New: Rewrite of download decision engine.

NzbDrone.Core/Providers/DecisionEngine/AllowedDownloadSpecification.cs

@@ -0,0 +1,42 @@
+using System.Linq;
+using NLog;
+using Ninject;
+using NzbDrone.Core.Model;
+
+namespace NzbDrone.Core.Providers.DecisionEngine
+{
+    public class AllowedDownloadSpecification
+    {
+        private readonly QualityAllowedByProfileSpecification _qualityAllowedByProfileSpecification;
+        private readonly UpgradeDiskSpecification _upgradeDiskSpecification;
+        private readonly AcceptableSizeSpecification _acceptableSizeSpecification;
+        private readonly AlreadyInQueueSpecification _alreadyInQueueSpecification;
+        private static readonly Logger logger = LogManager.GetCurrentClassLogger();
+
+        [Inject]
+        public AllowedDownloadSpecification(QualityAllowedByProfileSpecification qualityAllowedByProfileSpecification,
+            UpgradeDiskSpecification upgradeDiskSpecification, AcceptableSizeSpecification acceptableSizeSpecification,
+            AlreadyInQueueSpecification alreadyInQueueSpecification)
+        {
+            _qualityAllowedByProfileSpecification = qualityAllowedByProfileSpecification;
+            _upgradeDiskSpecification = upgradeDiskSpecification;
+            _acceptableSizeSpecification = acceptableSizeSpecification;
+            _alreadyInQueueSpecification = alreadyInQueueSpecification;
+        }
+
+        public AllowedDownloadSpecification()
+        {
+        }
+
+        public virtual bool IsSatisfiedBy(EpisodeParseResult subject)
+        {
+            if (!_qualityAllowedByProfileSpecification.IsSatisfiedBy(subject)) return false;
+            if (!_upgradeDiskSpecification.IsSatisfiedBy(subject)) return false;
+            if (!_acceptableSizeSpecification.IsSatisfiedBy(subject)) return false;
+            if (_alreadyInQueueSpecification.IsSatisfiedBy(subject)) return false;
+
+            logger.Debug("Episode {0} is needed", subject);
+            return true;
+        }
+    }
+}