add courses

courses-events/app/events/daily_sync_course_metadata.py

@@ -0,0 +1,35 @@
+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
+
+from boto3clients import dynamodb_client
+from config import API_URL, COURSE_TABLE
+
+course_layer = 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 course_layer.batch_writer() as batch:
+        for course in data:
+            batch.put_item(
+                {
+                    'id': {'S': course['id']},
+                    'sk': {'S': 'metadata#unit_price'},
+                    'unit_price': {'N': str(course['metadata']['unit_price'])},
+                    'create_date': {'S': now_.isoformat()},
+                }
+            )
+
+    return True