Fixed: Don't include year 0 in series folder name

Fixes #3057

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderTests/CleanTitleYearFixture.cs

@@ -58,5 +58,16 @@ namespace NzbDrone.Core.Test.OrganizerTests.FileNameBuilderTests
             Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
                    .Should().Be(expected);
         }
+
+        [Test]
+        public void should_not_include_0_for_year()
+        {
+            _series.Title = "The Alienist";
+            _series.Year = 0;
+            _namingConfig.StandardEpisodeFormat = "{Series CleanTitleYear}";
+
+            Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
+                   .Should().Be("The Alienist");
+        }
     }
 }

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderTests/TitleTheYearFixture.cs

@@ -59,5 +59,16 @@ namespace NzbDrone.Core.Test.OrganizerTests.FileNameBuilderTests
             Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
                    .Should().Be(expected);
         }
+
+        [Test]
+        public void should_not_include_0_for_year()
+        {
+            _series.Title = "The Alienist";
+            _series.Year = 0;
+            _namingConfig.StandardEpisodeFormat = "{Series TitleTheYear}";
+
+            Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
+                   .Should().Be("Alienist, The");
+        }
     }
 }

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderTests/TitleYearFixture.cs

@@ -58,5 +58,16 @@ namespace NzbDrone.Core.Test.OrganizerTests.FileNameBuilderTests
             Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
                    .Should().Be(expected);
         }
+
+        [Test]
+        public void should_not_include_0_for_year()
+        {
+            _series.Title = "The Alienist";
+            _series.Year = 0;
+            _namingConfig.StandardEpisodeFormat = "{Series TitleYear}";
+
+            Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
+                   .Should().Be("The Alienist");
+        }
     }
 }

src/NzbDrone.Core/Organizer/FileNameBuilder.cs

@@ -286,6 +286,12 @@ namespace NzbDrone.Core.Organizer
 
         public static string TitleYear(string title, int year)
         {
+            // Don't use 0 for the year.
+            if (year == 0)
+            {
+                return title;
+            }
+
             // Regex match incase the year in the title doesn't match the year, for whatever reason.
             if (YearRegex.IsMatch(title))
             {