3 files changed, 11 insertions, 36 deletions
diff --git a/Emby.Naming/AudioBook/AudioBookFilePathParser.cs b/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
index 5494df9d6..14edd6492 100644
--- a/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
+++ b/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
@@ -1,6 +1,6 @@
+#nullable enable
 #pragma warning disable CS1591
 
-using System;
 using System.Globalization;
 using System.IO;
 using System.Text.RegularExpressions;
@@ -19,12 +19,7 @@ namespace Emby.Naming.AudioBook
 
         public AudioBookFilePathParserResult Parse(string path)
         {
-            if (path == null)
-            {
-                throw new ArgumentNullException(nameof(path));
-            }
-
-            var result = new AudioBookFilePathParserResult();
+            AudioBookFilePathParserResult result = default;
             var fileName = Path.GetFileNameWithoutExtension(path);
             foreach (var expression in _options.AudioBookPartsExpressions)
             {
@@ -50,26 +45,14 @@ namespace Emby.Naming.AudioBook
                         {
                             if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
                             {
-                                result.ChapterNumber = intValue;
+                                result.PartNumber = intValue;
                             }
                         }
                     }
                 }
             }
 
-            /*var matches = _iRegexProvider.GetRegex("\\d+", RegexOptions.IgnoreCase).Matches(fileName);
-            if (matches.Count > 0)
-            {
-                if (!result.ChapterNumber.HasValue)
-                {
-                    result.ChapterNumber = int.Parse(matches[0].Groups[0].Value);
-                }
-                if (matches.Count > 1)
-                {
-                    result.PartNumber = int.Parse(matches[matches.Count - 1].Groups[0].Value);
-                }
-            }*/
-            result.Success = result.PartNumber.HasValue || result.ChapterNumber.HasValue;
+            result.Success = result.ChapterNumber.HasValue || result.PartNumber.HasValue;
 
             return result;
         }
diff --git a/Emby.Naming/AudioBook/AudioBookFilePathParserResult.cs b/Emby.Naming/AudioBook/AudioBookFilePathParserResult.cs
index e28a58db7..7bfc4479d 100644
--- a/Emby.Naming/AudioBook/AudioBookFilePathParserResult.cs
+++ b/Emby.Naming/AudioBook/AudioBookFilePathParserResult.cs
@@ -1,8 +1,9 @@
+#nullable enable
 #pragma warning disable CS1591
 
 namespace Emby.Naming.AudioBook
 {
-    public class AudioBookFilePathParserResult
+    public struct AudioBookFilePathParserResult
     {
         public int? PartNumber { get; set; }
 
diff --git a/Emby.Naming/AudioBook/AudioBookResolver.cs b/Emby.Naming/AudioBook/AudioBookResolver.cs
index 5466b4637..5807d4688 100644
--- a/Emby.Naming/AudioBook/AudioBookResolver.cs
+++ b/Emby.Naming/AudioBook/AudioBookResolver.cs
@@ -1,3 +1,4 @@
+#nullable enable
 #pragma warning disable CS1591
 
 using System;
@@ -16,21 +17,11 @@ namespace Emby.Naming.AudioBook
             _options = options;
         }
 
-        public AudioBookFileInfo ParseFile(string path)
+        public AudioBookFileInfo? Resolve(string path, bool isDirectory = false)
         {
-            return Resolve(path, false);
-        }
-
-        public AudioBookFileInfo ParseDirectory(string path)
-        {
-            return Resolve(path, true);
-        }
-
-        public AudioBookFileInfo Resolve(string path, bool isDirectory = false)
-        {
-            if (string.IsNullOrEmpty(path))
+            if (path.Length == 0)
             {
-                throw new ArgumentNullException(nameof(path));
+                throw new ArgumentException("String can't be empty.", nameof(path));
             }
 
             // TODO
@@ -55,8 +46,8 @@ namespace Emby.Naming.AudioBook
             {
                 Path = path,
                 Container = container,
-                PartNumber = parsingResult.PartNumber,
                 ChapterNumber = parsingResult.ChapterNumber,
+                PartNumber = parsingResult.PartNumber,
                 IsDirectory = isDirectory
             };
         }