From 13dd4b62c2516506f94c049f11acb1e535ee12f9 Mon Sep 17 00:00:00 2001
From: Christian Vidal Wolf <christianvidalwolf@gmail.com>
Date: Wed, 25 Feb 2026 14:22:58 +0100
Subject: [PATCH] fix(parser): add alphanumeric sanitizer to excel header
 mapping to support characters like % and parenthesis

---
 services/dataProcessor.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index 1c9b84a..c8e3da5 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -239,12 +239,16 @@ const normalizeMonth = (rawMonth: string): string => {
 const getColumnValue = (row: any, aliases: string[]): string => {
     const rowKeys = Object.keys(row);
     const normalizedRowKeys: Record<string, string> = {};
+
     rowKeys.forEach(k => {
-        normalizedRowKeys[k.trim().toLowerCase()] = k;
+        // Normalize by removing all non-alphanumeric characters for a bulletproof exact match
+        // e.g., "ACOS %" -> "acos", "Sales (30d)" -> "sales30d"
+        const cleanKey = k.toLowerCase().replace(/[^a-z0-9]/g, '');
+        normalizedRowKeys[cleanKey] = k;
     });
 
     for (const alias of aliases) {
-        const lookup = alias.trim().toLowerCase();
+        const lookup = alias.toLowerCase().replace(/[^a-z0-9]/g, '');
         if (normalizedRowKeys[lookup]) {
             const actualKey = normalizedRowKeys[lookup];
             const val = row[actualKey];