From 2cb84c00ef850148b517513e059436907b8269c6 Mon Sep 17 00:00:00 2001
From: Anthony Truskinger <anthony.truskinger@gmail.com>
Date: Fri, 8 Dec 2017 16:19:25 +1000
Subject: [PATCH] Had to downcast events specifically The CSV parser is being
 really annoying and not automatically downcasting base type arrays. This
 "fix" is unfortunately quite ugly and will likely need to be applied to many
 other `WriteToCsv` calls in the future. :angry: Original hash:
 92be685e3d59f3aa903288bcd4abba5a200553ef

---
 Acoustics/Acoustics.Test/Shared/CsvTests.cs | 22 +++++++++++++++++++++
 AudioAnalysis/AnalysisPrograms/KoalaMale.cs |  6 ++++--
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Acoustics/Acoustics.Test/Shared/CsvTests.cs b/Acoustics/Acoustics.Test/Shared/CsvTests.cs
index 1765014b9..9510fbaa0 100644
--- a/Acoustics/Acoustics.Test/Shared/CsvTests.cs
+++ b/Acoustics/Acoustics.Test/Shared/CsvTests.cs
@@ -386,6 +386,28 @@ public void TestBaseTypesAreSerializedAsEnumerable()
             Assert.AreEqual(childText, baseText);
         }
 
+        /// <summary>
+        /// For some inane reason CsvHelper does not downcast to derived types!
+        /// </summary>
+        [TestMethod]
+        public void TestBaseTypesAreSerializedAsEnumerableAcousticEvent()
+        {
+            var exampleEvent = new AcousticEvent(100.Seconds(), 15, 4, 100, 3000);
+            var exampleEvent2 = new AcousticEvent(100.Seconds(), 15, 4, 100, 3000);
+            AcousticEvent[] childArray = { exampleEvent, exampleEvent2 };
+            EventBase[] baseArray = { exampleEvent, exampleEvent2 };
+
+            Csv.WriteToCsv(this.testFile, childArray);
+
+            var childText = File.ReadAllText(this.testFile.FullName);
+
+            Csv.WriteToCsv(this.testFile, baseArray);
+
+            var baseText = File.ReadAllText(this.testFile.FullName);
+
+            Assert.AreNotEqual(childText, baseText);
+        }
+
         [TestMethod]
         public void TestInvariantCultureIsUsed()
         {
diff --git a/AudioAnalysis/AnalysisPrograms/KoalaMale.cs b/AudioAnalysis/AnalysisPrograms/KoalaMale.cs
index 6766aff50..654f9e8d2 100644
--- a/AudioAnalysis/AnalysisPrograms/KoalaMale.cs
+++ b/AudioAnalysis/AnalysisPrograms/KoalaMale.cs
@@ -12,6 +12,7 @@ namespace AnalysisPrograms
     using System.Drawing;
     using System.Drawing.Imaging;
     using System.IO;
+    using System.Linq;
     using Acoustics.Shared;
     using Acoustics.Shared.Contracts;
     using Acoustics.Shared.Csv;
@@ -288,7 +289,8 @@ public static KoalaMaleResults Analysis(AudioRecording recording, IDictionary<st
                 maxDuration,
                 out scores,
                 out events,
-                out hits);
+                out hits,
+                segmentStartOffset);
 
             // remove isolated koala events - this is to remove false positive identifications
             events = FilterMaleKoalaEvents(events);
@@ -506,7 +508,7 @@ public override void SummariseResults(
 
         public override void WriteEventsFile(FileInfo destination, IEnumerable<EventBase> results)
         {
-            Csv.WriteToCsv(destination, results);
+            Csv.WriteToCsv(destination, results.Cast<AcousticEvent>());
         }
 
         public override List<FileInfo> WriteSpectrumIndicesFiles(DirectoryInfo destination, string fileNameBase, IEnumerable<SpectralIndexBase> results)