Add map indicator for selected-band activity hints

src/main/java/kst4contest/view/map/MapCallsignRawSnapshot.java

@@ -20,6 +20,7 @@ public record MapCallsignRawSnapshot(
         double longitudeDeg,
         String bandSummary,
         Map<String, String> lastKnownFrequenciesByBand,
+        boolean offersSelectedBand,
         boolean warningToMyDirection,
         boolean worked,
         boolean selected,
@@ -59,9 +60,10 @@ public record MapCallsignRawSnapshot(
     }
 
     public String markerLabel() {
-        return bandSummary.isBlank()
+        String baseLabel = bandSummary.isBlank()
                 ? displayCallSign
                 : displayCallSign + " (" + bandSummary + ")";
+        return offersSelectedBand ? baseLabel + " ★" : baseLabel;
     }
 
     public String detailFrequencyText() {

src/main/java/kst4contest/view/map/MapCallsignRawSnapshotBuilder.java

@@ -8,11 +8,13 @@ import kst4contest.model.ChatMember;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Comparator;
+import java.util.EnumSet;
 import java.util.EnumMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.regex.Pattern;
 
 /**
  * Builds immutable map snapshots from the currently visible chat members.
@@ -22,8 +24,11 @@ import java.util.Map;
  */
 public final class MapCallsignRawSnapshotBuilder {
 
+    private static final Pattern TOKEN_SPLIT_PATTERN = Pattern.compile("[^A-Z0-9]+");
+
     public List<MapCallsignRawSnapshot> buildSnapshots(Collection<ChatMember> visibleChatMembers,
-                                                       ChatMember selectedChatMember) {
+                                                       ChatMember selectedChatMember,
+                                                       EnumSet<Band> selectedBands) {
 
         if (visibleChatMembers == null || visibleChatMembers.isEmpty()) {
             return List.of();
@@ -69,7 +74,9 @@ public final class MapCallsignRawSnapshotBuilder {
             Location location = new Location(locator6);
 
             LinkedHashMap<String, String> frequenciesByBand = collectLastKnownFrequenciesByBand(variants);
-            String bandSummary = String.join(", ", frequenciesByBand.keySet());
+            EnumSet<Band> sureBands = collectSureBands(variants, frequenciesByBand);
+            String bandSummary = buildBandSummary(sureBands);
+            boolean offersSelectedBand = hasAnySelectedBand(sureBands, selectedBands);
 
             boolean warningToMyDirection = variants.stream().anyMatch(ChatMember::isInAngleAndRange);
             boolean worked = variants.stream().anyMatch(this::isWorkedAtAnyBand);
@@ -92,6 +99,7 @@ public final class MapCallsignRawSnapshotBuilder {
                     location.getLongitude().toDegrees(),
                     bandSummary,
                     frequenciesByBand,
+                    offersSelectedBand,
                     warningToMyDirection,
                     worked,
                     selected,
@@ -182,6 +190,101 @@ public final class MapCallsignRawSnapshotBuilder {
         return ordered;
     }
 
+    private EnumSet<Band> collectSureBands(List<ChatMember> variants,
+                                           LinkedHashMap<String, String> frequenciesByBand) {
+        EnumSet<Band> sureBands = EnumSet.noneOf(Band.class);
+
+        if (frequenciesByBand != null) {
+            for (String label : frequenciesByBand.keySet()) {
+                Band mappedBand = bandFromDisplayLabel(label);
+                if (mappedBand != null) {
+                    sureBands.add(mappedBand);
+                }
+            }
+        }
+
+        for (ChatMember variant : variants) {
+            if (variant == null || variant.getName() == null || variant.getName().isBlank()) {
+                continue;
+            }
+            sureBands.addAll(detectBandsFromStationName(variant.getName()));
+        }
+
+        return sureBands;
+    }
+
+    private EnumSet<Band> detectBandsFromStationName(String stationName) {
+        EnumSet<Band> detectedBands = EnumSet.noneOf(Band.class);
+        if (stationName == null || stationName.isBlank()) {
+            return detectedBands;
+        }
+
+        String normalized = stationName.toUpperCase(Locale.ROOT);
+        String[] tokens = TOKEN_SPLIT_PATTERN.split(normalized);
+        for (String token : tokens) {
+            if (token == null || token.isBlank()) {
+                continue;
+            }
+
+            switch (token) {
+                case "2", "2M", "144", "144MHZ" -> detectedBands.add(Band.B_144);
+                case "70", "70CM", "432", "432MHZ" -> detectedBands.add(Band.B_432);
+                case "23", "23CM", "1296", "1296MHZ" -> detectedBands.add(Band.B_1296);
+                case "13", "13CM", "2300", "2320", "2320MHZ" -> detectedBands.add(Band.B_2320);
+                case "9", "9CM", "3400", "3400MHZ" -> detectedBands.add(Band.B_3400);
+                case "6", "6CM", "5600", "5760", "5760MHZ" -> detectedBands.add(Band.B_5760);
+                case "3", "3CM", "10G", "10GHZ", "10368", "10368MHZ" -> detectedBands.add(Band.B_10G);
+                case "24G", "24GHZ", "24048", "24048MHZ" -> detectedBands.add(Band.B_24G);
+                default -> {
+                }
+            }
+        }
+
+        return detectedBands;
+    }
+
+    private String buildBandSummary(EnumSet<Band> sureBands) {
+        if (sureBands == null || sureBands.isEmpty()) {
+            return "";
+        }
+
+        List<String> labels = sureBands.stream()
+                .sorted()
+                .map(this::toBandDisplayLabel)
+                .toList();
+        return String.join(", ", labels);
+    }
+
+    private boolean hasAnySelectedBand(EnumSet<Band> sureBands, EnumSet<Band> selectedBands) {
+        if (sureBands == null || sureBands.isEmpty() || selectedBands == null || selectedBands.isEmpty()) {
+            return false;
+        }
+        for (Band band : selectedBands) {
+            if (sureBands.contains(band)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private Band bandFromDisplayLabel(String label) {
+        if (label == null || label.isBlank()) {
+            return null;
+        }
+
+        return switch (label) {
+            case "144" -> Band.B_144;
+            case "432" -> Band.B_432;
+            case "1296" -> Band.B_1296;
+            case "2320" -> Band.B_2320;
+            case "3400" -> Band.B_3400;
+            case "5760" -> Band.B_5760;
+            case "10368" -> Band.B_10G;
+            case "24048" -> Band.B_24G;
+            default -> null;
+        };
+    }
+
     /**
      * Fallback for stations where the current displayed QRG exists but the
      * knownActiveBands history has not yet been filled.

src/main/java/kst4contest/view/map/StationMapBridge.java

@@ -11,6 +11,7 @@ import kst4contest.model.ChatPreferences;
 
 import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.EnumSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Objects;
@@ -142,8 +143,13 @@ public final class StationMapBridge {
     private void refreshNow() {
         List<ChatMember> visibleChatMembers = new ArrayList<>(chatController.getLst_chatMemberSortedFilteredList());
         ChatMember selectedChatMember = chatController.getScoreService().getSelectedChatMember();
+        EnumSet<Band> selectedBands = chatController.getReachabilityService().getEnabledStationBands();
 
-        List<MapCallsignRawSnapshot> snapshots = snapshotBuilder.buildSnapshots(visibleChatMembers, selectedChatMember);
+        List<MapCallsignRawSnapshot> snapshots = snapshotBuilder.buildSnapshots(
+                visibleChatMembers,
+                selectedChatMember,
+                selectedBands
+        );
 
         MapCallsignRawSnapshot selectedSnapshot = null;
         if (selectedChatMember != null && selectedChatMember.getCallSignRaw() != null) {

src/main/java/kst4contest/view/map/StationMapView.java

@@ -855,7 +855,11 @@ public final class StationMapView {
         detailLocatorValue.setText(selectedSnapshot.locator6());
         detailQrbValue.setText(String.format(Locale.US, "%.0f km", selectedSnapshot.qrbKm()));
         detailQtfValue.setText(String.format(Locale.US, "%.0f°", selectedSnapshot.qtfDeg()));
-        detailBandsValue.setText(selectedSnapshot.bandSummary().isBlank() ? "-" : selectedSnapshot.bandSummary());
+        String bandText = selectedSnapshot.bandSummary().isBlank() ? "-" : selectedSnapshot.bandSummary();
+        if (selectedSnapshot.offersSelectedBand()) {
+            bandText += " ★";
+        }
+        detailBandsValue.setText(bandText);
         detailFrequenciesArea.setText(selectedSnapshot.detailFrequencyText());
         detailAirplanesValue.setText(String.valueOf(selectedSnapshot.reachableAirplanes()));
         triggerClusterSpotButton.setDisable(false);

src/test/java/kst4contest/test/MapCallsignRawSnapshotBuilderTest.java

@@ -0,0 +1,56 @@
+package kst4contest.test;
+
+import kst4contest.model.Band;
+import kst4contest.model.ChatMember;
+import kst4contest.view.map.MapCallsignRawSnapshot;
+import kst4contest.view.map.MapCallsignRawSnapshotBuilder;
+import org.junit.jupiter.api.Test;
+
+import java.util.EnumSet;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class MapCallsignRawSnapshotBuilderTest {
+
+    @Test
+    void marksSnapshotWhenNameAdvertisesSelectedBand() {
+        ChatMember station = buildStation("DL1ABC", "QRV 2-70-23", "JN58TD", 1_000L);
+
+        MapCallsignRawSnapshotBuilder builder = new MapCallsignRawSnapshotBuilder();
+        List<MapCallsignRawSnapshot> snapshots = builder.buildSnapshots(
+                List.of(station),
+                null,
+                EnumSet.of(Band.B_1296)
+        );
+
+        assertEquals(1, snapshots.size());
+        assertTrue(snapshots.get(0).offersSelectedBand());
+    }
+
+    @Test
+    void keepsSnapshotUnmarkedWhenNoSelectedBandMatches() {
+        ChatMember station = buildStation("DL1ABC", "QRV 2m only", "JN58TD", 1_000L);
+
+        MapCallsignRawSnapshotBuilder builder = new MapCallsignRawSnapshotBuilder();
+        List<MapCallsignRawSnapshot> snapshots = builder.buildSnapshots(
+                List.of(station),
+                null,
+                EnumSet.of(Band.B_2320)
+        );
+
+        assertEquals(1, snapshots.size());
+        assertFalse(snapshots.get(0).offersSelectedBand());
+    }
+
+    private ChatMember buildStation(String callSign, String name, String locator, long activityEpoch) {
+        ChatMember chatMember = new ChatMember();
+        chatMember.setCallSign(callSign);
+        chatMember.setName(name);
+        chatMember.setQra(locator);
+        chatMember.setActivityTimeLastInEpoch(activityEpoch);
+        return chatMember;
+    }
+}