A more accurate geofencing

lib/screens/workforce/workforce_screen.dart

@@ -407,16 +407,20 @@ class _ScheduleTile extends ConsumerWidget {
         ),
       );
 
-      final isInside = geofence.hasPolygon
-          ? geofence.containsPolygon(position.latitude, position.longitude)
-          : geofence.hasCircle &&
-                Geolocator.distanceBetween(
-                      position.latitude,
-                      position.longitude,
-                      geofence.lat!,
-                      geofence.lng!,
-                    ) <=
-                    geofence.radiusMeters!;
+      if (!geofence.hasPolygon) {
+        if (!context.mounted) return;
+        await _showAlert(
+          context,
+          title: 'Geofence missing',
+          message: 'Geofence polygon is not configured.',
+        );
+        return;
+      }
+
+      final isInside = geofence.containsPolygon(
+        position.latitude,
+        position.longitude,
+      );
 
       if (!isInside) {
         if (!context.mounted) return;

test/geofence_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tasq/models/app_settings.dart';
+
+void main() {
+  // Polygon taken from user's KML (CRMC)
+  final polygonJson = [
+    {"lat": 7.2025231, "lng": 124.2339774},
+    {"lat": 7.2018791, "lng": 124.2334463},
+    {"lat": 7.2013362, "lng": 124.2332049},
+    {"lat": 7.2011393, "lng": 124.2332907},
+    {"lat": 7.2009531, "lng": 124.2334195},
+    {"lat": 7.200655, "lng": 124.2339344},
+    {"lat": 7.2000749, "lng": 124.2348465},
+    {"lat": 7.199501, "lng": 124.2357645},
+    {"lat": 7.1990597, "lng": 124.2364595},
+    {"lat": 7.1986557, "lng": 124.2371331},
+    {"lat": 7.1992252, "lng": 124.237168},
+    {"lat": 7.199494, "lng": 124.2372713},
+    {"lat": 7.1997415, "lng": 124.2374604},
+    {"lat": 7.1999383, "lng": 124.2377071},
+    {"lat": 7.2001938, "lng": 124.2380934},
+    {"lat": 7.2011411, "lng": 124.2364357},
+    {"lat": 7.2025231, "lng": 124.2339774},
+  ];
+
+  test('GeofenceConfig.fromJson parses polygon and containsPolygon works', () {
+    final cfg = GeofenceConfig.fromJson({"polygon": polygonJson});
+    expect(cfg.hasPolygon, isTrue);
+
+    // Point clearly inside the CRMC polygon
+    final insideLat = 7.2009;
+    final insideLng = 124.2360;
+    expect(cfg.containsPolygon(insideLat, insideLng), isTrue);
+
+    // Point clearly outside (north of polygon)
+    final outsideLat = 7.2060;
+    final outsideLng = 124.2360;
+    expect(cfg.containsPolygon(outsideLat, outsideLng), isFalse);
+  });
+}