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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | /** * React hook for Euclid construction music via Strudel. * * Manages Strudel lifecycle, throttled pattern evaluation, one-shot * chimes/flourishes, and playback state. * * Module-level Strudel state survives component unmount/remount so music * persists across proposition navigation. */ 'use client' import { useCallback, useEffect, useRef, useState, useMemo } from 'react' import type { ConstructionState } from '../types' import type { FactStore } from '../engine/factStore' import { geometryToPattern, intersectionChimePattern, completionFlourishPattern, getPointBounds, } from './geometryToPattern' // Declare global Strudel functions (made available after initStrudel) declare global { function evaluate(code: string): Promise<unknown> function hush(): void } // ── Module-level Strudel state (survives unmount/remount) ── let strudelInitialized = false let strudelInitializing = false let strudelRepl: { stop?: () => void } | null = null interface UseEuclidMusicOptions { constructionRef: React.MutableRefObject<ConstructionState> factStoreRef: React.MutableRefObject<FactStore> isComplete: boolean } export interface UseEuclidMusicReturn { isPlaying: boolean toggle: () => void notifyChange: () => void notifyIntersection: (x: number, y: number) => void notifyCompletion: () => void } /** Chime one-shot duration in ms */ const CHIME_DURATION = 2000 /** Flourish one-shot duration in ms */ const FLOURISH_DURATION = 4000 /** Throttle interval for pattern updates */ const THROTTLE_MS = 80 async function ensureStrudelInitialized(): Promise<boolean> { if (strudelInitialized) return true if (strudelInitializing) return false strudelInitializing = true try { // @ts-expect-error - @strudel/web doesn't have type declarations const { initStrudel, samples } = await import('@strudel/web') const repl = await initStrudel({ prebake: () => Promise.all([ samples('github:switchangel/pad'), samples('github:tidalcycles/dirt-samples'), ]), }) strudelRepl = repl strudelInitialized = true return true } catch (err) { console.error('[EuclidMusic] Initialization failed:', err) return false } finally { strudelInitializing = false } } export function useEuclidMusic({ constructionRef, factStoreRef, isComplete, }: UseEuclidMusicOptions): UseEuclidMusicReturn { const [isPlaying, setIsPlaying] = useState(false) const isPlayingRef = useRef(isPlaying) // Throttle state const lastUpdateRef = useRef(0) const trailingTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null) // One-shot state const oneShotTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null) const currentPatternRef = useRef<string>('') // Track isComplete for the pattern generator const isCompleteRef = useRef(isComplete) isCompleteRef.current = isComplete // Track mounted state to avoid setState after unmount const mountedRef = useRef(true) // Generate and evaluate the current construction pattern const evaluateCurrentPattern = useCallback(async () => { if (!isPlayingRef.current || !strudelInitialized) return const pattern = geometryToPattern( constructionRef.current, factStoreRef.current, isCompleteRef.current ) currentPatternRef.current = pattern try { await evaluate(pattern) } catch (err) { console.error('[EuclidMusic] Pattern evaluation failed:', err) } }, [constructionRef, factStoreRef]) // Toggle playback const toggle = useCallback(async () => { if (isPlayingRef.current) { // Stop try { if (typeof hush === 'function') hush() } catch { /* ignore */ } isPlayingRef.current = false if (mountedRef.current) setIsPlaying(false) } else { // Start — ensure Strudel is initialized (first toggle requires user gesture) const ready = await ensureStrudelInitialized() if (!ready) return isPlayingRef.current = true if (mountedRef.current) setIsPlaying(true) await evaluateCurrentPattern() } }, [evaluateCurrentPattern]) useEffect(() => { mountedRef.current = true return () => { mountedRef.current = false // Clear timers only — don't kill Strudel or reset module state if (trailingTimerRef.current) clearTimeout(trailingTimerRef.current) if (oneShotTimerRef.current) clearTimeout(oneShotTimerRef.current) // Silence current playback so there's no stale audio between propositions, // but leave Strudel initialized for the next mount try { if (typeof hush === 'function') hush() } catch { /* ignore */ } } }, []) // Throttled pattern update (leading + trailing edge) const notifyChange = useCallback(() => { if (!isPlayingRef.current || !strudelInitialized) return const now = Date.now() if (trailingTimerRef.current) { clearTimeout(trailingTimerRef.current) trailingTimerRef.current = null } if (now - lastUpdateRef.current >= THROTTLE_MS) { // Leading edge lastUpdateRef.current = now evaluateCurrentPattern() } else { // Schedule trailing edge const remaining = THROTTLE_MS - (now - lastUpdateRef.current) trailingTimerRef.current = setTimeout(() => { lastUpdateRef.current = Date.now() trailingTimerRef.current = null evaluateCurrentPattern() }, remaining) } }, [evaluateCurrentPattern]) // One-shot intersection chime const notifyIntersection = useCallback( (x: number, y: number) => { if (!isPlayingRef.current || !strudelInitialized) return const { minX, maxX } = getPointBounds(constructionRef.current) const chime = intersectionChimePattern(x, y, minX, maxX) const main = currentPatternRef.current const stacked = main ? `stack(\n ${main},\n ${chime}\n)` : chime // Clear any existing one-shot timer if (oneShotTimerRef.current) { clearTimeout(oneShotTimerRef.current) } evaluate(stacked).catch((err) => console.error('[EuclidMusic] Chime evaluation failed:', err)) // Remove chime after decay oneShotTimerRef.current = setTimeout(() => { oneShotTimerRef.current = null if (isPlayingRef.current) { evaluateCurrentPattern() } }, CHIME_DURATION) }, [constructionRef, evaluateCurrentPattern] ) // Completion flourish const notifyCompletion = useCallback(() => { if (!isPlayingRef.current || !strudelInitialized) return // Update the main pattern with isComplete=true const main = geometryToPattern(constructionRef.current, factStoreRef.current, true) currentPatternRef.current = main const flourish = completionFlourishPattern() const stacked = `stack(\n ${main},\n ${flourish}\n)` if (oneShotTimerRef.current) { clearTimeout(oneShotTimerRef.current) } evaluate(stacked).catch((err) => console.error('[EuclidMusic] Flourish evaluation failed:', err) ) oneShotTimerRef.current = setTimeout(() => { oneShotTimerRef.current = null if (isPlayingRef.current) { evaluateCurrentPattern() } }, FLOURISH_DURATION) }, [constructionRef, factStoreRef, evaluateCurrentPattern]) return useMemo( () => ({ isPlaying, toggle, notifyChange, notifyIntersection, notifyCompletion, }), [isPlaying, toggle, notifyChange, notifyIntersection, notifyCompletion] ) } |