New: Parse releases with season and episode numbers separated by a period

Closes #6492

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

@@ -166,6 +166,8 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Series Title [HDTV 720p][Cap.101](website.com).mkv", "Series Title", 1, 1)]
         [TestCase("Босх: Спадок (S2E1) / Series: Legacy (S2E1) (2023) WEB-DL 1080p Ukr/Eng | sub Eng", "Series: Legacy", 2, 1)]
         [TestCase("Босх: Спадок / Series: Legacy / S2E1 of 10 (2023) WEB-DL 1080p Ukr/Eng | sub Eng", "Series: Legacy", 2, 1)]
+        [TestCase("Titles.s06e01.1999.BDRip.1080p.Ukr.Eng.AC3.Hurtom.TNU.Tenax555", "Titles", 6, 1)]
+        [TestCase("Titles.s06.01.1999.BDRip.1080p.Ukr.Eng.AC3.Hurtom.TNU.Tenax555", "Titles", 6, 1)]
 
         // [TestCase("", "", 0, 0)]
         public void should_parse_single_episode(string postTitle, string title, int seasonNumber, int episodeNumber)

src/NzbDrone.Core/Parser/Parser.cs

@@ -191,7 +191,7 @@ namespace NzbDrone.Core.Parser
                     RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 // Episodes with a title, Single episodes (S01E05, 1x05, etc) & Multi-episode (S01E05E06, S01E05-06, S01E05 E06, etc)
-                new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+S?(?<season>(?<!\d+)(?:\d{1,2})(?!\d+))(?:[ex]|\W[ex]){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)(?:[-_. ]|$)(?!\\)",
+                new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+S?(?<season>(?<!\d+)(?:\d{1,2})(?!\d+))(?:[ex]|\W[ex]){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)(?:[-_. ]|$)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 // Episodes with a title, 4 digit season number, Single episodes (S2016E05, etc) & Multi-episode (S2016E05E06, S2016E05-06, S2016E05 E06, etc)
@@ -202,6 +202,10 @@ namespace NzbDrone.Core.Parser
                 new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+(?<season>(?<!\d+)(?:\d{4})(?!\d+))(?:x|\Wx){1,2}(?<episode>\d{2,4}(?!\d+))(?:(?:\-|x|\Wx|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)\W?(?!\\)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
+                // Episodes with a title, Single episodes (s01.05)
+                new Regex(@"^(?<title>.+?)(?:[-_\W](?<![()\[!]))+S(?<season>(?<!\d+)(?:\d{2})(?!\d+))(?:\.)(?<episode>\d{2,3}(?!\d+))(?:[-_. ]|$)",
+                    RegexOptions.IgnoreCase | RegexOptions.Compiled),
+
                 // Multi-season pack
                 new Regex(@"^(?<title>.+?)(Complete Series)?[-_. ]+(?:S|(?:Season|Saison|Series|Stagione)[_. ])(?<season>(?<!\d+)(?:\d{1,2})(?!\d+))(?:[-_. ]{1}|[-_. ]{3})(?:S|(?:Season|Saison|Series|Stagione)[_. ])?(?<season>(?<!\d+)(?:\d{1,2})(?!\d+))",
                     RegexOptions.IgnoreCase | RegexOptions.Compiled),