Added progress messages and quick access to exported files (#1112)

app/MindWork AI Studio/Tools/DataFileExportSuccessMessage.cs

@@ -0,0 +1,44 @@
+using AIStudio.Components;
+
+namespace AIStudio.Tools;
+
+/// <summary>
+/// The notification that a file was exported, with the ways to reach it.
+/// </summary>
+/// <remarks>
+/// By default, it stays until the user closes it, also after they took one of its ways: whoever exports
+/// a file wants to get to it, often in both ways, and that may well happen later than a timeout would
+/// allow. Users who prefer it otherwise let it close like other messages, see
+/// DataApp.CloseExportMessagesAutomatically.
+/// </remarks>
+/// <param name="Key">The key of the export. The notification that the export runs has the same one and gets replaced.</param>
+/// <param name="Icon">The icon of the notification.</param>
+/// <param name="Message">What was exported.</param>
+/// <param name="FilePath">The file which was written.</param>
+/// <param name="OffersOpening">Whether the file may be opened with the default program. False for an
+/// archive, which that program would only unpack, at least on macOS.</param>
+public readonly record struct DataFileExportSuccessMessage(string Key, string Icon, string Message, string FilePath, bool OffersOpening)
+{
+    /// <param name="snackbar">The notifications of the window.</param>
+    /// <param name="closesAutomatically">Whether the notification closes after a few seconds, like other success messages.</param>
+    public void Show(ISnackbar snackbar, bool closesAutomatically)
+    {
+        var parameters = new Dictionary<string, object>
+        {
+            [nameof(FileExportSuccessMessage.Message)] = this.Message,
+            [nameof(FileExportSuccessMessage.FilePath)] = this.FilePath,
+            [nameof(FileExportSuccessMessage.OffersOpening)] = this.OffersOpening
+        };
+
+        var icon = this.Icon;
+        snackbar.RemoveByKey(this.Key);
+        snackbar.Add<FileExportSuccessMessage>(parameters, Severity.Success, config =>
+        {
+            config.Icon = icon;
+            config.IconSize = Size.Large;
+            config.RequireInteraction = !closesAutomatically;
+            config.VisibleStateDuration = 10_000;
+            config.HideTransitionDuration = 600;
+        }, this.Key);
+    }
+}