74 lines
2.3 KiB
Dart
74 lines
2.3 KiB
Dart
import 'package:flutter/foundation.dart';
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import '../models/verification.dart';
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import '../services/verification.dart';
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class VerificationProvider extends ChangeNotifier {
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VerificationProvider(this.service);
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final VerificationService service;
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VerificationState _state = const VerificationState(VerificationStatus.idle);
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VerificationState get state => _state;
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bool _disposed = false;
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int _generation = 0;
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Future<void> send({required String email, required String locale}) => _run(
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() => service.send(email: email.trim(), locale: locale),
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VerificationStatus.sending,
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VerificationStatus.sent,
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);
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Future<void> confirm(String token) => _run(
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() => service.confirm(token: token),
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VerificationStatus.checking,
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VerificationStatus.verified,
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);
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Future<void> _run(
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Future<VerificationResult> Function() operation,
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VerificationStatus loading,
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VerificationStatus success,
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) async {
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if (_disposed || _state.isLoading) return;
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final generation = ++_generation;
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_state = VerificationState(loading);
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notifyListeners();
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if (_disposed || generation != _generation) return;
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try {
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final result = await operation();
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if (_disposed || generation != _generation) return;
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_state = VerificationState(success, isSimulated: result.isSimulated);
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} catch (error) {
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if (_disposed || generation != _generation) return;
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final code = error is VerificationException
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? error.code
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: VerificationError.internal;
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// Send failures must not be presented as confirmation-token failures.
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_state = VerificationState(
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loading == VerificationStatus.sending
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? VerificationStatus.error
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: switch (code) {
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VerificationError.expired => VerificationStatus.expired,
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VerificationError.invalid => VerificationStatus.invalid,
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VerificationError.internal => VerificationStatus.error,
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VerificationError.needsAssistance => VerificationStatus.error,
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},
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error: code,
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);
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}
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notifyListeners();
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}
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void reset() {
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if (_disposed) return;
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++_generation;
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_state = const VerificationState(VerificationStatus.idle);
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notifyListeners();
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}
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@override
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void dispose() {
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_disposed = true;
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++_generation;
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super.dispose();
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}
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}
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