651 lines
25 KiB
Dart
651 lines
25 KiB
Dart
import 'package:cloud_firestore/cloud_firestore.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../../../core/services/auth_service.dart';
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/// Página para o aluno entrar numa disciplina usando o código
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class JoinClassPage extends ConsumerStatefulWidget {
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const JoinClassPage({super.key});
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@override
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ConsumerState<JoinClassPage> createState() => _JoinClassPageState();
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}
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class _JoinClassPageState extends ConsumerState<JoinClassPage> {
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final _codeController = TextEditingController();
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final _nameController = TextEditingController();
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bool _isLoading = false;
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@override
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void dispose() {
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_codeController.dispose();
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_nameController.dispose();
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super.dispose();
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}
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Future<void> _joinClass() async {
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final code = _codeController.text.trim().toUpperCase();
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final customName = _nameController.text.trim();
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if (code.isEmpty) {
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_showError('Insere o código da disciplina');
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return;
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}
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if (customName.isEmpty) {
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_showError('Insere o nome da disciplina');
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return;
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}
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setState(() => _isLoading = true);
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try {
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final currentUser = AuthService.currentUser;
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if (currentUser == null) {
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setState(() => _isLoading = false);
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_showError('Erro: Utilizador não autenticado');
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return;
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}
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// Verificar role — apenas alunos podem entrar por código
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final userRole = await AuthService.getUserRole(currentUser.uid);
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if (userRole != 'student') {
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setState(() => _isLoading = false);
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_showError('Apenas alunos podem entrar em disciplinas por código.');
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return;
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}
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// Ler schoolClassId autorizado do aluno (definido no registo)
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final studentSchoolClassId = await AuthService.getStudentSchoolClassId(
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currentUser.uid,
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);
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// Procurar disciplina pelo código
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final classQuery = await FirebaseFirestore.instance
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.collection('classes')
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.where('code', isEqualTo: code)
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.limit(1)
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.get();
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if (classQuery.docs.isEmpty) {
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setState(() => _isLoading = false);
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_showError('Código de disciplina inválido');
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return;
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}
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final classDoc = classQuery.docs.first;
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final classId = classDoc.id;
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final classSchoolClassId = classDoc.data()['schoolClassId'] as String?;
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// Verificar se o aluno está autorizado a entrar nesta disciplina
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// O schoolClassId do aluno deve corresponder ao schoolClassId da disciplina
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if (studentSchoolClassId == null ||
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classSchoolClassId == null ||
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studentSchoolClassId != classSchoolClassId) {
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setState(() => _isLoading = false);
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_showError(
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'Não tens permissão para entrar nesta disciplina.\n'
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'O teu professor ainda não te adicionou a esta disciplina.',
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);
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return;
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}
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// Verificar se já está inscrito nesta disciplina
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final existingEnrollment = await FirebaseFirestore.instance
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.collection('enrollments')
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.where('classId', isEqualTo: classId)
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.where('studentId', isEqualTo: currentUser.uid)
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.limit(1)
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.get();
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if (existingEnrollment.docs.isNotEmpty) {
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setState(() => _isLoading = false);
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_showError('Já estás inscrito nesta disciplina');
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return;
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}
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// Criar documento de inscrição
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await FirebaseFirestore.instance.collection('enrollments').add({
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'classId': classId,
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'studentId': currentUser.uid,
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'studentName':
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currentUser.displayName ??
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currentUser.email?.split('@')[0] ??
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'Aluno',
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'customClassName': customName,
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'joinedAt': FieldValue.serverTimestamp(),
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});
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setState(() => _isLoading = false);
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// Mostrar sucesso
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if (mounted) {
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final colorScheme = Theme.of(context).colorScheme;
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Row(
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children: [
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Icon(Icons.check_circle, color: Colors.white),
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const SizedBox(width: 8),
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const Text('Entraste na disciplina com sucesso!'),
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],
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),
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backgroundColor: colorScheme.primary,
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duration: const Duration(seconds: 2),
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behavior: SnackBarBehavior.floating,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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);
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// Voltar para a home
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Navigator.of(context).pop();
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}
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} catch (e) {
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setState(() => _isLoading = false);
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_showError('Erro ao entrar na disciplina: $e');
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}
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}
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void _showError(String message) {
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final colorScheme = Theme.of(context).colorScheme;
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Row(
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children: [
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Icon(Icons.error_outline, color: Colors.white),
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const SizedBox(width: 8),
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Expanded(child: Text(message)),
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],
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),
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backgroundColor: colorScheme.error,
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duration: const Duration(seconds: 3),
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behavior: SnackBarBehavior.floating,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final colorScheme = theme.colorScheme;
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final isDark = theme.brightness == Brightness.dark;
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return Scaffold(
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body: Container(
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: isDark
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? [
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colorScheme.surfaceContainerHighest,
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colorScheme.surface,
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colorScheme.surfaceContainerLow,
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]
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: const [
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Color(0xFFD4E8E8),
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Color(0xFFE8D4C0),
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Color(0xFFD8E0E8),
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],
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),
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),
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child: SafeArea(
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top: false,
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child: Column(
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children: [
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// Custom AppBar
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Container(
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padding: const EdgeInsets.only(
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left: 16.0,
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right: 16.0,
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bottom: 20.0,
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top: 52.0,
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),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.center,
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children: [
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IconButton(
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icon: Icon(
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Icons.arrow_back,
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color: colorScheme.onSurface,
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),
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onPressed: () => Navigator.of(context).pop(),
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),
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Expanded(
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child: Text(
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'Adicionar uma Disciplina',
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style: TextStyle(
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color: colorScheme.onSurface,
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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),
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],
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),
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),
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// Body content
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Expanded(
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child: SingleChildScrollView(
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padding: const EdgeInsets.all(24.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const SizedBox(height: 20),
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// Header illustration card
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Center(
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child: Card(
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elevation: isDark ? 4 : 8,
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shadowColor: isDark
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? Colors.black.withOpacity(0.4)
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: Colors.black.withOpacity(0.1),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(20),
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),
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.all(32),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(20),
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: isDark
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? [
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colorScheme.primary.withOpacity(0.1),
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colorScheme.secondary.withOpacity(0.05),
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]
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: [
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colorScheme.primary.withOpacity(0.05),
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colorScheme.secondary.withOpacity(0.02),
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],
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),
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),
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child: Column(
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children: [
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Container(
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width: 80,
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height: 80,
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decoration: BoxDecoration(
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color: colorScheme.primary.withOpacity(0.1),
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borderRadius: BorderRadius.circular(20),
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border: Border.all(
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color: colorScheme.primary.withOpacity(
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0.2,
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),
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width: 2,
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),
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),
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child: Icon(
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Icons.group_add,
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color: colorScheme.primary,
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size: 40,
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),
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),
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const SizedBox(height: 24),
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Text(
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'Insere o código da disciplina',
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style: theme.textTheme.headlineSmall
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?.copyWith(
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color: colorScheme.onSurface,
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fontWeight: FontWeight.bold,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 8),
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Text(
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'O professor partilhou contigo um código de 6 caracteres.',
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style: theme.textTheme.bodyMedium?.copyWith(
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color: colorScheme.onSurfaceVariant,
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),
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textAlign: TextAlign.center,
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),
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],
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),
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),
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),
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),
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const SizedBox(height: 32),
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// Instructions card
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Card(
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elevation: isDark ? 2 : 4,
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shadowColor: isDark
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? Colors.black.withOpacity(0.3)
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: Colors.black.withOpacity(0.08),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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child: Padding(
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padding: const EdgeInsets.all(20),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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Icon(
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Icons.info_outline,
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color: colorScheme.primary,
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size: 20,
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),
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const SizedBox(width: 8),
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Text(
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'Como funciona',
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style: theme.textTheme.titleMedium
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?.copyWith(
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color: colorScheme.onSurface,
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fontWeight: FontWeight.w600,
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),
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),
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],
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),
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const SizedBox(height: 12),
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_buildInstructionItem(
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context,
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'1.',
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'Pedir ao professor o código da disciplina',
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colorScheme,
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),
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const SizedBox(height: 8),
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_buildInstructionItem(
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context,
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'2.',
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'Inserir o código no campo abaixo',
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colorScheme,
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),
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const SizedBox(height: 8),
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_buildInstructionItem(
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context,
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'3.',
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'Escrever o nome da disciplina',
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colorScheme,
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),
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const SizedBox(height: 8),
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_buildInstructionItem(
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context,
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'4.',
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'Clicar em "Adicionar uma Disciplina" para confirmar',
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colorScheme,
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),
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],
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),
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),
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),
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const SizedBox(height: 32),
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// Campo de código
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Container(
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decoration: BoxDecoration(
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color: theme.cardColor,
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borderRadius: BorderRadius.circular(16),
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border: Border.all(
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color: colorScheme.outline.withOpacity(0.3),
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width: 1,
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),
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boxShadow: [
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BoxShadow(
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color: isDark
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? Colors.black.withOpacity(0.2)
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: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: TextField(
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controller: _codeController,
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textCapitalization: TextCapitalization.characters,
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maxLength: 6,
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style: theme.textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.bold,
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letterSpacing: 8,
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color: colorScheme.onSurface,
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),
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textAlign: TextAlign.center,
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decoration: InputDecoration(
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hintText: 'XXXXXX',
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hintStyle: theme.textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.bold,
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letterSpacing: 8,
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color: colorScheme.onSurfaceVariant.withOpacity(
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0.5,
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),
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),
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border: InputBorder.none,
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contentPadding: const EdgeInsets.all(24),
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counterText: '',
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prefixIcon: Icon(
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Icons.vpn_key,
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color: colorScheme.primary,
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size: 24,
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),
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prefixIconConstraints: const BoxConstraints(
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minWidth: 48,
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minHeight: 48,
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),
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),
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),
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),
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const SizedBox(height: 24),
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// Campo de nome da disciplina
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Container(
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decoration: BoxDecoration(
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color: theme.cardColor,
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borderRadius: BorderRadius.circular(16),
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border: Border.all(
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color: colorScheme.outline.withOpacity(0.3),
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width: 1,
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),
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boxShadow: [
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BoxShadow(
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color: isDark
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? Colors.black.withOpacity(0.2)
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: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: TextField(
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controller: _nameController,
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style: theme.textTheme.bodyLarge?.copyWith(
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color: colorScheme.onSurface,
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),
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decoration: InputDecoration(
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hintText: 'Nome da disciplina',
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hintStyle: theme.textTheme.bodyLarge?.copyWith(
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color: colorScheme.onSurfaceVariant.withOpacity(
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0.5,
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),
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),
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border: InputBorder.none,
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contentPadding: const EdgeInsets.all(20),
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prefixIcon: Icon(
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Icons.edit,
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color: colorScheme.primary,
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size: 24,
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),
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prefixIconConstraints: const BoxConstraints(
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minWidth: 48,
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minHeight: 48,
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),
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),
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),
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),
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const SizedBox(height: 32),
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// Botão de entrar
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SizedBox(
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width: double.infinity,
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height: 56,
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child: ElevatedButton(
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onPressed: _isLoading ? null : _joinClass,
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style: ElevatedButton.styleFrom(
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backgroundColor: colorScheme.primary,
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foregroundColor: colorScheme.onPrimary,
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elevation: 2,
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shadowColor: colorScheme.primary.withOpacity(0.3),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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disabledBackgroundColor: colorScheme.primary
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.withOpacity(0.5),
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),
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child: _isLoading
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? SizedBox(
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width: 24,
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height: 24,
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child: CircularProgressIndicator(
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color: colorScheme.onPrimary,
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strokeWidth: 2,
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),
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)
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: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.login,
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size: 20,
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color: colorScheme.onPrimary,
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),
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const SizedBox(width: 8),
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Text(
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'Adicionar uma Disciplina',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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color: colorScheme.onPrimary,
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),
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),
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],
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),
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),
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),
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const SizedBox(height: 16),
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// Help text
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Center(
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child: TextButton.icon(
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onPressed: () {
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_showHelpDialog(context, colorScheme);
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},
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icon: Icon(
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Icons.help_outline,
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size: 16,
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color: colorScheme.primary,
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),
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label: Text(
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'Precisas de ajuda?',
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style: TextStyle(
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color: colorScheme.primary,
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fontSize: 14,
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fontWeight: FontWeight.w500,
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),
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),
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),
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),
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],
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),
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),
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),
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],
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),
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),
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),
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);
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}
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|
|
Widget _buildInstructionItem(
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BuildContext context,
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String number,
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String text,
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ColorScheme colorScheme,
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) {
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final theme = Theme.of(context);
|
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return Row(
|
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crossAxisAlignment: CrossAxisAlignment.start,
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|
children: [
|
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Container(
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width: 24,
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height: 24,
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decoration: BoxDecoration(
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color: colorScheme.primary,
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borderRadius: BorderRadius.circular(12),
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),
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child: Center(
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child: Text(
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number,
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style: const TextStyle(
|
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color: Colors.white,
|
|
fontSize: 12,
|
|
fontWeight: FontWeight.bold,
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),
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),
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),
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),
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const SizedBox(width: 12),
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Expanded(
|
|
child: Text(
|
|
text,
|
|
style: theme.textTheme.bodyMedium?.copyWith(
|
|
color: colorScheme.onSurfaceVariant,
|
|
),
|
|
),
|
|
),
|
|
],
|
|
);
|
|
}
|
|
|
|
void _showHelpDialog(BuildContext context, ColorScheme colorScheme) {
|
|
showDialog(
|
|
context: context,
|
|
builder: (context) => AlertDialog(
|
|
backgroundColor: Theme.of(context).cardColor,
|
|
title: Row(
|
|
children: [
|
|
Icon(Icons.help_outline, color: colorScheme.primary),
|
|
const SizedBox(width: 8),
|
|
Expanded(
|
|
child: Text(
|
|
'Ajuda - Código da Disciplina',
|
|
style: TextStyle(color: colorScheme.onSurface),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
content: SingleChildScrollView(
|
|
child: Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Text(
|
|
'O código da disciplina é um código único de 6 caracteres que o teu professor cria para cada disciplina.',
|
|
style: TextStyle(color: colorScheme.onSurfaceVariant),
|
|
),
|
|
const SizedBox(height: 12),
|
|
Text(
|
|
'Se não tens o código, contacta o teu professor.',
|
|
style: TextStyle(color: colorScheme.onSurfaceVariant),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
actions: [
|
|
TextButton(
|
|
onPressed: () => Navigator.of(context).pop(),
|
|
child: Text(
|
|
'Entendido',
|
|
style: TextStyle(color: colorScheme.primary),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|