fully typed project

app/server.py

@@ -15,7 +15,7 @@ class Server:
         self._cached_calendar = None
         self._cached_time = -cache_duration
 
-    def _cache_calendar(self):
+    def _cache_calendar(self) -> bool:
         if not self._cached_calendar or self._cached_time + self._cache_duration < time.time():
             calendar = grabber.grab_calendar(self._ics_url)
             if not calendar:
@@ -29,7 +29,7 @@ class Server:
 
         return True
 
-    def _response_callback(self, td_group: str, sh_group: str):
+    def _response_callback(self, td_group: str, sh_group: str) -> str | None:
         if not self._cache_calendar():
             return None
 
@@ -37,7 +37,7 @@ class Server:
 
         return filtered_calendar.serialize()
 
-    def serve(self):
+    def serve(self) -> None:
         handler_class = handler.generate_class(self._response_callback)
         server = HTTPServer((self._host, self._port), handler_class)
         logger.info(f"Listening on {self._host}:{self._port}")