Fixed: Only upgrade anime version when release group is the same

src/NzbDrone.Core/DecisionEngine/Specifications/AnimeVersionUpgradeSpecification.cs

@@ -0,0 +1,67 @@
+using System.Linq;
+using NLog;
+using NzbDrone.Common;
+using NzbDrone.Core.IndexerSearch.Definitions;
+using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Tv;
+
+namespace NzbDrone.Core.DecisionEngine.Specifications
+{
+    public class AnimeVersionUpgradeSpecification : IDecisionEngineSpecification
+    {
+        private readonly QualityUpgradableSpecification _qualityUpgradableSpecification;
+        private readonly Logger _logger;
+
+        public AnimeVersionUpgradeSpecification(QualityUpgradableSpecification qualityUpgradableSpecification, Logger logger)
+        {
+            _qualityUpgradableSpecification = qualityUpgradableSpecification;
+            _logger = logger;
+        }
+
+        public string RejectionReason
+        {
+            get
+            {
+                return "Version upgrade for a different release group";
+            }
+        }
+
+        public RejectionType Type { get { return RejectionType.Permanent; } }
+
+        public virtual bool IsSatisfiedBy(RemoteEpisode subject, SearchCriteriaBase searchCriteria)
+        {
+            var releaseGroup = subject.ParsedEpisodeInfo.ReleaseGroup;
+
+            if (subject.Series.SeriesType != SeriesTypes.Anime)
+            {
+                return true;
+            }
+
+            foreach (var file in subject.Episodes.Where(c => c.EpisodeFileId != 0).Select(c => c.EpisodeFile.Value))
+            {
+                if (_qualityUpgradableSpecification.IsRevisionUpgrade(file.Quality, subject.ParsedEpisodeInfo.Quality))
+                {
+                    if (file.ReleaseGroup.IsNullOrWhiteSpace())
+                    {
+                        _logger.Debug("Unable to compare release group, existing file's release group is unknown");
+                        return false;
+                    }
+
+                    if (releaseGroup.IsNullOrWhiteSpace())
+                    {
+                        _logger.Debug("Unable to compare release group, release's release group is unknown");
+                        return false;
+                    }
+
+                    if (file.ReleaseGroup != releaseGroup)
+                    {
+                        _logger.Debug("Existing Release group is: {0} - release's release group is: {1}", file.ReleaseGroup, releaseGroup);
+                        return false;
+                    }
+                }
+            }
+
+            return true;
+        }
+    }
+}