feat: make server own tabs

apps/api/src/devices/tab-events.spec.ts

@@ -33,6 +33,39 @@ describe('parseTabEvents', () => {
     expect(rejected).toEqual([]);
   });
 
+  it('accepts tab and stock events, and a stock count of zero', () => {
+    const base = { occurredAt: '2026-10-24T21:00:00.000Z' };
+    const { accepted, rejected } = parseTabEvents([
+      { ...base, id: '1b2c3d4e-5f6a-4b7c-8d9e-0f1a2b3c4d5e', type: 'tab_opened', tabId: 't1', customerName: 'Jan', openedAt: base.occurredAt },
+      { ...base, id: '2c3d4e5f-6a7b-4c8d-9e0f-1a2b3c4d5e6f', type: 'tab_renamed', tabId: 't1', customerName: 'Jan P.' },
+      { ...base, id: '3d4e5f6a-7b8c-4d9e-8f1a-2b3c4d5e6f7a', type: 'stock_set', productId: '12', quantity: 0 },
+      { ...base, id: '4e5f6a7b-8c9d-4e0f-9a2b-3c4d5e6f7a8b', type: 'stock_set', productId: '12', quantity: null },
+    ]);
+
+    expect(rejected).toEqual([]);
+    expect(accepted.map((e) => e.type)).toEqual(['tab_opened', 'tab_renamed', 'stock_set', 'stock_set']);
+  });
+
+  it('rejects a stock count without a product or below zero, and a tab event without a tab', () => {
+    const base = { occurredAt: '2026-10-24T21:00:00.000Z' };
+    const { accepted, rejected } = parseTabEvents([
+      { ...base, id: '5f6a7b8c-9d0e-4f1a-8b3c-4d5e6f7a8b9c', type: 'stock_set', quantity: 3 },
+      { ...base, id: '6a7b8c9d-0e1f-4a2b-9c4d-5e6f7a8b9c0d', type: 'stock_set', productId: '12', quantity: -1 },
+      { ...base, id: '7b8c9d0e-1f2a-4b3c-8d5e-6f7a8b9c0d1e', type: 'tab_opened', customerName: 'Jan' },
+    ]);
+
+    expect(accepted).toEqual([]);
+    expect(rejected).toHaveLength(3);
+  });
+
+  it('stores a stock count without a tab', () => {
+    const [event] = parseTabEvents([
+      { id: '8c9d0e1f-2a3b-4c4d-9e6f-7a8b9c0d1e2f', type: 'stock_set', productId: '12', quantity: 30, occurredAt: '2026-10-24T21:00:00.000Z' },
+    ]).accepted;
+
+    expect(tabEventRow(event, 'v1', 'd1', now)).toMatchObject({ type: 'stock_set', tabId: null, productId: '12', stockSetTo: 30 });
+  });
+
   it('rejects invalid events one by one, keeping their id', () => {
     const { accepted, rejected } = parseTabEvents([
       lineAdded,
@@ -87,7 +120,7 @@ describe('tabEventRow', () => {
     const row = tabEventRow(event, 'v1', 'd1', now);
 
     expect(row).toMatchObject({ type: 'settled', amountInCents: 500, paymentMethod: 'payconiq', commandId: null });
-    expect(row.items).toEqual(settled.items);
+    expect(row.items).toEqual([{ productId: null, productName: 'Cola', quantity: 2, unitPriceInCents: 250 }]);
     expect(row.quantityDelta).toBeUndefined();
   });