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

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

@@ -0,0 +1,75 @@
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Components;
+
+/// <summary>
+/// Shows how long something has been running, counting up every second.
+/// </summary>
+/// <remarks>
+/// A model which thinks for minutes shows nothing for just as long, and the time is what tells the user
+/// that it still works. The component owns its timer and renders only itself once a second, not the
+/// page around it: an assistant would otherwise render its entire form every second.
+/// </remarks>
+public partial class ElapsedTime : MSGComponentBase
+{
+    private static readonly TimeSpan TICK_INTERVAL = TimeSpan.FromSeconds(1);
+
+    /// <summary>
+    /// When it started.
+    /// </summary>
+    [Parameter]
+    public DateTimeOffset Start { get; set; }
+
+    /// <summary>Stops counting.</summary>
+    private readonly CancellationTokenSource tickCancellation = new();
+
+    #region Overrides of ComponentBase
+
+    protected override async Task OnInitializedAsync()
+    {
+        await base.OnInitializedAsync();
+        this.TickAsync(this.tickCancellation.Token).Observe($"{nameof(ElapsedTime)}: counting the elapsed time");
+    }
+
+    #endregion
+
+    #region Overrides of MSGComponentBase
+
+    protected override void DisposeResources()
+    {
+        this.tickCancellation.Cancel();
+        this.tickCancellation.Dispose();
+        base.DisposeResources();
+    }
+
+    #endregion
+
+    /// <summary>
+    /// Writes a time span as minutes and seconds, and with the hours in front from the first hour on.
+    /// </summary>
+    /// <param name="elapsed">The time span; a negative one, e.g., after the clock was set back, counts as none.</param>
+    /// <returns>The time span, such as 4:07 or 1:02:09.</returns>
+    internal static string Format(TimeSpan elapsed)
+    {
+        if (elapsed < TimeSpan.Zero)
+            elapsed = TimeSpan.Zero;
+
+        var hours = (int)elapsed.TotalHours;
+        return hours > 0
+            ? $"{hours}:{elapsed.Minutes:00}:{elapsed.Seconds:00}"
+            : $"{elapsed.Minutes}:{elapsed.Seconds:00}";
+    }
+
+    private async Task TickAsync(CancellationToken token)
+    {
+        using var timer = new PeriodicTimer(TICK_INTERVAL);
+        try
+        {
+            while (await timer.WaitForNextTickAsync(token))
+                await this.InvokeAsync(this.StateHasChanged);
+        }
+        catch (OperationCanceledException) when (token.IsCancellationRequested)
+        {
+        }
+    }
+}