Make MMS file-transfer failures directly visible and copyable

FaultRecordWindow.Diagnostics.cs

@@ -1,11 +1,18 @@
+using System.Collections.Specialized;
+using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
+using System.Windows.Threading;
 
 namespace ArIED61850Tester;
 
 public partial class FaultRecordWindow
 {
+    private bool _diagnosticHooksInstalled;
+    private string _selectedTransferDiagnostic =
+        "No transfer failure has been recorded. Run a download, then select a failed row.";
+
     static FaultRecordWindow()
     {
         EventManager.RegisterClassHandler(
@@ -15,6 +22,12 @@ static FaultRecordWindow()
             handledEventsToo: true);
     }
 
+    public string SelectedTransferDiagnostic
+    {
+        get => _selectedTransferDiagnostic;
+        private set => Set(ref _selectedTransferDiagnostic, value ?? string.Empty);
+    }
+
     private static void OnFaultRecordRowLoaded(object sender, RoutedEventArgs e)
     {
         if (sender is not DataGridRow row ||
@@ -34,4 +47,105 @@ private static void OnFaultRecordRowLoaded(object sender, RoutedEventArgs e)
             });
         ToolTipService.SetShowDuration(row, 30_000);
     }
-}
+
+    private void Diagnostics_ContentRendered(object? sender, EventArgs e)
+    {
+        if (_diagnosticHooksInstalled)
+            return;
+
+        _diagnosticHooksInstalled = true;
+        Records.CollectionChanged += DiagnosticRecords_CollectionChanged;
+        foreach (var row in Records)
+            AttachDiagnosticRow(row);
+    }
+
+    private void DiagnosticRecords_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
+    {
+        if (e.NewItems != null)
+        {
+            foreach (var item in e.NewItems.OfType<FaultRecordRow>())
+                AttachDiagnosticRow(item);
+        }
+
+        if (e.OldItems != null)
+        {
+            foreach (var item in e.OldItems.OfType<FaultRecordRow>())
+                item.PropertyChanged -= DiagnosticRow_PropertyChanged;
+        }
+    }
+
+    private void AttachDiagnosticRow(FaultRecordRow row)
+    {
+        row.PropertyChanged -= DiagnosticRow_PropertyChanged;
+        row.PropertyChanged += DiagnosticRow_PropertyChanged;
+    }
+
+    private void DiagnosticRow_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (sender is not FaultRecordRow row ||
+            e.PropertyName != nameof(FaultRecordRow.Detail) ||
+            string.IsNullOrWhiteSpace(row.Detail) ||
+            !row.Status.Equals("Failed", StringComparison.OrdinalIgnoreCase))
+        {
+            return;
+        }
+
+        ShowTransferDiagnostic(row, expand: true);
+    }
+
+    private void FaultRecordsGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (FaultRecordsGrid.SelectedItem is FaultRecordRow row &&
+            !string.IsNullOrWhiteSpace(row.Detail))
+        {
+            ShowTransferDiagnostic(
+                row,
+                expand: row.Status.Equals("Failed", StringComparison.OrdinalIgnoreCase));
+        }
+    }
+
+    private void ShowTransferDiagnostic(FaultRecordRow row, bool expand)
+    {
+        void Apply()
+        {
+            SelectedTransferDiagnostic = BuildVisibleDiagnostic(row);
+            if (!ReferenceEquals(FaultRecordsGrid.SelectedItem, row))
+                FaultRecordsGrid.SelectedItem = row;
+            FaultRecordsGrid.ScrollIntoView(row);
+            if (expand)
+                TransferDiagnosticsExpander.IsExpanded = true;
+        }
+
+        if (Dispatcher.CheckAccess())
+            Apply();
+        else
+            Dispatcher.BeginInvoke(DispatcherPriority.DataBind, new Action(Apply));
+    }
+
+    private string BuildVisibleDiagnostic(FaultRecordRow row)
+        => $"Device            : {DeviceName}\r\n" +
+           $"Endpoint          : {EndpointText}\r\n" +
+           $"Record            : {row.RecordName}\r\n" +
+           $"Remote directory  : {row.RemoteDirectory}\r\n" +
+           $"Files             : {row.FilesText}\r\n" +
+           $"Status            : {row.Status}\r\n" +
+           $"Captured local    : {DateTimeOffset.Now:O}\r\n" +
+           new string('=', 76) + "\r\n" +
+           row.Detail.Trim();
+
+    private void CopyDiagnostic_Click(object sender, RoutedEventArgs e)
+    {
+        if (string.IsNullOrWhiteSpace(SelectedTransferDiagnostic))
+            return;
+
+        try
+        {
+            Clipboard.SetText(SelectedTransferDiagnostic);
+            StatusText = "Transfer diagnostic copied to the clipboard.";
+        }
+        catch (Exception ex)
+        {
+            StatusText = $"Could not copy the transfer diagnostic: {ex.Message}";
+        }
+    }
+}

FaultRecordWindow.xaml

@@ -2,11 +2,12 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="IEC 61850 Fault Records"
-        Width="1120" Height="720" MinWidth="900" MinHeight="560"
+        Width="1120" Height="760" MinWidth="900" MinHeight="600"
         WindowStartupLocation="CenterOwner"
         Background="#F4F7FB"
         FontFamily="Aptos, Segoe UI Variable Text, Segoe UI, Calibri"
         Loaded="Window_Loaded"
+        ContentRendered="Diagnostics_ContentRendered"
         Closed="Window_Closed">
     <Window.Resources>
         <Style x:Key="PanelStyle" TargetType="Border">
@@ -80,6 +81,8 @@
             <RowDefinition Height="*"/>
             <RowDefinition Height="10"/>
             <RowDefinition Height="Auto"/>
+            <RowDefinition Height="10"/>
+            <RowDefinition Height="Auto"/>
         </Grid.RowDefinitions>
 
         <Border Grid.Row="0" Style="{StaticResource PanelStyle}">
@@ -144,10 +147,11 @@
                     <TextBlock Text="Discovered COMTRADE records" FontSize="13.5" FontWeight="SemiBold" Foreground="#26364D"/>
                     <TextBlock Grid.Column="1" Text="{Binding SelectionSummary, Mode=OneWay}" FontSize="11.5" Foreground="#68778D" VerticalAlignment="Center"/>
                 </Grid>
-                <DataGrid Grid.Row="1" ItemsSource="{Binding Records, Mode=OneWay}" AutoGenerateColumns="False"
+                <DataGrid x:Name="FaultRecordsGrid" Grid.Row="1" ItemsSource="{Binding Records, Mode=OneWay}" AutoGenerateColumns="False"
                           CanUserAddRows="False" CanUserDeleteRows="False" CanUserResizeRows="False"
                           HeadersVisibility="Column" GridLinesVisibility="All" BorderThickness="0"
-                          SelectionMode="Extended" SelectionUnit="FullRow" Background="White">
+                          SelectionMode="Single" SelectionUnit="FullRow" Background="White"
+                          SelectionChanged="FaultRecordsGrid_SelectionChanged">
                     <DataGrid.Columns>
                         <DataGridTemplateColumn Header="Get" Width="48">
                             <DataGridTemplateColumn.CellTemplate>
@@ -169,7 +173,39 @@
             </Grid>
         </Border>
 
-        <Border Grid.Row="6" Style="{StaticResource PanelStyle}">
+        <Expander x:Name="TransferDiagnosticsExpander" Grid.Row="6" IsExpanded="False"
+                  Background="White" BorderBrush="#D9E2EF" BorderThickness="1" Padding="12,8">
+            <Expander.Header>
+                <StackPanel Orientation="Horizontal">
+                    <TextBlock Text="Transfer diagnostics" FontSize="12.5" FontWeight="SemiBold" Foreground="#26364D"/>
+                    <TextBlock Text="  •  automatically opens on failure" FontSize="11.5" Foreground="#78869A" VerticalAlignment="Center"/>
+                </StackPanel>
+            </Expander.Header>
+            <Grid Margin="0,9,0,0">
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="Auto"/>
+                    <RowDefinition Height="7"/>
+                    <RowDefinition Height="Auto"/>
+                </Grid.RowDefinitions>
+                <Grid Grid.Row="0">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="Auto"/>
+                    </Grid.ColumnDefinitions>
+                    <TextBlock Text="Exact failing stage, invoke ID, FRSM, FileRead block, session state, and MMS request/response hex."
+                               FontSize="11.5" Foreground="#607089" VerticalAlignment="Center"/>
+                    <Button Grid.Column="1" Content="Copy diagnostics" Click="CopyDiagnostic_Click"
+                            Style="{StaticResource SecondaryButtonStyle}" Height="30" Padding="12,3"/>
+                </Grid>
+                <TextBox Grid.Row="2" Text="{Binding SelectedTransferDiagnostic, Mode=OneWay}"
+                         Height="170" IsReadOnly="True" AcceptsReturn="True" TextWrapping="NoWrap"
+                         VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"
+                         FontFamily="Cascadia Mono, Consolas, Courier New" FontSize="11"
+                         Padding="9" Background="#F8FAFD" BorderBrush="#CBD8E8"/>
+            </Grid>
+        </Expander>
+
+        <Border Grid.Row="8" Style="{StaticResource PanelStyle}">
             <Grid>
                 <Grid.RowDefinitions>
                     <RowDefinition Height="Auto"/>
@@ -194,4 +230,4 @@
             </Grid>
         </Border>
     </Grid>
-</Window>
+</Window>