Moved DecisionEngine to root of core.

NzbDrone.Core/DecisionEngine/UpgradePossibleSpecification.cs

@@ -0,0 +1,39 @@
+using System.Linq;
+using NLog;
+using NzbDrone.Core.Providers;
+using NzbDrone.Core.Repository;
+
+namespace NzbDrone.Core.DecisionEngine
+{
+    public class UpgradePossibleSpecification
+    {
+        private readonly QualityProvider _qualityProvider;
+        private static readonly Logger logger = LogManager.GetCurrentClassLogger();
+
+        public UpgradePossibleSpecification(QualityProvider qualityProvider)
+        {
+            _qualityProvider = qualityProvider;
+        }
+
+        public UpgradePossibleSpecification()
+        {
+            
+        }
+
+        public virtual bool IsSatisfiedBy(Episode subject)
+        {
+            //Used to check if the existing episode can be upgraded by searching (Before we search)
+            if (subject.EpisodeFileId == 0)
+                return true;
+
+            var profile = _qualityProvider.Get(subject.Series.QualityProfileId);
+
+
+            //TODO:How about proper?
+            if (subject.EpisodeFile.Quality >= profile.Cutoff)
+                return false;
+
+            return true; ;
+        }
+    }
+}