From 5043060ee2d7cb143238c354d9aa5f72f44164c1 Mon Sep 17 00:00:00 2001
From: Xjph <archseraphim@gmail.com>
Date: Tue, 22 Feb 2022 13:30:01 -0330
Subject: [PATCH] Add top level error logging. (#55)

* Add top level error logging.

* Remove test exception, chain stringbuilders.
---
 ObservatoryCore/ObservatoryCore.cs | 37 ++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/ObservatoryCore/ObservatoryCore.cs b/ObservatoryCore/ObservatoryCore.cs
index 2eb65ec..d7ba356 100644
--- a/ObservatoryCore/ObservatoryCore.cs
+++ b/ObservatoryCore/ObservatoryCore.cs
@@ -10,13 +10,40 @@ namespace Observatory
         static void Main(string[] args)
         {
             string version = System.Reflection.Assembly.GetEntryAssembly().GetName().Version.ToString();
-            if (Properties.Core.Default.CoreVersion != version)
+            try
             {
-                Properties.Core.Default.Upgrade();
-                Properties.Core.Default.CoreVersion = version;
-                Properties.Core.Default.Save();
+                if (Properties.Core.Default.CoreVersion != version)
+                {
+                    Properties.Core.Default.Upgrade();
+                    Properties.Core.Default.CoreVersion = version;
+                    Properties.Core.Default.Save();
+                }
+                BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
             }
-            BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+            catch (Exception ex)
+            {
+                var docPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
+                var errorMessage = new System.Text.StringBuilder();
+                errorMessage
+                    .AppendLine($"Error encountered in Elite Observatory {version}.")
+                    .AppendLine(FormatExceptionMessage(ex))
+                    .AppendLine();
+                System.IO.File.AppendAllText(docPath + System.IO.Path.DirectorySeparatorChar + "ObservatoryErrorLog.txt", errorMessage.ToString());
+            }
+
+        }
+
+        static string FormatExceptionMessage(Exception ex, bool inner = false)
+        {
+            var errorMessage = new System.Text.StringBuilder();
+            errorMessage
+                .AppendLine($"{(inner ? "Inner e" : "E")}xception message: {ex.Message}")
+                .AppendLine($"Stack trace:")
+                .AppendLine(ex.StackTrace);
+            if (ex.InnerException != null)
+                errorMessage.AppendLine(FormatExceptionMessage(ex.InnerException, true));
+            
+            return errorMessage.ToString();
         }
 
         public static AppBuilder BuildAvaloniaApp()