Added the possibility to attach files to the chat (#585)

Co-authored-by: Thorsten Sommer

app/MindWork AI Studio/Components/ChatComponent.razor.cs

@@ -3,6 +3,7 @@ using AIStudio.Dialogs;
 using AIStudio.Provider;
 using AIStudio.Settings;
 using AIStudio.Settings.DataModel;
+using AIStudio.Tools.Services;
 
 using Microsoft.AspNetCore.Components;
 using Microsoft.AspNetCore.Components.Web;
@@ -33,9 +34,12 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
     
     [Inject]
     private ILogger<ChatComponent> Logger { get; set; } = null!;
-    
+
     [Inject]
     private IDialogService DialogService { get; init; } = null!;
+
+    [Inject]
+    private PandocAvailabilityService PandocAvailabilityService { get; init; } = null!;
     
     private const Placement TOOLBAR_TOOLTIP_PLACEMENT = Placement.Top;
     private static readonly Dictionary<string, object?> USER_INPUT_ATTRIBUTES = new();
@@ -57,6 +61,8 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
     private string currentWorkspaceName = string.Empty;
     private Guid currentWorkspaceId = Guid.Empty;
     private CancellationTokenSource? cancellationTokenSource;
+    private HashSet<string> chatDocumentPaths = [];
+    private bool isPandocAvailable;
 
     // Unfortunately, we need the input field reference to blur the focus away. Without
     // this, we cannot clear the input field.
@@ -197,6 +203,10 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
         
         // Select the correct provider:
         await this.SelectProviderWhenLoadingChat();
+
+        // Check if Pandoc is available (no dialog or messages):
+        this.isPandocAvailable = await this.PandocAvailabilityService.IsAvailableAsync();
+
         await base.OnInitializedAsync();
     }
 
@@ -462,6 +472,7 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
             lastUserPrompt = new ContentText
             {
                 Text = this.userInput,
+                FileAttachments = this.chatDocumentPaths.ToList(),
             };
 
             //
@@ -507,6 +518,7 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
         // Clear the input field:
         await this.inputField.FocusAsync();
         this.userInput = string.Empty;
+        this.chatDocumentPaths.Clear();
         await this.inputField.BlurAsync();
         
         // Enable the stream state for the chat component: