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QUIZZES FEITOS POHA

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This commit is contained in:
240403
2026-05-16 20:19:23 +01:00
parent 728368b040
commit 3463b1f6cc
4 changed files with 749 additions and 39 deletions
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7
lib/core/routing/app_router.dart
View File

@@ -139,6 +139,13 @@ class AppRouter {
name: 'aiTutor',
builder: (context, state) => const TutorChatPageSimple(),
),
// Quiz List Route (independent — student access)
GoRoute(
path: quizList,
name: 'quizList',
builder: (context, state) => const QuizListPage(),
),
],
// Let splash screen handle all navigation logic

16
lib/core/services/rag_ai_service.dart
View File

@@ -480,6 +480,22 @@ Usas formatação clara e organizada.''';
}
}
/// Gerar quiz a partir de um prompt com contexto PDF embutido — sem histórico de conversa
static Future<String> generateQuiz(String prompt) async {
final messages = <Map<String, String>>[
{
'role': 'system',
'content': 'És um assistente educativo especializado em criar quizzes pedagógicos. '
'Cria sempre perguntas claras, baseadas exclusivamente no contexto fornecido.',
},
{
'role': 'user',
'content': prompt,
},
];
return await _callOllamaAPIWithMessages(messages);
}
/// Test the service with a simple query
static Future<String> testService() async {
try {

10
lib/features/dashboard/presentation/widgets/quick_access_widget.dart
View File

@@ -180,15 +180,7 @@ class QuickAccessWidget extends StatelessWidget {
color: Colors.transparent,
child: InkWell(
borderRadius: BorderRadius.circular(16),
onTap: () {
print('DEBUG: AI Tutor card clicked!');
try {
context.go('/ai-tutor');
print('DEBUG: Navigation to AI Tutor successful');
} catch (e) {
print('DEBUG: Navigation error: $e');
}
},
onTap: () => context.go('/quiz'),
child: Padding(
padding: const EdgeInsets.all(14),
child: Column(

749
lib/features/quiz/presentation/pages/quiz_list_page.dart
View File

@@ -1,51 +1,746 @@
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import '../../../../core/services/materials_rag_service.dart';
import '../../../../core/services/rag_ai_service.dart';
import '../../../../core/utils/logger.dart';
class QuizListPage extends StatelessWidget {
class QuizListPage extends StatefulWidget {
const QuizListPage({super.key});
@override
State<QuizListPage> createState() => _QuizListPageState();
}
class _QuizListPageState extends State<QuizListPage>
with SingleTickerProviderStateMixin {
late TabController _tabController;
List<Map<String, String>> _materials = [];
List<Map<String, dynamic>> _history = [];
bool _loadingMaterials = true;
bool _loadingHistory = true;
// generating state
String? _generatingForId;
@override
void initState() {
super.initState();
_tabController = TabController(length: 2, vsync: this);
_loadMaterials();
_loadHistory();
}
@override
void dispose() {
_tabController.dispose();
super.dispose();
}
Future<void> _loadMaterials() async {
final mats = await MaterialsRAGService.getAvailableMaterialsForStudent();
if (mounted) setState(() { _materials = mats; _loadingMaterials = false; });
}
Future<void> _loadHistory() async {
try {
final uid = FirebaseAuth.instance.currentUser?.uid;
if (uid == null) { if (mounted) setState(() => _loadingHistory = false); return; }
final snap = await FirebaseFirestore.instance
.collection('quizHistory')
.doc(uid)
.collection('quizzes')
.orderBy('createdAt', descending: true)
.limit(30)
.get();
final list = snap.docs.map((d) => {'id': d.id, ...d.data()}).toList();
if (mounted) setState(() { _history = list; _loadingHistory = false; });
} catch (e) {
Logger.error('Error loading quiz history: $e');
if (mounted) setState(() => _loadingHistory = false);
}
}
Future<void> _generateQuiz(Map<String, String> material) async {
setState(() => _generatingForId = material['id']);
try {
final matId = material['id']!;
final matName = material['name'] ?? 'Material';
// Buscar contexto do PDF
final context = await MaterialsRAGService.getRelevantChunks(
userQuery: 'conteúdo geral resumo tópicos principais',
selectedMaterialIds: [matId],
);
if (context.isEmpty) {
if (mounted) _showSnack('Não foi possível aceder ao conteúdo do PDF.');
return;
}
// Gerar quiz via Ollama em formato JSON estruturado
final prompt =
'Usa APENAS o seguinte contexto para criar um quiz. Não uses conhecimento externo.\n\n'
'$context\n\n'
'Cria um quiz com 5 perguntas de escolha múltipla sobre o conteúdo acima.\n'
'Responde SOMENTE com JSON válido, sem texto adicional, sem markdown, sem blocos de código.\n'
'Formato exacto:\n'
'[{"q":"Pergunta aqui","opts":["A) opção","B) opção","C) opção","D) opção"],"ans":0,"exp":"Explicação breve da resposta correcta"},...]\n'
'ans é o índice (0-3) da opção correcta.';
final raw = await RAGAIService.generateQuiz(prompt);
final questions = _parseQuizJson(raw);
if (questions.isEmpty) {
if (mounted) _showSnack('Não foi possível gerar o quiz. Tenta novamente.');
return;
}
// Guardar no histórico (guardar JSON raw para poder rever)
final uid = FirebaseAuth.instance.currentUser?.uid;
if (uid != null) {
await FirebaseFirestore.instance
.collection('quizHistory')
.doc(uid)
.collection('quizzes')
.add({
'materialId': matId,
'materialName': matName,
'quizJson': raw,
'createdAt': FieldValue.serverTimestamp(),
});
await _loadHistory();
}
if (mounted) _showInteractiveQuiz(matName, questions);
} catch (e) {
Logger.error('Error generating quiz: $e');
if (mounted) _showSnack('Erro ao gerar quiz. Tenta novamente.');
} finally {
if (mounted) setState(() => _generatingForId = null);
}
}
/// Parse do JSON gerado pelo modelo — tolerante a erros
List<_QuizQuestion> _parseQuizJson(String raw) {
try {
// Extrair o primeiro array JSON encontrado na string
final start = raw.indexOf('[');
final end = raw.lastIndexOf(']');
if (start == -1 || end == -1 || end <= start) return [];
final jsonStr = raw.substring(start, end + 1);
final decoded = _jsonDecode(jsonStr);
if (decoded is! List) return [];
return decoded.map<_QuizQuestion?>((e) {
if (e is! Map) return null;
final q = e['q'] as String?;
final opts = (e['opts'] as List?)?.cast<String>();
final ans = e['ans'] as int?;
final exp = e['exp'] as String? ?? '';
if (q == null || opts == null || ans == null) return null;
if (opts.length < 2 || ans < 0 || ans >= opts.length) return null;
return _QuizQuestion(question: q, options: opts, correctIndex: ans, explanation: exp);
}).whereType<_QuizQuestion>().toList();
} catch (e) {
Logger.error('Quiz JSON parse error: $e');
return [];
}
}
dynamic _jsonDecode(String s) => jsonDecode(s);
void _showInteractiveQuiz(String title, List<_QuizQuestion> questions) {
showModalBottomSheet(
context: context,
isScrollControlled: true,
backgroundColor: Colors.transparent,
isDismissible: false,
builder: (_) => _InteractiveQuizSheet(title: title, questions: questions),
);
}
void _showQuizFromHistory(String title, String rawJson) {
final questions = _parseQuizJson(rawJson);
if (questions.isEmpty) {
_showSnack('Não foi possível carregar este quiz.');
return;
}
_showInteractiveQuiz(title, questions);
}
void _showSnack(String msg) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text(msg), behavior: SnackBarBehavior.floating),
);
}
@override
Widget build(BuildContext context) {
final cs = Theme.of(context).colorScheme;
return PopScope(
canPop: false,
onPopInvoked: (didPop) {
onPopInvokedWithResult: (didPop, _) {
if (didPop) return;
// Navigate back to dashboard instead of exiting app
context.go('/student-dashboard');
},
child: Scaffold(
backgroundColor: Theme.of(context).colorScheme.background,
backgroundColor: cs.surface,
appBar: AppBar(
title: const Text('Quizzes'),
backgroundColor: Theme.of(context).colorScheme.surface,
foregroundColor: Theme.of(context).colorScheme.onSurface,
title: const Text('Quiz'),
backgroundColor: cs.surface,
foregroundColor: cs.onSurface,
elevation: 0,
leading: IconButton(
icon: const Icon(Icons.arrow_back),
onPressed: () => context.go('/student-dashboard'),
),
body: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [
Theme.of(context).colorScheme.background,
Theme.of(context).colorScheme.primary.withOpacity(0.1),
Theme.of(context).colorScheme.secondary.withOpacity(0.05),
Theme.of(context).colorScheme.background,
bottom: TabBar(
controller: _tabController,
labelColor: cs.primary,
unselectedLabelColor: cs.onSurfaceVariant,
indicatorColor: cs.primary,
tabs: const [
Tab(text: 'Gerar Quiz'),
Tab(text: 'Histórico'),
],
),
),
child: Center(
child: Text(
'Quiz List - Coming Soon',
style: TextStyle(
fontSize: 24,
fontWeight: FontWeight.bold,
color: Theme.of(context).colorScheme.onSurface,
),
),
),
body: TabBarView(
controller: _tabController,
children: [
_buildMaterialsTab(cs),
_buildHistoryTab(cs),
],
),
),
);
}
Widget _buildMaterialsTab(ColorScheme cs) {
if (_loadingMaterials) {
return const Center(child: CircularProgressIndicator());
}
if (_materials.isEmpty) {
return Center(
child: Padding(
padding: const EdgeInsets.all(32),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Icon(Icons.folder_open, size: 64, color: cs.onSurfaceVariant.withOpacity(0.4)),
const SizedBox(height: 16),
Text(
'Nenhum material disponível.',
textAlign: TextAlign.center,
style: TextStyle(color: cs.onSurfaceVariant, fontSize: 16),
),
const SizedBox(height: 8),
Text(
'Inscreve-te numa turma para aceder aos PDFs do professor.',
textAlign: TextAlign.center,
style: TextStyle(color: cs.onSurfaceVariant.withOpacity(0.7), fontSize: 13),
),
],
),
),
);
}
return ListView.separated(
padding: const EdgeInsets.all(16),
itemCount: _materials.length,
separatorBuilder: (_, __) => const SizedBox(height: 12),
itemBuilder: (context, i) {
final mat = _materials[i];
final isGenerating = _generatingForId == mat['id'];
final name = mat['name'] ?? 'Material';
return Container(
decoration: BoxDecoration(
color: cs.surface,
borderRadius: BorderRadius.circular(16),
border: Border.all(color: cs.outline.withOpacity(0.15)),
boxShadow: [
BoxShadow(
color: cs.shadow.withOpacity(0.05),
blurRadius: 8,
offset: const Offset(0, 2),
),
],
),
child: ListTile(
contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
leading: Container(
width: 44,
height: 44,
decoration: BoxDecoration(
color: cs.secondary.withOpacity(0.12),
borderRadius: BorderRadius.circular(10),
),
child: Icon(Icons.picture_as_pdf, color: cs.secondary, size: 22),
),
title: Text(
name.replaceAll('.pdf', '').replaceAll('_', ' '),
maxLines: 2,
overflow: TextOverflow.ellipsis,
style: TextStyle(
fontWeight: FontWeight.w600,
fontSize: 14,
color: cs.onSurface,
),
),
subtitle: Text(
'Toca para gerar um quiz',
style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant),
),
trailing: isGenerating
? SizedBox(
width: 24,
height: 24,
child: CircularProgressIndicator(
strokeWidth: 2.5,
color: cs.primary,
),
)
: Icon(Icons.play_circle_outline, color: cs.primary, size: 28),
onTap: isGenerating ? null : () => _generateQuiz(mat),
),
);
},
);
}
Widget _buildHistoryTab(ColorScheme cs) {
if (_loadingHistory) {
return const Center(child: CircularProgressIndicator());
}
if (_history.isEmpty) {
return Center(
child: Padding(
padding: const EdgeInsets.all(32),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Icon(Icons.history, size: 64, color: cs.onSurfaceVariant.withOpacity(0.4)),
const SizedBox(height: 16),
Text(
'Ainda não geraste nenhum quiz.',
textAlign: TextAlign.center,
style: TextStyle(color: cs.onSurfaceVariant, fontSize: 16),
),
],
),
),
);
}
return ListView.separated(
padding: const EdgeInsets.all(16),
itemCount: _history.length,
separatorBuilder: (_, __) => const SizedBox(height: 12),
itemBuilder: (context, i) {
final item = _history[i];
final matName = (item['materialName'] as String? ?? 'Material')
.replaceAll('.pdf', '')
.replaceAll('_', ' ');
final ts = item['createdAt'];
String dateStr = '';
if (ts is Timestamp) {
final dt = ts.toDate();
dateStr = '${dt.day.toString().padLeft(2, '0')}/${dt.month.toString().padLeft(2, '0')}/${dt.year} ${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
}
return Container(
decoration: BoxDecoration(
color: cs.surface,
borderRadius: BorderRadius.circular(16),
border: Border.all(color: cs.outline.withOpacity(0.15)),
boxShadow: [
BoxShadow(
color: cs.shadow.withOpacity(0.05),
blurRadius: 8,
offset: const Offset(0, 2),
),
],
),
child: ListTile(
contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
leading: Container(
width: 44,
height: 44,
decoration: BoxDecoration(
color: cs.primary.withOpacity(0.1),
borderRadius: BorderRadius.circular(10),
),
child: Icon(Icons.quiz, color: cs.primary, size: 22),
),
title: Text(
matName,
maxLines: 2,
overflow: TextOverflow.ellipsis,
style: TextStyle(
fontWeight: FontWeight.w600,
fontSize: 14,
color: cs.onSurface,
),
),
subtitle: dateStr.isNotEmpty
? Text(dateStr, style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant))
: null,
trailing: Icon(Icons.chevron_right, color: cs.onSurfaceVariant),
onTap: () => _showQuizFromHistory(matName, item['quizJson'] as String? ?? item['quizText'] as String? ?? ''),
),
);
},
);
}
}
// ─── Modelo de dados ────────────────────────────────────────────────────────
class _QuizQuestion {
final String question;
final List<String> options;
final int correctIndex;
final String explanation;
const _QuizQuestion({
required this.question,
required this.options,
required this.correctIndex,
required this.explanation,
});
}
// ─── Sheet interativa ────────────────────────────────────────────────────────
class _InteractiveQuizSheet extends StatefulWidget {
final String title;
final List<_QuizQuestion> questions;
const _InteractiveQuizSheet({required this.title, required this.questions});
@override
State<_InteractiveQuizSheet> createState() => _InteractiveQuizSheetState();
}
class _InteractiveQuizSheetState extends State<_InteractiveQuizSheet> {
// índice da pergunta actual (-1 = resultados finais)
int _current = 0;
// respostas escolhidas: -1 = sem resposta
late List<int> _chosen;
bool _submitted = false;
@override
void initState() {
super.initState();
_chosen = List.filled(widget.questions.length, -1);
}
void _selectOption(int idx) {
if (_submitted) return;
setState(() => _chosen[_current] = idx);
}
void _next() {
if (_current < widget.questions.length - 1) {
setState(() { _current++; });
} else {
setState(() => _submitted = true);
}
}
void _prev() {
if (_current > 0) setState(() { _current--; });
}
int get _score => List.generate(widget.questions.length, (i) {
return _chosen[i] == widget.questions[i].correctIndex ? 1 : 0;
}).fold(0, (a, b) => a + b);
@override
Widget build(BuildContext context) {
final cs = Theme.of(context).colorScheme;
return DraggableScrollableSheet(
initialChildSize: 0.93,
minChildSize: 0.6,
maxChildSize: 0.97,
builder: (_, scrollController) => Container(
decoration: BoxDecoration(
color: cs.surface,
borderRadius: const BorderRadius.vertical(top: Radius.circular(20)),
),
child: Column(
children: [
_buildHandle(cs),
_buildHeader(cs),
const Divider(height: 1),
Expanded(
child: _submitted
? _buildResults(cs, scrollController)
: _buildQuestion(cs, scrollController),
),
],
),
),
);
}
Widget _buildHandle(ColorScheme cs) => Container(
margin: const EdgeInsets.only(top: 12, bottom: 4),
width: 40,
height: 4,
decoration: BoxDecoration(
color: cs.outline.withOpacity(0.3),
borderRadius: BorderRadius.circular(2),
),
);
Widget _buildHeader(ColorScheme cs) => Padding(
padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
child: Row(
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
widget.title,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 15, fontWeight: FontWeight.bold, color: cs.onSurface),
),
if (!_submitted)
Text(
'Pergunta ${_current + 1} de ${widget.questions.length}',
style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant),
),
],
),
),
IconButton(
icon: Icon(Icons.close, color: cs.onSurfaceVariant),
onPressed: () => Navigator.of(context).pop(),
),
],
),
);
Widget _buildQuestion(ColorScheme cs, ScrollController sc) {
final q = widget.questions[_current];
final chosen = _chosen[_current];
return ListView(
controller: sc,
padding: const EdgeInsets.fromLTRB(20, 16, 20, 24),
children: [
// Barra de progresso
ClipRRect(
borderRadius: BorderRadius.circular(4),
child: LinearProgressIndicator(
value: (_current + 1) / widget.questions.length,
minHeight: 6,
backgroundColor: cs.surfaceVariant,
valueColor: AlwaysStoppedAnimation(cs.primary),
),
),
const SizedBox(height: 20),
// Pergunta
Text(
q.question,
style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: cs.onSurface, height: 1.4),
),
const SizedBox(height: 20),
// Opções
...List.generate(q.options.length, (i) {
final isSelected = chosen == i;
return Padding(
padding: const EdgeInsets.only(bottom: 12),
child: InkWell(
borderRadius: BorderRadius.circular(12),
onTap: () => _selectOption(i),
child: AnimatedContainer(
duration: const Duration(milliseconds: 150),
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
decoration: BoxDecoration(
color: isSelected ? cs.primary.withOpacity(0.12) : cs.surfaceVariant.withOpacity(0.4),
borderRadius: BorderRadius.circular(12),
border: Border.all(
color: isSelected ? cs.primary : cs.outline.withOpacity(0.2),
width: isSelected ? 2 : 1,
),
),
child: Row(
children: [
Expanded(
child: Text(
q.options[i],
style: TextStyle(
fontSize: 14,
color: isSelected ? cs.primary : cs.onSurface,
fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
),
),
),
if (isSelected) Icon(Icons.check_circle, color: cs.primary, size: 20),
],
),
),
),
);
}),
const SizedBox(height: 8),
// Botões navegação
Row(
children: [
if (_current > 0)
Expanded(
child: OutlinedButton(
onPressed: _prev,
style: OutlinedButton.styleFrom(
padding: const EdgeInsets.symmetric(vertical: 14),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
),
child: const Text('Anterior'),
),
),
if (_current > 0) const SizedBox(width: 12),
Expanded(
child: ElevatedButton(
onPressed: chosen == -1 ? null : _next,
style: ElevatedButton.styleFrom(
backgroundColor: cs.primary,
foregroundColor: cs.onPrimary,
padding: const EdgeInsets.symmetric(vertical: 14),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
),
child: Text(_current < widget.questions.length - 1 ? 'Próxima' : 'Submeter'),
),
),
],
),
],
);
}
Widget _buildResults(ColorScheme cs, ScrollController sc) {
final total = widget.questions.length;
final score = _score;
final pct = (score / total * 100).round();
final Color scoreColor = pct >= 80
? const Color(0xFF10B981)
: pct >= 50
? const Color(0xFFF59E0B)
: const Color(0xFFEF4444);
return ListView(
controller: sc,
padding: const EdgeInsets.fromLTRB(20, 20, 20, 32),
children: [
// Resultado global
Container(
padding: const EdgeInsets.all(20),
decoration: BoxDecoration(
color: scoreColor.withOpacity(0.08),
borderRadius: BorderRadius.circular(16),
border: Border.all(color: scoreColor.withOpacity(0.3)),
),
child: Column(
children: [
Text(
'$score / $total',
style: TextStyle(fontSize: 40, fontWeight: FontWeight.bold, color: scoreColor),
),
const SizedBox(height: 4),
Text(
'$pct% de respostas correctas',
style: TextStyle(fontSize: 14, color: scoreColor),
),
],
),
),
const SizedBox(height: 24),
Text(
'Revisão',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: cs.onSurface),
),
const SizedBox(height: 12),
// Revisão pergunta a pergunta
...List.generate(total, (i) {
final q = widget.questions[i];
final chosen = _chosen[i];
final isCorrect = chosen == q.correctIndex;
final revColor = isCorrect ? const Color(0xFF10B981) : const Color(0xFFEF4444);
return Container(
margin: const EdgeInsets.only(bottom: 16),
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: revColor.withOpacity(0.06),
borderRadius: BorderRadius.circular(14),
border: Border.all(color: revColor.withOpacity(0.25)),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Icon(isCorrect ? Icons.check_circle : Icons.cancel, color: revColor, size: 18),
const SizedBox(width: 8),
Expanded(
child: Text(
'Pergunta ${i + 1}',
style: TextStyle(fontSize: 12, fontWeight: FontWeight.w600, color: revColor),
),
),
],
),
const SizedBox(height: 8),
Text(q.question, style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600, color: cs.onSurface)),
const SizedBox(height: 8),
if (chosen >= 0 && chosen < q.options.length && !isCorrect)
Text(
'A tua resposta: ${q.options[chosen]}',
style: const TextStyle(fontSize: 13, color: Color(0xFFEF4444)),
),
Text(
'Resposta correcta: ${q.options[q.correctIndex]}',
style: TextStyle(fontSize: 13, color: isCorrect ? const Color(0xFF10B981) : cs.onSurface, fontWeight: FontWeight.w500),
),
if (q.explanation.isNotEmpty) ...[
const SizedBox(height: 8),
Container(
padding: const EdgeInsets.all(10),
decoration: BoxDecoration(
color: cs.surfaceVariant.withOpacity(0.5),
borderRadius: BorderRadius.circular(8),
),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Icon(Icons.info_outline, size: 14, color: cs.onSurfaceVariant),
const SizedBox(width: 6),
Expanded(
child: Text(
q.explanation,
style: TextStyle(fontSize: 12, color: cs.onSurfaceVariant, height: 1.4),
),
),
],
),
),
],
],
),
);
}),
// Botão fechar
ElevatedButton(
onPressed: () => Navigator.of(context).pop(),
style: ElevatedButton.styleFrom(
backgroundColor: cs.primary,
foregroundColor: cs.onPrimary,
padding: const EdgeInsets.symmetric(vertical: 14),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
),
child: const Text('Fechar'),
),
],
);
}
}