improve api for web package

packages/web/web.mjs

@@ -0,0 +1,64 @@
+export * from '@strudel.cycles/core';
+export * from '@strudel.cycles/webaudio';
+export * from '@strudel.cycles/soundfonts';
+export * from '@strudel.cycles/transpiler';
+export * from '@strudel.cycles/mini';
+export * from '@strudel.cycles/tonal';
+export * from '@strudel.cycles/webaudio';
+import { Pattern, evalScope, controls } from '@strudel.cycles/core';
+import { initAudioOnFirstClick, registerSynthSounds, webaudioScheduler } from '@strudel.cycles/webaudio';
+import { registerSoundfonts } from '@strudel.cycles/soundfonts';
+import { evaluate as _evaluate } from '@strudel.cycles/transpiler';
+import { miniAllStrings } from '@strudel.cycles/mini';
+
+// init logic
+export async function defaultPrebake() {
+  const loadModules = evalScope(
+    evalScope,
+    controls,
+    import('@strudel.cycles/core'),
+    import('@strudel.cycles/mini'),
+    import('@strudel.cycles/tonal'),
+    import('@strudel.cycles/webaudio'),
+    { hush, evaluate },
+  );
+  await Promise.all([loadModules, registerSynthSounds(), registerSoundfonts()]);
+}
+
+// when this function finishes, everything is initialized
+let initDone;
+
+let scheduler;
+export function init(options = {}) {
+  initAudioOnFirstClick();
+  miniAllStrings();
+  const { prebake, ...schedulerOptions } = options;
+
+  initDone = (async () => {
+    await defaultPrebake();
+    await prebake?.();
+  })();
+  scheduler = webaudioScheduler(schedulerOptions);
+}
+
+// this method will play the pattern on the default scheduler
+Pattern.prototype.play = function () {
+  if (!scheduler) {
+    throw new Error('.play: no scheduler found. Have you called init?');
+  }
+  initDone.then(() => {
+    scheduler.setPattern(this, true);
+  });
+  return this;
+};
+
+// stop playback
+export function hush() {
+  scheduler.stop();
+}
+
+// evaluate and play the given code using the transpiler
+export async function evaluate(code, autoplay = true) {
+  const { pattern } = await _evaluate(code);
+  autoplay && pattern.play();
+}