Release group parsing improvements

Fixed: Clean title before parsing release group (remove -RP & -NZBGeek)
Fixed: Parse subgroup from start of file name when inside square brackets

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

@@ -41,10 +41,10 @@ namespace NzbDrone.Core.Test.ParserTests
             },
             new object[]
             {
-                @"C:\Test\Weeds.S01E10.DVDRip.XviD-NZBgeek\AHFMZXGHEWD660.mkv".AsOsAgnostic(),
+                @"C:\Test\Weeds.S01E10.DVDRip.XviD-SONARR\AHFMZXGHEWD660.mkv".AsOsAgnostic(),
                 "weeds",
                 Quality.DVD,
-                "NZBgeek"
+                "SONARR"
             },
             new object[]
             {

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

@@ -25,6 +25,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Simpsons 10x11 - Wild Barts Cant Be Broken [rl].avi", null)]
         [TestCase("[ www.Torrenting.com ] - Revenge.S03E14.720p.HDTV.X264-DIMENSION", "DIMENSION")]
         [TestCase("Seed S02E09 HDTV x264-2HD [eztv]-[rarbg.com]", "2HD")]
+        //[TestCase("", "")]
         public void should_parse_release_group(string title, string expected)
         {
             Parser.Parser.ParseReleaseGroup(title).Should().Be(expected);
@@ -39,9 +40,25 @@ namespace NzbDrone.Core.Test.ParserTests
         }
 
         [TestCase("The.Longest.Mystery.S02E04.720p.WEB-DL.AAC2.0.H.264-EVL-RP", "EVL")]
+        [TestCase("Lost.S04E04.720p.BluRay.x264-xHD-NZBgeek", "xHD")]
+        [TestCase("Blue.Bloods.S05E11.720p.HDTV.X264-DIMENSION-NZBgeek", "DIMENSION")]
+        [TestCase("Lost.S04E04.720p.BluRay.x264-xHD-1", "xHD")]
+        [TestCase("Blue.Bloods.S05E11.720p.HDTV.X264-DIMENSION-1", "DIMENSION")]
         public void should_not_include_repost_in_release_group(string title, string expected)
         {
             Parser.Parser.ParseReleaseGroup(title).Should().Be(expected);
         }
+
+        [TestCase("[FFF] Invaders of the Rokujouma!! - S01E11 - Someday, With Them", "FFF")]
+        [TestCase("[HorribleSubs] Invaders of the Rokujouma!! - S01E12 - Invasion Going Well!!", "HorribleSubs")]
+        [TestCase("[Anime-Koi] Barakamon - S01E06 - Guys From Tokyo", "Anime-Koi")]
+        [TestCase("[Anime-Koi] Barakamon - S01E07 - A High-Grade Fish", "Anime-Koi")]
+        [TestCase("[Anime-Koi] Kami-sama Hajimemashita 2 - 01 [h264-720p][28D54E2C]", "Anime-Koi")]
+        //[TestCase("Tokyo.Ghoul.02x01.013.HDTV-720p-Anime-Koi", "Anime-Koi")]
+        //[TestCase("", "")]
+        public void should_parse_anime_release_groups(string title, string expected)
+        {
+            Parser.Parser.ParseReleaseGroup(title).Should().Be(expected);
+        }
     }
 }

src/NzbDrone.Core/Parser/Parser.cs

@@ -165,9 +165,15 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex SixDigitAirDateRegex = new Regex(@"(?<=[_.-])(?<airdate>(?<!\d)(?<airyear>[1-9]\d{1})(?<airmonth>[0-1][0-9])(?<airday>[0-3][0-9]))(?=[_.-])",
                                                                         RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
+        private static readonly Regex CleanReleaseGroupRegex = new Regex(@"^(\[\s.+?\s\])|-(RP|1|NZBGeek)$",
+                                                                RegexOptions.IgnoreCase | RegexOptions.Compiled);
+
         private static readonly Regex ReleaseGroupRegex = new Regex(@"-(?<releasegroup>[a-z0-9]+)\b(?<!WEB-DL|480p|720p|1080p)",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
+        private static readonly Regex AnimeReleaseGroupRegex = new Regex(@"^(?:\[(?<subgroup>(?<!\s).+?(?!\s))\](?:_|-|\s|\.)?)",
+                                                                RegexOptions.IgnoreCase | RegexOptions.Compiled);
+
         private static readonly Regex LanguageRegex = new Regex(@"(?:\W|_)(?<italian>\bita\b|italian)|(?<german>german\b|videomann)|(?<flemish>flemish)|(?<greek>greek)|(?<french>(?:\W|_)(?:FR|VOSTFR)(?:\W|_))|(?<russian>\brus\b)|(?<dutch>nl\W?subs?)",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
@@ -356,7 +362,14 @@ namespace NzbDrone.Core.Parser
         {
             title = title.Trim();
             title = RemoveFileExtension(title);
-            title = title.TrimEnd("-RP");
+            title = CleanReleaseGroupRegex.Replace(title, "");
+
+            var animeMatch = AnimeReleaseGroupRegex.Match(title);
+
+            if (animeMatch.Success)
+            {
+                return animeMatch.Groups["subgroup"].Value;
+            }
 
             var matches = ReleaseGroupRegex.Matches(title);