From 2976acc480477b738953478bf9ff336ad70797c9 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 1 Jan 2026 18:45:09 +0000
Subject: [PATCH] Fix case-insensitive lookup for data package index file

Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>
---
 DiscordChatExporter.Cli.Tests/Utils/TempDir.cs    | 2 +-
 DiscordChatExporter.Cli.Tests/Utils/TempFile.cs   | 2 +-
 DiscordChatExporter.Core/Discord/Dump/DataDump.cs | 8 +++++++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/DiscordChatExporter.Cli.Tests/Utils/TempDir.cs b/DiscordChatExporter.Cli.Tests/Utils/TempDir.cs
index 4cae7ff0..e907755d 100644
--- a/DiscordChatExporter.Cli.Tests/Utils/TempDir.cs
+++ b/DiscordChatExporter.Cli.Tests/Utils/TempDir.cs
@@ -24,7 +24,7 @@ internal partial class TempDir
     {
         var dirPath = System.IO.Path.Combine(
             System.IO.Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
-            ?? Directory.GetCurrentDirectory(),
+                ?? Directory.GetCurrentDirectory(),
             "Temp",
             Guid.NewGuid().ToString()
         );
diff --git a/DiscordChatExporter.Cli.Tests/Utils/TempFile.cs b/DiscordChatExporter.Cli.Tests/Utils/TempFile.cs
index 1c6e79b3..0a686a65 100644
--- a/DiscordChatExporter.Cli.Tests/Utils/TempFile.cs
+++ b/DiscordChatExporter.Cli.Tests/Utils/TempFile.cs
@@ -24,7 +24,7 @@ internal partial class TempFile
     {
         var dirPath = System.IO.Path.Combine(
             System.IO.Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
-            ?? Directory.GetCurrentDirectory(),
+                ?? Directory.GetCurrentDirectory(),
             "Temp"
         );
 
diff --git a/DiscordChatExporter.Core/Discord/Dump/DataDump.cs b/DiscordChatExporter.Core/Discord/Dump/DataDump.cs
index be3deb1c..32dae081 100644
--- a/DiscordChatExporter.Core/Discord/Dump/DataDump.cs
+++ b/DiscordChatExporter.Core/Discord/Dump/DataDump.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO.Compression;
+using System.Linq;
 using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
@@ -42,7 +43,12 @@ public partial class DataDump
     {
         using var archive = ZipFile.OpenRead(zipFilePath);
 
-        var entry = archive.GetEntry("messages/index.json");
+        // Try to find the index file with case-insensitive search
+        // Discord changed the structure from "messages/index.json" to "Messages/index.json"
+        var entry = archive.Entries.FirstOrDefault(e =>
+            e.FullName.Equals("messages/index.json", StringComparison.OrdinalIgnoreCase)
+        );
+
         if (entry is null)
         {
             throw new InvalidOperationException(