Fixed: Parsing of numeric only titles that include a year

Closes #4850

src/NzbDrone.Core.Test/ParserTests/ParserFixture.cs

@@ -35,6 +35,31 @@ namespace NzbDrone.Core.Test.ParserTests
             result.Should().Be(title.CleanSeriesTitle());
         }
 
+        [TestCase("Series S03E14 720p HDTV X264-DIMENSION", "Series")]
+        [TestCase("Series.S03E14.720p.HDTV.X264-DIMENSION", "Series")]
+        [TestCase("Series-S03E14-720p-HDTV-X264-DIMENSION", "Series")]
+        [TestCase("Series_S03E14_720p_HDTV_X264-DIMENSION", "Series")]
+        [TestCase("Series 2022 S03E14 720p HDTV X264-DIMENSION", "Series", 2022)]
+        [TestCase("Series (2022) S03E14 720p HDTV X264-DIMENSION", "Series", 2022)]
+        [TestCase("Series.2022.S03E14.720p.HDTV.X264-DIMENSION", "Series", 2022)]
+        [TestCase("Series-2022-S03E14-720p-HDTV-X264-DIMENSION", "Series", 2022)]
+        [TestCase("Series_2022_S03E14_720p_HDTV_X264-DIMENSION", "Series", 2022)]        
+        [TestCase("1234 S03E14 720p HDTV X264-DIMENSION", "1234")]
+        [TestCase("1234.S03E14.720p.HDTV.X264-DIMENSION", "1234")]
+        [TestCase("1234-S03E14-720p-HDTV-X264-DIMENSION", "1234")]
+        [TestCase("1234_S03E14_720p_HDTV_X264-DIMENSION", "1234")]
+        [TestCase("1234 2022 S03E14 720p HDTV X264-DIMENSION", "1234", 2022)]
+        [TestCase("1234 (2022) S03E14 720p HDTV X264-DIMENSION", "1234", 2022)]
+        [TestCase("1234.2022.S03E14.720p.HDTV.X264-DIMENSION", "1234", 2022)]
+        [TestCase("1234-2022-S03E14-720p-HDTV-X264-DIMENSION", "1234", 2022)]
+        [TestCase("1234_2022_S03E14_720p_HDTV_X264-DIMENSION", "1234", 2022)]
+        public void should_parse_series_title_info(string postTitle, string titleWithoutYear, int year = 0)
+        {
+            var seriesTitleInfo = Parser.Parser.ParseTitle(postTitle).SeriesTitleInfo;
+            seriesTitleInfo.TitleWithoutYear.Should().Be(titleWithoutYear);
+            seriesTitleInfo.Year.Should().Be(year);
+        }
+
         [Test]
         public void should_remove_accents_from_title()
         {

src/NzbDrone.Core/Parser/Parser.cs

@@ -455,7 +455,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex LanguageRegex = new Regex(@"(?:\W|_)(?<italian>\b(?:ita|italian)\b)|(?<german>german\b|videomann)|(?<flemish>flemish)|(?<greek>greek)|(?<french>(?:\W|_)(?:FR|VOSTFR)(?:\W|_))|(?<russian>\brus\b)|(?<dutch>nl\W?subs?)|(?<hungarian>\b(?:HUNDUB|HUN)\b)|(?<spanish>\b(?:español|castellano)\b)",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly Regex YearInTitleRegex = new Regex(@"^(?<title>.+?)(?:\W|_)?(?<year>\d{4})",
+        private static readonly Regex YearInTitleRegex = new Regex(@"^(?<title>.+?)[-_. ]+?\(?(?<year>\d{4})\)?",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         private static readonly Regex TitleComponentsRegex = new Regex(@"^(?:(?<title>.+?) \((?<title>.+?)\)|(?<title>.+?) \| (?<title>.+?))$",