feat: barcode printing

modules/fulfillment_base/services/barcode_printer_service.py

@@ -0,0 +1,41 @@
+import base64
+from io import BytesIO
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from modules.fulfillment_base.barcodes_pdf_gen import BarcodePdfGenerator, BarcodeData
+from modules.fulfillment_base.models import Product
+from modules.fulfillment_base.repositories import ProductRepository
+from modules.fulfillment_base.schemas.product import GetProductBarcodePdfRequest
+
+
+class BarcodePrinterService:
+    session: AsyncSession
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+
+    async def generate_pdf(
+        self, request: GetProductBarcodePdfRequest
+    ) -> tuple[str, BytesIO]:
+        product: Product = await ProductRepository(self.session).get_by_id(
+            request.product_id
+        )
+        barcode_data: BarcodeData = {
+            "barcode": request.barcode,
+            "template": product.barcode_template,
+            "product": product,
+            "num_duplicates": request.quantity,
+        }
+        filename = f"{product.id}_barcode.pdf"
+
+        size = product.barcode_template.size
+        generator = BarcodePdfGenerator(size.width, size.height)
+        return filename, generator.generate([barcode_data])
+
+    async def generate_base64(
+        self, request: GetProductBarcodePdfRequest
+    ) -> tuple[str, str]:
+        filename, pdf_buffer = await self.generate_pdf(request)
+        base64_string = base64.b64encode(pdf_buffer.read()).decode("utf-8")
+        return filename, base64_string