From 992f6d4f93f3643853cce7a229aa1bf17f923bdd Mon Sep 17 00:00:00 2001
From: Colin Maudry <colin@maudry.com>
Date: Mon, 22 Jun 2026 17:46:31 +0200
Subject: [PATCH] Recherche dans les tableaux insensible aux accents #79

---
 src/utils/table.py  | 30 +++++++++++++++++++++++++-----
 tests/test_table.py | 27 +++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/src/utils/table.py b/src/utils/table.py
index ef5221c..fa17880 100644
--- a/src/utils/table.py
+++ b/src/utils/table.py
@@ -4,6 +4,7 @@ import uuid
 import polars as pl
 from dash import no_update
 from polars import selectors as cs
+from unidecode import unidecode
 
 from src.db import count_marches, count_unique_marches, query_marches, schema
 from src.utils import logger
@@ -215,6 +216,25 @@ def format_values(dff: pl.DataFrame) -> pl.DataFrame:
     return dff
 
 
+_ACCENT_REPLACEMENTS = [
+    ("[éèêëÉÈÊË]", "e"),
+    ("[àâäÀÂÄ]", "a"),
+    ("[ùûüÙÛÜ]", "u"),
+    ("[îïÎÏ]", "i"),
+    ("[ôöÔÖ]", "o"),
+    ("[çÇ]", "c"),
+    ("[ñÑ]", "n"),
+    ("[æÆ]", "ae"),
+    ("[œŒ]", "oe"),
+]
+
+
+def _deaccent_col(expr: pl.Expr) -> pl.Expr:
+    for pattern, replacement in _ACCENT_REPLACEMENTS:
+        expr = expr.str.replace_all(pattern, replacement)
+    return expr
+
+
 def filter_table_data(lff: pl.LazyFrame, filter_query: str) -> pl.LazyFrame:
     _schema = lff.collect_schema()
     filtering_expressions = filter_query.split(" && ")
@@ -256,17 +276,17 @@ def filter_table_data(lff: pl.LazyFrame, filter_query: str) -> pl.LazyFrame:
             elif operator == "contains":
                 if col_type in ["String", "Date"] and isinstance(filter_value, str):
                     filter_value = filter_value.strip('"')
+                    normalized_value = unidecode(filter_value)
+                    col_expr = _deaccent_col(pl.col(col_name))
                     if filter_value.endswith("*"):
                         lff = lff.filter(
-                            pl.col(col_name).str.starts_with(filter_value[:-1])
+                            col_expr.str.starts_with(normalized_value[:-1])
                         )
                     elif filter_value.startswith("*"):
-                        lff = lff.filter(
-                            pl.col(col_name).str.ends_with(filter_value[1:])
-                        )
+                        lff = lff.filter(col_expr.str.ends_with(normalized_value[1:]))
                     else:
                         lff = lff.filter(
-                            pl.col(col_name).str.contains("(?i)" + filter_value)
+                            col_expr.str.contains("(?i)" + normalized_value)
                         )
                 elif col_type.startswith("Int") or col_type.startswith("Float"):
                     lff = lff.filter(pl.col(col_name) == filter_value)
diff --git a/tests/test_table.py b/tests/test_table.py
index 643e34c..0df5e50 100644
--- a/tests/test_table.py
+++ b/tests/test_table.py
@@ -44,6 +44,33 @@ def test_filter_table_data_does_not_call_track_search(monkeypatch, sample_lff):
     assert result.height == 1
 
 
+def test_filter_table_data_accent_insensitive():
+    """Chercher sans accent doit trouver des valeurs accentuées, et vice versa."""
+    from src.utils.table import filter_table_data
+
+    lff = pl.LazyFrame(
+        [
+            {"uid": "1", "acheteur_nom": "Mairie de Nîmes", "objet": "Voirie"},
+            {"uid": "2", "acheteur_nom": "Commune de Reims", "objet": "Éclairage"},
+            {"uid": "3", "acheteur_nom": "Ville de Paris", "objet": "Travaux"},
+        ]
+    )
+
+    # Sans accent → trouve la valeur accentuée
+    result = filter_table_data(lff, "{acheteur_nom} icontains Nimes").collect()
+    assert result.height == 1
+    assert result["uid"][0] == "1"
+
+    # Avec accent → trouve la valeur accentuée
+    result = filter_table_data(lff, "{acheteur_nom} icontains Nîmes").collect()
+    assert result.height == 1
+
+    # Sans accent → trouve la valeur avec accent initial (É)
+    result = filter_table_data(lff, "{objet} icontains eclairage").collect()
+    assert result.height == 1
+    assert result["uid"][0] == "2"
+
+
 def test_normalize_sort_by_handles_empty():
     from src.utils.table import normalize_sort_by