improved typing

api/ovkiosk/dav_file.py

@@ -1,7 +1,7 @@
 import logging
 from io import BytesIO
 from threading import Lock
-from typing import Any
+from typing import Any, Optional
 
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
 from webdav3.client import Client, Resource
@@ -10,9 +10,8 @@ _logger = logging.getLogger(__name__)
 
 
 class DavFile:
-    __instances = None
+    __instances: Optional[list["DavFile"]] = None
     __scheduler = None
-    __job = None
 
     def __init__(self, client: Client, path: Any) -> None:
         self.__resource: Resource = client.resource(path)
@@ -25,7 +24,7 @@ class DavFile:
 
         DavFile.__instances.append(self)
 
-    def update(self) -> None:
+    def download(self) -> None:
         _logger.info(f"updating {self.__resource}")
         with self.__lock:
             self.__buffer.seek(0)
@@ -33,8 +32,8 @@ class DavFile:
             self.__resource.write_to(self.__buffer)
 
     @classmethod
-    def refresh(cls, refresh_interval: int = 60):
-        if cls.__job is not None:
+    def refresh(cls, refresh_interval: int = 60) -> None:
+        if cls.__scheduler is not None:
             cls.__scheduler.reschedule_job(
                 job_id=cls.__name__,
                 trigger="interval",
@@ -44,13 +43,13 @@ class DavFile:
 
         def tick() -> None:
             for davfile in DavFile.__instances:
-                davfile.update()
+                davfile.download()
 
         cls.__scheduler = AsyncIOScheduler()
         cls.__scheduler.start()
 
         cls.__scheduler.add_job(tick)
-        cls.__job = cls.__scheduler.add_job(
+        cls.__scheduler.add_job(
             tick,
             id=cls.__name__,
             trigger="interval",