From 0d38b784bc2c450202f049a7ede3236ec038fc52 Mon Sep 17 00:00:00 2001
From: FinnStutzenstein <finn.stutzenstein@hotmail.de>
Date: Fri, 29 Nov 2019 12:59:34 +0100
Subject: [PATCH] Fixed late autoupdates with deleted users

---
 openslides/utils/auth.py      | 14 +++++++++++---
 openslides/utils/consumers.py |  7 ++++++-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/openslides/utils/auth.py b/openslides/utils/auth.py
index bfadeb6d9..7407370a0 100644
--- a/openslides/utils/auth.py
+++ b/openslides/utils/auth.py
@@ -19,6 +19,14 @@ group_collection_string = "users/group"
 user_collection_string = "users/user"
 
 
+class UserDoesNotExist(Exception):
+    """
+    This is raised, if some permissions checks are done on not existing users.
+    """
+
+    pass
+
+
 def get_group_model() -> Model:
     """
     Return the Group model that is active in this project.
@@ -78,7 +86,7 @@ async def async_has_perm(user_id: int, perm: str) -> bool:
             user_collection_string, user_id
         )
         if user_data is None:
-            raise RuntimeError(f"User with id {user_id} does not exist.")
+            raise UserDoesNotExist()
         if GROUP_ADMIN_PK in user_data["groups_id"]:
             # User in admin group (pk 2) grants all permissions.
             has_perm = True
@@ -92,7 +100,7 @@ async def async_has_perm(user_id: int, perm: str) -> bool:
                 )
                 if group is None:
                     raise RuntimeError(
-                        f"User is in non existing group with id {group_id}."
+                        f"User {user_id} is in non existing group {group_id}."
                     )
 
                 if perm in group["permissions"]:
@@ -135,7 +143,7 @@ async def async_in_some_groups(user_id: int, groups: List[int]) -> bool:
             user_collection_string, user_id
         )
         if user_data is None:
-            raise RuntimeError(f"User with id {user_id} does not exist.")
+            raise UserDoesNotExist()
         if GROUP_ADMIN_PK in user_data["groups_id"]:
             # User in admin group (pk 2) grants all permissions.
             in_some_groups = True
diff --git a/openslides/utils/consumers.py b/openslides/utils/consumers.py
index f8f7b5bfe..610044dc6 100644
--- a/openslides/utils/consumers.py
+++ b/openslides/utils/consumers.py
@@ -7,7 +7,7 @@ from channels.generic.websocket import AsyncWebsocketConsumer
 
 from ..utils.websocket import WEBSOCKET_CHANGE_ID_TOO_HIGH
 from . import logging
-from .auth import async_anonymous_is_enabled
+from .auth import UserDoesNotExist, async_anonymous_is_enabled
 from .autoupdate import AutoupdateFormat
 from .cache import ChangeIdTooLowError, element_cache, split_element_id
 from .utils import get_worker_id
@@ -149,6 +149,11 @@ class SiteConsumer(ProtocollAsyncJsonWebsocketConsumer):
             changed_elements = await element_cache.get_all_data_list(user_id)
             all_data = True
             deleted_elements: Dict[str, List[int]] = {}
+        except UserDoesNotExist:
+            # Maybe the user was deleted, but a websocket connection is still open to the user.
+            # So we can close this connection and return.
+            await self.close()
+            return
         else:
             all_data = False
             deleted_elements = defaultdict(list)