From 64173a21683653372bb0877df87f99ecda5942e1 Mon Sep 17 00:00:00 2001
From: cogwheel0 <172976095+cogwheel0@users.noreply.github.com>
Date: Thu, 13 Nov 2025 12:39:09 +0530
Subject: [PATCH] feat(file-attachment): improve base64 image data URL parsing
 validation

---
 .../chat/services/file_attachment_service.dart  | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/features/chat/services/file_attachment_service.dart b/lib/features/chat/services/file_attachment_service.dart
index bf03d6b..e309985 100644
--- a/lib/features/chat/services/file_attachment_service.dart
+++ b/lib/features/chat/services/file_attachment_service.dart
@@ -180,8 +180,21 @@ class FileAttachmentService {
     int? maxHeight,
   ) async {
     try {
-      // Decode base64 data
-      final data = imageDataUrl.split(',')[1];
+      // Decode base64 data - with validation
+      final parts = imageDataUrl.split(',');
+      if (parts.length < 2) {
+        DebugLogger.log(
+          'Invalid data URL format - missing comma separator',
+          scope: 'attachments/image',
+          data: {
+            'urlPrefix': imageDataUrl.length > 50
+                ? imageDataUrl.substring(0, 50)
+                : imageDataUrl,
+          },
+        );
+        return imageDataUrl; // Return original if format is invalid
+      }
+      final data = parts[1];
       final bytes = base64Decode(data);
 
       // Decode image