1 files changed, 12 insertions, 1 deletions

diff --git a/src/mailman_pgp/model/list.py b/src/mailman_pgp/model/list.py
index 9bee16d..da542de 100644
--- a/src/mailman_pgp/model/list.py
+++ b/src/mailman_pgp/model/list.py
@@ -22,14 +22,16 @@ from os.path import exists, isfile, join
 from flufl.lock import Lock
 from mailman.database.types import Enum, SAUnicode
 from mailman.interfaces.action import Action
-from mailman.interfaces.listmanager import IListManager
+from mailman.interfaces.listmanager import IListManager, ListDeletedEvent
 from pgpy import PGPKey
 from public import public
 from sqlalchemy import Boolean, Column, Integer
 from sqlalchemy.orm import reconstructor
 from zope.component import getUtility
+from zope.event import classhandler
 
 from mailman_pgp.config import config
+from mailman_pgp.database import transaction
 from mailman_pgp.model.base import Base
 from mailman_pgp.pgp.keygen import ListKeyGenerator
 
@@ -143,3 +145,12 @@ class PGPMailingList(Base):
         if mlist is None:
             return None
         return PGPMailingList.query().filter_by(list_id=mlist.list_id).first()
+
+
+@classhandler.handler(ListDeletedEvent)
+def on_delete(mlist):
+    pgp_list = PGPMailingList.for_list(mlist)
+    if pgp_list:
+        with transaction() as session:
+            # TODO shred the list key
+            session.delete(pgp_list)