support series that are numeric only

updates SeriesResolver to handle series names that only contain numbers such as 1923.

Emby.Naming/TV/SeriesResolver.cs

@@ -17,6 +17,13 @@ namespace Emby.Naming.TV
         [GeneratedRegex(@"((?<a>[^\._]{2,})[\._]*)|([\._](?<b>[^\._]{2,}))")]
         private static partial Regex SeriesNameRegex();
 
+        /// <summary>
+        /// Regex that matches titles with year in parentheses, optionally preceded by a minus sign.
+        /// Captures the title (which may be numeric) before the year.
+        /// </summary>
+        [GeneratedRegex(@"^-?(?<title>.+?)\s*\(\d{4}\)")]
+        private static partial Regex TitleWithYearRegex();
+
         /// <summary>
         /// Resolve information about series from path.
         /// </summary>
@@ -27,6 +34,20 @@ namespace Emby.Naming.TV
         {
             string seriesName = Path.GetFileName(path);
 
+            // First check if the filename matches a title with year pattern (handles numeric titles)
+            if (!string.IsNullOrEmpty(seriesName))
+            {
+                var titleWithYearMatch = TitleWithYearRegex().Match(seriesName);
+                if (titleWithYearMatch.Success)
+                {
+                    seriesName = titleWithYearMatch.Groups["title"].Value.Trim();
+                    return new SeriesInfo(path)
+                    {
+                        Name = seriesName
+                    };
+                }
+            }
+
             SeriesPathParserResult result = SeriesPathParser.Parse(options, path);
             if (result.Success)
             {

tests/Jellyfin.Naming.Tests/TV/SeriesResolverTests.cs

@@ -19,6 +19,8 @@ namespace Jellyfin.Naming.Tests.TV
         [InlineData("/some/path/The Show", "The Show")]
         [InlineData("/some/path/The Show s02e10 720p hdtv", "The Show")]
         [InlineData("/some/path/The Show s02e10 the episode 720p hdtv", "The Show")]
+        [InlineData("/some/path/1923 (2022)", "1923")]
+        [InlineData("/some/path/-1923 (2022)", "1923")]
         public void SeriesResolverResolveTest(string path, string name)
         {
             var res = SeriesResolver.Resolve(_namingOptions, path);