05/08 Phase 4

app/tenant/pos/routes.py

@@ -212,6 +212,37 @@ def submit():
             )
             db.session.add(comm_log)
 
+    # ── Inventory auto-deduction for product line items ─────
+    for item in db.session.query(TransactionItem).filter_by(
+        transaction_id=txn.id
+    ).filter(TransactionItem.product_id.isnot(None)).all():
+        from app.models.salon import Inventory, InventoryLog, Product as _Prod
+        prod = _Prod.query.get(item.product_id)
+        if prod and prod.sku:
+            inv = Inventory.query.filter_by(
+                tenant_id=g.tenant.id,
+                location_id=g.location.id,
+                sku=prod.sku,
+            ).first()
+        elif prod:
+            inv = Inventory.query.filter_by(
+                tenant_id=g.tenant.id,
+                location_id=g.location.id,
+                name=prod.name,
+            ).first()
+        else:
+            inv = None
+
+        if inv and inv.qty_on_hand > 0:
+            inv.qty_on_hand -= item.qty
+            db.session.add(InventoryLog(
+                tenant_id=g.tenant.id,
+                location_id=g.location.id,
+                inventory_id=inv.id,
+                delta=-item.qty,
+                reason=f"POS sale txn#{txn.id}",
+            ))
+
     log_tenant_action("transaction.create", "transaction", txn.id,
                       {"total": float(total), "payment": payment_method})
     db.session.commit()