Added file type filtering to file selection dialogs (#442)

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

@@ -1,3 +1,4 @@
+using AIStudio.Tools.Rust;
 using AIStudio.Tools.Services;
 
 using Microsoft.AspNetCore.Components;
@@ -17,12 +18,9 @@ public partial class ReadPDFContent : MSGComponentBase
     
     private async Task SelectFile()
     {
-        var pdfFile = await this.RustService.SelectFile(T("Select PDF file"));
+        var pdfFile = await this.RustService.SelectFile(T("Select PDF file"), FileTypeFilter.PDF);
         if (pdfFile.UserCancelled)
             return;
-
-        if (!pdfFile.SelectedFilePath.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase))
-            return;
         
         if(!File.Exists(pdfFile.SelectedFilePath))
             return;

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

@@ -1,4 +1,5 @@
 using AIStudio.Settings;
+using AIStudio.Tools.Rust;
 using AIStudio.Tools.Services;
 
 using Microsoft.AspNetCore.Components;
@@ -22,6 +23,9 @@ public partial class SelectFile : ComponentBase
     [Parameter]
     public string FileDialogTitle { get; set; } = "Select File";
     
+    [Parameter]
+    public FileTypeFilter? Filter { get; set; }
+    
     [Parameter]
     public Func<string, string?> Validation { get; set; } = _ => null;
     
@@ -55,7 +59,7 @@ public partial class SelectFile : ComponentBase
 
     private async Task OpenFileDialog()
     {
-        var response = await this.RustService.SelectFile(this.FileDialogTitle, string.IsNullOrWhiteSpace(this.File) ? null : this.File);
+        var response = await this.RustService.SelectFile(this.FileDialogTitle, this.Filter, string.IsNullOrWhiteSpace(this.File) ? null : this.File);
         this.Logger.LogInformation($"The user selected the file '{response.SelectedFilePath}'.");
 
         if (!response.UserCancelled)

app/MindWork AI Studio/Tools/Rust/FileTypeFilter.cs

@@ -0,0 +1,18 @@
+// ReSharper disable NotAccessedPositionalProperty.Global
+namespace AIStudio.Tools.Rust;
+
+/// <summary>
+/// Represents a file type filter for file selection dialogs.
+/// </summary>
+/// <param name="FilterName">The name of the filter.</param>
+/// <param name="FilterExtensions">The file extensions associated with the filter.</param>
+public readonly record struct FileTypeFilter(string FilterName, string[] FilterExtensions)
+{
+    public static FileTypeFilter PDF => new("PDF Files", ["pdf"]);
+    
+    public static FileTypeFilter Text => new("Text Files", ["txt", "md"]);
+    
+    public static FileTypeFilter AllOffice => new("All Office Files", ["docx", "xlsx", "pptx", "doc", "xls", "ppt", "pdf"]);
+    
+    public static FileTypeFilter AllImages => new("All Image Files", ["jpg", "jpeg", "png", "gif", "bmp", "tiff"]);
+}

app/MindWork AI Studio/Tools/Rust/SelectFileOptions.cs

@@ -0,0 +1,10 @@
+namespace AIStudio.Tools.Rust;
+
+public sealed class SelectFileOptions
+{
+    public required string Title { get; init; }
+    
+    public PreviousFile? PreviousFile { get; init; }
+
+    public FileTypeFilter? Filter { get; init; }
+}

app/MindWork AI Studio/Tools/Services/RustService.FileSystem.cs

@@ -17,10 +17,16 @@ public sealed partial class RustService
         return await result.Content.ReadFromJsonAsync<DirectorySelectionResponse>(this.jsonRustSerializerOptions);
     }
     
-    public async Task<FileSelectionResponse> SelectFile(string title, string? initialFile = null)
+    public async Task<FileSelectionResponse> SelectFile(string title, FileTypeFilter? filter = null, string? initialFile = null)
     {
-        PreviousFile? previousFile = initialFile is null ? null : new (initialFile);
-        var result = await this.http.PostAsJsonAsync($"/select/file?title={title}", previousFile, this.jsonRustSerializerOptions);
+        var payload = new SelectFileOptions
+        {
+            Title = title,
+            PreviousFile = initialFile is null ? null : new (initialFile),
+            Filter = filter
+        };
+        
+        var result = await this.http.PostAsJsonAsync("/select/file", payload, this.jsonRustSerializerOptions);
         if (!result.IsSuccessStatusCode)
         {
             this.logger!.LogError($"Failed to select a file: '{result.StatusCode}'");