Wave Player

/** * A React component for wavesurfer.js * * Usage: * * import WavesurferPlayer from '@wavesurfer/react' * * <WavesurferPlayer *   url="/my-server/audio.ogg" *   waveColor="purple" *   height={100} *   onReady={(wavesurfer) => console.log('Ready!', wavesurfer)} * /> */import {  useState,  useMemo,  useEffect,  useRef,  memo,  type ReactElement,  type RefObject,} from "react";import WaveSurfer, {  type WaveSurferEvents,  type WaveSurferOptions,} from "wavesurfer.js";type WavesurferEventHandler<T extends unknown[]> = (  wavesurfer: WaveSurfer,  ...args: T) => void;type OnWavesurferEvents = {  [K in keyof WaveSurferEvents as `on${Capitalize<K>}`]?: WavesurferEventHandler<    WaveSurferEvents[K]  >;};type PartialWavesurferOptions = Omit<WaveSurferOptions, "container">;/** * Props for the Wavesurfer component * @public */export type WavesurferProps = PartialWavesurferOptions &  OnWavesurferEvents & {    className?: string;  };/** * Shared waveform defaults applied to every useWavesurfer instance. * Override any of these by passing the corresponding option explicitly. */export const WAVESURFER_DEFAULTS = {  waveColor: "var(--muted-foreground)",  progressColor: "var(--primary)",  height: 64,  barWidth: 3,  barGap: 2,  barRadius: 2,  minPxPerSec: 1,  cursorWidth: 0,} as const satisfies Partial<WaveSurferOptions>;/** * Use wavesurfer instance */function useWavesurferInstance(  containerRef: RefObject<HTMLDivElement | null>,  options: Partial<WaveSurferOptions>,): WaveSurfer | null {  const [wavesurfer, setWavesurfer] = useState<WaveSurfer | null>(null);  // Flatten options object to an array of keys and values to compare them deeply in the hook deps  // Exclude plugins from deep comparison since they are mutated during initialization  const optionsWithoutPlugins = useMemo(() => {    // eslint-disable-next-line @typescript-eslint/no-unused-vars    const { plugins, ...rest } = options;    return rest;  }, [options]);  const flatOptions = useMemo(    () => Object.entries(optionsWithoutPlugins).flat(),    [optionsWithoutPlugins],  );  // Create a wavesurfer instance  useEffect(() => {    if (!containerRef?.current) return;    const ws = WaveSurfer.create({      ...optionsWithoutPlugins,      plugins: options.plugins,      container: containerRef.current,    });    setWavesurfer(ws);    return () => {      ws.destroy();    };    // Only recreate if plugins array reference changes (not on mutation)    // Users should memoize the plugins array to prevent unnecessary re-creation  }, [containerRef, options.plugins, ...flatOptions]);  return wavesurfer;}/** * Use wavesurfer state */function useWavesurferState(wavesurfer: WaveSurfer | null): {  isReady: boolean;  isPlaying: boolean;  currentTime: number;} {  const [isReady, setIsReady] = useState<boolean>(false);  const [isPlaying, setIsPlaying] = useState<boolean>(false);  const [hasFinished, setHasFinished] = useState<boolean>(false);  const [currentTime, setCurrentTime] = useState<number>(0);  useEffect(() => {    if (!wavesurfer) return;    const unsubscribeFns = [      wavesurfer.on("load", () => {        setIsReady(false);        setIsPlaying(false);        setCurrentTime(0);      }),      wavesurfer.on("ready", () => {        setIsReady(true);        setIsPlaying(false);        setHasFinished(false);        setCurrentTime(0);      }),      wavesurfer.on("finish", () => {        setHasFinished(true);      }),      wavesurfer.on("play", () => {        setIsPlaying(true);      }),      wavesurfer.on("pause", () => {        setIsPlaying(false);      }),      wavesurfer.on("timeupdate", () => {        setCurrentTime(wavesurfer.getCurrentTime());      }),      wavesurfer.on("destroy", () => {        setIsReady(false);        setIsPlaying(false);      }),    ];    return () => {      unsubscribeFns.forEach((fn) => fn());    };  }, [wavesurfer]);  return useMemo(    () => ({      isReady,      isPlaying,      hasFinished,      currentTime,    }),    [isPlaying, hasFinished, currentTime, isReady],  );}const EVENT_PROP_RE = /^on([A-Z])/;const isEventProp = (key: string) => EVENT_PROP_RE.test(key);const getEventName = (key: string) =>  key.replace(EVENT_PROP_RE, (_, $1) =>    $1.toLowerCase(),  ) as keyof WaveSurferEvents;/** * Parse props into wavesurfer options and events */function useWavesurferProps(  props: WavesurferProps,): [PartialWavesurferOptions, OnWavesurferEvents] {  // Props starting with `on` are wavesurfer events, e.g. `onReady`  // The rest of the props are wavesurfer options  return useMemo<[PartialWavesurferOptions, OnWavesurferEvents]>(() => {    const allOptions = { ...props };    const allEvents = { ...props };    for (const key in allOptions) {      if (isEventProp(key)) {        delete allOptions[key as keyof WavesurferProps];      } else {        delete allEvents[key as keyof WavesurferProps];      }    }    return [allOptions, allEvents];  }, [props]);}/** * Subscribe to wavesurfer events */function useWavesurferEvents(  wavesurfer: WaveSurfer | null,  events: OnWavesurferEvents,) {  const flatEvents = useMemo(() => Object.entries(events).flat(), [events]);  // Subscribe to events  useEffect(() => {    if (!wavesurfer) return;    const eventEntries = Object.entries(events);    if (!eventEntries.length) return;    const unsubscribeFns = eventEntries.map(([name, handler]) => {      const event = getEventName(name);      return wavesurfer.on(event, (...args) =>        (handler as WavesurferEventHandler<WaveSurferEvents[typeof event]>)(          wavesurfer,          ...args,        ),      );    });    return () => {      unsubscribeFns.forEach((fn) => fn());    };  }, [wavesurfer, ...flatEvents]);}/** * Wavesurfer player component * @see https://wavesurfer.xyz/docs/modules/wavesurfer * @public */const WavesurferPlayer = memo((props: WavesurferProps): ReactElement => {  const containerRef = useRef<HTMLDivElement | null>(null);  const { className, ...propsWithoutClassName } = props;  const [rawOptions, events] = useWavesurferProps(propsWithoutClassName);  // Apply WAVESURFER_DEFAULTS and resolve CSS var() tokens — same logic as  // useWavesurfer — so WavesurferPlayer benefits from shared defaults too.  const waveColor =    (rawOptions.waveColor as string | undefined) ??    WAVESURFER_DEFAULTS.waveColor;  const progressColor =    (rawOptions.progressColor as string | undefined) ??    WAVESURFER_DEFAULTS.progressColor;  const resolvedWaveColor = useCssVar(waveColor);  const resolvedProgressColor = useCssVar(progressColor);  const options = useMemo(() => {    const { waveColor: _wc, progressColor: _pc, ...rest } = rawOptions;    const cleanOptions = Object.fromEntries(      Object.entries(rest).filter(([, v]) => v !== undefined),    ) as PartialWavesurferOptions;    return {      ...WAVESURFER_DEFAULTS,      ...cleanOptions,      waveColor: resolvedWaveColor,      progressColor: resolvedProgressColor,    } as PartialWavesurferOptions;    // eslint-disable-next-line react-hooks/exhaustive-deps  }, [resolvedWaveColor, resolvedProgressColor, ...Object.values(rawOptions)]);  const wavesurfer = useWavesurferInstance(containerRef, options);  useWavesurferEvents(wavesurfer, events);  // Create a container div  return <div ref={containerRef} className={className} />;});/** * @public */export default WavesurferPlayer;/** * React hook for wavesurfer.js * * Automatically applies shared defaults (colors, height, bar shape, volume). * Any option passed explicitly will override the defaults. * CSS var() tokens in waveColor and progressColor are resolved at runtime * so they work correctly with the Canvas API. * * ``` * import { useWavesurfer } from '@/components/cors/wavesurfer-player' * * const App = () => { *   const containerRef = useRef<HTMLDivElement | null>(null) * *   const { wavesurfer, isReady, isPlaying, currentTime } = useWavesurfer({ *     container: containerRef, *     url: '/my-server/audio.ogg', *   }) * *   return <div ref={containerRef} /> * } * ``` * * @public */export function useWavesurfer({  container,  waveColor = WAVESURFER_DEFAULTS.waveColor,  progressColor = WAVESURFER_DEFAULTS.progressColor,  ...options}: Omit<WaveSurferOptions, "container"> & {  container: RefObject<HTMLDivElement | null>;}): ReturnType<typeof useWavesurferState> & {  wavesurfer: ReturnType<typeof useWavesurferInstance>;} {  // Resolve CSS var() tokens so the Canvas API receives actual color values  const resolvedWaveColor = useCssVar(waveColor as string);  const resolvedProgressColor = useCssVar(progressColor as string);  // Memoize mergedOptions so useWavesurferInstance gets a stable object reference.  // Without this, a new object is created every render → flatOptions changes →  // the instance is destroyed and recreated on every render, wiping spread props.  // Also strip undefined values so they don't silently override WAVESURFER_DEFAULTS.  const mergedOptions = useMemo(() => {    const cleanOptions = Object.fromEntries(      Object.entries(options).filter(([, v]) => v !== undefined),    ) as Partial<WaveSurferOptions>;    return {      ...WAVESURFER_DEFAULTS,      ...cleanOptions,      waveColor: resolvedWaveColor,      progressColor: resolvedProgressColor,    } as Partial<WaveSurferOptions>;    // eslint-disable-next-line react-hooks/exhaustive-deps  }, [resolvedWaveColor, resolvedProgressColor, ...Object.values(options)]);  const wavesurfer = useWavesurferInstance(container, mergedOptions);  const state = useWavesurferState(wavesurfer);  return useMemo(() => ({ ...state, wavesurfer }), [state, wavesurfer]);}export function useCssVar(value: string): string {  const [resolved, setResolved] = useState(value);  useEffect(() => {    // Only resolve if the value looks like a CSS variable    const match = value.match(/^var\((--[^)]+)\)$/);    if (!match) {      setResolved(value);      return;    }    const varName = match[1];    const raw = getComputedStyle(document.documentElement)      .getPropertyValue(varName)      .trim();    // shadcn stores values as bare HSL channels e.g. "222.2 47.4% 11.2%"    // Canvas needs a full color string — wrap in hsl() if needed    const isHslChannels = /^[\d.]+ [\d.]+% [\d.]+%$/.test(raw);    setResolved(raw ? (isHslChannels ? `hsl(${raw})` : raw) : value);  }, [value]);  return resolved;}

import * as React from "react";import { cn } from "@/lib/utils";import { Card, CardContent } from "@/components/ui/card";import { Button } from "@/components/ui/button";import { Slider } from "@/components/ui/slider";import {  Play,  Pause,  Volume2,  VolumeX,  Loader2,  RotateCcw,} from "lucide-react";import WavesurferPlayer from "@/lib/wave-cn";import type WaveSurfer from "wavesurfer.js";export interface WavePlayerProps {  /** Audio source URL */  src: string;  /** Optional title shown above the waveform */  title?: string;  /** Initial volume (0–1) */  defaultVolume?: number;  /** Audio bar color. Accepts any CSS value including var(--*) tokens @default "var(--muted-foreground)" */  waveColor?: string;  /** Progress bar color. Accepts any CSS value including var(--*) tokens @default "var(--primary)" */  progressColor?: string;  /** Waveform bar width in px @default 3 */  barWidth?: number;  /** Waveform bar gap in px @default 2 */  barGap?: number;  /** Rounded borders for bars @default 2 */  barRadius?: number;  /** Waveform height in px @default 64 */  waveHeight?: number;  /** Minimum pixels per second (zoom level) @default 1 */  minPxPerSec?: number;  /** Autoplay on mount */  autoPlay?: boolean;  /** Called when playback starts */  onPlay?: () => void;  /** Called when playback pauses */  onPause?: () => void;  /** Called when playback finishes */  onFinish?: () => void;  /** Called with current time on every audio process tick */  onTimeUpdate?: (currentTime: number, duration: number) => void;  className?: string;}// ─── Helpersfunction formatTime(t: number): string {  const m = Math.floor(t / 60);  const s = Math.floor(t % 60);  return `${m}:${s.toString().padStart(2, "0")}`;}// ─── Componentexport function WavePlayer({  src,  title,  defaultVolume = 0.8,  waveColor,  progressColor,  barWidth,  barGap,  barRadius,  waveHeight,  minPxPerSec,  autoPlay = false,  onPlay,  onPause,  onFinish,  onTimeUpdate,  className,}: WavePlayerProps) {  const wavesurferRef = React.useRef<WaveSurfer | null>(null);  const [isReady, setIsReady] = React.useState(false);  const [isPlaying, setIsPlaying] = React.useState(false);  const [volume, setVolume] = React.useState(defaultVolume);  const [isMuted, setIsMuted] = React.useState(false);  const [duration, setDuration] = React.useState(0);  const [currentTime, setCurrentTime] = React.useState(0);  // ── Controls  const togglePlay = React.useCallback(    () => wavesurferRef.current?.playPause(),    [],  );  const restart = React.useCallback(() => {    if (!wavesurferRef.current || !isReady) return;    wavesurferRef.current.setTime(0);    wavesurferRef.current.play();  }, [isReady]);  const handleVolume = React.useCallback((v: number[]) => {    const value = v[0];    setVolume(value);    setIsMuted(value === 0);    wavesurferRef.current?.setVolume(value);  }, []);  const toggleMute = React.useCallback(() => {    if (!wavesurferRef.current) return;    const next = !isMuted;    setIsMuted(next);    wavesurferRef.current.setVolume(next ? 0 : volume);  }, [isMuted, volume]);  const handleSeek = React.useCallback(    ([v]: number[]) => {      if (!wavesurferRef.current || !isReady) return;      wavesurferRef.current.seekTo(v);    },    [isReady],  );  // ── WavesurferPlayer event handlers  const handleReady = React.useCallback(    (ws: WaveSurfer) => {      wavesurferRef.current = ws;      ws.setVolume(defaultVolume);      if (autoPlay) ws.play();      setDuration(ws.getDuration());      setIsReady(true);    },    [defaultVolume, autoPlay],  );  const handlePlay = React.useCallback(() => {    setIsPlaying(true);    onPlay?.();  }, [onPlay]);  const handlePause = React.useCallback(() => {    setIsPlaying(false);    onPause?.();  }, [onPause]);  const handleFinish = React.useCallback(    (ws: WaveSurfer) => {      setIsPlaying(false);      onFinish?.();    },    [onFinish],  );  const handleTimeupdate = React.useCallback(    (ws: WaveSurfer) => {      const t = ws.getCurrentTime();      setCurrentTime(t);      onTimeUpdate?.(t, ws.getDuration());    },    [onTimeUpdate],  );  const handleSeeking = React.useCallback((ws: WaveSurfer) => {    setCurrentTime(ws.getCurrentTime());  }, []);  const handleDestroy = React.useCallback(() => {    wavesurferRef.current = null;    setIsReady(false);    setIsPlaying(false);    setCurrentTime(0);    setDuration(0);  }, []);  // ── Derived  const progress = duration > 0 ? currentTime / duration : 0;  // ── Render  return (    <Card      className={cn(        "w-full px-0 border-0 rounded-none bg-transparent",        className,      )}    >      <CardContent className=" border-0 px-0 space-y-3">        {title && (          <p className="text-sm font-medium text-foreground truncate">            {title}          </p>        )}        <div className="relative w-full rounded-sm overflow-hidden bg-muted/40">          {!isReady && (            <div              className="absolute inset-0 z-10 flex items-center justify-center bg-card/80 backdrop-blur-[2px]"              style={{ height: waveHeight ?? 64 }}            >              <Loader2 className="w-5 h-5 animate-spin text-muted-foreground" />            </div>          )}          <WavesurferPlayer            url={src}            waveColor={waveColor}            progressColor={progressColor}            height={waveHeight}            barWidth={barWidth}            barGap={barGap}            barRadius={barRadius}            minPxPerSec={minPxPerSec}            dragToSeek            onReady={handleReady}            onPlay={handlePlay}            onPause={handlePause}            onFinish={handleFinish}            onTimeupdate={handleTimeupdate}            onSeeking={handleSeeking}            onDestroy={handleDestroy}          />        </div>        <div className="flex items-center gap-2">          <span className="text-[11px] tabular-nums text-muted-foreground w-10 text-right shrink-0">            {formatTime(currentTime)}          </span>          <Slider            className="flex-1"            value={[progress]}            min={0}            max={1}            step={0.001}            disabled={!isReady}            onValueChange={handleSeek}          />          <span className="text-[11px] tabular-nums text-muted-foreground w-10 shrink-0">            {formatTime(duration)}          </span>        </div>        <div className="flex items-center justify-between gap-3">          <div className="flex items-center gap-1.5">            <Button              size="icon"              variant="ghost"              className="h-8 w-8 text-muted-foreground hover:text-foreground"              disabled={!isReady}              onClick={restart}              aria-label="Restart"            >              <RotateCcw size={15} />            </Button>            <Button              size="icon"              variant="secondary"              className="h-9 w-9"              disabled={!isReady}              onClick={togglePlay}              aria-label={isPlaying ? "Pause" : "Play"}            >              {isPlaying ? <Pause size={17} /> : <Play size={17} />}            </Button>          </div>          <div className="flex items-center gap-2 w-36">            <Button              size="icon"              variant="ghost"              className="h-7 w-7 shrink-0 text-muted-foreground hover:text-foreground"              onClick={toggleMute}              aria-label={isMuted ? "Unmute" : "Mute"}            >              {isMuted ? <VolumeX size={15} /> : <Volume2 size={15} />}            </Button>            <Slider              value={[isMuted ? 0 : volume]}              min={0}              max={1}              step={0.01}              onValueChange={handleVolume}              aria-label="Volume"            />          </div>        </div>      </CardContent>    </Card>  );}export default WavePlayer;