start packaging

packages/midi/midi.mjs

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+import { isNote } from 'tone';
+import _WebMidi from 'webmidi';
+import { Pattern as _Pattern } from '../core/strudel.mjs';
+import * as Tone from 'tone';
+
+const WebMidi = _WebMidi;
+const Pattern = _Pattern;
+
+export default function enableWebMidi() {
+  return new Promise((resolve, reject) => {
+    if (WebMidi.enabled) {
+      // if already enabled, just resolve WebMidi
+      resolve(WebMidi);
+      return;
+    }
+    WebMidi.enable((err) => {
+      if (err) {
+        reject(err);
+      }
+      resolve(WebMidi);
+    });
+  });
+}
+// const outputByName = (name: string) => WebMidi.getOutputByName(name);
+const outputByName = (name) => WebMidi.getOutputByName(name);
+
+// Pattern.prototype.midi = function (output: string | number, channel = 1) {
+Pattern.prototype.midi = function (output, channel = 1) {
+  if (output?.constructor?.name === 'Pattern') {
+    throw new Error(
+      `.midi does not accept Pattern input. Make sure to pass device name with single quotes. Example: .midi('${
+        WebMidi.outputs?.[0]?.name || 'IAC Driver Bus 1'
+      }')`
+    );
+  }
+  return this._withEvent((event) => {
+    // const onTrigger = (time: number, event: any) => {
+    const onTrigger = (time, event) => {
+      let note = event.value;
+      const velocity = event.context?.velocity ?? 0.9;
+      if (!isNote(note)) {
+        throw new Error('not a note: ' + note);
+      }
+      if (!WebMidi.enabled) {
+        throw new Error(`🎹 WebMidi is not enabled. Supported Browsers: https://caniuse.com/?search=webmidi`);
+      }
+      if (!WebMidi.outputs.length) {
+        throw new Error(`🔌 No MIDI devices found. Connect a device or enable IAC Driver.`);
+      }
+      let device;
+      if (typeof output === 'number') {
+        device = WebMidi.outputs[output];
+      } else if (typeof output === 'string') {
+        device = outputByName(output);
+      } else {
+        device = WebMidi.outputs[0];
+      }
+      if (!device) {
+        throw new Error(
+          `🔌 MIDI device '${output ? output : ''}' not found. Use one of ${WebMidi.outputs
+            .map((o) => `'${o.name}'`)
+            .join(' | ')}`
+        );
+      }
+      // console.log('midi', value, output);
+      const timingOffset = WebMidi.time - Tone.context.currentTime * 1000;
+      time = time * 1000 + timingOffset;
+      // const inMs = '+' + (time - Tone.context.currentTime) * 1000;
+      // await enableWebMidi()
+      device.playNote(note, channel, {
+        time,
+        duration: event.duration * 1000 - 5,
+        velocity,
+      });
+    };
+    return event.setContext({ ...event.context, onTrigger });
+  });
+};