update email events

enrollments-events/app/events/schedule_reminders.py

@@ -0,0 +1,70 @@
+from datetime import timedelta
+
+from aws_lambda_powertools import Logger
+from aws_lambda_powertools.utilities.data_classes import (
+    EventBridgeEvent,
+    event_source,
+)
+from aws_lambda_powertools.utilities.typing import LambdaContext
+from layercake.dateutils import now, ttl
+from layercake.dynamodb import DynamoDBPersistenceLayer
+
+from boto3clients import dynamodb_client
+from config import (
+    ENROLLMENT_TABLE,
+)
+
+logger = Logger(__name__)
+enrollment_layer = DynamoDBPersistenceLayer(ENROLLMENT_TABLE, dynamodb_client)
+
+
+@event_source(data_class=EventBridgeEvent)
+@logger.inject_lambda_context
+def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
+    new_image = event.detail['new_image']
+    enrollment_id = new_image['id']
+    user = new_image['user']
+    course = new_image['course']
+    now_ = now()
+
+    with enrollment_layer.transact_writer() as transact:
+        transact.put(
+            item={
+                'id': enrollment_id,
+                'sk': 'SCHEDULE#REMINDER_NO_ACCESS_AFTER_3_DAYS',
+                'name': user.name,
+                'email': user.email,
+                'course': course.name,
+                'created_at': now_,
+                'ttl': ttl(days=3, start_dt=now_),
+            },
+        )
+        # By default, the enrollment will expire when the access period ends
+        # (scheduled below).
+        # If the enrollment is completed earlier (e.g., certificate issued),
+        # the expiration schedule is canceled and an archive schedule
+        # (`SCHEDULE#SET_AS_ARCHIVED`) is created instead.
+        transact.put(
+            item={
+                'id': enrollment_id,
+                'sk': 'SCHEDULE#SET_AS_EXPIRED',
+                'name': user.name,
+                'email': user.email,
+                'course': course.name,
+                'created_at': now_,
+                'ttl': ttl(start_dt=now_ + timedelta(days=course.access_period)),
+            },
+        )
+        transact.put(
+            item={
+                'id': enrollment_id,
+                'sk': 'REMINDER_ACCESS_PERIOD_BEFORE_15_DAYS',
+                'name': user.name,
+                'email': user.email,
+                'course': course.name,
+                'created_at': now_,
+                'ttl': ttl(start_dt=now_ + timedelta(days=course.access_period - 15)),
+            },
+        )
+
+    return True