Put the contacts of the last 20 minutes on the bandmap as local spots

A contest opening and contacts arriving from the other stations, a
resync included, spot the contacts logged in the last few minutes (a
setting on the telnet Filters tab, 0 for none). A station the bandmap
already holds on that band keeps its spot. Nothing is sent out. Spots
that come from the log are drawn in italics.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Nonemm.App/AppSession.cs

@@ -346,6 +346,7 @@ public sealed partial class AppSession : IDisposable
         Logging.Edited += (_, change) =>
             _ = link?.SendEditedAsync(change.Qso, change.OldCall, change.OldTimestampUtc);
         Logging.Deleted += (_, qso) => _ = link?.SendDeletedAsync(qso);
+        SpotRecentContacts(Logging.Log.Qsos);
         Check = new CheckWindowSources(positions[0], Calls, Bandmap);
         Available = new AvailableStations(positions[0], Bandmap);
         Save(Settings with { ContestNumber = contestNumber });
@@ -663,6 +664,7 @@ public sealed partial class AppSession : IDisposable
             // a run of new contacts is applied before the update that follows
             // it, because that update may be a clear or an edit of one of them
             Logging.AddRangeFromNetwork(logged);
+            SpotRecentContacts(logged);
             logged.Clear();
             switch (update)
             {
@@ -678,6 +680,34 @@ public sealed partial class AppSession : IDisposable
             }
         }
         Logging.AddRangeFromNetwork(logged);
+        SpotRecentContacts(logged);
+    }
+
+    /// Puts the contacts of the last few minutes on the bandmap as local spots,
+    /// so a restart does not lose the stations just worked. A station the
+    /// bandmap already holds on that band keeps its spot. Nothing is sent to
+    /// the other stations or the cluster.
+    private void SpotRecentContacts(IEnumerable<Qso> contacts)
+    {
+        if (Settings.RecentContactSpotMinutes <= 0)
+        {
+            return;
+        }
+        DateTime since = DateTime.UtcNow - TimeSpan.FromMinutes(Settings.RecentContactSpotMinutes);
+        HashSet<(string, Band?)> held = [.. Bandmap.All().Select(s => (s.Call.Text, s.Band))];
+        List<Spot> spots = [];
+        foreach (Qso qso in contacts.Where(q => q.TimestampUtc >= since && Logging!.Contest.IsContact(q)))
+        {
+            Spot spot = new(qso.Call, qso.Frequency, qso.TimestampUtc, SpotSource.Log);
+            if (held.Add((spot.Call.Text, spot.Band)))
+            {
+                spots.Add(spot);
+            }
+        }
+        if (spots.Count > 0)
+        {
+            Bandmap.AddRange(spots);
+        }
     }
 
     /// Starts, restarts or stops the keyer, following what the settings say.

src/Nonemm.App/Configuration/Settings.cs

@@ -105,6 +105,11 @@ public sealed record Settings
     /// boxes are wiped. N1MM uses 2 kHz.
     public int QsySpotHertz { get; init; } = 2000;
 
+    /// Contacts logged in the last this many minutes are put on the bandmap
+    /// when a contest is opened and when contacts arrive from the other
+    /// stations, as local spots. Zero turns it off.
+    public int RecentContactSpotMinutes { get; init; } = 20;
+
     /// How far the radio can move off the CQ frequency, in hertz, before a
     /// running position goes back to searching.
     public int CqLeaveHertz { get; init; } = 3000;

src/Nonemm.App/Windows/BandmapView.cs

@@ -50,6 +50,7 @@ public sealed class BandmapView : Control
 
     private readonly Typeface typeface = new(Fonts.Mono);
     private readonly Typeface boldTypeface = new(Fonts.Mono, FontStyle.Normal, FontWeight.Bold);
+    private readonly Typeface italicTypeface = new(Fonts.Mono, FontStyle.Italic);
     private IReadOnlyList<BandmapLabel> placed = [];
     private BandmapScale scale = new(Bands.Band20M.Low, Bands.Band20M.High, 1);
 
@@ -181,7 +182,12 @@ public sealed class BandmapView : Control
             new Point(ScaleX + 2, label.MarkY),
             new Point(LabelX - 2, label.LabelY + (LabelHeight / 2)));
         context.DrawText(
-            Text(label.Spot.Call.Text, colour, TextSize, label.Spot.IsLocal || label.Spot.IsCqFrequency),
+            Text(
+                label.Spot.Call.Text,
+                colour,
+                TextSize,
+                label.Spot.IsLocal || label.Spot.IsCqFrequency,
+                label.Spot.Source == SpotSource.Log),
             new Point(LabelX, label.LabelY + (LabelPadding / 2)));
     }
 
@@ -221,8 +227,14 @@ public sealed class BandmapView : Control
         FrequencyPicked?.Invoke(this, scale.At(at.Y - Inset));
     }
 
-    private FormattedText Text(string text, IBrush brush, double size, bool bold = false) =>
-        new(text, CultureInfo.InvariantCulture, FlowDirection.LeftToRight, bold ? boldTypeface : typeface, size, brush);
+    private FormattedText Text(string text, IBrush brush, double size, bool bold = false, bool italic = false) =>
+        new(
+            text,
+            CultureInfo.InvariantCulture,
+            FlowDirection.LeftToRight,
+            bold ? boldTypeface : italic ? italicTypeface : typeface,
+            size,
+            brush);
 
     /// The form's text colour, which the theme sets in both light and dark.
     private IBrush Foreground() =>

src/Nonemm.App/Windows/TelnetWindow.Filters.cs

@@ -50,6 +50,7 @@ public sealed partial class TelnetWindow
         BlockedCallsBox.Text = string.Join(' ', filter.BlockedCalls);
         TimeoutBox.Text = session.Settings.SpotTimeoutMinutes.ToString(CultureInfo.InvariantCulture);
         QsySpotBox.Text = session.Settings.QsySpotHertz.ToString(CultureInfo.InvariantCulture);
+        RecentSpotBox.Text = session.Settings.RecentContactSpotMinutes.ToString(CultureInfo.InvariantCulture);
         CqLeaveBox.Text = session.Settings.CqLeaveHertz.ToString(CultureInfo.InvariantCulture);
         SpotCommentBox.Text = session.Settings.SpotComment;
     }
@@ -75,6 +76,9 @@ public sealed partial class TelnetWindow
             RandomizeSpots = RandomizeBox.IsChecked == true,
             SpotTimeoutMinutes = Minutes(TimeoutBox.Text, session.Settings.SpotTimeoutMinutes),
             QsySpotHertz = Minutes(QsySpotBox.Text, session.Settings.QsySpotHertz),
+            RecentContactSpotMinutes = int.TryParse(RecentSpotBox.Text, out int recent) && recent >= 0
+                ? recent
+                : session.Settings.RecentContactSpotMinutes,
             CqLeaveHertz = Minutes(CqLeaveBox.Text, session.Settings.CqLeaveHertz),
         });
         Show("*** filters applied — they hold for the spots that arrive from now on", NoticeColour);

src/Nonemm.App/Windows/TelnetWindow.axaml

@@ -126,6 +126,8 @@
           <TextBox Name="QsySpotBox" Width="60" HorizontalAlignment="Left" />
           <TextBlock Classes="label" Text="Go back to search and pounce when the radio moves off the CQ frequency by more than (Hz)" TextWrapping="Wrap" />
           <TextBox Name="CqLeaveBox" Width="60" HorizontalAlignment="Left" />
+          <TextBlock Classes="label" Text="Spot the contacts logged in the last (minutes) on opening and resync, 0 for none" TextWrapping="Wrap" />
+          <TextBox Name="RecentSpotBox" Width="60" HorizontalAlignment="Left" />
           <Button Content="Apply" Click="OnApplyFilters" Margin="0,10,0,0" />
         </StackPanel>
       </ScrollViewer>