Fixed: filter duplicated episodes returned from Trakt

http://support.trakt.tv/forums/188762-general/suggestions/4430690-anger-management-duplicate-episode

src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics;
 using System.Globalization;
 using System.Runtime.InteropServices;
 
@@ -50,6 +51,7 @@ namespace NzbDrone.Common.EnvironmentInfo
         [DllImport("libc")]
         static extern int uname(IntPtr buf);
 
+        [DebuggerStepThrough]
         static bool IsRunningOnMac()
         {
             var buf = IntPtr.Zero;

src/NzbDrone.Core.Test/MetadataSourceTests/TraktProxyFixture.cs

@@ -103,8 +103,8 @@ namespace NzbDrone.Core.Test.MetadataSourceTests
         {
             episodes.Should().NotBeEmpty();
 
-            episodes.GroupBy(e => e.SeasonNumber.ToString("000") + e.EpisodeNumber.ToString("000"))
-                .Max(e => e.Count()).Should().Be(1);
+            var episodeGroup=  episodes.GroupBy(e => e.SeasonNumber.ToString("000") + e.EpisodeNumber.ToString("000"));
+            episodeGroup.Should().OnlyContain(c=>c.Count() == 1);
 
             episodes.Should().Contain(c => c.SeasonNumber > 0);
             episodes.Should().Contain(c => !string.IsNullOrWhiteSpace(c.Overview));

src/NzbDrone.Core/MetadataSource/TraktProxy.cs

@@ -110,22 +110,21 @@ namespace NzbDrone.Core.MetadataSource
 
             var response = _httpClient.Get<Show>(request).Resource;
 
-            /*
+            var episodes = response.seasons.SelectMany(c => c.episodes).Select(MapEpisode);
 
-                        var client = BuildClient("show", "summary");
-                        var restRequest = new RestRequest(tvdbSeriesId + "/extended");
-                        var response = client.ExecuteAndValidate<Show>(restRequest);*/
-
-            var episodes = response.seasons.SelectMany(c => c.episodes).Select(MapEpisode).ToList();
+            episodes = RemoveDuplicates(episodes);
+               
             var series = MapSeries(response);
 
-            return new Tuple<Series, List<Episode>>(series, episodes);
+            return new Tuple<Series, List<Episode>>(series, episodes.ToList());
+        }
+
+        private static IEnumerable<Episode> RemoveDuplicates(IEnumerable<Episode> episodes)
+        {
+            //http://support.trakt.tv/forums/188762-general/suggestions/4430690-anger-management-duplicate-episode
+            var episodeGroup = episodes.GroupBy(e => e.SeasonNumber.ToString("0000") + e.EpisodeNumber.ToString("0000"));
+            return episodeGroup.Select(g => g.First());
         }
-        /*
-                private static IRestClient BuildClient(string resource, string method)
-                {
-                    return RestClientFactory.BuildClient(string.Format("http://api.trakt.tv/{0}/{1}.json/bc3c2c460f22cbb01c264022b540e191", resource, method));
-                }*/
 
         private static Series MapSeries(Show show)
         {