39 lines
1.1 KiB
Dart
39 lines
1.1 KiB
Dart
import 'dart:convert';
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import 'package:http/http.dart' as http;
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import 'package:intl/intl.dart';
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class OpenExchangeService {
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OpenExchangeService({required this.httpClient, required this.apiKey});
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final http.Client httpClient;
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final String apiKey;
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Future<double> fetchUsdToSekRate({required DateTime estDate}) async {
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if (apiKey == 'REPLACE_WITH_YOUR_OPENEXCHANGE_API_KEY') {
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throw StateError('OpenExchange API key is not configured.');
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}
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final date = DateFormat('yyyy-MM-dd').format(estDate);
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final uri = Uri.https(
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'openexchangerates.org',
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'/api/historical/$date.json',
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<String, String>{'app_id': apiKey, 'symbols': 'SEK'},
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);
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final response = await httpClient.get(uri);
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if (response.statusCode != 200) {
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throw StateError('OpenExchange request failed (${response.statusCode}).');
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}
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final json = jsonDecode(response.body) as Map<String, dynamic>;
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final rates = json['rates'] as Map<String, dynamic>?;
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final sek = rates?['SEK'];
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if (sek == null) {
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throw StateError('SEK rate was missing in API response.');
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}
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return (sek as num).toDouble();
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}
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}
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