From c387aee8fe307203fc9394e26e763d70b7abb1b3 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Mon, 8 Sep 2025 01:14:58 +0100
Subject: [PATCH] [HA] Implement GetEntryNumber.

---
 Aaru.Archives/Ha/Files.cs         | 26 ++++++++++++++++++++++++++
 Aaru.Archives/Ha/Unimplemented.cs |  4 ----
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/Aaru.Archives/Ha/Files.cs b/Aaru.Archives/Ha/Files.cs
index d517d0649..a0fb3fe53 100644
--- a/Aaru.Archives/Ha/Files.cs
+++ b/Aaru.Archives/Ha/Files.cs
@@ -1,3 +1,4 @@
+using System;
 using Aaru.CommonTypes.Enums;
 
 namespace Aaru.Archives;
@@ -20,5 +21,30 @@ public sealed partial class Ha
         return ErrorNumber.NoError;
     }
 
+    /// <inheritdoc />
+    public ErrorNumber GetEntryNumber(string fileName, bool caseInsensitiveMatch, out int entryNumber)
+    {
+        entryNumber = -1;
+
+        if(!Opened) return ErrorNumber.NotOpened;
+
+        if(entryNumber < 0 || entryNumber >= _entries.Count) return ErrorNumber.OutOfRange;
+
+        StringComparison comparison = caseInsensitiveMatch
+                                          ? StringComparison.CurrentCultureIgnoreCase
+                                          : StringComparison.CurrentCulture;
+
+        for(int i = 0, count = _entries.Count; i < count; i++)
+        {
+            if(!_entries[i].Filename.Equals(fileName, comparison)) continue;
+
+            entryNumber = i;
+
+            return ErrorNumber.NoError;
+        }
+
+        return ErrorNumber.NoSuchFile;
+    }
+
 #endregion
 }
\ No newline at end of file
diff --git a/Aaru.Archives/Ha/Unimplemented.cs b/Aaru.Archives/Ha/Unimplemented.cs
index 4ac88cfd5..02a207a19 100644
--- a/Aaru.Archives/Ha/Unimplemented.cs
+++ b/Aaru.Archives/Ha/Unimplemented.cs
@@ -11,10 +11,6 @@ public sealed partial class Ha
 {
 #region IArchive Members
 
-    /// <inheritdoc />
-    public ErrorNumber GetEntryNumber(string fileName, bool caseInsensitiveMatch, out int entryNumber) =>
-        throw new NotImplementedException();
-
     /// <inheritdoc />
     public ErrorNumber GetCompressedSize(int entryNumber, out long length) => throw new NotImplementedException();