Improved Pandoc installation checking (#571)

app/MindWork AI Studio/Tools/Pandoc.cs

@@ -37,8 +37,9 @@ public static partial class Pandoc
     /// </summary>
     /// <param name="rustService">Global rust service to access file system and data dir.</param>
     /// <param name="showMessages">Controls if snackbars are shown to the user.</param>
+    /// <param name="showSuccessMessage">Controls if a success snackbar is shown to the user.</param>
     /// <returns>True, if pandoc is available and the minimum required version is met, else false.</returns>
-    public static async Task<PandocInstallation> CheckAvailabilityAsync(RustService rustService, bool showMessages = true)
+    public static async Task<PandocInstallation> CheckAvailabilityAsync(RustService rustService, bool showMessages = true, bool showSuccessMessage = true)
     {
         try
         {
@@ -80,7 +81,7 @@ public static partial class Pandoc
             
             if (installedVersion >= MINIMUM_REQUIRED_VERSION)
             {
-                if (showMessages)
+                if (showMessages && showSuccessMessage)
                     await MessageBus.INSTANCE.SendSuccess(new(Icons.Material.Filled.CheckCircle, string.Format(TB("Pandoc v{0} is installed."), installedVersionString)));
                 
                 LOG.LogInformation("Pandoc v{0} is installed and matches the required version (v{1})", installedVersionString, MINIMUM_REQUIRED_VERSION.ToString());

app/MindWork AI Studio/Tools/PandocExport.cs

@@ -1,8 +1,11 @@
 using System.Diagnostics;
 using AIStudio.Chat;
+using AIStudio.Dialogs;
 using AIStudio.Tools.PluginSystem;
 using AIStudio.Tools.Services;
 
+using DialogOptions = AIStudio.Dialogs.DialogOptions;
+
 namespace AIStudio.Tools;
 
 public static class PandocExport
@@ -11,7 +14,7 @@ public static class PandocExport
     
     private static string TB(string fallbackEn) => I18N.I.T(fallbackEn, typeof(PandocExport).Namespace, nameof(PandocExport));
     
-    public static async Task<bool> ToMicrosoftWord(RustService rustService, string dialogTitle, IContent markdownContent)
+    public static async Task<bool> ToMicrosoftWord(RustService rustService, IDialogService dialogService, string dialogTitle, IContent markdownContent)
     {
         var response = await rustService.SaveFile(dialogTitle, new("Microsoft Word", ["docx"]));
         if (response.UserCancelled)
@@ -40,9 +43,25 @@ public static class PandocExport
             await File.WriteAllTextAsync(tempMarkdownFilePath, markdownText);
 
             // Ensure that Pandoc is installed and ready:
-            var pandocState = await Pandoc.CheckAvailabilityAsync(rustService);
+            var pandocState = await Pandoc.CheckAvailabilityAsync(rustService, showSuccessMessage: false);
             if (!pandocState.IsAvailable)
-                return false;
+            {
+                var dialogParameters = new DialogParameters<PandocDialog>
+                {
+                    { x => x.ShowInitialResultInSnackbar, false },
+                };
+                
+                var dialogReference = await dialogService.ShowAsync<PandocDialog>(TB("Pandoc Installation"), dialogParameters, DialogOptions.FULLSCREEN);
+                await dialogReference.Result;
+                
+                pandocState = await Pandoc.CheckAvailabilityAsync(rustService, showSuccessMessage: true);
+                if (!pandocState.IsAvailable)
+                {
+                    LOGGER.LogError("Pandoc is not available after installation attempt.");
+                    await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.Cancel, TB("Pandoc is required for Microsoft Word export.")));
+                    return false;
+                }
+            }
 
             // Call Pandoc to create the Word file:
             var pandoc = await PandocProcessBuilder