add TFL bus stop caching and fetching functionality, enhance map rendering with bus stop markers

lib/main.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:rra_app/pages/map/page.dart';
+import 'package:rra_app/pages/map/tfl/tfl_bus_stop_cache.dart';
 import 'package:rra_app/pages/map/tiles/hive_tile_cache.dart';
 import 'package:shadcn_flutter/shadcn_flutter.dart' as shadcn;
 import 'package:hive_flutter/hive_flutter.dart';
@@ -9,6 +10,7 @@ Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await Hive.initFlutter();
   await HiveTileCache.init();
+  await TflBusStopCache.init();
   runApp(const MyApp());
 }
 

lib/pages/map/constants.dart

@@ -8,13 +8,19 @@ final Color kMapWaterColor = Color(0xFF74B8ED);
 final Color kMapBuildingFillColor = Color(0xFFFED000);
 final Color kMapBuildingOutlineColor = Color(0xFFE7B600);
 
+final Color kMapCommercialAreaColor = Color(0xFFF5C87A);
+final Color kMapCommercialAreaOutlineColor = Color(0xFFE0A84A);
+
+final Color kMapParkingColor = Color(0xFFDDE3EE);
+final Color kMapParkingOutlineColor = Color(0xFFC2CBDB);
+
 final Color kMapRoadFillColor = Color(0xFFFEFEFF);
 final Color kMapPathFillColour = Color(0xFFD9E0F0);
 
 final Color kMapDebugTileBoundaryColor = Color(0xCCFF2D55);
 
 final Color kMapPlaceLabelColor = Color(0xFF1F2636);
-final Color kMapPlaceLabelHaloColor = Color(0xF7FFFFFF);
+final Color kMapPlaceLabelHaloColor = Color(0xFFA7BFDB);
 
 final Color kMapRoadLabelColor = Color(0xFF56657A);
 final Color kMapRoadLabelHaloColor = Color(0xF2FFFFFF);
@@ -24,3 +30,5 @@ final Color kMapRailUnderlayColor = Color(0xFF8A97A8);
 
 final Color kMapPoiLabelColor = Color(0xFF032D51);
 final Color kMapPoiLabelHaloColor = Color(0xF2FFFFFF);
+
+const bool kMapDebugShowTileBoundaries = false;

lib/pages/map/page.dart

@@ -12,9 +12,13 @@ import 'package:flutter/gestures.dart'
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:go_router/go_router.dart';
+import 'package:google_fonts/google_fonts.dart';
 import 'package:latlong2/latlong.dart' show LatLng;
 import 'package:rra_app/pages/map/routing/osrm_routing_service.dart';
+import 'package:rra_app/pages/map/tfl/tfl_bus_stop_cache.dart';
+import 'package:rra_app/pages/map/tfl/tfl_bus_stop_service.dart';
 import 'package:rra_app/pages/map/vector/mapbox_vector_tile_cache.dart';
+import 'package:rra_app/pages/map/vector/mvt_parser.dart' show MvtGeometryType;
 import 'package:rra_app/pages/map/vector/tile_pyramid_cache.dart';
 import 'package:rra_app/pages/map/vector/tile_pyramid_painter.dart';
 import 'package:rra_app/pages/map/widgets/toolbar.dart';
@@ -80,6 +84,12 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
   Timer? _interactionIdleTimer;
   MapDebugHit? _debugFeatureHit;
 
+  final TflBusStopService _busStopService = TflBusStopService();
+  List<BusStop> _busStops = const [];
+  Timer? _busStopFetchTimer;
+  // zoom threshold below which we dont bother fetching
+  static const _busStopMinZoom = 18.0;
+
   late final TilePyramidPainter _pyramidPainter;
 
   final List<double> _frameMsWindow = <double>[];
@@ -110,6 +120,7 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
     TilePyramidCache.clear();
     SchedulerBinding.instance.removeTimingsCallback(_onFrameTimings);
     _interactionIdleTimer?.cancel();
+    _busStopFetchTimer?.cancel();
     super.dispose();
   }
 
@@ -383,6 +394,7 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
       ..devicePixelRatio = _devicePixelRatio
       ..interactionActive = _interactionIdleTimer?.isActive ?? false;
     _pyramidPainter.markDirty();
+    _scheduleBusStopFetch();
   }
 
   LatLng _segmentMidpoint(LatLng a, LatLng b) {
@@ -449,6 +461,139 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
     });
   }
 
+  void _inspectBusStop(BusStop stop) {
+    final props = <String, Object?>{
+      'name': stop.name,
+      if (stop.stopLetter != null) 'stop_letter': stop.stopLetter,
+      if (stop.towards != null) 'towards': stop.towards,
+      'naptan_id': stop.id,
+      'lat': stop.position.latitude.toStringAsFixed(6),
+      'lon': stop.position.longitude.toStringAsFixed(6),
+    };
+
+    setState(() {
+      _debugFeatureHit = MapDebugHit(
+        layerName: 'bus_stop',
+        geometryType: MvtGeometryType.point,
+        properties: props,
+        tileZ: 0,
+        tileX: 0,
+        tileY: 0,
+        distance: 0,
+      );
+      _isInspectingFeature = false;
+    });
+  }
+
+  void _scheduleBusStopFetch() {
+    _busStopFetchTimer?.cancel();
+    if (_zoom < _busStopMinZoom) {
+      if (_busStops.isNotEmpty) setState(() => _busStops = const []);
+      return;
+    }
+
+    _busStopFetchTimer = Timer(const Duration(milliseconds: 600), () {
+      _fetchBusStops();
+    });
+  }
+
+  Future<void> _fetchBusStops() async {
+    if (_zoom < _busStopMinZoom || !mounted) return;
+
+    final cacheKey = TflBusStopCache.keyFor(_mapCenter);
+
+    // phase 1: show cached stops immediately
+    final cached = TflBusStopCache.peek(cacheKey);
+    if (cached != null && mounted) {
+      setState(() => _busStops = cached);
+    }
+
+    // phase 2: fetch from TfL and refresh
+    final mpp = TflBusStopService.metersPerPixel(_mapCenter.latitude, _zoom);
+    final halfDiag = (_mapSize.longestSide / 2) * mpp;
+    final radius = halfDiag.clamp(200, 800).toInt();
+
+    try {
+      final stops = await _busStopService.fetchNearby(
+        _mapCenter,
+        radius: radius,
+      );
+      if (!mounted) return;
+      setState(() => _busStops = stops);
+      await TflBusStopCache.store(cacheKey, stops);
+    } catch (_) {
+      // silently swallow
+    }
+  }
+
+  List<Widget> _buildBusStopWidgets() {
+    if (_zoom < _busStopMinZoom || _busStops.isEmpty) return const [];
+
+    // first pass: collect visible stops + their raw screen positions
+    final visible = <BusStop>[];
+    final positions = <Offset>[];
+
+    for (final stop in _busStops) {
+      final screen = _latLngToScreen(stop.position);
+      if (screen.dx < -20 || screen.dx > _mapSize.width + 20) continue;
+      if (screen.dy < -20 || screen.dy > _mapSize.height + 20) continue;
+      visible.add(stop);
+      positions.add(screen);
+    }
+
+    // repulsion pass — push overlapping markers apart in screen space
+    // only affects rendering positions, not the underlying LatLng data
+    const minDist = 28.0;
+    const iterations = 6;
+
+    for (var iter = 0; iter < iterations; iter++) {
+      for (var i = 0; i < positions.length; i++) {
+        for (var j = i + 1; j < positions.length; j++) {
+          final dx = positions[j].dx - positions[i].dx;
+          final dy = positions[j].dy - positions[i].dy;
+          final dist = math.sqrt(dx * dx + dy * dy);
+
+          if (dist >= minDist || dist < 0.001) continue;
+
+          final overlap = (minDist - dist) / 2;
+          final nx = dx / dist;
+          final ny = dy / dist;
+
+          positions[i] = Offset(
+            positions[i].dx - nx * overlap,
+            positions[i].dy - ny * overlap,
+          );
+          positions[j] = Offset(
+            positions[j].dx + nx * overlap,
+            positions[j].dy + ny * overlap,
+          );
+        }
+      }
+    }
+
+    final widgets = <Widget>[];
+    for (var i = 0; i < visible.length; i++) {
+      final stop = visible[i];
+      final screen = positions[i];
+      widgets.add(
+        Positioned(
+          left: screen.dx - 13,
+          top: screen.dy - 13,
+          child: GestureDetector(
+            behavior: HitTestBehavior.opaque,
+            onTap: () => _inspectBusStop(stop),
+            child: Tooltip(
+              message: stop.name,
+              child: _BusStopMarker(stop: stop),
+            ),
+          ),
+        ),
+      );
+    }
+
+    return widgets;
+  }
+
   List<Widget> _buildPointWidgets() {
     final widgets = <Widget>[];
     for (var i = 0; i < _points.length; i++) {
@@ -632,6 +777,7 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
                               ),
                             ),
                           ),
+                          ..._buildBusStopWidgets(),
                           ..._buildPointWidgets(),
                           ..._buildInsertHandles(),
                         ],
@@ -701,6 +847,25 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
                         frameMs: _displayFrameMs,
                       ),
                     ),
+                    const SizedBox(height: 6),
+                    GestureDetector(
+                      onTap: () {
+                        TilePyramidCache.clear();
+                        MapboxVectorTileCache.clear();
+                        _pyramidPainter.markDirty();
+                      },
+                      child: Container(
+                        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+                        decoration: BoxDecoration(
+                          color: Colors.black.withValues(alpha: 0.55),
+                          borderRadius: BorderRadius.circular(6),
+                        ),
+                        child: const Text(
+                          'Clear Cache',
+                          style: TextStyle(color: Colors.white, fontSize: 11),
+                        ),
+                      ),
+                    ),
                     const SizedBox(height: 8),
                     _DebugInspectPanel(
                       hit: _debugFeatureHit,
@@ -711,13 +876,13 @@ class _MapPageState extends State<MapPage> with TickerProviderStateMixin {
               ),
             ),
           ),
-          SafeArea(
-            child: Align(
-              alignment: Alignment.bottomLeft,
-              child: Padding(
-                padding: const EdgeInsets.all(10),
-                child: const IgnorePointer(child: _HudCornerNotice()),
-              ),
+          Positioned(
+            bottom: 0,
+            left: 0,
+            right: 0,
+            child: _MapFooter(
+              mapCenter: _mapCenter,
+              zoom: _zoom,
             ),
           ),
         ],
@@ -765,30 +930,85 @@ class _RoutePainter extends CustomPainter {
   }
 }
 
-class _HudCornerNotice extends StatelessWidget {
-  const _HudCornerNotice();
+class _MapFooter extends StatelessWidget {
+  const _MapFooter({required this.mapCenter, required this.zoom});
+
+  final LatLng mapCenter;
+  final double zoom;
 
   @override
   Widget build(BuildContext context) {
-    return DecoratedBox(
+    final borderColor = const Color(0xFFE5E7EB);
+    final bg = Colors.white;
+    final muted = const Color(0xFF6B7280);
+
+    TextStyle footerStyle() => GoogleFonts.ibmPlexMono(
+      fontSize: 11,
+      height: 1,
+      fontWeight: FontWeight.w600,
+      color: muted,
+    );
+
+    Widget txt(String s) => Transform.translate(
+      offset: const Offset(0, -1),
+      child: Text(s, style: footerStyle()),
+    );
+
+    Widget divider() => const Padding(
+      padding: EdgeInsets.symmetric(horizontal: 5),
+      child: SizedBox(
+        height: 12,
+        child: VerticalDivider(width: 1, color: Color(0xFFD1D5DB)),
+      ),
+    );
+
+    final latStr = mapCenter.latitude.toStringAsFixed(4);
+    final lngStr = mapCenter.longitude.toStringAsFixed(4);
+
+    Widget viewportBlock() {
+      return Wrap(
+        alignment: WrapAlignment.center,
+        crossAxisAlignment: WrapCrossAlignment.center,
+        children: [
+          txt("$latStr, $lngStr"),
+          divider(),
+          txt("Zoom: ${zoom.toStringAsFixed(1)}"),
+        ],
+      );
+    }
+
+
+    Widget copyrightBlock() {
+      return txt("© 2026 IMBENJI.NET LTD - Roadbound");
+    }
+
+    Widget versionBlock() {
+      return txt("Alpha v2602-7a");
+    }
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+      width: double.infinity,
       decoration: BoxDecoration(
-        color: Colors.white.withValues(alpha: 0.8),
-        borderRadius: BorderRadius.circular(4),
+        color: bg,
+        border: Border(top: BorderSide(color: borderColor, width: 1)),
       ),
-      child: const Padding(
-        padding: EdgeInsets.symmetric(horizontal: 10, vertical: 8),
-        child: Text(
-          '© 2026 IMBENJI.NET LTD - Roadbound Map Maker\n'
-          'Alpha v2602-7a - This is a public alpha release;\n'
-          'Expect bugs, missing features, and breaking changes.',
-          style: TextStyle(
-            fontSize: 12,
-            height: 1.35,
-            fontWeight: FontWeight.w700,
-            color: Color(0xFF525252),
-            fontFamily: 'monospace',
+      child: Row(
+        children: [
+          Expanded(child: Row(children: [copyrightBlock()])),
+          Expanded(
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [viewportBlock()],
             ),
           ),
+          Expanded(
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.end,
+              children: [versionBlock()],
+            ),
+          ),
+        ],
       ),
     );
   }
@@ -991,3 +1211,42 @@ class _StatusPanel extends StatelessWidget {
     );
   }
 }
+
+class _BusStopMarker extends StatelessWidget {
+  const _BusStopMarker({required this.stop});
+
+  final BusStop stop;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: 26,
+      height: 26,
+      child: DecoratedBox(
+        decoration: BoxDecoration(
+          color: const Color(0xFFD50000),
+          shape: BoxShape.circle,
+          border: Border.all(color: Colors.white, width: 1.5),
+          boxShadow: const [
+            BoxShadow(
+              color: Color(0x44000000),
+              blurRadius: 3,
+              offset: Offset(0, 1),
+            ),
+          ],
+        ),
+        child: Center(
+          child: Text(
+            stop.stopLetter ?? 'B',
+            style: TextStyle(
+              fontSize: stop.stopLetter != null && stop.stopLetter!.length > 1 ? 9 : 11,
+              fontWeight: FontWeight.w900,
+              color: Colors.white,
+              height: 1,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/pages/map/tfl/tfl_bus_stop_cache.dart

@@ -0,0 +1,116 @@
+import 'dart:convert';
+
+import 'package:hive/hive.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:rra_app/pages/map/tfl/tfl_bus_stop_service.dart';
+
+class TflBusStopCache {
+  TflBusStopCache._();
+
+  static const _boxName = 'tfl_bus_stop_cache_v1';
+  static const _staleAfter = Duration(hours: 12);
+  static const _maxEntries = 512;
+
+  static Future<void> init() async {
+    if (!Hive.isBoxOpen(_boxName)) {
+      await Hive.openBox(_boxName);
+    }
+  }
+
+  static Box? get _box {
+    try {
+      if (!Hive.isBoxOpen(_boxName)) return null;
+      return Hive.box(_boxName);
+    } catch (_) {
+      return null;
+    }
+  }
+
+  // rounds to ~1km grid cells so nearby pans reuse the same cache entry
+  static String keyFor(LatLng center) {
+    final lat = (center.latitude * 100).round() / 100;
+    final lon = (center.longitude * 100).round() / 100;
+    return '$lat,$lon';
+  }
+
+  static List<BusStop>? peek(String key) {
+    final box = _box;
+    if (box == null) return null;
+
+    final entry = box.get(key);
+    if (entry is! Map) return null;
+
+    final ts = entry['ts'];
+    if (ts is! int) return null;
+
+    final age = DateTime.now().millisecondsSinceEpoch - ts;
+    if (age > _staleAfter.inMilliseconds) return null;
+
+    final raw = entry['stops'];
+    if (raw is! List) return null;
+
+    try {
+      return _decodeStops(raw);
+    } catch (_) {
+      return null;
+    }
+  }
+
+  static Future<void> store(String key, List<BusStop> stops) async {
+    final box = _box;
+    if (box == null) return;
+
+    await box.put(key, {
+      'ts': DateTime.now().millisecondsSinceEpoch,
+      'stops': _encodeStops(stops),
+    });
+
+    await _pruneIfNeeded(box);
+  }
+
+
+  static List<Map<String, dynamic>> _encodeStops(List<BusStop> stops) {
+    return stops.map((s) => {
+      'id': s.id,
+      'name': s.name,
+      'lat': s.position.latitude,
+      'lon': s.position.longitude,
+      if (s.stopLetter != null) 'stopLetter': s.stopLetter,
+      if (s.towards != null) 'towards': s.towards,
+    }).toList();
+  }
+
+  static List<BusStop> _decodeStops(List raw) {
+    final result = <BusStop>[];
+    for (final item in raw) {
+      if (item is! Map) continue;
+      final lat = (item['lat'] as num?)?.toDouble();
+      final lon = (item['lon'] as num?)?.toDouble();
+      if (lat == null || lon == null) continue;
+      result.add(BusStop(
+        id: item['id'] as String? ?? '',
+        name: item['name'] as String? ?? '',
+        position: LatLng(lat, lon),
+        stopLetter: item['stopLetter'] as String?,
+        towards: item['towards'] as String?,
+      ));
+    }
+    return result;
+  }
+
+  static Future<void> _pruneIfNeeded(Box box) async {
+    final overflow = box.length - _maxEntries;
+    if (overflow <= 0) return;
+
+    final entries = box.keys.map((k) {
+      final v = box.get(k);
+      final ts = (v is Map && v['ts'] is int) ? v['ts'] as int : 0;
+      return MapEntry(k, ts);
+    }).toList()
+      ..sort((a, b) => a.value.compareTo(b.value));
+
+    for (var i = 0; i < overflow; i++) {
+      await box.delete(entries[i].key);
+    }
+  }
+}

lib/pages/map/tfl/tfl_bus_stop_service.dart

@@ -0,0 +1,102 @@
+import 'dart:convert';
+import 'dart:math' as math;
+
+import 'package:http/http.dart' as http;
+import 'package:latlong2/latlong.dart';
+
+class BusStop {
+  const BusStop({
+    required this.id,
+    required this.name,
+    required this.position,
+    this.stopLetter,
+    this.towards,
+  });
+
+  final String id;
+  final String name;
+  final LatLng position;
+
+  // the letter on the physical bus stop flag e.g. "A", "ZH"
+  final String? stopLetter;
+
+  // may be null for parent stops
+  final String? towards;
+}
+
+class TflBusStopService {
+  TflBusStopService();
+
+  static const _baseUrl = 'https://api.tfl.gov.uk';
+
+  // max radius the TfL API accepts is 1600m but in practice
+  // we clamp to 800 so we dont get swamped at low zoom
+  static const _maxRadius = 800;
+
+  Future<List<BusStop>> fetchNearby(LatLng center, {int radius = 600}) async {
+    final r = radius.clamp(0, _maxRadius);
+
+    final uri = Uri.parse(
+      '$_baseUrl/StopPoint'
+      '?stopTypes=NaptanPublicBusCoachTram'
+      '&lat=${center.latitude}'
+      '&lon=${center.longitude}'
+      '&radius=$r'
+      '&modes=bus',
+    );
+
+    final response = await http.get(uri, headers: {
+      'Accept': 'application/json',
+    });
+
+    if (response.statusCode != 200) {
+      throw Exception('TfL StopPoint request failed (${response.statusCode})');
+    }
+
+    final body = jsonDecode(response.body) as Map<String, dynamic>;
+    final stopPoints = body['stopPoints'];
+    if (stopPoints is! List) return const [];
+
+    final stops = <BusStop>[];
+    for (final raw in stopPoints) {
+      if (raw is! Map<String, dynamic>) continue;
+
+      final lat = (raw['lat'] as num?)?.toDouble();
+      final lon = (raw['lon'] as num?)?.toDouble();
+      if (lat == null || lon == null) continue;
+
+      final id = raw['id'] as String? ?? '';
+      final name = raw['commonName'] as String? ?? '';
+      final stopLetter = raw['stopLetter'] as String?;
+
+      String? towards;
+      final addInfo = raw['additionalProperties'];
+      if (addInfo is List) {
+        for (final prop in addInfo) {
+          if (prop is Map && prop['key'] == 'Towards') {
+            towards = prop['value'] as String?;
+            break;
+          }
+        }
+      }
+
+      stops.add(BusStop(
+        id: id,
+        name: name,
+        position: LatLng(lat, lon),
+        stopLetter: stopLetter,
+        towards: towards,
+      ));
+    }
+
+    return stops;
+  }
+
+  // rough haversine distance in metres, good enough for radius estimation
+  static double metersPerPixel(double lat, double zoom) {
+    const earthCircumference = 40075016.686;
+    final latRad = lat * math.pi / 180.0;
+    return (earthCircumference * math.cos(latRad)) /
+        (256 * math.pow(2, zoom));
+  }
+}

lib/pages/map/vector/mvt_parser.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:typed_data';
 import 'dart:ui';
 
@@ -316,7 +317,7 @@ class _PbfReader {
 
   String readString() {
     final bytes = readBytes();
-    return String.fromCharCodes(bytes);
+    return utf8.decode(bytes, allowMalformed: true);
   }
 
   double readFloat32() {

lib/pages/map/vector/tile_pyramid_cache.dart

@@ -28,7 +28,7 @@ class TilePyramidCache {
   TilePyramidCache._();
 
   static const int _maxEntries = 384;
-  static const int _maxApproxBytes = 256 * 1024 * 1024;
+  static const int _maxApproxBytes = 768 * 1024 * 1024;
 
   // Cap concurrent renders to avoid saturating the main isolate with
   // synchronous canvas recording. I/O (network/Hive) is still concurrent