null checks

AaxDecrypter/UNTESTED/AaxToM4bConverter.cs

@@ -293,14 +293,14 @@ namespace AaxDecrypter
 
         public bool Step3_Chapterize()
         {
-            string str1 = "";
+            var str1 = "";
             if (chapters.FirstChapterStart != 0.0)
             {
                 str1 = " -ss " + chapters.FirstChapterStart.ToString("0.000", CultureInfo.InvariantCulture) + " -t " + (chapters.LastChapterStart - 1.0).ToString("0.000", CultureInfo.InvariantCulture) + " ";
             }
 
-            string ffmpegTags = tags.GenerateFfmpegTags();
+            var ffmpegTags = tags.GenerateFfmpegTags();
-            string ffmpegChapters = chapters.GenerateFfmpegChapters();
+            var ffmpegChapters = chapters.GenerateFfmpegChapters();
             File.WriteAllText(ff_txt_file, ffmpegTags + ffmpegChapters);
 
             var tagAndChapterInfo = new ProcessStartInfo

AaxDecrypter/UNTESTED/Chapters.cs

@@ -17,10 +17,10 @@ namespace AaxDecrypter
 
         public Chapters(string file, double totalTime)
         {
-            this.markers = getAAXChapters(file);
+            markers = getAAXChapters(file);
 
             // add end time
-            this.markers.Add(totalTime);
+            markers.Add(totalTime);
         }
 
         private static List<double> getAAXChapters(string file)
@@ -42,7 +42,7 @@ namespace AaxDecrypter
         }
 
         // subtract 1 b/c end time marker is a real entry but isn't a real chapter
-        public int Count() => this.markers.Count - 1;
+        public int Count() => markers.Count - 1;
 
         public string GetCuefromChapters(string fileName)
         {
@@ -56,7 +56,7 @@ namespace AaxDecrypter
             {
                 var chapter = i + 1;
 
-                var timeSpan = TimeSpan.FromSeconds(this.markers[i]);
+                var timeSpan = TimeSpan.FromSeconds(markers[i]);
                 var minutes = Math.Floor(timeSpan.TotalMinutes).ToString();
                 var seconds = timeSpan.Seconds.ToString("D2");
                 var milliseconds = (timeSpan.Milliseconds / 10).ToString("D2");
@@ -78,8 +78,8 @@ namespace AaxDecrypter
             {
                 var chapter = i + 1;
 
-                var start = this.markers[i] * 1000.0;
+                var start = markers[i] * 1000.0;
-                var end = this.markers[i + 1] * 1000.0;
+                var end = markers[i + 1] * 1000.0;
                 var chapterName = chapter.ToString("D3");
 
                 stringBuilder.Append("[CHAPTER]\n");

AaxDecrypter/UNTESTED/Tags.cs

@@ -1,9 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Globalization;
-using System.IO;
-using System.Text;
 using TagLib;
 using TagLib.Mpeg4;
 using Dinah.Core;
@@ -23,52 +18,50 @@ namespace AaxDecrypter
         public string genre { get; }
         public TimeSpan duration { get; }
 
+        // input file
         public Tags(string file)
         {
-			using TagLib.File tagLibFile = TagLib.File.Create(file, "audio/mp4", ReadStyle.Average);
+            using var tagLibFile = TagLib.File.Create(file, "audio/mp4", ReadStyle.Average);
-			this.title = tagLibFile.Tag.Title.Replace(" (Unabridged)", "");
+			title = tagLibFile.Tag.Title.Replace(" (Unabridged)", "");
-			this.album = tagLibFile.Tag.Album.Replace(" (Unabridged)", "");
+			album = tagLibFile.Tag.Album.Replace(" (Unabridged)", "");
-			this.author = tagLibFile.Tag.FirstPerformer ?? "[unknown]";
+			author = tagLibFile.Tag.FirstPerformer ?? "[unknown]";
-			this.year = tagLibFile.Tag.Year.ToString();
+			year = tagLibFile.Tag.Year.ToString();
-			this.comments = tagLibFile.Tag.Comment;
+			comments = tagLibFile.Tag.Comment ?? "";
-			this.duration = tagLibFile.Properties.Duration;
+			duration = tagLibFile.Properties.Duration;
-			this.genre = tagLibFile.Tag.FirstGenre;
+			genre = tagLibFile.Tag.FirstGenre ?? "";
 
             var tag = tagLibFile.GetTag(TagTypes.Apple, true);
-			this.publisher = tag.Publisher;
+			publisher = tag.Publisher ?? "";
-			this.narrator = string.IsNullOrWhiteSpace(tagLibFile.Tag.FirstComposer) ? tag.Narrator : tagLibFile.Tag.FirstComposer;
+			narrator = string.IsNullOrWhiteSpace(tagLibFile.Tag.FirstComposer) ? tag.Narrator : tagLibFile.Tag.FirstComposer;
-			this.comments = !string.IsNullOrWhiteSpace(tag.LongDescription) ? tag.LongDescription : tag.Description;
+			comments = !string.IsNullOrWhiteSpace(tag.LongDescription) ? tag.LongDescription : tag.Description;
-			this.id = tag.AudibleCDEK;
+			id = tag.AudibleCDEK;
 		}
 
+        // my best guess of what this step is doing:
+        // re-publish the data we read from the input file => output file
         public void AddAppleTags(string file)
         {
-			using var file1 = TagLib.File.Create(file, "audio/mp4", ReadStyle.Average);
+            using var tagLibFile = TagLib.File.Create(file, "audio/mp4", ReadStyle.Average);
-			var tag = (AppleTag)file1.GetTag(TagTypes.Apple, true);
+            var tag = (AppleTag)tagLibFile.GetTag(TagTypes.Apple, true);
-			tag.Publisher = this.publisher;
+			tag.Publisher = publisher;
-			tag.LongDescription = this.comments;
+			tag.LongDescription = comments;
-			tag.Description = this.comments;
+			tag.Description = comments;
-			file1.Save();
+            tagLibFile.Save();
 		}
 
         public string GenerateFfmpegTags()
-        {
+            => $";FFMETADATA1"
-            StringBuilder stringBuilder = new StringBuilder();
+            + $"\nmajor_brand=aax"
-
+            + $"\nminor_version=1"
-            stringBuilder.Append(";FFMETADATA1\n");
+            + $"\ncompatible_brands=aax M4B mp42isom"
-            stringBuilder.Append("major_brand=aax\n");
+            + $"\ndate={year}"
-            stringBuilder.Append("minor_version=1\n");
+            + $"\ngenre={genre}"
-            stringBuilder.Append("compatible_brands=aax M4B mp42isom\n");
+            + $"\ntitle={title}"
-            stringBuilder.Append("date=" + this.year + "\n");
+            + $"\nartist={author}"
-            stringBuilder.Append("genre=" + this.genre + "\n");
+            + $"\nalbum={album}"
-            stringBuilder.Append("title=" + this.title + "\n");
+            + $"\ncomposer={narrator}"
-            stringBuilder.Append("artist=" + this.author + "\n");
+            + $"\ncomment={comments.Truncate(254)}"
-            stringBuilder.Append("album=" + this.album + "\n");
+            + $"\ndescription={comments}"
-            stringBuilder.Append("composer=" + this.narrator + "\n");
+            + $"\n";
-            stringBuilder.Append("comment=" + this.comments.Truncate(254) + "\n");
-            stringBuilder.Append("description=" + this.comments + "\n");
-
-            return stringBuilder.ToString();
-        }
     }
 }

LibationLauncher/LibationLauncher.csproj

@@ -13,7 +13,7 @@
     <!-- <PublishSingleFile>true</PublishSingleFile> -->
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
 
-    <Version>3.1.1.0</Version>
+    <Version>3.1.2.0</Version>
   </PropertyGroup>
 
   <ItemGroup>

REFERENCE.txt

@@ -1,6 +1,7 @@
 -- begin VERSIONING ---------------------------------------------------------------------------------------------------------------------
 https://github.com/rmcrackan/Libation/releases
 
+v3.1.2 : null checks
 v3.1.1 : Check if upgrade available on github
 v3.1.0 : FIRST PUBLIC RELEASE
 v3.1-beta.11 : Improved configuration and settings file management. Configurable logging