add user

courses-events/app/events/copy_course_metadata.py

@@ -0,0 +1,36 @@
+import requests
+from aws_lambda_powertools.utilities.data_classes import (
+    DynamoDBStreamEvent,
+    event_source,
+)
+from aws_lambda_powertools.utilities.typing import LambdaContext
+from layercake.dateutils import now
+from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair
+
+from boto3clients import dynamodb_client
+from config import API_URL, COURSE_TABLE
+
+dyn = DynamoDBPersistenceLayer(COURSE_TABLE, dynamodb_client)
+
+
+@event_source(data_class=DynamoDBStreamEvent)
+def lambda_handler(event: DynamoDBStreamEvent, context: LambdaContext) -> bool:
+    r = requests.get(f'{API_URL}/courses.json')
+    r.raise_for_status()
+
+    data = r.json()
+    now_ = now()
+
+    with dyn.transact_writer() as transact:
+        for course in data:
+            transact.update(
+                key=KeyPair(course['id'], '0'),
+                update_expr='SET metadata__unit_price = :unit_price, \
+                             updated_at = :updated_at',
+                expr_attr_values={
+                    ':unit_price': course['metadata']['unit_price'],
+                    ':updated_at': now_,
+                },
+            )
+
+    return True