Refactor message formatting for ban notifications

Author: karel26

plugins/mission/listener.py

@@ -673,9 +673,8 @@ async def onBanReject(self, server: Server, data: dict) -> None:
         admin_channel = self.bot.get_admin_channel(server)
         if not admin_channel:
             return
-        player = server.get_player(ucid=data['ucid'])
         message = _('Banned user {name} (ucid={ucid}, ipaddr={ipaddr}) rejected. Reason: {reason}').format(
-            name=player.display_name, ucid=data['ucid'], ipaddr=data['ipaddr'], reason=data['reason'])
+            name=data.get('name', 'n/a'), ucid=data['ucid'], ipaddr=data['ipaddr'], reason=data['reason'])
         await admin_channel.send(f"```{message}```")
 
     @event(name="onBanEvade")
@@ -689,7 +688,7 @@ async def onBanEvade(self, server: Server, data: dict) -> None:
 
         message = _('Player {name} (ucid={ucid}) connected from the same IP (ipaddr={ipaddr}) '
                     'as banned player {old_name} (ucid={old_ucid}), who was banned for {reason}!').format(
-            name=data['name'], ucid=data['ucid'], ipaddr=data['ipaddr'], old_name=old_name,
+            name=data.get('name', 'n/a'), ucid=data['ucid'], ipaddr=data['ipaddr'], old_name=old_name,
             old_ucid=data['old_ucid'], reason=data['reason']
         )
         view = View(timeout=None)