feat: add visual green board activation presets

src/lib/engine/board-green-presets.test.ts

@@ -0,0 +1,39 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { activateGreenNodePreset, type GreenNodePreset } from './board-green-presets.ts';
+
+const summary = JSON.parse(readFileSync(new URL('../data/boards-summary.json', import.meta.url), 'utf8'));
+const expected: Record<GreenNodePreset, string[]> = {
+  3: ['G-001', 'G-002', 'G-005'],
+  5: ['G-001', 'G-002', 'G-003', 'G-004', 'G-005'],
+  7: ['G-001', 'G-002', 'G-003', 'G-004', 'G-005', 'G-006', 'G-007']
+};
+
+for (const count of [3, 5, 7] as const) {
+  test(`${count}칸은 모든 멤버의 지정 초록 노드만 활성화한다`, () => {
+    const result = activateGreenNodePreset({}, summary.members, summary.models, count);
+    assert.equal(Object.keys(result).length, summary.members.length);
+    for (const member of summary.members) {
+      assert.deepEqual(result[member.id].toSorted(), expected[count], member.id);
+    }
+  });
+}
+
+test('7칸 적용 후 3칸·5칸을 반복 적용해도 기존 활성 상태를 보존하며 원본을 변경하지 않는다', () => {
+  const memberId = summary.members[0].id;
+  const original = { [memberId]: ['B-001', 'Y-001', 'G-001', 'G-008'], other: ['R-001'] };
+  const snapshot = structuredClone(original);
+  const seven = activateGreenNodePreset(original, summary.members, summary.models, 7);
+  const three = activateGreenNodePreset(seven, summary.members, summary.models, 3);
+  const five = activateGreenNodePreset(three, summary.members, summary.models, 5);
+  assert.deepEqual(original, snapshot);
+  assert.deepEqual(five, seven);
+  assert.deepEqual(five[memberId].toSorted(), ['B-001', ...expected[7], 'G-008', 'Y-001']);
+  assert.deepEqual(five.other, ['R-001']);
+});
+
+test('선택 좌표에 다른 색 노드가 있으면 활성화하지 않는다', () => {
+  const models = { model: [{ groupId: 'B-001', x: 0, y: -1 }, { groupId: 'Y-001', x: -1, y: -2 }] };
+  assert.deepEqual(activateGreenNodePreset({}, [{ id: 'a', positionGroupId: 'model' }], models, 7), { a: [] });
+});

src/lib/engine/board-green-presets.ts

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+export type GreenNodePreset = 3 | 5 | 7;
+
+type BoardPosition = { groupId: string; x: number; y: number };
+type BoardMember = { id: string; positionGroupId: string };
+
+// Ordered so the first 3, 5 or 7 coordinates define each preset and its preview.
+export const greenNodePresetPositions = [
+  { x: 0, y: -1 }, { x: 0, y: -2 }, { x: 0, y: -3 },
+  { x: -1, y: -2 }, { x: 1, y: -2 },
+  { x: 0, y: -4 }, { x: 0, y: -5 }
+] as const;
+
+/** Add the central green branch without resetting any existing board progress. */
+export function activateGreenNodePreset(
+  memberBoards: Readonly<Record<string, readonly string[]>>,
+  members: readonly BoardMember[],
+  models: Readonly<Record<string, readonly BoardPosition[]>>,
+  count: GreenNodePreset
+): Record<string, string[]> {
+  const result = Object.fromEntries(Object.entries(memberBoards).map(([id, nodes]) => [id, [...nodes]]));
+  const coordinates = greenNodePresetPositions.slice(0, count);
+  for (const member of members) {
+    const nodes = (models[member.positionGroupId] ?? []).filter(({ groupId, x, y }) =>
+      groupId.startsWith('G-') && coordinates.some((position) => position.x === x && position.y === y)
+    );
+    result[member.id] = [...new Set([...(result[member.id] ?? []), ...nodes.map((node) => node.groupId)])];
+  }
+  return result;
+}