From b5f0760db8dba96e9edd67d4b9c914cf25c3d26a Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Mon, 22 May 2023 22:48:09 +0200
Subject: Use RegexGenerator where possible

---
 Emby.Naming/Audio/AlbumParser.cs       | 13 ++++++-------
 Emby.Naming/TV/SeriesResolver.cs       |  7 ++++---
 Emby.Naming/Video/VideoListResolver.cs | 12 ++++++++----
 3 files changed, 18 insertions(+), 14 deletions(-)

(limited to 'Emby.Naming')

diff --git a/Emby.Naming/Audio/AlbumParser.cs b/Emby.Naming/Audio/AlbumParser.cs
index 86a564153..73424a134 100644
--- a/Emby.Naming/Audio/AlbumParser.cs
+++ b/Emby.Naming/Audio/AlbumParser.cs
@@ -10,7 +10,7 @@ namespace Emby.Naming.Audio
     /// <summary>
     /// Helper class to determine if Album is multipart.
     /// </summary>
-    public class AlbumParser
+    public partial class AlbumParser
     {
         private readonly NamingOptions _options;
 
@@ -23,6 +23,9 @@ namespace Emby.Naming.Audio
             _options = options;
         }
 
+        [GeneratedRegex(@"([-\.\(\)]|\s+)")]
+        private static partial Regex CleanRegex();
+
         /// <summary>
         /// Function that determines if album is multipart.
         /// </summary>
@@ -42,13 +45,9 @@ namespace Emby.Naming.Audio
 
             // Normalize
             // Remove whitespace
-            filename = filename.Replace('-', ' ');
-            filename = filename.Replace('.', ' ');
-            filename = filename.Replace('(', ' ');
-            filename = filename.Replace(')', ' ');
-            filename = Regex.Replace(filename, @"\s+", " ");
+            filename = CleanRegex().Replace(filename, " ");
 
-            ReadOnlySpan<char> trimmedFilename = filename.TrimStart();
+            ReadOnlySpan<char> trimmedFilename = filename.AsSpan().TrimStart();
 
             foreach (var prefix in _options.AlbumStackingPrefixes)
             {
diff --git a/Emby.Naming/TV/SeriesResolver.cs b/Emby.Naming/TV/SeriesResolver.cs
index 307a84096..d8fa41743 100644
--- a/Emby.Naming/TV/SeriesResolver.cs
+++ b/Emby.Naming/TV/SeriesResolver.cs
@@ -7,14 +7,15 @@ namespace Emby.Naming.TV
     /// <summary>
     /// Used to resolve information about series from path.
     /// </summary>
-    public static class SeriesResolver
+    public static partial class SeriesResolver
     {
         /// <summary>
         /// Regex that matches strings of at least 2 characters separated by a dot or underscore.
         /// Used for removing separators between words, i.e turns "The_show" into "The show" while
         /// preserving namings like "S.H.O.W".
         /// </summary>
-        private static readonly Regex _seriesNameRegex = new Regex(@"((?<a>[^\._]{2,})[\._]*)|([\._](?<b>[^\._]{2,}))", RegexOptions.Compiled);
+        [GeneratedRegex(@"((?<a>[^\._]{2,})[\._]*)|([\._](?<b>[^\._]{2,}))")]
+        private static partial Regex SeriesNameRegex();
 
         /// <summary>
         /// Resolve information about series from path.
@@ -37,7 +38,7 @@ namespace Emby.Naming.TV
 
             if (!string.IsNullOrEmpty(seriesName))
             {
-                seriesName = _seriesNameRegex.Replace(seriesName, "${a} ${b}").Trim();
+                seriesName = SeriesNameRegex().Replace(seriesName, "${a} ${b}").Trim();
             }
 
             return new SeriesInfo(path)
diff --git a/Emby.Naming/Video/VideoListResolver.cs b/Emby.Naming/Video/VideoListResolver.cs
index 6209cd46f..51f29cf08 100644
--- a/Emby.Naming/Video/VideoListResolver.cs
+++ b/Emby.Naming/Video/VideoListResolver.cs
@@ -12,9 +12,13 @@ namespace Emby.Naming.Video
     /// <summary>
     /// Resolves alternative versions and extras from list of video files.
     /// </summary>
-    public static class VideoListResolver
+    public static partial class VideoListResolver
     {
-        private static readonly Regex _resolutionRegex = new Regex("[0-9]{2}[0-9]+[ip]", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        [GeneratedRegex("[0-9]{2}[0-9]+[ip]", RegexOptions.IgnoreCase)]
+        private static partial Regex ResolutionRegex();
+
+        [GeneratedRegex(@"^\[([^]]*)\]")]
+        private static partial Regex CheckMultiVersionRegex();
 
         /// <summary>
         /// Resolves alternative versions and extras from list of video files.
@@ -131,7 +135,7 @@ namespace Emby.Naming.Video
 
             if (videos.Count > 1)
             {
-                var groups = videos.GroupBy(x => _resolutionRegex.IsMatch(x.Files[0].FileNameWithoutExtension)).ToList();
+                var groups = videos.GroupBy(x => ResolutionRegex().IsMatch(x.Files[0].FileNameWithoutExtension)).ToList();
                 videos.Clear();
                 foreach (var group in groups)
                 {
@@ -201,7 +205,7 @@ namespace Emby.Naming.Video
             // The CleanStringParser should have removed common keywords etc.
             return testFilename.IsEmpty
                    || testFilename[0] == '-'
-                   || Regex.IsMatch(testFilename, @"^\[([^]]*)\]", RegexOptions.Compiled);
+                   || CheckMultiVersionRegex().IsMatch(testFilename);
         }
     }
 }
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