Files
MelodyMuse/src/components/InputPanel.tsx
T

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TypeScript

import { useState, type FormEvent, type KeyboardEvent } from "react";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import {
faCircleNotch,
faWandMagicSparkles,
faFire,
faMicrophone,
faMusic,
} from "@fortawesome/free-solid-svg-icons";
import type { InputValues, Language, Vocals } from "../lib/types";
import { formatElapsed, useElapsed } from "../lib/useElapsed";
import { randomStyle } from "../lib/llm";
import { useI18n } from "../lib/i18n";
export type { InputValues };
const LANGUAGES: { value: Language; label: string }[] = [
{ value: "English", label: "English" },
{ value: "Deutsch", label: "Deutsch" },
{ value: "Español", label: "Español" },
{ value: "Français", label: "Français" },
{ value: "Italiano", label: "Italiano" },
{ value: "Português", label: "Português" },
{ value: "Polski", label: "Polski" },
{ value: "Czech", label: "Čeština" },
{ value: "Other", label: "Other…" },
];
// Curated "Surprise me" pairs — coherent idea + matching style
const SURPRISE_PAIRS: { idea: string; style: string; mood: string; vocals: Vocals }[] = [
{ idea: "A melancholic lo-fi house beat for a rainy Sunday morning", style: "lo-fi, downtempo, warm vinyl crackle, 85 BPM", mood: "melancholic", vocals: "instrumental" },
{ idea: "An epic orchestral fantasy theme for a dragon rider", style: "cinematic orchestra, soaring strings, choir, 120 BPM", mood: "epic", vocals: "instrumental" },
{ idea: "A dreamy synthwave love song about neon city nights", style: "synthwave, retro arpeggios, lush reverb, 100 BPM", mood: "dreamy", vocals: "vocals" },
{ idea: "A summer beach pop anthem with a massive singalong chorus", style: "upbeat pop, electric guitar, catchy hooks, 128 BPM", mood: "euphoric", vocals: "vocals" },
{ idea: "A tense cinematic underscore for a space station emergency", style: "dark ambient, pulsing synths, tension pads, 90 BPM", mood: "tense", vocals: "instrumental" },
{ idea: "A jazzy bossa nova track about sipping coffee in Paris", style: "bossa nova, acoustic guitar, warm brass, 110 BPM", mood: "relaxed", vocals: "vocals" },
{ idea: "A dark folk ballad about a lighthouse keeper lost at sea", style: "dark folk, acoustic guitar, haunting vocals, 72 BPM", mood: "longing", vocals: "vocals" },
{ idea: "A bouncy chiptune adventure theme for a retro platformer", style: "chiptune, 8-bit, NES style, upbeat, 140 BPM", mood: "playful", vocals: "instrumental" },
];
// Curated "Go crazy" pairs — wild, absurd, unexpected combos
const CRAZY_PAIRS: { idea: string; style: string; mood: string; vocals: Vocals }[] = [
{ idea: "A death metal ode to a sentient washing machine who dreams of becoming a DJ", style: "death metal, heavy blast beats, distorted guitar, 180 BPM", mood: "aggressive", vocals: "vocals" },
{ idea: "An operatic trap banger about a medieval wizard discovering TikTok", style: "operatic trap, 808s, harpsichord, 140 BPM", mood: "chaotic", vocals: "vocals" },
{ idea: "A romantic waltz between a robot and a cactus on Mars", style: "classical waltz, electronic glitch, orchestral, 90 BPM", mood: "bittersweet", vocals: "instrumental" },
{ idea: "A gospel choir celebrating the invention of bubble wrap", style: "gospel, full choir, claps, euphoric brass, 120 BPM", mood: "joyful", vocals: "vocals" },
{ idea: "An avant-garde jazz piece where all instruments are kitchen utensils", style: "experimental jazz, freeform, atonal, 0 BPM (undefined)", mood: "chaotic", vocals: "instrumental" },
{ idea: "A synthpop ballad about a time-traveling accountant in ancient Rome", style: "80s synthpop, catchy arpeggios, reverb, 118 BPM", mood: "quirky", vocals: "vocals" },
{ idea: "A Viking drinking song remixed by an alien DJ", style: "folk metal, hypnotic alien synths, epic choir, 160 BPM", mood: "wild", vocals: "vocals" },
{ idea: "A lullaby for a grumpy dragon who cannot fall asleep", style: "ambient lullaby, gentle bells, warm pads, 60 BPM", mood: "tender", vocals: "vocals" },
];
interface InputPanelProps {
values: InputValues;
onChange: (next: InputValues) => void;
onSubmit: () => void;
loading: boolean;
disabled?: boolean;
cancelButton?: React.ReactNode;
}
export function InputPanel({
values,
onChange,
onSubmit,
loading,
disabled,
cancelButton,
}: InputPanelProps) {
const [styleLoading, setStyleLoading] = useState<null | "normal" | "crazy">(null);
const elapsed = useElapsed(loading);
const { t } = useI18n();
const set = <K extends keyof InputValues>(key: K, value: InputValues[K]) =>
onChange({ ...values, [key]: value });
const canSubmit = !loading && !disabled && values.idea.trim().length > 0;
const submit = (e?: FormEvent) => {
e?.preventDefault();
if (canSubmit) onSubmit();
};
const onCmdEnter = (e: KeyboardEvent<HTMLInputElement | HTMLTextAreaElement>) => {
if ((e.metaKey || e.ctrlKey) && e.key === "Enter") {
e.preventDefault();
submit();
}
};
// "Surprise me" fills style. If idea is empty, fills a random idea too.
const handleSurpriseMe = async () => {
if (styleLoading) return;
const hasIdea = values.idea.trim().length > 0;
const ex = SURPRISE_PAIRS[Math.floor(Math.random() * SURPRISE_PAIRS.length)];
const ideaToUse = hasIdea ? values.idea : ex.idea;
const ctrl = new AbortController();
setStyleLoading("normal");
try {
const style = await randomStyle("normal", ctrl.signal, ideaToUse);
onChange({
...values,
idea: ideaToUse,
style_hint: style,
mood: hasIdea ? values.mood : ex.mood,
vocals: hasIdea ? values.vocals : ex.vocals
});
} catch (err) {
if (err instanceof DOMException && err.name === "AbortError") return;
onChange({
...values,
idea: ideaToUse,
style_hint: hasIdea ? values.style_hint : ex.style,
mood: hasIdea ? values.mood : ex.mood,
vocals: hasIdea ? values.vocals : ex.vocals
});
} finally {
setStyleLoading((curr) => (curr === "normal" ? null : curr));
}
};
// "Go crazy" fills style wildly. If idea is empty, fills a wild idea too.
const handleGoCrazy = async () => {
if (styleLoading) return;
const hasIdea = values.idea.trim().length > 0;
const ex = CRAZY_PAIRS[Math.floor(Math.random() * CRAZY_PAIRS.length)];
const ideaToUse = hasIdea ? values.idea : ex.idea;
const ctrl = new AbortController();
setStyleLoading("crazy");
try {
const style = await randomStyle("crazy", ctrl.signal, ideaToUse);
onChange({
...values,
idea: ideaToUse,
style_hint: style,
mood: hasIdea ? values.mood : ex.mood,
vocals: hasIdea ? values.vocals : ex.vocals
});
} catch (err) {
if (err instanceof DOMException && err.name === "AbortError") return;
onChange({
...values,
idea: ideaToUse,
style_hint: hasIdea ? values.style_hint : ex.style,
mood: hasIdea ? values.mood : ex.mood,
vocals: hasIdea ? values.vocals : ex.vocals
});
} finally {
setStyleLoading((curr) => (curr === "crazy" ? null : curr));
}
};
const anyLoading = styleLoading !== null;
return (
<form onSubmit={submit} className="flex flex-col gap-4 h-full">
{/* Music Idea */}
<div className="flex flex-col gap-1.5">
<label htmlFor="idea" className="text-xs font-bold uppercase tracking-wider text-fg-muted">
{t.musicIdea}
</label>
<textarea
id="idea"
value={values.idea}
onChange={(e) => set("idea", e.target.value)}
onKeyDown={onCmdEnter}
placeholder={t.placeholderIdea}
className="textarea text-[14px] leading-relaxed scrollbar-thin"
style={{ minHeight: 90, resize: "vertical" }}
required
/>
{/* Example / Surprise / Crazy buttons */}
<div className="flex flex-wrap gap-2 pt-0.5">
{/* Removed Try an Example button */}
<button
type="button"
onClick={handleSurpriseMe}
disabled={anyLoading}
className="btn-fun border-accent-secondary/50 text-accent-secondary hover:bg-accent-secondary/10 bg-accent-secondary/5"
>
{styleLoading === "normal"
? <FontAwesomeIcon icon={faCircleNotch} spin className="w-3 h-3" />
: <FontAwesomeIcon icon={faWandMagicSparkles} className="w-3 h-3" />}
{t.surpriseMe}
</button>
<button
type="button"
onClick={handleGoCrazy}
disabled={anyLoading}
className="btn-fun border-rose-500/50 text-rose-400 hover:bg-rose-500/10 bg-rose-500/5"
>
{styleLoading === "crazy"
? <FontAwesomeIcon icon={faCircleNotch} spin className="w-3 h-3" />
: <FontAwesomeIcon icon={faFire} className="w-3 h-3" />}
{t.goCrazy}
</button>
</div>
</div>
{/* Divider */}
<div className="border-t border-border" />
{/* Options Grid */}
<div className="grid grid-cols-2 gap-3">
{/* Language */}
<div className="flex flex-col gap-1.5">
<label htmlFor="language" className="text-xs font-bold uppercase tracking-wider text-fg-muted">
{t.language}
</label>
<select
id="language"
value={values.language}
onChange={(e) => set("language", e.target.value as Language)}
className="input h-[36px] py-0 text-sm"
>
{LANGUAGES.map((l) => (
<option key={l.value} value={l.value}>{l.label}</option>
))}
</select>
{values.language === "Other" && (
<input
type="text"
className="input h-[36px] text-sm"
placeholder="e.g. 日本語"
value={values.customLanguage}
onChange={(e) => set("customLanguage", e.target.value)}
/>
)}
</div>
{/* Mood */}
<div className="flex flex-col gap-1.5">
<label htmlFor="mood" className="text-xs font-bold uppercase tracking-wider text-fg-muted">
{t.mood} <span className="normal-case font-normal opacity-60 text-[10px]">{t.optional}</span>
</label>
<input
id="mood"
type="text"
placeholder={t.placeholderMood}
value={values.mood}
onChange={(e) => set("mood", e.target.value)}
className="input h-[36px] text-sm"
/>
</div>
</div>
{/* Style */}
<div className="flex flex-col gap-1.5">
<label htmlFor="style_hint" className="text-xs font-bold uppercase tracking-wider text-fg-muted">
{t.musicStyle} <span className="normal-case font-normal opacity-60 text-[10px]">{t.optional}</span>
</label>
<input
id="style_hint"
type="text"
placeholder={t.placeholderStyle}
value={values.style_hint}
onChange={(e) => set("style_hint", e.target.value)}
onKeyDown={onCmdEnter}
className="input h-[36px] text-sm"
/>
</div>
{/* Vocals Toggle */}
<div className="flex flex-col gap-1.5">
<label className="text-xs font-bold uppercase tracking-wider text-fg-muted">{t.vocals}</label>
<div className="inline-flex rounded-xl border border-border bg-bg h-[36px] p-0.5 w-full">
<button
type="button"
onClick={() => set("vocals", "vocals")}
className={`flex-1 flex items-center justify-center gap-2 rounded-lg text-xs font-bold transition-all duration-150 ${
values.vocals === "vocals"
? "gradient-bg text-white shadow-md"
: "text-fg-muted hover:text-fg"
}`}
title={t.vocalsOption}
>
<FontAwesomeIcon icon={faMicrophone} />
<span>{t.vocalsOption}</span>
</button>
<button
type="button"
onClick={() => set("vocals", "instrumental")}
className={`flex-1 flex items-center justify-center gap-2 rounded-lg text-xs font-bold transition-all duration-150 ${
values.vocals === "instrumental"
? "gradient-bg text-white shadow-md"
: "text-fg-muted hover:text-fg"
}`}
title={t.instrumentalOption}
>
<FontAwesomeIcon icon={faMusic} />
<span>{t.instrumentalOption}</span>
</button>
</div>
</div>
{/* Spacer to push generate button down */}
<div className="flex-1" />
{/* Generate Button */}
<div className="flex flex-col gap-2">
<button
type="submit"
disabled={!canSubmit}
className="w-full h-[46px] rounded-xl text-sm font-bold text-white shadow-lg transition-all duration-150
disabled:opacity-40 disabled:cursor-not-allowed disabled:shadow-none
flex items-center justify-center gap-2 gradient-bg hover:brightness-110 hover:-translate-y-0.5
active:brightness-95 active:translate-y-0"
>
{loading ? (
<>
<FontAwesomeIcon icon={faCircleNotch} spin className="w-4 h-4" />
{t.generating} {formatElapsed(elapsed)}
</>
) : (
<>
<FontAwesomeIcon icon={faWandMagicSparkles} className="w-4 h-4" />
{t.generateAssets}
</>
)}
</button>
{loading && cancelButton}
</div>
</form>
);
}