From 1fe2023b51ce75de8fae9a7c8a7bcd4e776d78cb Mon Sep 17 00:00:00 2001
From: Anton Kasyanov <antonk@remobjects.com>
Date: Sat, 17 Jun 2017 13:29:09 +0300
Subject: [PATCH] Exception information logging

---
 .../ApplicationBase/ExceptionHandler.cs       | 50 +++++++++++++++++++
 Eve-O-Preview/Eve-O-Preview.csproj            |  1 +
 Eve-O-Preview/Program.cs                      |  6 +--
 3 files changed, 54 insertions(+), 3 deletions(-)
 create mode 100644 Eve-O-Preview/ApplicationBase/ExceptionHandler.cs

diff --git a/Eve-O-Preview/ApplicationBase/ExceptionHandler.cs b/Eve-O-Preview/ApplicationBase/ExceptionHandler.cs
new file mode 100644
index 0000000..6489202
--- /dev/null
+++ b/Eve-O-Preview/ApplicationBase/ExceptionHandler.cs
@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Windows.Forms;
+
+namespace EveOPreview
+{
+	// A really very primitive exception handler stuff here
+	// No IoC, no fancy DI containers - just a plain exception stacktrace dump
+	// If this code is called then something was gone really bad
+	// so even the DI infrastructure might be dead already.
+	// So this dumb and non elegant approach is used
+	sealed class ExceptionHandler
+	{
+		private const string ExceptionDumpFileName = "EVE-O Preview.log";
+		private const string ExceptionMessage = "EVE-O Preview has encountered a problem and needs to close. Additional information has been saved in the crash log file.";
+
+		public void SetupExceptionHandlers()
+		{
+			Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
+			Application.ThreadException += delegate (Object sender, ThreadExceptionEventArgs e)
+			{
+				this.ExceptionEventHandler(e.Exception);
+			};
+
+			AppDomain.CurrentDomain.UnhandledException += delegate (Object sender, UnhandledExceptionEventArgs e)
+			{
+				this.ExceptionEventHandler(e.ExceptionObject as Exception);
+			};
+		}
+
+		private void ExceptionEventHandler(Exception exception)
+		{
+			try
+			{
+				String exceptionMessage = exception.ToString();
+				File.WriteAllText(ExceptionHandler.ExceptionDumpFileName, exceptionMessage);
+
+				MessageBox.Show(ExceptionHandler.ExceptionMessage, @"EVE-O Preview", MessageBoxButtons.OK, MessageBoxIcon.Error);
+			}
+			catch
+			{
+				// We are in unstable state now so even this operation might fail
+				// Still we actually don't care anymore - anyway the application has been cashed
+			}
+
+			System.Environment.Exit(1);
+		}
+	}
+}
\ No newline at end of file
diff --git a/Eve-O-Preview/Eve-O-Preview.csproj b/Eve-O-Preview/Eve-O-Preview.csproj
index 72b015f..b27ec26 100644
--- a/Eve-O-Preview/Eve-O-Preview.csproj
+++ b/Eve-O-Preview/Eve-O-Preview.csproj
@@ -88,6 +88,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ApplicationBase\ApplicationController.cs" />
+    <Compile Include="ApplicationBase\ExceptionHandler.cs" />
     <Compile Include="ApplicationBase\IApplicationController.cs" />
     <Compile Include="ApplicationBase\IIocContainer.cs" />
     <Compile Include="ApplicationBase\IPresenterGeneric.cs" />
diff --git a/Eve-O-Preview/Program.cs b/Eve-O-Preview/Program.cs
index c25e9c4..494c8de 100644
--- a/Eve-O-Preview/Program.cs
+++ b/Eve-O-Preview/Program.cs
@@ -27,15 +27,15 @@ namespace EveOPreview
 				return;
 			}
 
+			ExceptionHandler handler = new ExceptionHandler();
+			handler.SetupExceptionHandlers();
+
 			Program.InitializeWinFormsGui();
 
 			IApplicationController controller = Program.InitializeApplicationController();
-
 			Program.SetupApplicationConttroller(controller, Program.GetCustomConfigFile(args));
 
 			controller.Run<MainPresenter>();
-
-			token = null;
 		}
 
 		private static string GetCustomConfigFile(string[] args)