Overhaul Sessioning

src/ezgg_lan_manager/services/RefreshService.py

@@ -0,0 +1,17 @@
+from typing import Callable
+
+
+class RefreshService:
+    """
+    rio.Components can subscribe to this service with their on_populate method.
+    Those methods get called whenever a overall refresh is needed. Usually when the user logs in or out.
+    """
+    def __init__(self) -> None:
+        self.subscribers: set[Callable] = set()
+
+    def subscribe(self, refresh_cb: Callable) -> None:
+        self.subscribers.add(refresh_cb)
+
+    async def trigger_refresh(self) -> None:
+        for refresh_cb in self.subscribers:
+            await refresh_cb()