add discount

api.saladeaula.digital/app/routes/coupons/__init__.py

@@ -0,0 +1,25 @@
+from typing import Annotated
+
+from aws_lambda_powertools.event_handler.api_gateway import Router
+from aws_lambda_powertools.event_handler.exceptions import (
+    NotFoundError,
+)
+from aws_lambda_powertools.event_handler.openapi.params import Path
+from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair
+
+from boto3clients import dynamodb_client
+from config import ORDER_TABLE
+
+router = Router()
+dyn = DynamoDBPersistenceLayer(ORDER_TABLE, dynamodb_client)
+
+
+class CouponNotFoundError(NotFoundError): ...
+
+
+@router.get('/<coupon>')
+def coupon(coupon: Annotated[str, Path(min_length=3)]):
+    return dyn.collection.get_item(
+        KeyPair('COUPON', coupon.upper()),
+        exc_cls=CouponNotFoundError,
+    )