feat(music): refactor and basic cava implementation

src/App.tsx

@@ -1,10 +1,9 @@
 import { BrowserRouter } from "react-router-dom";
-import { MusicPlayer } from "./components/MusicPlayer";
 import { Kitty } from "./components/Kitty";
 import { AppContextProvider } from "./context/AppContext";
 import { Waybar } from "./components/Waybar/Waybar";
-import { MusicVisualizer } from "./components/MusicVisualizer";
 import { useState } from "react";
+import { Music } from "./components/Music/Music";
 
 function App() {
   const [clicked, setClicked] = useState(false);
@@ -23,13 +22,7 @@ function App() {
             <Kitty className="flex-1"></Kitty>
 
             <div className="flex h-[142px] gap-3">
-              <Kitty className="flex-1 select-none">
+              <Music />{" "}
-                <MusicPlayer />
-              </Kitty>
-
-              <Kitty className="flex-1">
-                <MusicVisualizer />
-              </Kitty>
             </div>
           </main>
         ) : (

src/components/Music/Cava.tsx

@@ -0,0 +1,82 @@
+import { Fragment, useRef, useEffect, useState } from "react";
+import { ProgressBar, Group, useFrame, useTerminal } from "react-dom-curse";
+import { theme } from "~/utils/theme";
+
+export const Cava = () => {
+  const { width } = useTerminal();
+
+  const audioContext = useRef(new AudioContext());
+  const analyser = useRef(audioContext.current.createAnalyser());
+  const bufferLength = useRef(analyser.current.frequencyBinCount);
+  const dataArray = useRef(new Uint8Array(bufferLength.current));
+  const [barHeights, setBarHeights] = useState(
+    new Array<number>(Math.round(width / 3)).fill(0),
+  );
+
+  useEffect(() => {
+    const audioElement = document.querySelector("audio");
+    if (!audioElement) return;
+
+    const audioSource =
+      audioContext.current.createMediaElementSource(audioElement);
+    audioSource.connect(analyser.current);
+    analyser.current.connect(audioContext.current.destination);
+    audioElement.play();
+
+    return () => {
+      audioSource.disconnect();
+      analyser.current.disconnect();
+    };
+  }, []);
+
+  useFrame(() => {
+    analyser.current.getByteFrequencyData(dataArray.current);
+
+    const barCount = Math.floor(width / 3);
+    const barHeights = [];
+
+    for (let i = 0; i < barCount; i++) {
+      const startIndex = Math.floor((i / barCount) * bufferLength.current);
+      const endIndex = Math.floor(((i + 1) / barCount) * bufferLength.current);
+      const slice = dataArray.current.slice(startIndex, endIndex);
+      const sum = slice.reduce((acc, val) => acc + val, 0);
+      const average = sum / slice.length;
+      barHeights.push(average);
+    }
+
+    setBarHeights(barHeights);
+  });
+
+  return (
+    <Group
+      x={0}
+      y={0}
+      width={width}
+      height={5}
+      style={{ foreground: theme.white }}
+    >
+      {barHeights.map((height, x) => (
+        <Fragment key={x}>
+          <ProgressBar
+            x={x * 3}
+            y={4}
+            size={5}
+            min={0}
+            max={255}
+            value={height}
+            orientation="top"
+          />
+          <ProgressBar
+            x={x * 3 + 1}
+            y={4}
+            size={5}
+            min={0}
+            max={255}
+            value={height}
+            orientation="top"
+          />
+        </Fragment>
+      ))}
+    </Group>
+  );
+};

src/components/Music/Music.tsx

@@ -0,0 +1,49 @@
+import { useEffect, useRef, useState } from "react";
+import { parseBlob, type IAudioMetadata } from "music-metadata-browser";
+
+import song from "/audio/colorful-flowers.mp3";
+import { Kitty } from "../Kitty";
+import { Cava } from "./Cava";
+import { SpotifyPlayer } from "./SpotifyPlayer";
+
+export const Music = () => {
+  const [metadata, setMetadata] = useState<IAudioMetadata>();
+  const [currentTime, setCurrentTime] = useState(0);
+  const audio = useRef<HTMLAudioElement>(null);
+
+  const handleTimeUpdate = () => {
+    setCurrentTime(audio.current?.currentTime ?? 0);
+  };
+
+  useEffect(() => {
+    if (metadata) return;
+
+    void fetch(song)
+      .then(r => r.blob())
+      .then(b => parseBlob(b))
+      .then(setMetadata);
+  }, [metadata]);
+
+  return (
+    <>
+      <audio ref={audio} src={song} onTimeUpdate={handleTimeUpdate} loop />
+      {metadata && audio.current && (
+        <>
+          <Kitty className="flex-1 select-none">
+            <SpotifyPlayer
+              title={metadata.common.title ?? "Unknown"}
+              artist={metadata.common.artist ?? "Unknown"}
+              album={metadata.common.album ?? "Unknown"}
+              played={currentTime}
+              duration={audio.current.duration}
+            />
+          </Kitty>
+
+          <Kitty className="flex-1">
+            <Cava />
+          </Kitty>
+        </>
+      )}
+    </>
+  );
+};

src/components/Music/SpotifyPlayer.tsx

@@ -0,0 +1,79 @@
+import { useEffect } from "react";
+import { Bar, Frame, Group, Text, useTerminal } from "react-dom-curse";
+import { theme } from "~/utils/theme";
+
+const formatDurationMSS = (duration: number) => {
+  duration = Math.floor(duration);
+
+  const minutes = Math.floor(duration / 60);
+  const seconds = duration % 60;
+
+  return `${minutes}:${seconds.toString().padStart(2, "0")}`;
+};
+
+export const SpotifyPlayer = (props: {
+  title: string;
+  artist: string;
+  album: string;
+  played: number;
+  duration: number;
+}) => {
+  const { width } = useTerminal();
+
+  const time = `${formatDurationMSS(props.played)}/${formatDurationMSS(
+    props.duration,
+  )}`;
+
+  return (
+    <Group
+      x={0}
+      y={0}
+      width={width}
+      height={5}
+      style={{ foreground: theme.white }}
+    >
+      <Frame x={0} y={0} width={width} height={5} border="single">
+        <Text x={0} y={0} style={{ foreground: theme.cyan, bold: true }}>
+          {props.title} · {props.artist}
+        </Text>
+        <Text x={0} y={1} style={{ foreground: theme.yellow }}>
+          {props.album}
+        </Text>
+
+        <Group x={0} y={2} width={width} height={1}>
+          <Bar
+            x={0}
+            y={0}
+            style={{
+              foreground: theme.green,
+              background: "#55576d",
+              bold: true,
+            }}
+            char=" "
+            size={width}
+            direction="right"
+          />
+          <Bar
+            x={0}
+            y={0}
+            style={{
+              foreground: "#55576d",
+              background: theme.green,
+              bold: true,
+            }}
+            char=" "
+            size={width * (props.played / props.duration)}
+            direction="right"
+          />
+          <Text x={Math.floor(width / 2 - time.length / 2 - 1)} y={0}>
+            {time}
+          </Text>
+        </Group>
+      </Frame>
+
+      <Text x={1} y={0} style={{ foreground: theme.magenta }}>
+        {"Playback".substring(0, Math.min(8, width - 2))}
+      </Text>
+    </Group>
+  );
+};

src/components/MusicPlayer.tsx

@@ -1,106 +0,0 @@
-import { useEffect, useRef, useState } from "react";
-import { Bar, Frame, Group, Text, useTerminal } from "react-dom-curse";
-import { theme } from "~/utils/theme";
-import { parseBlob, type IAudioMetadata } from "music-metadata-browser";
-
-import song from "/audio/colorful-flowers.mp3";
-
-const formatDurationMSS = (duration: number) => {
-  duration = Math.floor(duration);
-
-  const minutes = Math.floor(duration / 60);
-  const seconds = duration % 60;
-
-  return `${minutes}:${seconds.toString().padStart(2, "0")}`;
-};
-
-export const MusicPlayer = () => {
-  const { width } = useTerminal();
-  const [metadata, setMetadata] = useState<IAudioMetadata>();
-
-  const audio = useRef<HTMLAudioElement>();
-  useEffect(() => {
-    if (audio.current) return;
-
-    audio.current = new Audio(song);
-
-    void fetch(song)
-      .then(r => r.blob())
-      .then(b => parseBlob(b))
-      .then(d => {
-        void audio.current?.play();
-        setMetadata(d);
-      });
-  }, []);
-
-  if (!audio.current) return null;
-
-  const played = audio.current.currentTime;
-  const duration = audio.current.duration;
-
-  const time = `${formatDurationMSS(played)}/${formatDurationMSS(duration)}`;
-
-  return (
-    <Group
-      x={0}
-      y={0}
-      width={width}
-      height={5}
-      style={{ foreground: theme.white }}
-    >
-      <Frame x={0} y={0} width={width} height={5} border="single">
-        {metadata ? (
-          <>
-            <Text x={0} y={0} style={{ foreground: theme.cyan, bold: true }}>
-              {metadata.common.title ?? "Unknown"} ·{" "}
-              {metadata.common.artist ?? "Unknown"}
-            </Text>
-            <Text x={0} y={1} style={{ foreground: theme.yellow }}>
-              {metadata.common.album ?? "Unknown"}
-            </Text>
-
-            <Group x={0} y={2} width={width} height={1}>
-              <Bar
-                x={0}
-                y={0}
-                style={{
-                  foreground: theme.green,
-                  background: "#55576d",
-                  bold: true,
-                }}
-                char=" "
-                size={width}
-                direction="horizontal"
-              />
-              <Bar
-                x={0}
-                y={0}
-                style={{
-                  foreground: "#55576d",
-                  background: theme.green,
-                  bold: true,
-                }}
-                char=" "
-                size={width * (played / duration)}
-                direction="horizontal"
-              />
-              <Text x={Math.floor(width / 2 - time.length / 2 - 1)} y={0}>
-                {time}
-              </Text>
-            </Group>
-          </>
-        ) : (
-          <>
-            <Text x={0} y={0}>
-              No playback found.
-            </Text>
-          </>
-        )}
-      </Frame>
-
-      <Text x={1} y={0} style={{ foreground: theme.magenta }}>
-        {"Playback".substring(0, Math.min(8, width - 2))}
-      </Text>
-    </Group>
-  );
-};

src/components/MusicVisualizer.tsx

@@ -1,5 +0,0 @@
-import { type FunctionComponent } from "react";
-
-export const MusicVisualizer: FunctionComponent = () => (
-  <div className="h-full w-full bg-red-500"></div>
-);