add iugu postback

orders-events/app/app.py

@@ -1,5 +1,6 @@
 from http import HTTPStatus
 from typing import Any
+from urllib.parse import parse_qsl
 
 from aws_lambda_powertools import Logger, Tracer
 from aws_lambda_powertools.event_handler.api_gateway import (
@@ -8,7 +9,8 @@ from aws_lambda_powertools.event_handler.api_gateway import (
 )
 from aws_lambda_powertools.logging import correlation_paths
 from aws_lambda_powertools.utilities.typing import LambdaContext
-from layercake.dynamodb import DynamoDBPersistenceLayer
+from layercake.dateutils import now
+from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair
 
 from boto3clients import dynamodb_client
 from config import ORDER_TABLE
@@ -19,10 +21,35 @@ app = APIGatewayHttpResolver(enable_validation=True)
 dyn = DynamoDBPersistenceLayer(ORDER_TABLE, dynamodb_client)
 
 
-@app.post('/postback/<order_id>')
+@app.post('/<order_id>/postback')
 @tracer.capture_method
 def postback(order_id: str):
-    return Response(status_code=HTTPStatus.NO_CONTENT)
+    decoded_body = dict(parse_qsl(app.current_event.decoded_body))
+    logger.info('IUGU Postback', decoded_body=decoded_body)
+    event = decoded_body['event']
+    status = decoded_body['data[status]'].upper()
+
+    if event != 'invoice.status_changed':
+        return Response(status_code=HTTPStatus.NO_CONTENT)
+
+    try:
+        dyn.update_item(
+            key=KeyPair(order_id, '0'),
+            update_expr='SET #status = :status, \
+                             updated_at = :now',
+            cond_expr='attribute_exists(sk)',
+            expr_attr_names={
+                '#status': 'status',
+            },
+            expr_attr_values={
+                ':status': status,
+                ':now': now(),
+            },
+        )
+    except Exception:
+        return Response(status_code=HTTPStatus.NOT_FOUND)
+    else:
+        return Response(status_code=HTTPStatus.NO_CONTENT)
 
 
 @logger.inject_lambda_context(correlation_id_path=correlation_paths.API_GATEWAY_HTTP)