Fixed: Migrating subtitle files with unexpectedly large number at end

Closes #6409

src/NzbDrone.Core.Test/Datastore/Migration/198_parse_titles_from_existing_subtitle_filesFixture.cs

@@ -38,6 +38,7 @@ namespace NzbDrone.Core.Test.Datastore.Migration
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].3.forced.eng.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].eng.forced.3.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
         [TestCase("Name (2020) - S01E20 - [AAC 2.0].fra.default.3.forced.ass", "Name (2020)/Season 1/Name (2020) - S01E20 - [AAC 2.0].mkv", null, 3)]
+        [TestCase("Name (2020) - Name.2020.S01E03.REAL.PROPER.1080p.HEVC.x265-MeGusta - 0609901d2ea34acd81c9030980406065.en.forced.srt", "Name (2020)/Season 1/Name (2020) - Name.2020.S01E03.REAL.PROPER.1080p.HEVC.x265-MeGusta - 0609901d2ea34acd81c9030980406065.mkv", null, 0)]
         public void should_process_file_with_missing_title(string subtitlePath, string episodePath, string title, int copy)
         {
             var now = DateTime.UtcNow;

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -31,9 +31,9 @@ namespace NzbDrone.Core.Parser
 
         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 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})))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex SubtitleLanguageTitleRegex = new Regex(@".+?(\.((?<tags1>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*\.(?<title>[^.]*)(\.((?<tags2>full|forced|foreign|default|cc|psdh|sdh)|(?<iso_code>[a-z]{2,3})))*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex SubtitleTitleRegex = new Regex("((?<title>.+) - )?(?<copy>\\d+)$", RegexOptions.Compiled);
+        private static readonly Regex SubtitleTitleRegex = new Regex(@"((?<title>.+) - )?(?<copy>(?<!\d+)\d{1,3}(?!\d+))$", RegexOptions.Compiled);
 
         public static List<Language> ParseLanguages(string title)
         {