From be98862ce0c92e392394c6ac40a3caaf3811e537 Mon Sep 17 00:00:00 2001
From: Mark McDowall <mark@mcdowall.ca>
Date: Wed, 14 Dec 2022 00:24:02 -0800
Subject: [PATCH] Fixed: Size on disk calculation including multi-episode files
 multiple times

Closes #5296
---
 .../SeriesStatisticsFixture.cs                | 21 +++++++++++++++++++
 .../SeriesStats/SeriesStatisticsRepository.cs |  2 +-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/NzbDrone.Core.Test/SeriesStatsTests/SeriesStatisticsFixture.cs b/src/NzbDrone.Core.Test/SeriesStatsTests/SeriesStatisticsFixture.cs
index 980107237..254b4e987 100644
--- a/src/NzbDrone.Core.Test/SeriesStatsTests/SeriesStatisticsFixture.cs
+++ b/src/NzbDrone.Core.Test/SeriesStatsTests/SeriesStatisticsFixture.cs
@@ -4,6 +4,7 @@ using System.Linq;
 using FizzWare.NBuilder;
 using FluentAssertions;
 using NUnit.Framework;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Languages;
 using NzbDrone.Core.MediaFiles;
 using NzbDrone.Core.Qualities;
@@ -180,5 +181,25 @@ namespace NzbDrone.Core.Test.SeriesStatsTests
             stats.Should().HaveCount(1);
             stats.First().SizeOnDisk.Should().Be(_episodeFile.Size);
         }
+
+        [Test]
+        public void should_not_duplicate_size_for_multi_episode_files()
+        {
+            GivenEpisodeWithFile();
+            GivenEpisode();
+            GivenEpisodeFile();
+
+            var episode2 = _episode.JsonClone();
+
+            episode2.Id = 0;
+            episode2.EpisodeNumber += 1;
+
+            Db.Insert(episode2);
+
+            var stats = Subject.SeriesStatistics();
+
+            stats.Should().HaveCount(1);
+            stats.First().SizeOnDisk.Should().Be(_episodeFile.Size);
+        }
     }
 }
diff --git a/src/NzbDrone.Core/SeriesStats/SeriesStatisticsRepository.cs b/src/NzbDrone.Core/SeriesStats/SeriesStatisticsRepository.cs
index f267f369f..f2b5775df 100644
--- a/src/NzbDrone.Core/SeriesStats/SeriesStatisticsRepository.cs
+++ b/src/NzbDrone.Core/SeriesStats/SeriesStatisticsRepository.cs
@@ -55,7 +55,7 @@ namespace NzbDrone.Core.SeriesStats
             return new SqlBuilder()
             .Select(@"Episodes.SeriesId AS SeriesId,
                              Episodes.SeasonNumber,
-                             SUM(COALESCE(EpisodeFiles.Size, 0)) AS SizeOnDisk,
+                             SUM(COALESCE(EpisodeFiles.Size, 0)) * COUNT(DISTINCT EpisodeFiles.Id) / COUNT(EpisodeFiles.Id) AS SizeOnDisk,
                              GROUP_CONCAT(EpisodeFiles.ReleaseGroup, '|') AS ReleaseGroupsString,
                              COUNT(*) AS TotalEpisodeCount,
                              SUM(CASE WHEN AirdateUtc <= @currentDate OR EpisodeFileId > 0 THEN 1 ELSE 0 END) AS AvailableEpisodeCount,