convert flacs to aac for streaming

src/app/music/_components/AudioPlayer.tsx

@@ -0,0 +1,125 @@
+'use client'
+
+import { useRef, useState } from "react";
+import { Download, Loader2, Pause, Play } from "lucide-react";
+import { Slider } from "~/components/ui/slider";
+import { Button } from "~/components/ui/button";
+import { toast } from "sonner";
+
+function formatTime(seconds: number) {
+	if (!Number.isFinite(seconds)) return "0:00";
+	const m = Math.floor(seconds / 60);
+	const s = Math.floor(seconds % 60);
+	return `${m}:${s.toString().padStart(2, "0")}`;
+}
+
+export default function AudioPlayer(props: {
+	/** Streaming-friendly source the player actually plays. */
+	src: string;
+	/** Original high-quality file offered via the download button. */
+	downloadUrl: string;
+	downloadName: string;
+}) {
+	const audioRef = useRef<HTMLAudioElement>(null);
+	const [playing, setPlaying] = useState(false);
+	const [current, setCurrent] = useState(0);
+	const [duration, setDuration] = useState(0);
+	const [seeking, setSeeking] = useState(false);
+	const [downloading, setDownloading] = useState(false);
+
+	function togglePlay() {
+		const audio = audioRef.current;
+		if (!audio) return;
+		if (audio.paused) {
+			audio.play();
+		} else {
+			audio.pause();
+		}
+	}
+
+	async function handleDownload() {
+		setDownloading(true);
+		try {
+			// The download file is cross-origin, so the <a download> attribute is
+			// ignored — fetch it as a blob to force a real download.
+			const res = await fetch(props.downloadUrl);
+			if (!res.ok) throw new Error(`HTTP ${res.status}`);
+			const blob = await res.blob();
+			const url = URL.createObjectURL(blob);
+			const a = document.createElement("a");
+			a.href = url;
+			a.download = props.downloadName;
+			document.body.appendChild(a);
+			a.click();
+			a.remove();
+			URL.revokeObjectURL(url);
+		} catch (e) {
+			toast(`Download failed: ${e instanceof Error ? e.message : "unknown error"}`);
+		} finally {
+			setDownloading(false);
+		}
+	}
+
+	return (
+		<div className="flex items-center gap-3 rounded-lg border bg-transparent px-3 py-2">
+			<audio
+				ref={audioRef}
+				src={props.src}
+				preload="metadata"
+				onPlay={() => setPlaying(true)}
+				onPause={() => setPlaying(false)}
+				onLoadedMetadata={(e) => setDuration(e.currentTarget.duration)}
+				onTimeUpdate={(e) => {
+					if (!seeking) setCurrent(e.currentTarget.currentTime);
+				}}
+				onEnded={() => setPlaying(false)}
+			/>
+
+			<Button
+				type="button"
+				size="icon"
+				variant="ghost"
+				aria-label={playing ? "Pause" : "Play"}
+				onClick={togglePlay}
+			>
+				{playing ? <Pause /> : <Play />}
+			</Button>
+
+			<span className="w-10 shrink-0 text-right font-mono text-xs text-muted-foreground tabular-nums">
+				{formatTime(current)}
+			</span>
+
+			<Slider
+				className="flex-1"
+				min={0}
+				max={duration || 1}
+				step={0.1}
+				value={[current]}
+				onValueChange={([v]) => {
+					setSeeking(true);
+					setCurrent(v ?? 0);
+				}}
+				onValueCommit={([v]) => {
+					if (audioRef.current) audioRef.current.currentTime = v ?? 0;
+					setSeeking(false);
+				}}
+			/>
+
+			<span className="w-10 shrink-0 font-mono text-xs text-muted-foreground tabular-nums">
+				{formatTime(duration)}
+			</span>
+
+			<Button
+				type="button"
+				size="icon"
+				variant="ghost"
+				aria-label="Download lossless file"
+				title="Download lossless file"
+				disabled={downloading}
+				onClick={handleDownload}
+			>
+				{downloading ? <Loader2 className="animate-spin" /> : <Download />}
+			</Button>
+		</div>
+	);
+}