age_range_signals 0.5.1

Flutter plugin for age verification supporting Google Play Age Signals API (Android) and Apple's Age Range (DeclaredAgeRange) API (iOS 26+).

example/lib/main.dart

import 'dart:async';
import 'dart:io';

import 'package:age_range_signals/age_range_signals.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Age Range Signals Demo',
      theme: ThemeData(primarySwatch: Colors.blue, useMaterial3: true),
      home: const AgeSignalsDemo(),
    );
  }
}

class AgeSignalsDemo extends StatefulWidget {
  const AgeSignalsDemo({super.key});

  @override
  State<AgeSignalsDemo> createState() => _AgeSignalsDemoState();
}

class _AgeSignalsDemoState extends State<AgeSignalsDemo> {
  AgeSignalsResult? _result;
  String? _error;
  bool _isLoading = false;
  bool _isInitialized = false;
  final bool _isIos = Platform.isIOS;
  String _currentScenario = 'Default (Supervised 13-15)';

  final List<int> _ageGates = [13, 16, 18];

  @override
  void initState() {
    super.initState();
    _initializePlugin();
  }

  Future<void> _initializePlugin({AgeSignalsMockData? mockData}) async {
    try {
      await AgeRangeSignals.instance.initialize(
        ageGates: _ageGates,
        // useMockData: Android only - uses Google's FakeAgeSignalsManager
        // On iOS, this is ignored and the real DeclaredAgeRange API is always used
        useMockData: true, // Set to true for testing, false for production
        mockData: mockData, // Android only - custom mock data for testing
      );
      setState(() {
        _isInitialized = true;
      });
    } catch (e) {
      setState(() {
        _error = 'Initialization failed: $e';
      });
    }
  }

  Future<void> _reinitializeWithScenario(
    String scenarioName,
    AgeSignalsMockData mockData,
  ) async {
    setState(() {
      _currentScenario = scenarioName;
      _result = null;
      _error = null;
    });
    await _initializePlugin(mockData: mockData);
  }

  Future<void> _checkAgeSignals() async {
    setState(() {
      _isLoading = true;
      _error = null;
      _result = null;
    });

    try {
      final result = await AgeRangeSignals.instance.checkAgeSignals();
      setState(() {
        _result = result;
        _isLoading = false;
      });
    } on ApiNotAvailableException catch (e) {
      setState(() {
        _error = 'API Not Available: ${e.message}';
        _isLoading = false;
      });
    } on UnsupportedPlatformException catch (e) {
      setState(() {
        _error = 'Unsupported Platform: ${e.message}';
        _isLoading = false;
      });
    } on NotInitializedException catch (e) {
      setState(() {
        _error = 'Not Initialized: ${e.message}';
        _isLoading = false;
      });
    } on MissingEntitlementException catch (e) {
      setState(() {
        _error = 'Missing Entitlement: ${e.message}';
        _isLoading = false;
      });
    } on AgeSignalsException catch (e) {
      setState(() {
        _error = 'Error: ${e.message}';
        _isLoading = false;
      });
    } catch (e) {
      setState(() {
        _error = 'Unexpected error: $e';
        _isLoading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Age Range Signals'), elevation: 2),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            _buildInfoCard(),
            if (_isIos) ...[const SizedBox(height: 12), _buildIosWarningCard()],
            if (!_isIos) ...[const SizedBox(height: 12), _buildScenarioCard()],
            const SizedBox(height: 16),
            _buildCheckButton(),
            const SizedBox(height: 24),
            if (_isLoading) _buildLoadingIndicator(),
            if (_error != null) _buildErrorCard(),
            if (_result != null) _buildResultCard(),
          ],
        ),
      ),
    );
  }

  Widget _buildInfoCard() {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              'Platform: ${Platform.isAndroid ? 'Android' : 'iOS'}',
              style: Theme.of(context).textTheme.titleMedium,
            ),
            const SizedBox(height: 8),
            if (Platform.isIOS) ...[
              Text(
                'Age Gates: ${_ageGates.join(", ")}',
                style: Theme.of(context).textTheme.bodyMedium,
              ),
              const SizedBox(height: 4),
              Text(
                'Status: ${_isInitialized ? "Initialized" : "Not initialized"}',
                style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                  color: _isInitialized ? Colors.green : Colors.orange,
                ),
              ),
            ],
            const SizedBox(height: 8),
            const Divider(),
            const SizedBox(height: 8),
            Text(
              Platform.isAndroid
                  ? 'Note: This example uses mock data (useMockData: true) for testing. You can test different scenarios using the chips below.'
                  : 'Note: DeclaredAgeRange requires iOS 26.0 or later. On older iOS versions, you will receive an UnsupportedPlatformException.',
              style: Theme.of(context).textTheme.bodySmall?.copyWith(
                fontStyle: FontStyle.italic,
                color: Colors.grey[600],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildScenarioCard() {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              'Test Scenarios',
              style: Theme.of(
                context,
              ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 8),
            Text(
              'Current: $_currentScenario',
              style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                color: Colors.blue[700],
                fontWeight: FontWeight.w600,
              ),
            ),
            const SizedBox(height: 12),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              children: [
                _buildScenarioChip(
                  'Default (Supervised 13-15)',
                  AgeSignalsMockData(
                    status: AgeSignalsStatus.supervised,
                    ageLower: 13,
                    ageUpper: 15,
                    installId: 'test_install_id_12345',
                  ),
                ),
                _buildScenarioChip(
                  'Supervised 16-17',
                  AgeSignalsMockData(
                    status: AgeSignalsStatus.supervised,
                    ageLower: 16,
                    ageUpper: 17,
                    installId: 'test_install_id_12345',
                  ),
                ),
                _buildScenarioChip(
                  'Verified (18+)',
                  const AgeSignalsMockData(status: AgeSignalsStatus.verified),
                ),
                _buildScenarioChip(
                  'Approval Pending',
                  AgeSignalsMockData(
                    status: AgeSignalsStatus.supervisedApprovalPending,
                    ageLower: 13,
                    ageUpper: 15,
                    installId: 'test_install_id_12345',
                  ),
                ),
                _buildScenarioChip(
                  'Approval Denied',
                  AgeSignalsMockData(
                    status: AgeSignalsStatus.supervisedApprovalDenied,
                    ageLower: 13,
                    ageUpper: 15,
                    installId: 'test_install_id_12345',
                  ),
                ),
                _buildScenarioChip(
                  'Declared Age',
                  const AgeSignalsMockData(
                    status: AgeSignalsStatus.declared,
                    ageLower: 13,
                    ageUpper: 15,
                  ),
                ),
                _buildScenarioChip(
                  'Unknown',
                  const AgeSignalsMockData(status: AgeSignalsStatus.unknown),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildScenarioChip(String label, AgeSignalsMockData mockData) {
    return ActionChip(
      label: Text(label),
      onPressed: () => _reinitializeWithScenario(label, mockData),
    );
  }

  Widget _buildCheckButton() {
    return FilledButton.icon(
      onPressed: _isLoading || !_isInitialized || _isIos
          ? null
          : _checkAgeSignals,
      icon: const Icon(Icons.verified_user),
      label: Text(
        _isIos ? 'Unavailable on iOS in example app' : 'Check Age Signals',
      ),
      style: FilledButton.styleFrom(
        padding: const EdgeInsets.symmetric(vertical: 16),
      ),
    );
  }

  Widget _buildIosWarningCard() {
    return Card(
      color: Colors.orange[50],
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Icon(Icons.info_outline, color: Colors.orange[700]),
            const SizedBox(width: 12),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    'iOS entitlement not available in example',
                    style: Theme.of(context).textTheme.titleMedium?.copyWith(
                      color: Colors.orange[800],
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                  const SizedBox(height: 6),
                  Text(
                    'The sample app does not include the com.apple.developer.declared-age-range entitlement or a signed identifier, so the DeclaredAgeRange API cannot run here. Build your own app with the entitlement to test on iOS.',
                    style: Theme.of(context).textTheme.bodyMedium,
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildLoadingIndicator() {
    return const Center(
      child: Padding(
        padding: EdgeInsets.all(24),
        child: CircularProgressIndicator(),
      ),
    );
  }

  Widget _buildErrorCard() {
    return Card(
      color: Colors.red[50],
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                Icon(Icons.error_outline, color: Colors.red[700]),
                const SizedBox(width: 8),
                Text(
                  'Error',
                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
                    color: Colors.red[700],
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ],
            ),
            const SizedBox(height: 12),
            Text(_error ?? '', style: TextStyle(color: Colors.red[900])),
          ],
        ),
      ),
    );
  }

  Widget _buildResultCard() {
    return Card(
      color: Colors.green[50],
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                Icon(Icons.check_circle_outline, color: Colors.green[700]),
                const SizedBox(width: 8),
                Text(
                  'Result',
                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
                    color: Colors.green[700],
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ],
            ),
            const SizedBox(height: 16),
            _buildResultRow('Status', _getStatusText(_result!.status)),
            if (_result!.ageLower != null)
              _buildResultRow('Age Lower Bound', _result!.ageLower.toString()),
            if (_result!.ageUpper != null)
              _buildResultRow('Age Upper Bound', _result!.ageUpper.toString()),
            if (_result!.source != null)
              _buildResultRow('Source', _getSourceText(_result!.source!)),
            if (_result!.installId != null)
              _buildResultRow('Install ID', _result!.installId!),
          ],
        ),
      ),
    );
  }

  Widget _buildResultRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 120,
            child: Text(
              '$label:',
              style: const TextStyle(fontWeight: FontWeight.w600),
            ),
          ),
          Expanded(child: Text(value)),
        ],
      ),
    );
  }

  String _getStatusText(AgeSignalsStatus status) {
    switch (status) {
      case AgeSignalsStatus.verified:
        return 'Verified (User is above age threshold)';
      case AgeSignalsStatus.supervised:
        return 'Supervised (User may be under age threshold)';
      case AgeSignalsStatus.supervisedApprovalPending:
        return 'Supervised (Awaiting guardian approval)';
      case AgeSignalsStatus.supervisedApprovalDenied:
        return 'Supervised (Guardian denied approval)';
      case AgeSignalsStatus.declared:
        return 'Declared (User has declared their age)';
      case AgeSignalsStatus.declined:
        return 'Declined (User chose not to share)';
      case AgeSignalsStatus.unknown:
        return 'Unknown (Age information not available)';
    }
  }

  String _getSourceText(AgeDeclarationSource source) {
    switch (source) {
      case AgeDeclarationSource.selfDeclared:
        return 'Self Declared';
      case AgeDeclarationSource.guardianDeclared:
        return 'Guardian Declared';
    }
  }
}