implement mailing subscription for positions api

ceod/api/positions.py

@@ -37,5 +37,3 @@ def update_positions():
 
     txn = UpdateMemberPositionsTransaction(member_positions)
     return create_streaming_response(txn)
-
-    # TODO un/subscribe to mailing list

ceod/model/LDAPService.py

@@ -82,8 +82,8 @@ class LDAPService:
         entry = self._get_readable_entry_for_group(conn, cn)
         return Group.deserialize_from_ldap(entry)
 
-    def get_users_with_positions(self, gssapi_bind: bool = False) -> List[IUser]:
-        conn = self._get_ldap_conn(gssapi_bind)
+    def get_users_with_positions(self) -> List[IUser]:
+        conn = self._get_ldap_conn()
         conn.search(self.ldap_users_base, '(position=*)', attributes=ldap3.ALL_ATTRIBUTES)
         return [User.deserialize_from_ldap(entry) for entry in conn.entries]
 

ceod/transactions/members/UpdateMemberPositionsTransaction.py

@@ -3,22 +3,30 @@ from typing import List, Dict
 from zope import component
 
 from ..AbstractTransaction import AbstractTransaction
-from ceo_common.interfaces import ILDAPService
+from ceo_common.interfaces import ILDAPService, IConfig
+from ceo_common.errors import UserAlreadySubscribedError, UserNotSubscribedError
+from ceo_common.logger_factory import logger_factory
+
+logger = logger_factory(__name__)
 
 class UpdateMemberPositionsTransaction(AbstractTransaction):
     """
-    Transaction to update member's positions, and remove positions for anyone that's not in the list
+    Transaction to update member's positions, and remove positions for anyone that's not in the list,
+    then subscribe new execs to mailing list and unsubscribe old execs from it.
     """
 
     # Positions is a dict where keys are member names and values are the list of positions they have
     def __init__(self, positions: Dict[str, List[str]]):
         super().__init__()
         self.positions = positions
-        self.ldap_srv = component.getUtility(ILDAPService)
         self.old_positions = {} # For rollback
+        self.ldap_srv = component.getUtility(ILDAPService)
 
     def child_execute_iter(self):
-        new_positions = {}
+        cfg = component.getUtility(IConfig)
+        mailing_lists = cfg.get('auxiliary mailing lists_exec')
+
+        subscribe_status: Dict[IUser, bool] = {}
 
         # Remove positions for old users
         for user in self.ldap_srv.get_users_with_positions():
@@ -30,13 +38,23 @@ class UpdateMemberPositionsTransaction(AbstractTransaction):
             user = self.ldap_srv.get_user(username)
             self.old_positions[username] = user.positions[:]
             user.set_positions(positions)
-
-            for position in user.positions:
-                new_positions[position] = user.uid
-
+            subscribe_status[user] = len(positions) > 0
             yield f'update_positions_{username}'
 
-        self.finish(new_positions)
+        # Update mailing list subscription
+        for user, subscribe in subscribe_status.items():
+            for mailing_list in mailing_lists:
+                try:
+                    if subscribe:
+                        user.subscribe_to_mailing_list(mailing_list)
+                    else:
+                        user.unsubscribe_from_mailing_list(mailing_list)
+                except (UserAlreadySubscribedError, UserNotSubscribedError):
+                    pass
+                except Exception as e:
+                    logger.warning(f'Failed to update mailing list for {user.uid}')
+
+        self.finish(None)
 
     def rollback(self):
         for username, positions in self.old_positions.items():