Fixed: Parsing of subtitle languages separated by dash

Closes #6494

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

@@ -441,6 +441,10 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].testtitle.forced.fra.ass", new[] { "forced" }, "testtitle", "French")]
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.forced.testtitle.ass", new[] { "forced" }, "testtitle", "French")]
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].forced.fra.testtitle.ass", new[] { "forced" }, "testtitle", "French")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].ru-something-else.srt", new string[0], "something-else", "Russian")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].Full Subtitles.eng.ass", new string[0], "Full Subtitles", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].mytitle - 1.en.ass", new string[0], "mytitle", "English")]
+        [TestCase("Name (2020) - S01E20 - [AAC 2.0].mytitle.en.ass", new string[0], "mytitle", "English")]
         public void should_parse_title_and_tags(string postTitle, string[] expectedTags, string expectedTitle, string expectedLanguage)
         {
             var subtitleTitleInfo = LanguageParser.ParseSubtitleLanguageInformation(postTitle);

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -29,9 +29,9 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex GermanDualLanguageRegex = new (@"(?<!WEB[-_. ]?)\bDL\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
         private static readonly Regex GermanMultiLanguageRegex = new (@"\bML\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex SubtitleLanguageRegex = new Regex(".+?([-_. ](?<tags>full|forced|foreign|default|cc|psdh|sdh))*[-_. ](?<iso_code>[a-z]{2,3})([-_. ](?<tags>full|forced|foreign|default|cc|psdh|sdh))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex SubtitleLanguageRegex = new Regex(".+?([-_. ](?<tags>forced|foreign|default|cc|psdh|sdh))*[-_. ](?<iso_code>[a-z]{2,3})([-_. ](?<tags>forced|foreign|default|cc|psdh|sdh))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex SubtitleLanguageTitleRegex = new Regex(@".+?(\.((?<tags1>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*\.(?<title>[^.]*)(\.((?<tags2>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex SubtitleLanguageTitleRegex = new Regex(@".+?(\.((?<tags1>forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*[-_. ](?<title>[^.]*)(\.((?<tags2>forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex SubtitleTitleRegex = new Regex(@"((?<title>.+) - )?(?<copy>(?<!\d+)\d{1,3}(?!\d+))$", RegexOptions.Compiled);