background playback

src/app/music/_components/MusicMiniPlayer.tsx

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+'use client'
+
+import { useState } from "react";
+import { Music } from "lucide-react";
+import {
+	Drawer,
+	DrawerContent,
+	DrawerHeader,
+	DrawerTitle,
+	DrawerTrigger,
+} from "~/components/ui/drawer";
+import { Slider } from "~/components/ui/slider";
+import { useMusicPlayer } from "./MusicPlayerProvider";
+import PlayerControls from "./PlayerControls";
+
+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")}`;
+}
+
+/**
+ * Global, persistent mini-player: a floating button (shown once something is
+ * loaded) that opens a drawer with the transport controls and a scrubber, so
+ * playback can be controlled from any page while it keeps running in the
+ * background.
+ */
+export default function MusicMiniPlayer() {
+	const { currentTrack, isPlaying, currentTime, duration, seek } = useMusicPlayer();
+	const [open, setOpen] = useState(false);
+
+	if (!currentTrack) return null;
+
+	return (
+		<Drawer open={open} onOpenChange={setOpen}>
+			<DrawerTrigger asChild>
+				<button
+					type="button"
+					aria-label="Open player"
+					className="fixed bottom-4 left-4 z-40 flex max-w-[60vw] items-center gap-2 rounded-full border bg-background/80 px-4 py-2 shadow-lg backdrop-blur-md transition-colors hover:bg-background"
+				>
+					<Music className={isPlaying ? "animate-pulse" : ""} />
+					<span className="truncate text-sm">{currentTrack.title}</span>
+				</button>
+			</DrawerTrigger>
+			<DrawerContent>
+				<DrawerHeader>
+					<DrawerTitle>{currentTrack.title}</DrawerTitle>
+				</DrawerHeader>
+				<div className="mx-auto flex w-full max-w-md flex-col gap-4 px-4 pb-8">
+					<div className="flex items-center gap-2">
+						<span className="w-10 text-right font-mono text-xs text-muted-foreground tabular-nums">
+							{formatTime(currentTime)}
+						</span>
+						<Slider
+							className="flex-1"
+							min={0}
+							max={duration || 1}
+							step={0.1}
+							value={[currentTime]}
+							onValueChange={([v]) => seek(v ?? 0)}
+						/>
+						<span className="w-10 font-mono text-xs text-muted-foreground tabular-nums">
+							{formatTime(duration)}
+						</span>
+					</div>
+					<PlayerControls />
+				</div>
+			</DrawerContent>
+		</Drawer>
+	);
+}