UI - Improved exception dialog shown at early startup failure

Plugins - Provide a better error message on built in plugin installation failure
Conditions - Added better null/not null checks for strings

src/Artemis.Core/DefaultTypes/Conditions/Operators/StringNotNullConditionOperator.cs

@@ -0,0 +1,13 @@
+namespace Artemis.Core
+{
+    internal class StringNotNullConditionOperator : ConditionOperator<string>
+    {
+        public override string Description => "Is not null";
+        public override string Icon => "CheckboxMarkedCircleOutline";
+
+        public override bool Evaluate(string a)
+        {
+            return !string.IsNullOrWhiteSpace(a);
+        }
+    }
+}

src/Artemis.Core/DefaultTypes/Conditions/Operators/StringNullConditionOperator.cs

@@ -0,0 +1,13 @@
+namespace Artemis.Core
+{
+    internal class StringNullConditionOperator : ConditionOperator<string>
+    {
+        public override string Description => "Is null";
+        public override string Icon => "Null";
+
+        public override bool Evaluate(string a)
+        {
+            return string.IsNullOrWhiteSpace(a);
+        }
+    }
+}

src/Artemis.Core/Services/PluginManagementService.cs

@@ -98,11 +98,19 @@ namespace Artemis.Core.Services
                     }
                     else
                     {
+                        PluginInfo pluginInfo;
                         try
                         {
                             // Compare versions, copy if the same when debugging
-                            PluginInfo pluginInfo = CoreJson.DeserializeObject<PluginInfo>(File.ReadAllText(metadataFile))!;
+                            pluginInfo = CoreJson.DeserializeObject<PluginInfo>(File.ReadAllText(metadataFile))!;
+                        }
+                        catch (Exception e)
+                        {
+                            throw new ArtemisPluginException($"Failed read plugin metadata needed to install built-in plugin: {e.Message}", e);
+                        }
 
+                        try
+                        {
                             if (builtInPluginInfo.Version > pluginInfo.Version)
                             {
                                 _logger.Debug("Copying updated built-in plugin from {pluginInfo} to {builtInPluginInfo}", pluginInfo, builtInPluginInfo);
@@ -111,7 +119,7 @@ namespace Artemis.Core.Services
                         }
                         catch (Exception e)
                         {
-                            throw new ArtemisPluginException("Failed read plugin metadata needed to install built-in plugin", e);
+                            throw new ArtemisPluginException($"Failed to install built-in plugin: {e.Message}", e);
                         }
                     }
                 }

src/Artemis.Core/Services/Registration/ConditionOperatorService.cs

@@ -61,6 +61,8 @@ namespace Artemis.Core.Services
             RegisterConditionOperator(Constants.CorePlugin, new StringStartsWithConditionOperator());
             RegisterConditionOperator(Constants.CorePlugin, new StringEndsWithConditionOperator());
             RegisterConditionOperator(Constants.CorePlugin, new StringMatchesRegexConditionOperator());
+            RegisterConditionOperator(Constants.CorePlugin, new StringNullConditionOperator());
+            RegisterConditionOperator(Constants.CorePlugin, new StringNotNullConditionOperator());
 
             // Null checks, at the bottom
             // TODO: Implement a priority mechanism

src/Artemis.UI/ApplicationStateManager.cs

@@ -4,13 +4,16 @@ using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Net.Http;
+using System.Reflection;
 using System.Security.Principal;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
 using Artemis.Core;
+using Artemis.UI.Screens;
 using Artemis.UI.Utilities;
 using Ninject;
+using Ookii.Dialogs.Wpf;
 using Stylet;
 
 namespace Artemis.UI
@@ -127,5 +130,48 @@ namespace Artemis.UI
 
             Execute.OnUIThread(() => Application.Current.Shutdown());
         }
+
+        public void DisplayException(Exception e)
+        {
+            using TaskDialog dialog = new();
+            AssemblyInformationalVersionAttribute versionAttribute = typeof(ApplicationStateManager).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>();
+            dialog.WindowTitle = $"Artemis {versionAttribute?.InformationalVersion} build {Constants.BuildInfo.BuildNumberDisplay}";
+            dialog.MainInstruction = "Unfortunately Artemis ran into an unhandled exception and cannot continue.";
+            dialog.Content = e.Message;
+            dialog.ExpandedInformation = e.StackTrace.Trim();
+
+            dialog.CollapsedControlText = "Show stack trace";
+            dialog.ExpandedControlText = "Hide stack trace";
+
+            dialog.Footer = "If this keeps happening check out the <a href=\"https://wiki.artemis-rgb.com\">wiki</a> or hit us up on <a href=\"https://discord.gg/S3MVaC9\">Discord</a>.";
+            dialog.FooterIcon = TaskDialogIcon.Error;
+            dialog.EnableHyperlinks = true;
+            dialog.HyperlinkClicked += OpenHyperlink;
+
+            TaskDialogButton copyButton = new("Copy stack trace");
+            TaskDialogButton closeButton = new("Close") {Default = true};
+            dialog.Buttons.Add(copyButton);
+            dialog.Buttons.Add(closeButton);
+            dialog.ButtonClicked += (_, args) =>
+            {
+                if (args.Item == copyButton)
+                {
+                    Clipboard.SetText(e.ToString());
+                    args.Cancel = true;
+                }
+            };
+
+            dialog.ShowDialog(Application.Current.MainWindow);
+        }
+
+        private void OpenHyperlink(object sender, HyperlinkClickedEventArgs e)
+        {
+            ProcessStartInfo processInfo = new()
+            {
+                FileName = e.Href,
+                UseShellExecute = true
+            };
+            Process.Start(processInfo);
+        }
     }
 }

src/Artemis.UI/Bootstrapper.cs

@@ -48,7 +48,14 @@ namespace Artemis.UI
                 return;
             }
 
-            try { DPIAwareness.Initalize(); } catch (Exception ex) { logger.Error($"Failed to set DPI-Awareness: {ex.Message}"); }
+            try
+            {
+                DPIAwareness.Initalize();
+            }
+            catch (Exception ex)
+            {
+                logger.Error($"Failed to set DPI-Awareness: {ex.Message}");
+            }
 
             IViewManager viewManager = Kernel.Get<IViewManager>();
             StartupArguments = Args.ToList();
@@ -136,15 +143,9 @@ namespace Artemis.UI
         private void HandleFatalException(Exception e, ILogger logger)
         {
             logger.Fatal(e, "Fatal exception during initialization, shutting down.");
-
-            // Can't use a pretty exception dialog here since the UI might not even be visible
             Execute.OnUIThread(() =>
             {
-                Kernel.Get<IWindowManager>().ShowMessageBox(e.Message + "\n\n Please refer the log file for more details.",
+                _applicationStateManager.DisplayException(e);
-                    "Fatal exception during initialization",
-                    MessageBoxButton.OK,
-                    MessageBoxImage.Error
-                );
                 Environment.Exit(1);
             });
         }