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fix: country selection in remittance flow (#157)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,62 +1,54 @@ | ||
| import 'dart:async'; | ||
| import 'dart:convert'; | ||
|
|
||
| import 'package:didpay/config/config.dart'; | ||
| import 'package:didpay/features/remittance/countries.dart'; | ||
| import 'package:didpay/features/storage/storage_service.dart'; | ||
| import 'package:hooks_riverpod/hooks_riverpod.dart'; | ||
| import 'package:http/http.dart' as http; | ||
| import 'package:shared_preferences/shared_preferences.dart'; | ||
|
|
||
| final countriesProvider = | ||
| AsyncNotifierProvider<CountriesAsyncNotifier, List<Country>>( | ||
| CountriesAsyncNotifier.new, | ||
| StateNotifierProvider<CountriesNotifier, List<Country>>( | ||
| (ref) => throw UnimplementedError(), | ||
| ); | ||
|
|
||
| class CountriesAsyncNotifier extends AsyncNotifier<List<Country>> { | ||
| final _cacheKey = 'didpay:countries_cache'; | ||
| class CountriesNotifier extends StateNotifier<List<Country>> { | ||
| static const String prefsKey = 'countries'; | ||
| final SharedPreferences prefs; | ||
|
|
||
| @override | ||
| FutureOr<List<Country>> build() => _loadFromCache(); | ||
| CountriesNotifier(this.prefs, super.state); | ||
|
|
||
| void addCountry(Country newCountry) { | ||
| final currentCountries = state.value ?? []; | ||
| final updatedCountries = [...currentCountries, newCountry]; | ||
| state = AsyncData(updatedCountries); | ||
| } | ||
|
|
||
| Future<void> reload() async { | ||
| final countries = await _loadFromCache(); | ||
| // Show loading indicator if cache is empty | ||
| state = countries.isEmpty ? const AsyncLoading() : AsyncData(countries); | ||
| Future<Country> add(String code, String name) async { | ||
| final country = Country(code: code, name: name); | ||
|
|
||
| final response = await http.get(Uri.parse(Config.pfisJsonUrl)); | ||
| if (response.statusCode != 200) { | ||
| state = AsyncError('Failed to load countries', StackTrace.current); | ||
| return; | ||
| } | ||
| state = [...state, country]; | ||
| await _save(); | ||
| return country; | ||
| } | ||
|
|
||
| await ref | ||
| .read(sharedPreferencesProvider) | ||
| .setString(_cacheKey, response.body); | ||
| Future<void> remove(Country country) async { | ||
| state = state.where((elem) => elem.code != country.code).toList(); | ||
| await _save(); | ||
| } | ||
|
|
||
| state = AsyncData( | ||
| List<Country>.from( | ||
| (json.decode(response.body) as List) | ||
| .map((item) => Country.fromJson(item as Map<String, dynamic>)), | ||
| ), | ||
| ); | ||
| Future<void> _save() async { | ||
| final toSave = state.map((e) => e.code).toList(); | ||
| await prefs.setStringList('countries', toSave); | ||
| } | ||
|
|
||
| Future<List<Country>> _loadFromCache() async { | ||
| final cachedData = ref.read(sharedPreferencesProvider).getString(_cacheKey); | ||
| if (cachedData == null) { | ||
| Future<List<Country>> loadSavedCountryCodes() async { | ||
| final saved = prefs.getStringList(prefsKey); | ||
|
|
||
| if (saved == null) { | ||
| return []; | ||
| } | ||
| final countries = <Country>[]; | ||
| for (final country in saved) { | ||
| try { | ||
| countries.add(Country.fromJson(jsonDecode(country))); | ||
| } on Exception catch (e) { | ||
| throw Exception('Failed to load saved country: $e'); | ||
| } | ||
| } | ||
|
|
||
| return List<Country>.from( | ||
| (json.decode(cachedData) as List).map( | ||
| (item) => Country.fromJson(item as Map<String, dynamic>), | ||
| ), | ||
| ); | ||
| return countries; | ||
| } | ||
| } |
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