feat: chargements de pages best-effort au boot (tableau, sources) (#78)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/figures.py

@@ -1,6 +1,5 @@
 from datetime import datetime
 from typing import Literal
-from urllib.error import HTTPError, URLError
 
 import dash_bootstrap_components as dbc
 import dash_leaflet as dl
@@ -120,9 +119,12 @@ def get_barchart_sources(lff: pl.LazyFrame, type_date: str):
 
 def get_sources_tables(source_path) -> html.Div:
     try:
+        if not source_path:
+            raise ValueError("SOURCE_STATS_CSV_PATH non défini")
         dff = pl.read_csv(source_path)
-    except (URLError, HTTPError):
-        return html.Div("Erreur de connexion")
+    except Exception as e:
+        logger.warning(f"Sources de données indisponibles ({e})")
+        return html.Div("Sources de données momentanément indisponibles.")
     dff = dff.with_columns(
         (
             pl.lit('<a href = "')

src/pages/tableau.py

@@ -21,7 +21,7 @@ from dash import (
 
 from src.db import query_marches, schema
 from src.figures import DataTable, make_column_picker
-from src.utils import get_last_modified, logger
+from src.utils import get_data_update_timestamp, logger
 from src.utils.seo import META_CONTENT
 from src.utils.table import (
     COLUMNS,
@@ -33,9 +33,16 @@ from src.utils.table import (
 )
 from src.utils.tracking import track_search
 
-update_date_timestamp = get_last_modified(os.getenv("DATA_FILE_PARQUET_PATH", ""))
-update_date = datetime.fromtimestamp(update_date_timestamp).strftime("%d/%m/%Y")
-update_date_iso = datetime.fromtimestamp(update_date_timestamp).isoformat()
+update_date_timestamp = get_data_update_timestamp(
+    os.getenv("DATA_FILE_PARQUET_PATH", ""),
+    os.getenv("DUCKDB_PATH", "./decp.duckdb"),
+)
+if update_date_timestamp is not None:
+    update_date = datetime.fromtimestamp(update_date_timestamp).strftime("%d/%m/%Y")
+    update_date_iso = datetime.fromtimestamp(update_date_timestamp).isoformat()
+else:
+    update_date = "date inconnue"
+    update_date_iso = ""
 
 
 NAME = "Tableau"

src/utils/__init__.py

@@ -41,3 +41,19 @@ DOMAIN_NAME = (
     if os.getenv("DEVELOPMENT", "False").lower() == "true"
     else "decp.info"
 )
+
+
+def get_data_update_timestamp(
+    parquet_path: str, fallback_path: str | None = None
+) -> float | None:
+    """Date de MAJ des données, best-effort, sans jamais lever (usage au boot)."""
+    try:
+        return get_last_modified(parquet_path)
+    except Exception as e:
+        logger.warning(f"Date de mise à jour des données indisponible ({e})")
+    if fallback_path:
+        try:
+            return os.path.getmtime(fallback_path)
+        except OSError:
+            pass
+    return None