From e0db17a9354ff511c31c7bcf02c41d868ed91c5a Mon Sep 17 00:00:00 2001
From: cvium <clausvium@gmail.com>
Date: Sun, 7 Mar 2021 22:49:31 +0100
Subject: do not throw ArgumentNullException in TryCleanString

---
 Emby.Naming/Video/CleanStringParser.cs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'Emby.Naming/Video/CleanStringParser.cs')

diff --git a/Emby.Naming/Video/CleanStringParser.cs b/Emby.Naming/Video/CleanStringParser.cs
index 09a0cd189..deeea4dda 100644
--- a/Emby.Naming/Video/CleanStringParser.cs
+++ b/Emby.Naming/Video/CleanStringParser.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Text.RegularExpressions;
 
 namespace Emby.Naming.Video
@@ -16,7 +17,7 @@ namespace Emby.Naming.Video
         /// <param name="expressions">List of regex to parse name and year from.</param>
         /// <param name="newName">Parsing result string.</param>
         /// <returns>True if parsing was successful.</returns>
-        public static bool TryClean(string name, IReadOnlyList<Regex> expressions, out ReadOnlySpan<char> newName)
+        public static bool TryClean(string name, IReadOnlyList<Regex> expressions, [NotNullWhen(true)] out ReadOnlySpan<char> newName)
         {
             var len = expressions.Count;
             for (int i = 0; i < len; i++)
@@ -31,8 +32,14 @@ namespace Emby.Naming.Video
             return false;
         }
 
-        private static bool TryClean(string name, Regex expression, out ReadOnlySpan<char> newName)
+        private static bool TryClean(string name, Regex expression, [NotNullWhen(true)] out ReadOnlySpan<char> newName)
         {
+            if (string.IsNullOrEmpty(name))
+            {
+                newName = null;
+                return false;
+            }
+
             var match = expression.Match(name);
             int index = match.Index;
             if (match.Success && index != 0)
-- 
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