adds logic for gcn.notices. notices, replace healpix_file if present

gcn_email/core.py

@@ -8,6 +8,7 @@
 from email.message import EmailMessage
 import logging
 import os
+import json
 
 import boto3
 from boto3.dynamodb.conditions import Key
@@ -80,6 +81,11 @@ def kafka_message_to_email(message):
         email_message.add_attachment(
             message.value(), filename='notice.xml',
             maintype='application', subtype='xml')
+    elif topic.startswith('gcn.notices.'):
+        value = json.loads(message.value().decode())
+        if 'healpix_file' in value:
+            value['healpix_file'] = 'This content is too large for email. To receive it, see https://gcn.nasa.gov/quickstart'
+        email_message.set_content(json.dumps(value, indent=4))
     else:
         email_message.add_attachment(
             message.value(), filename='notice.bin',