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)
             )
+

src/ez_lan_manager/pages/NewsPage.py

@@ -3,7 +3,6 @@ from rio import Column, Component, event
 from src.ez_lan_manager import ConfigurationService, NewsService
 from src.ez_lan_manager.components.NewsPost import NewsPost
 from src.ez_lan_manager.pages import BasePage
-from src.ez_lan_manager.services.DatabaseService import NoDatabaseConnectionError
 from src.ez_lan_manager.types.News import News
 
 
@@ -13,10 +12,7 @@ class NewsPage(Component):
     @event.on_populate
     async def on_populate(self) -> None:
         await self.session.set_title(f"{self.session[ConfigurationService].get_lan_info().name} - Neuigkeiten")
-        try:
-            self.news_posts = self.session[NewsService].get_news()[:8]
-        except NoDatabaseConnectionError:
-            self.session.navigate_to("db-error")
+        self.news_posts = self.session[NewsService].get_news()[:8]
 
     def build(self) -> Component:
         posts = [NewsPost(