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annotate react_games/src/API_works/music_player.tsx @ 207:58d9b64d8dca

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Updated deployment script to include sqlite3
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 12:25:50 -0800
parents fb9bcd3145cb
children
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fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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1 import { useCallback, useEffect, useRef, useState } from "react";
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2
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3 const CHAPTERS: string[] = [
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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4 "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3",
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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5 "https://www.learningcontainer.com/wp-content/uploads/2020/02/Kalimba.mp3",
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6 "https://download.samplelib.com/mp3/sample-3s.mp3",
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7 ];
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8
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9 type AudioComponentProp = {
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10 srcUrl: string;
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11 onNext?: () => void;
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12 onPrev?: () => void;
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13 };
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14
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15 function fmt(t: number) {
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16 if (!isFinite(t)) return "0:00";
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17 const m = Math.floor(t / 60);
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18 const s = Math.floor(t % 60);
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19 return `${m}:${s.toString().padStart(2, "0")}`;
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20 }
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21
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22 const AudioComponent = ({ srcUrl, onNext, onPrev }: AudioComponentProp) => {
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23 const audioRef = useRef<HTMLAudioElement>(null);
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24
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25 const [isPlaying, setIsPlaying] = useState(false);
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26 const [current, setCurrent] = useState(0);
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27 const [duration, setDuration] = useState(0);
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28
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29 // If true, auto-play after src changes and can play.
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30 const autoplayNextRef = useRef(false);
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31
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32 // Wire up element events once.
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33 useEffect(() => {
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34 const el = audioRef.current;
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35 if (!el) return;
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36
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37 const onPlay = () => setIsPlaying(true);
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38 const onPause = () => setIsPlaying(false);
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39 const onTime = () => setCurrent(el.currentTime || 0);
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40 const onMeta = () => setDuration(isFinite(el.duration) ? el.duration : 0);
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41 const onEnded = () => {
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42 if (!onNext) return;
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43 autoplayNextRef.current = true; // keep playing the next track
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44 onNext();
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45 };
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46
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47 el.addEventListener("play", onPlay);
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48 el.addEventListener("pause", onPause);
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49 el.addEventListener("timeupdate", onTime);
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50 el.addEventListener("loadedmetadata", onMeta);
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51 el.addEventListener("ended", onEnded);
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52
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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53 // Prime initial state
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54 onMeta();
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55 onTime();
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56 setIsPlaying(!el.paused && !el.ended);
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57
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58 return () => {
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59 el.removeEventListener("play", onPlay);
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60 el.removeEventListener("pause", onPause);
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61 el.removeEventListener("timeupdate", onTime);
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62 el.removeEventListener("loadedmetadata", onMeta);
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63 el.removeEventListener("ended", onEnded);
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64 };
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65 }, [onNext]);
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66
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67 // When src changes, load and maybe auto-play when ready.
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68 useEffect(() => {
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69 const el = audioRef.current;
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70 if (!el) return;
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71
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72 el.load(); // pick up new src
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73
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74 const tryPlay = () => {
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75 if (autoplayNextRef.current) {
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76 autoplayNextRef.current = false;
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77 el.play().catch(() => {
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78 // Autoplay might be blocked; leave paused state as-is.
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79 });
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80 }
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81 };
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82
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83 // Play once ready (covers both cached and freshly loaded cases)
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84 el.addEventListener("canplay", tryPlay, { once: true });
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85 // In case it's already buffered:
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86 tryPlay();
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87
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88 // Reset progress immediately on new track
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89 setCurrent(0);
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90 }, [srcUrl]);
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91
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92 const toggle = useCallback(() => {
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93 const el = audioRef.current;
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94 if (!el) return;
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95 if (el.paused) el.play().catch(() => {});
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96 else el.pause();
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97 }, []);
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98
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99 const seek = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
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100 const el = audioRef.current;
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101 if (!el) return;
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102 el.currentTime = Number(e.target.value);
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103 }, []);
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104
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105 // Button handlers: set the autoplay flag so next track starts immediately.
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106 const handleNext = useCallback(() => {
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107 if (!onNext) return;
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108 autoplayNextRef.current = true; // user gesture → autoplay allowed
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109 onNext();
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110 }, [onNext]);
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111
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112 const handlePrev = useCallback(() => {
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113 if (!onPrev) return;
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114 autoplayNextRef.current = true;
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115 onPrev();
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116 }, [onPrev]);
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117
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118 const pct = duration > 0 ? (current / duration) * 100 : 0;
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119
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120 return (
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121 <>
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122 {/* remove "controls" if you want only custom UI */}
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123 <audio ref={audioRef} src={srcUrl} preload="metadata" />
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124 <div style={{ display: "flex", gap: 8, alignItems: "center", margin: "8px 0" }}>
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125 <button onClick={toggle}>{isPlaying ? "Pause" : "Play"}</button>
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126 <button onClick={handlePrev} disabled={!onPrev}>Prev</button>
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127 <button onClick={handleNext} disabled={!onNext}>Next</button>
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128 " <span style={{ marginLeft: 8, width: 56, textAlign: "right" }}>{fmt(current)}</span>",
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129 <input
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130 type="range"
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131 min={0}
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132 max={duration || 0}
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133 step={0.01}
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134 value={current}
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135 onChange={seek}
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136 style={{ flex: 1 }}
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137 />
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138 <span style={{ width: 56 }}>{fmt(duration)}</span>
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139 </div>
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140 {/* Optional thin progress bar */}
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141 <div style={{ height: 4, width: "100%", background: "#eee", borderRadius: 2 }}>
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142 <div style={{ height: "100%", width: `${pct}%`, background: "#999", borderRadius: 2 }} />
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143 </div>
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144 </>
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145 );
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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146 };
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147
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148 const MusicPlayer = () => {
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149 const [musicIndex, setMusicIndex] = useState<number>(0);
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150
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151 const onNext = useCallback(
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152 () => setMusicIndex((i) => Math.min(i + 1, CHAPTERS.length - 1)),
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153 []
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154 );
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155 const onPrev = useCallback(() => setMusicIndex((i) => Math.max(i - 1, 0)), []);
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156
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157 return (
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158 <AudioComponent
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159 srcUrl={CHAPTERS[musicIndex]}
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160 onNext={musicIndex === CHAPTERS.length - 1 ? undefined : onNext}
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161 onPrev={musicIndex === 0 ? undefined : onPrev}
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162 />
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163 );
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164 };
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165
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166 export {
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167 MusicPlayer,
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168 }