currentTime,
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duration,
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play,
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stop,
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seekTo,
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togglePlay,
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onPlayStateChange,
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onTimeUpdate,
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]);
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return (
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<PlayerContext.Provider value={value}>
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{children}
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</PlayerContext.Provider>
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);
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}
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