make POST on positions api return result again

ceod/api/positions.py

@@ -28,12 +28,5 @@ def update_positions():
     body = request.get_json(force=True)
     # TODO verify json
 
-    # Reverse the dict so it's easier to use
-    member_positions = {}
-    for position, user in body.items():
-        if user not in member_positions:
-            member_positions[user] = []
-        member_positions[user].append(position)
-
-    txn = UpdateMemberPositionsTransaction(member_positions)
+    txn = UpdateMemberPositionsTransaction(body)
     return create_streaming_response(txn)

ceod/transactions/members/UpdateMemberPositionsTransaction.py

@@ -16,17 +16,24 @@ class UpdateMemberPositionsTransaction(AbstractTransaction):
     """
 
     # 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]]):
+    def __init__(self, positions_reversed: Dict[str, List[str]]):
         super().__init__()
-        self.positions = positions
         self.old_positions = {} # For rollback
         self.ldap_srv = component.getUtility(ILDAPService)
 
+        # Reverse the dict so it's easier to use
+        self.positions = {}
+        for position, user in positions_reversed.items():
+            if user not in self.positions:
+                self.positions[user] = []
+            self.positions[user].append(position)
+
     def child_execute_iter(self):
         cfg = component.getUtility(IConfig)
         mailing_lists = cfg.get('auxiliary mailing lists_exec')
 
         subscribe_status: Dict[IUser, bool] = {}
+        new_positions_reversed: Dict[str, str] = {} # For returning result
 
         # Remove positions for old users
         for user in self.ldap_srv.get_users_with_positions():
@@ -38,7 +45,12 @@ class UpdateMemberPositionsTransaction(AbstractTransaction):
             user = self.ldap_srv.get_user(username)
             self.old_positions[username] = user.positions[:]
             user.set_positions(positions)
+
             subscribe_status[user] = len(positions) > 0
+
+            for position in user.positions:
+                new_positions_reversed[position] = user.uid
+
             yield f'update_positions_{username}'
 
         # Update mailing list subscription
@@ -54,7 +66,7 @@ class UpdateMemberPositionsTransaction(AbstractTransaction):
                 except Exception as e:
                     logger.warning(f'Failed to update mailing list for {user.uid}')
 
-        self.finish(None)
+        self.finish(new_positions_reversed)
 
     def rollback(self):
         for username, positions in self.old_positions.items():