move db error handling from per-page to base page

src/ez_lan_manager/pages/BasePage.py

@@ -2,9 +2,9 @@ from __future__ import annotations
 
 from typing import *  # type: ignore
 
-from rio import Component, event, Spacer, Card, Container, Column, Row, Rectangle, TextStyle, Color, Text
+from rio import Component, event, Spacer, Card, Container, Column, Row, TextStyle, Color, Text
 
-from src.ez_lan_manager import ConfigurationService
+from src.ez_lan_manager import ConfigurationService, DatabaseService
 from src.ez_lan_manager.components.DesktopNavigation import DesktopNavigation
 
 class BasePage(Component):
@@ -14,6 +14,11 @@ class BasePage(Component):
     async def on_window_size_change(self):
         await self.force_refresh()
 
+    @event.on_populate
+    async def check_db_connection(self):
+        if not self.session[DatabaseService].is_connected:
+            self.session.navigate_to("./db-error")
+
     def build(self) -> Component:
         if self.content is None:
             content = Spacer()
@@ -63,3 +68,4 @@ class BasePage(Component):
                 align_y=0.5,
                 style=TextStyle(fill=Color.from_hex("FFFFFF"), font_size=0.8)
             )
+