New dao and endpoints to create and update service data retention.

app/dao/service_data_retention_dao.py

@@ -0,0 +1,34 @@
+from datetime import datetime
+
+from app import db
+from app.dao.dao_utils import transactional
+from app.models import ServiceDataRetention
+
+
+def get_service_data_retention(service_id):
+    data_retention = ServiceDataRetention.query.filter_by(service_id=service_id).all()
+    return data_retention
+
+
+@transactional
+def insert_service_data_retention(service_id, notification_type, days_of_retention):
+    new_data_retention = ServiceDataRetention(service_id=service_id,
+                                              notification_type=notification_type,
+                                              days_of_retention=days_of_retention)
+
+    db.session.add(new_data_retention)
+    return new_data_retention
+
+
+@transactional
+def update_service_data_retention(service_data_retention_id, service_id, days_of_retention):
+    updated_count = ServiceDataRetention.query.filter(
+        ServiceDataRetention.id == service_data_retention_id,
+        ServiceDataRetention.service_id == service_id
+    ).update(
+        {
+            "days_of_retention": days_of_retention,
+            "updated_at": datetime.utcnow()
+        }
+    )
+    return updated_count