feat: spacers between barcodes of diff products, avoid product cut in deal document, deal document refactoring

services/barcode.py

@@ -1,4 +1,5 @@
-from typing import Dict
+from io import BytesIO
+from typing import Dict, Tuple
 
 from sqlalchemy import select, update, insert
 from sqlalchemy.orm import selectinload, joinedload
@@ -76,8 +77,7 @@ class BarcodeService(BaseService):
         )
         return GetProductBarcodeResponse(barcode=barcode)
 
-    async def get_barcode_pdf(self, request: GetProductBarcodePdfRequest) -> GetProductBarcodeResponse:
-        # get product by id
+    async def get_barcode_pdf(self, request: GetProductBarcodePdfRequest) -> Tuple[str, BytesIO]:
         stmt = (
             select(Product)
             .options(
@@ -102,7 +102,7 @@ class BarcodeService(BaseService):
         )
         return filename, pdf_buffer
 
-    async def get_deal_barcodes_pdf(self, request: GetDealProductsBarcodesPdfRequest) -> GetProductBarcodeResponse:
+    async def get_deal_barcodes_pdf(self, request: GetDealProductsBarcodesPdfRequest) -> Tuple[str, BytesIO]:
         stmt = (
             select(Deal)
             .options(