Refactor Simpler device building to use playback state object

tests/ableton-playback.test.ts

@@ -1,6 +1,9 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
-import { hasOneShotOverride } from '../src/lib/exporters/ableton/playback';
+import {
+  getSimplerPlaybackState,
+  hasOneShotOverride,
+} from '../src/lib/exporters/ableton/playback';
 import { PadCode } from '../src/types/types';
 
 const project7Overrides = ['b0', 'c1', 'c8', 'c9', 'd3'] as PadCode[];
@@ -17,3 +20,29 @@ test('applies the selective Project 7 One-Shot overrides', () => {
 test('preserves project playback modes when no override is selected', () => {
   assert.equal(hasOneShotOverride('b0'), false);
 });
+
+test('changes only the active playback mode for forced KEY and LEGATO pads', () => {
+  assert.deepEqual(getSimplerPlaybackState('key', true), {
+    playbackMode: 1,
+    monophonic: false,
+    useOneShotEnvelope: false,
+  });
+  assert.deepEqual(getSimplerPlaybackState('legato', true), {
+    playbackMode: 1,
+    monophonic: true,
+    useOneShotEnvelope: false,
+  });
+});
+
+test('uses One-Shot envelopes only for native EP ONE pads', () => {
+  assert.deepEqual(getSimplerPlaybackState('oneshot', false), {
+    playbackMode: 1,
+    monophonic: false,
+    useOneShotEnvelope: true,
+  });
+  assert.deepEqual(getSimplerPlaybackState('legato', false), {
+    playbackMode: 0,
+    monophonic: true,
+    useOneShotEnvelope: false,
+  });
+});