New: Parsing of Japanese variety shows

Closes #5279

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

@@ -1,3 +1,4 @@
+using System;
 using System.Linq;
 using FluentAssertions;
 using NUnit.Framework;
@@ -167,5 +168,24 @@ namespace NzbDrone.Core.Test.ParserTests
             result.AbsoluteEpisodeNumbers.Should().BeEmpty();
             result.FullSeason.Should().BeFalse();
         }
+
+        [TestCase("221208 ABC123 Series Title Season 39 ep11.mp4", "ABC123 Series Title", 39, 11)]
+        [TestCase("221208 ABC123 Series Title ep34[1080p60 H264].mp4", "ABC123 Series Title", 1, 34)]
+        [TestCase("221205 ABC123 17研究所！ #17.ts", "ABC123 17研究所！", 1, 17)]
+        [TestCase("221201 Series Title! ABC123 ep219[720p.h264].mp4", "Series Title! ABC123", 1, 219)]
+        [TestCase("221206 Series Title! ep08(Tanaka Miku).ts", "Series Title!", 1, 8)]
+        [TestCase("210810 ABC123 Series Title ep05.mp4", "ABC123 Series Title", 1, 5)]
+        [TestCase("221204 乃木坂工事中 ep389.mp4", "乃木坂工事中", 1, 389)]
+        public void should_parse_japanese_variety_show_format(string postTitle, string title, int seasonNumber, int episodeNumber)
+        {
+            var result = Parser.Parser.ParseTitle(postTitle);
+            result.Should().NotBeNull();
+            result.EpisodeNumbers.Should().HaveCount(1);
+            result.SeasonNumber.Should().Be(seasonNumber);
+            result.EpisodeNumbers.First().Should().Be(episodeNumber);
+            result.SeriesTitle.Should().Be(title);
+            result.AbsoluteEpisodeNumbers.Should().BeEmpty();
+            result.FullSeason.Should().BeFalse();
+        }
     }
 }

src/NzbDrone.Core/Parser/Parser.cs

@@ -271,6 +271,10 @@ namespace NzbDrone.Core.Parser
                 new Regex(@"^(?:\[(?<subgroup>.+?)\][-_. ]?)(?<title>.+?)[-_. ]+?\[(?<absoluteepisode>\d{2,3}(\.\d{1,2})?(?!\d+))\]",
                     RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
+                // Japanese variety shows with leading date
+                new Regex(@"^(?<airyear>\d{2})(?<airmonth>[0-1][0-9])(?<airday>[0-3][0-9])(?![-_. ]+[0-3][0-9])[-_. ](?<title>.+?)[-_. ](?:Season[-_. ]?(?<season>\d{1,2})[-_. ])?(?:ep|#)(?<episode>\d{2,3})",
+                    RegexOptions.IgnoreCase | RegexOptions.Compiled),
+
                 // Season only releases
                 new Regex(@"^(?<title>.+?)[-_. ]+?(?:S|Season|Saison|Series)[-_. ]?(?<season>\d{1,2}(?![-_. ]?\d+))(?:[-_. ]|$)+(?<extras>EXTRAS|SUBPACK)?(?!\\)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),