REFACTOR frontend

frontend/src/components/video/Playbar.tsx

@@ -0,0 +1,101 @@
+import { useEffect, useState} from "react";
+import { Volume1, Volume2, VolumeX, Play, Pause } from 'lucide-react';
+import clsx from 'clsx';
+import type { VideoMetadata } from "../../utils/types.ts";
+
+
+type Props = {
+    video: HTMLVideoElement | null;
+    videoMetadata: VideoMetadata;
+    className?: string;
+};
+
+function formatTime(seconds: number): string {
+    const h = Math.floor(seconds / 3600);
+    const m = Math.floor((seconds % 3600) / 60);
+    const s = Math.floor(seconds % 60);
+
+    const padded = (n: number) => n.toString().padStart(2, '0');
+
+    if (h > 0) {
+        return `${h}:${padded(m)}:${padded(s)}`;
+    } else {
+        return `${m}:${padded(s)}`;
+    }
+}
+
+export default function Playbar({ video, videoMetadata, className }: Props) {
+    const [isPlaying, setIsPlaying] = useState(false);
+    const [volume, setVolume] = useState(100);
+
+    const togglePlay = () => {
+        if (!video) return;
+
+        if (video.paused) {
+            video.play();
+            setIsPlaying(true);
+        } else {
+            video.pause();
+            setIsPlaying(false);
+        }
+    };
+
+    let Icon;
+    // update icon
+    if (volume == 0) {
+        Icon = VolumeX;
+    } else if (volume < 50) {
+        Icon = Volume1;
+    } else {
+        Icon = Volume2;
+    }
+
+    const updateVolume = (e: React.ChangeEvent<HTMLInputElement>) => {
+        if (!video) return;
+
+        let volume = parseInt(e.target.value)
+
+        video.volume = volume / 100;
+        setVolume(volume);
+    }
+
+    // Sync state with video element changes (e.g., if someone presses spacebar or clicks on the video)
+    useEffect(() => {
+        if (!video) return;
+
+        const handlePlay = () => setIsPlaying(true);
+        const handlePause = () => setIsPlaying(false);
+
+        video.addEventListener("play", handlePlay);
+        video.addEventListener("pause", handlePause);
+
+        return () => {
+            video.removeEventListener("play", handlePlay);
+            video.removeEventListener("pause", handlePause);
+        };
+    }, [video]);
+
+    return (
+        <div className={clsx("flex justify-between items-center p-2 rounded-lg", className)}>
+            <div className={"flex gap-1"}>
+                <Icon size={24} />
+                <input
+                    type='range'
+                    min={0}
+                    max={100}
+                    onChange={updateVolume}
+                    value={volume}
+                    className={"w-20"}
+                />
+            </div>
+            <button onClick={togglePlay}>
+                {isPlaying ? <Pause size={24} /> : <Play size={24} />}
+            </button>
+            {videoMetadata.endPoint &&
+                <label>
+                    {formatTime(video?.currentTime ?? 0)} / {formatTime(videoMetadata.endPoint)}
+                </label>
+            }
+        </div>
+    );
+}