Truncating TvDb Overviews actually works. Stupid Recaps.

NzbDrone.Core.Test/FluentTest.cs

@@ -191,5 +191,33 @@ namespace NzbDrone.Core.Test
             //Resolve
             result.Should().Be(10);
         }
+
+        [Test]
+        public void Truncate_should_truncate_strings_to_max_specified_number_of_bytes()
+        {
+            //Setup
+            var str = File.ReadAllText(@"Files\LongOverview.txt");
+
+            //Act
+            var resultString = str.Truncate(1000);
+
+            //Resolve
+            var result =  new System.Text.UTF8Encoding().GetBytes(resultString);
+            result.Length.Should().BeLessOrEqualTo(1000);
+        }
+
+        [Test]
+        public void Truncate_should_not_truncate_string_shorter_than_max_bytes()
+        {
+            //Setup
+            var str = "Hello World";
+
+            //Act
+            var resultString = str.Truncate(1000);
+
+            //Resolve
+            var result = new System.Text.UTF8Encoding().GetBytes(resultString);
+            result.Length.Should().Be(11);
+        }
     }
 }

NzbDrone.Core.Test/ProviderTests/EpisodeProviderTest.cs

@@ -480,48 +480,6 @@ namespace NzbDrone.Core.Test.ProviderTests
             result.Where(e => e.Ignored).Should().HaveCount(episodeCount);
         }
 
-        [Test]
-        public void RefreshEpisodeInfo_should_trim_overview_to_4000_characters()
-        {
-            //Arrange
-            const int seriesId = 71663;
-            const int episodeCount = 10;
-
-            var longOverview = File.ReadAllText(@".\Files\LongOverview.txt");
-
-            var fakeEpisodes = Builder<TvdbSeries>.CreateNew().With(
-                c => c.Episodes =
-                     new List<TvdbEpisode>(Builder<TvdbEpisode>.CreateListOfSize(episodeCount).
-                                               All()
-                                               .With(l => l.Language = new TvdbLanguage(0, "eng", "a"))
-                                               .With(e => e.SeasonNumber = 0)
-                                               .TheLast(1)
-                                               .With(e => e.Overview = longOverview)
-                                               .Build())
-                ).With(c => c.Id = seriesId).Build();
-
-            var fakeSeries = Builder<Series>.CreateNew().With(c => c.SeriesId = seriesId).Build();
-
-            WithRealDb();
-
-            Db.Insert(fakeSeries);
-
-            Mocker.GetMock<TvDbProvider>()
-                .Setup(c => c.GetSeries(seriesId, true))
-                .Returns(fakeEpisodes);
-
-            Mocker.GetMock<SeasonProvider>()
-                .Setup(s => s.IsIgnored(seriesId, 0))
-                .Returns(false);
-
-            //Act
-            Mocker.Resolve<EpisodeProvider>().RefreshEpisodeInfo(fakeSeries);
-
-            //Assert
-            var result = Mocker.Resolve<EpisodeProvider>().GetEpisodeBySeries(seriesId).ToList();
-            result.Should().HaveCount(episodeCount);
-        }
-
         [Test]
         public void new_episodes_only_calls_Insert()
         {

NzbDrone.Core/Fluent.cs

@@ -62,5 +62,30 @@ namespace NzbDrone.Core
 
             return intList.Max();
         }
+
+        public static string Truncate(this string s, int maxLength)
+        {
+            if (Encoding.UTF8.GetByteCount(s) <= maxLength)
+                return s;
+            var cs = s.ToCharArray();
+            int length = 0;
+            int i = 0;
+            while (i < cs.Length)
+            {
+                int charSize = 1;
+                if (i < (cs.Length - 1) && char.IsSurrogate(cs[i]))
+                    charSize = 2;
+                int byteSize = Encoding.UTF8.GetByteCount(cs, i, charSize);
+                if ((byteSize + length) <= maxLength)
+                {
+                    i = i + charSize;
+                    length += byteSize;
+                }
+                else
+                    break;
+            }
+            return s.Substring(0, i);
+        }
+
     }
 }

NzbDrone.Core/Providers/EpisodeProvider.cs

@@ -328,10 +328,7 @@ namespace NzbDrone.Core.Providers
                     episodeToUpdate.SeasonNumber = episode.SeasonNumber;
                     episodeToUpdate.Title = episode.EpisodeName;
 
-                    if (episode.Overview.Length > 3998)
-                        episodeToUpdate.Overview = episode.Overview.Substring(0, 3998);
-                    else
-                        episodeToUpdate.Overview = episode.Overview;
+                    episodeToUpdate.Overview = episode.Overview.Truncate(4000);
 
                     if (episode.FirstAired.Year > 1900)
                         episodeToUpdate.AirDate = episode.FirstAired.Date;

NzbDrone.sln

@@ -247,6 +247,7 @@ Global
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Debug|x64.ActiveCfg = Debug|Any CPU
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Debug|x86.Build.0 = Debug|Any CPU
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Release|Any CPU.Build.0 = Release|Any CPU
 		{C0EA1A40-91AD-4EEB-BD16-2DDDEBD20AE5}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU