Do not import episodes when destination doesn't have enough disk space

NzbDrone.Core/MediaFiles/EpisodeImport/Specifications/FreeSpaceSpecification.cs

@@ -0,0 +1,41 @@
+using System.IO;
+using System.Linq;
+using NLog;
+using NzbDrone.Common;
+using NzbDrone.Core.Organizer;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.MediaFiles.EpisodeImport.Specifications
+{
+    public class FreeSpaceSpecification : IImportDecisionEngineSpecification
+    {
+        private readonly IBuildFileNames _buildFileNames;
+        private readonly IDiskProvider _diskProvider;
+        private readonly Logger _logger;
+
+        public FreeSpaceSpecification(IBuildFileNames buildFileNames, IDiskProvider diskProvider,  Logger logger)
+        {
+            _buildFileNames = buildFileNames;
+            _diskProvider = diskProvider;
+            _logger = logger;
+        }
+
+        public string RejectionReason { get { return "Not enough free space"; } }
+
+        public bool IsSatisfiedBy(LocalEpisode localEpisode)
+        {
+            var newFileName = Path.GetFileNameWithoutExtension(localEpisode.Path);
+            var destinationFilename = _buildFileNames.BuildFilePath(localEpisode.Series, localEpisode.SeasonNumber, newFileName, Path.GetExtension(localEpisode.Path));
+            
+            var freeSpace = _diskProvider.GetAvilableSpace(destinationFilename);
+
+            if (freeSpace < localEpisode.Size)
+            {
+                _logger.Warn("Not enough free space to import: {0}", localEpisode);
+                return false;
+            }
+
+            return true;
+        }
+    }
+}