From deba0a244eedeb13b012ee80f1fbad45cc54ccb0 Mon Sep 17 00:00:00 2001
From: Colin Maudry <colin@maudry.com>
Date: Mon, 2 Feb 2026 18:28:05 +0100
Subject: [PATCH] Ajout d'un lien canonique vers chaque page dans le head #70
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Dynamique, donc pas sûr que les moteurs de recherche le voit.
---
 src/pages/tableau.py | 6 ++++++
 src/utils.py         | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/pages/tableau.py b/src/pages/tableau.py
index 724f0b8..ab95c80 100644
--- a/src/pages/tableau.py
+++ b/src/pages/tableau.py
@@ -22,6 +22,7 @@ from dash import (
 from figures import make_column_picker
 from src.figures import DataTable
 from src.utils import (
+    add_canonical_link,
     columns,
     df,
     filter_table_data,
@@ -525,3 +526,8 @@ def sync_sort_to_local_storage(sort_by):
 )
 def reset_view(n_clicks):
     return "", []
+
+
+@callback(Input("tableau_url", "pathname"))
+def cb_add_canonical_link(pathname):
+    add_canonical_link(pathname)
diff --git a/src/utils.py b/src/utils.py
index 57385fd..26411ce 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -5,6 +5,7 @@ import uuid
 from collections import OrderedDict
 from time import localtime, sleep
 
+import dash
 import polars as pl
 import polars.selectors as cs
 from httpx import get, post
@@ -721,6 +722,14 @@ def make_org_jsonld(org_id, org_type, org_name=None, type_org_id="SIRET") -> dic
     return jsonld
 
 
+def add_canonical_link(pathname):
+    @dash.hooks.index()
+    def update_index(html_string):
+        url = f"https://{domain_name}{pathname}"
+        canonical_tag = f'<link rel="canonical" href="{url}" />'
+        return html_string.replace("</head>", f"{canonical_tag}\n    </head>")
+
+
 df: pl.DataFrame = get_decp_data()
 schema = df.collect_schema()