Refactor

DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs

@@ -75,10 +75,16 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
             _settingsService.LastShouldDownloadMedia = ShouldDownloadMedia;
 
             // If single channel - prompt file path
-            if (IsSingleChannel)
+            if (Channels != null && IsSingleChannel)
             {
                 var channel = Channels.Single();
-                var defaultFileName = ExportRequest.GetDefaultOutputFileName(Guild!, channel, SelectedFormat, After, Before);
+                var defaultFileName = ExportRequest.GetDefaultOutputFileName(
+                    Guild!,
+                    channel,
+                    SelectedFormat,
+                    After,
+                    Before
+                );
 
                 // Filter
                 var ext = SelectedFormat.GetFileExtension();
@@ -92,11 +98,24 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
                 OutputPath = _dialogManager.PromptDirectoryPath();
             }
 
-            // If canceled - return
             if (string.IsNullOrWhiteSpace(OutputPath))
                 return;
 
             Close(true);
         }
     }
+
+    public static class ExportSetupViewModelExtensions
+    {
+        public static ExportSetupViewModel CreateExportSetupViewModel(this IViewModelFactory factory,
+            Guild guild, IReadOnlyList<Channel> channels)
+        {
+            var viewModel = factory.CreateExportSetupViewModel();
+
+            viewModel.Guild = guild;
+            viewModel.Channels = channels;
+
+            return viewModel;
+        }
+    }
 }

DiscordChatExporter.Gui/ViewModels/Framework/DialogManager.cs

@@ -19,13 +19,10 @@ namespace DiscordChatExporter.Gui.ViewModels.Framework
 
         public async ValueTask<T> ShowDialogAsync<T>(DialogScreen<T> dialogScreen)
         {
-            // Get the view that renders this viewmodel
             var view = _viewManager.CreateAndBindViewForModelIfNecessary(dialogScreen);
 
-            // Set up event routing that will close the view when called from viewmodel
             void OnDialogOpened(object? sender, DialogOpenedEventArgs openArgs)
             {
-                // Delegate to close the dialog and unregister event handler
                 void OnScreenClosed(object? o, EventArgs closeArgs)
                 {
                     openArgs.Session.Close();
@@ -35,37 +32,31 @@ namespace DiscordChatExporter.Gui.ViewModels.Framework
                 dialogScreen.Closed += OnScreenClosed;
             }
 
-            // Show view
             await DialogHost.Show(view, OnDialogOpened);
 
-            // Return the result
             return dialogScreen.DialogResult;
         }
 
         public string? PromptSaveFilePath(string filter = "All files|*.*", string defaultFilePath = "")
         {
-            // Create dialog
             var dialog = new SaveFileDialog
             {
                 Filter = filter,
                 AddExtension = true,
                 FileName = defaultFilePath,
-                DefaultExt = Path.GetExtension(defaultFilePath) ?? ""
+                DefaultExt = Path.GetExtension(defaultFilePath)
             };
 
-            // Show dialog and return result
             return dialog.ShowDialog() == true ? dialog.FileName : null;
         }
 
         public string? PromptDirectoryPath(string defaultDirPath = "")
         {
-            // Create dialog
             var dialog = new VistaFolderBrowserDialog
             {
                 SelectedPath = defaultDirPath
             };
 
-            // Show dialog and return result
             return dialog.ShowDialog() == true ? dialog.SelectedPath : null;
         }
     }

DiscordChatExporter.Gui/ViewModels/Framework/Extensions.cs

@@ -1,19 +0,0 @@
-using System.Collections.Generic;
-using DiscordChatExporter.Domain.Discord.Models;
-using DiscordChatExporter.Gui.ViewModels.Dialogs;
-
-namespace DiscordChatExporter.Gui.ViewModels.Framework
-{
-    public static class Extensions
-    {
-        public static ExportSetupViewModel CreateExportSetupViewModel(this IViewModelFactory factory,
-            Guild guild, IReadOnlyList<Channel> channels)
-        {
-            var viewModel = factory.CreateExportSetupViewModel();
-            viewModel.Guild = guild;
-            viewModel.Channels = channels;
-
-            return viewModel;
-        }
-    }
-}

DiscordChatExporter.Gui/ViewModels/RootViewModel.cs

@@ -8,7 +8,9 @@ using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exceptions;
 using DiscordChatExporter.Domain.Exporting;
 using DiscordChatExporter.Domain.Utilities;
+using DiscordChatExporter.Gui.Internal;
 using DiscordChatExporter.Gui.Services;
+using DiscordChatExporter.Gui.ViewModels.Dialogs;
 using DiscordChatExporter.Gui.ViewModels.Framework;
 using Gress;
 using MaterialDesignThemes.Wpf;
@@ -63,14 +65,21 @@ namespace DiscordChatExporter.Gui.ViewModels
 
             // Update busy state when progress manager changes
             ProgressManager.Bind(o => o.IsActive,
-                (sender, args) => IsBusy = ProgressManager.IsActive);
+                (sender, args) => IsBusy = ProgressManager.IsActive
+            );
+
             ProgressManager.Bind(o => o.IsActive,
-                (sender, args) => IsProgressIndeterminate = ProgressManager.IsActive && ProgressManager.Progress.IsEither(0, 1));
+                (sender, args) => IsProgressIndeterminate =
+                    ProgressManager.IsActive && ProgressManager.Progress.IsEither(0, 1)
+            );
+
             ProgressManager.Bind(o => o.Progress,
-                (sender, args) => IsProgressIndeterminate = ProgressManager.IsActive && ProgressManager.Progress.IsEither(0, 1));
+                (sender, args) => IsProgressIndeterminate =
+                    ProgressManager.IsActive && ProgressManager.Progress.IsEither(0, 1)
+            );
         }
 
-        private async ValueTask HandleAutoUpdateAsync()
+        private async ValueTask CheckForUpdatesAsync()
         {
             try
             {
@@ -117,7 +126,7 @@ namespace DiscordChatExporter.Gui.ViewModels
                 App.SetLightTheme();
             }
 
-            await HandleAutoUpdateAsync();
+            await CheckForUpdatesAsync();
         }
 
         protected override void OnClose()
@@ -134,6 +143,8 @@ namespace DiscordChatExporter.Gui.ViewModels
             await _dialogManager.ShowDialogAsync(dialog);
         }
 
+        public void ShowHelp() => ProcessEx.StartShellExecute(App.GitHubProjectWikiUrl);
+
         public bool CanPopulateGuildsAndChannels =>
             !IsBusy && !string.IsNullOrWhiteSpace(TokenValue);
 
@@ -187,8 +198,8 @@ namespace DiscordChatExporter.Gui.ViewModels
             var exporter = new ChannelExporter(token);
 
             var operations = ProgressManager.CreateOperations(dialog.Channels!.Count);
-
             var successfulExportCount = 0;
+
             await dialog.Channels.Zip(operations).ParallelForEachAsync(async tuple =>
             {
                 var (channel, operation) = tuple;