Sicherhaven/Eventify-frontend
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fix: reverse geocode stored coordinates to place names

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When lat,lng coordinates are stored in SharedPreferences from
a previous session, reverse geocode them to a human-readable
location name (e.g. "Whitefield, Bengaluru") instead of showing
raw numbers like "10.57376,76.01188".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Sicherhaven
2026-03-21 13:30:05 +05:30
parent bc6fde1b90
commit 1e90f5fc4b
1 changed files with 28 additions and 2 deletions
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30
lib/screens/home_screen.dart
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@@ -15,6 +15,7 @@ import 'contribute_screen.dart';
import 'learn_more_screen.dart';
import 'search_screen.dart';
import '../core/app_decoration.dart';
import 'package:geocoding/geocoding.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:provider/provider.dart';
import '../features/gamification/providers/gamification_provider.dart';
@@ -83,9 +84,16 @@ class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateM
_username = prefs.getString('display_name') ?? prefs.getString('username') ?? '';
final storedLocation = prefs.getString('location') ?? 'Whitefield, Bengaluru';
// Fix legacy lat,lng strings saved before the reverse-geocoding fix
if (RegExp(r'^-?\d+\.\d+,-?\d+\.\d+$').hasMatch(storedLocation)) {
final coordMatch = RegExp(r'^(-?\d+\.?\d*),\s*(-?\d+\.?\d*)$').firstMatch(storedLocation);
if (coordMatch != null) {
_location = 'Current Location';
prefs.setString('location', _location);
setState(() {});
// Reverse geocode in background to get actual place name
_reverseGeocodeAndSave(
double.parse(coordMatch.group(1)!),
double.parse(coordMatch.group(2)!),
prefs,
);
} else {
_location = storedLocation;
}
@@ -116,6 +124,24 @@ class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateM
}
}
Future<void> _reverseGeocodeAndSave(double lat, double lng, SharedPreferences prefs) async {
try {
final placemarks = await placemarkFromCoordinates(lat, lng);
if (placemarks.isNotEmpty) {
final p = placemarks.first;
final parts = <String>[];
if ((p.subLocality ?? '').isNotEmpty) parts.add(p.subLocality!);
if ((p.locality ?? '').isNotEmpty) parts.add(p.locality!);
if ((p.subAdministrativeArea ?? '').isNotEmpty) parts.add(p.subAdministrativeArea!);
final label = parts.isNotEmpty ? parts.join(', ') : 'Current Location';
await prefs.setString('location', label);
if (mounted) setState(() => _location = label);
return;
}
} catch (_) {}
await prefs.setString('location', 'Current Location');
}
Future<List<EventTypeModel>> _events_service_getEventTypesSafe() async {
try {
return await _eventsService.getEventTypes();