gerenciamento e criação de turmas junto de correções na tela de professores

docs/CHANGELOG.md

@@ -6,6 +6,47 @@
 
 ## [Unreleased]
 
+### Added
+- **Class Creation Feature (ETAPA 1)** - Teachers can now create classes from the dashboard
+  - New "Criar Turma" button in Teacher Dashboard Quick Actions
+  - Simple dialog interface for entering class name
+  - Automatic generation of 6-character unique class codes (A-Z, 0-9)
+  - Firestore integration saving class data (name, teacherId, code, timestamp)
+  - Visual feedback with loading indicator and success/error messages
+
+- **Classes List Display (ETAPA 2)** - Teachers can now view their created classes
+  - New "As Minhas Turmas" section in Teacher Dashboard
+  - Real-time StreamBuilder to fetch classes from Firestore
+  - **CORREÇÃO**: O erro anterior foi tentar usar `GridView` horizontal para um layout que exige colunas fixas
+  - **SOLUÇÃO**: Usar `ListView.builder` com `scrollDirection: Axis.horizontal`
+  - Cada item do ListView é uma `Column` contendo 2 cards (índice * 2 e índice * 2 + 1)
+  - Cards mantêm exatamente o mesmo tamanho e estilo da lista vertical original
+  - Layout: Card 1, 3, 5... (top row) | Card 2, 4, 6... (bottom row)
+  - Scroll horizontal para visualizar todas as turmas
+  - Visual cards showing class name and access code
+  - Empty state message when no classes exist
+  - Loading state with CircularProgressIndicator
+
+### Fixed
+- **Unified Quick Action Cards Text Style**
+  - "Upload Conteúdo" and "Criar Quiz" cards now match "Criar Turma" text alignment
+  - All cards use `Column` with `crossAxisAlignment: CrossAxisAlignment.start` for text section
+  - Subtitle text supports 2 lines with `maxLines: 2` and `height: 1.2`
+  - Consistent typography: title fontSize 16, subtitle fontSize 12
+  - "Criar Quiz" subtitle changed to "Avaliações interativas"
+
+- **Pixel Overflow in Classes List Widget**
+  - **Causa**: Tentativa de usar `GridView` horizontal para layout de colunas fixas
+  - **Solução**: Substituir por `ListView.builder` com `scrollDirection: Axis.horizontal`
+  - Cada item do ListView é uma `Column` com 2 cards (índice * 2 e índice * 2 + 1)
+  - Cards mantêm tamanho original da lista vertical (sem constraints artificiais)
+  - Altura do SizedBox: 280 pixels (suficiente para 2 cards + spacing)
+
+- **Pixel Overflow in Teacher Dashboard Cards**
+  - Replaced fixed height constraints with flexible `BoxConstraints(minHeight: 135, maxHeight: 160)`
+  - Fixed overflow issues in "Upload Conteúdo" and "Criar Turma" cards
+  - Cards now properly adapt to different screen sizes and content
+
 ### Planned Features
 - Voice interaction capabilities
 - Advanced analytics dashboard

docs/PROJECT_PROGRESS.md

@@ -404,6 +404,43 @@ This document tracks the overall progress of the AI Study Assistant project deve
 
 ### **Last 24 Hours:**
 
+- ✅ **ETAPA 2: Classes List Display** - Teachers can now view their created classes
+  - New `TeacherClassesListWidget` component
+  - "As Minhas Turmas" section added to Teacher Dashboard
+  - Real-time Firestore stream with `StreamBuilder`
+  - Query: `.where('teacherId', isEqualTo: currentUser.uid).orderBy('createdAt', descending: true)`
+  - **CORREÇÃO**: O erro anterior foi tentar usar `GridView` horizontal para um layout que exige colunas fixas de 2 cards
+  - **SOLUÇÃO**: Usar `ListView.builder` com `scrollDirection: Axis.horizontal`
+  - Cada item do ListView é uma `Column` com 2 cards (índice * 2 e índice * 2 + 1)
+  - Cards mantêm exatamente o mesmo tamanho da lista vertical original
+  - Layout: Card 1, 3, 5... (top row) | Card 2, 4, 6... (bottom row)
+  - Scroll horizontal para visualizar todas as turmas
+  - Padding entre colunas: 12 pixels
+  - Altura do SizedBox: 280 pixels (suficiente para 2 cards + spacing)
+  - Empty state: "Ainda não criaste nenhuma turma."
+  - Loading state with `CircularProgressIndicator`
+  - Cards styled with white background, rounded corners, and subtle shadow
+
+- ✅ **Fixed Pixel Overflow Issues** - Teacher Dashboard cards
+  - Replaced fixed `height: 150` with `BoxConstraints(minHeight: 135, maxHeight: 160)`
+  - Fixed overflow in "Criar Turma" card
+  - Fixed overflow in "Upload Conteúdo" card
+  - Cards now adapt better to different screen sizes
+
+- ✅ **Unified Quick Action Cards Text Style**
+  - "Upload Conteúdo" and "Criar Quiz" cards now have same text alignment as "Criar Turma"
+  - All cards use `Column` with `crossAxisAlignment: CrossAxisAlignment.start` for text
+  - Subtitle text now supports 2 lines with `maxLines: 2` and proper line height (1.2)
+  - Consistent fontSize (16 for title, 12 for subtitle) across all cards
+  - "Criar Quiz" subtitle updated to "Avaliações interativas" for better description
+
+- ✅ **ETAPA 1: Class Creation Feature** - Teacher can now create classes
+  - Added "Criar Turma" button in Teacher Dashboard
+  - Dialog for entering class name
+  - Auto-generates 6-character random code (A-Z, 0-9)
+  - Saves to Firestore `classes` collection with name, teacherId, code, createdAt
+  - Success/error feedback via SnackBar
+
 - ✅ Fixed dashboard overflow issue in QuickAccessWidget
 
 - ✅ Implemented responsive layout with IntrinsicHeight and Flexible

lib/features/dashboard/presentation/pages/teacher_dashboard_page.dart

@@ -3,6 +3,7 @@ import 'package:go_router/go_router.dart';
 import '../../../../core/services/auth_service.dart';
 import '../widgets/teacher_hero_widget.dart';
 import '../widgets/teacher_quick_actions_widget.dart';
+import '../widgets/teacher_classes_list_widget.dart';
 import '../widgets/teacher_analytics_preview_widget.dart';
 
 class TeacherDashboardPage extends StatefulWidget {
@@ -141,6 +142,11 @@ class _TeacherDashboardPageState extends State<TeacherDashboardPage> {
 
                   const SizedBox(height: 24),
 
+                  // Classes List Section
+                  const TeacherClassesListWidget(),
+
+                  const SizedBox(height: 24),
+
                   // Analytics Preview Section
                   const TeacherAnalyticsPreviewWidget(),
 

lib/features/dashboard/presentation/widgets/teacher_classes_list_widget.dart

@@ -0,0 +1,155 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:flutter/material.dart';
+
+import '../../../../core/services/auth_service.dart';
+
+/// Widget para listar as turmas criadas pelo professor
+class TeacherClassesListWidget extends StatelessWidget {
+  const TeacherClassesListWidget({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final currentUser = AuthService.currentUser;
+
+    if (currentUser == null) {
+      return const SizedBox.shrink();
+    }
+
+    return StreamBuilder<QuerySnapshot>(
+      stream: FirebaseFirestore.instance
+          .collection('classes')
+          .where('teacherId', isEqualTo: currentUser.uid)
+          .orderBy('createdAt', descending: true)
+          .snapshots(),
+      builder: (context, snapshot) {
+        if (snapshot.connectionState == ConnectionState.waiting) {
+          return const Center(
+            child: Padding(
+              padding: EdgeInsets.all(16.0),
+              child: CircularProgressIndicator(
+                color: Color(0xFF82C9BD),
+              ),
+            ),
+          );
+        }
+
+        if (snapshot.hasError) {
+          return const SizedBox.shrink();
+        }
+
+        final classes = snapshot.data?.docs ?? [];
+
+        if (classes.isEmpty) {
+          return Padding(
+            padding: const EdgeInsets.symmetric(vertical: 16.0),
+            child: Text(
+              'Ainda não criaste nenhuma turma.',
+              style: TextStyle(
+                color: Colors.grey[600],
+                fontSize: 14,
+              ),
+            ),
+          );
+        }
+
+        return Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(
+              'As Minhas Turmas',
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(
+                    color: const Color(0xFF2D3748),
+                    fontWeight: FontWeight.bold,
+                  ),
+            ),
+            const SizedBox(height: 16),
+            SizedBox(
+              height: 330,
+              child: ListView.builder(
+                scrollDirection: Axis.horizontal,
+                padding: const EdgeInsets.only(right: 16),
+                itemCount: (classes.length + 1) ~/ 2,
+                itemBuilder: (context, index) {
+                  final firstIndex = index * 2;
+                  final secondIndex = firstIndex + 1;
+
+                  return Padding(
+                    padding: const EdgeInsets.only(right: 12),
+                    child: Column(
+                      children: [
+                        _buildClassCard(classes[firstIndex]),
+                        const SizedBox(height: 12),
+                        if (secondIndex < classes.length)
+                          _buildClassCard(classes[secondIndex]),
+                      ],
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  Widget _buildClassCard(DocumentSnapshot doc) {
+    final data = doc.data() as Map<String, dynamic>;
+    final className = data['name'] as String? ?? 'Sem nome';
+    final classCode = data['code'] as String? ?? '----';
+
+    return Container(
+      width: 200,
+      height: 150,
+      padding: const EdgeInsets.all(16),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.circular(16),
+        boxShadow: [
+          BoxShadow(
+            color: Colors.black.withOpacity(0.05),
+            blurRadius: 10,
+            offset: const Offset(0, 4),
+          ),
+        ],
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Container(
+            padding: const EdgeInsets.all(10),
+            decoration: BoxDecoration(
+              color: const Color(0xFF82C9BD).withOpacity(0.1),
+              borderRadius: BorderRadius.circular(10),
+            ),
+            child: const Icon(
+              Icons.school,
+              color: Color(0xFF82C9BD),
+              size: 24,
+            ),
+          ),
+          const SizedBox(height: 12),
+          Text(
+            className,
+            style: const TextStyle(
+              color: Color(0xFF2D3748),
+              fontSize: 16,
+              fontWeight: FontWeight.bold,
+            ),
+            maxLines: 1,
+            overflow: TextOverflow.ellipsis,
+          ),
+          const SizedBox(height: 4),
+          Text(
+            'Código: $classCode',
+            style: TextStyle(
+              color: Colors.grey[600],
+              fontSize: 13,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/features/dashboard/presentation/widgets/teacher_quick_actions_widget.dart

@@ -1,11 +1,23 @@
+import 'dart:math';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_animate/flutter_animate.dart';
 import 'package:go_router/go_router.dart';
 
+import '../../../../core/services/auth_service.dart';
+
 /// Quick access cards for teacher actions
-class TeacherQuickActionsWidget extends StatelessWidget {
+class TeacherQuickActionsWidget extends StatefulWidget {
   const TeacherQuickActionsWidget({super.key});
 
+  @override
+  State<TeacherQuickActionsWidget> createState() => _TeacherQuickActionsWidgetState();
+}
+
+class _TeacherQuickActionsWidgetState extends State<TeacherQuickActionsWidget> {
+  bool _isCreatingClass = false;
+
   @override
   Widget build(BuildContext context) {
     return Column(
@@ -25,7 +37,10 @@ class TeacherQuickActionsWidget extends StatelessWidget {
         Row(
           children: [
             // Upload Content Card (Primary)
-            Expanded(flex: 3, child: _buildUploadContentCard(context)),
+            Expanded(flex: 2, child: _buildUploadContentCard(context)),
+            const SizedBox(width: 16),
+            // Create Class Card
+            Expanded(flex: 2, child: _buildCreateClassCard(context)),
             const SizedBox(width: 16),
             // Create Quiz Card (Secondary)
             Expanded(flex: 2, child: _buildCreateQuizCard(context)),
@@ -55,7 +70,7 @@ class TeacherQuickActionsWidget extends StatelessWidget {
 
   Widget _buildUploadContentCard(BuildContext context) {
     return Container(
-      height: 150,
+      constraints: const BoxConstraints(minHeight: 135, maxHeight: 160),
       decoration: BoxDecoration(
         gradient: const LinearGradient(
           begin: Alignment.topLeft,
@@ -77,15 +92,14 @@ class TeacherQuickActionsWidget extends StatelessWidget {
           borderRadius: BorderRadius.circular(16),
           onTap: () => context.go('/teacher/upload'),
           child: Padding(
-            padding: const EdgeInsets.all(20),
+            padding: const EdgeInsets.all(14),
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
-              mainAxisAlignment: MainAxisAlignment.spaceBetween,
               children: [
                 Row(
                   children: [
                     Container(
-                      padding: const EdgeInsets.all(7),
+                      padding: const EdgeInsets.all(8),
                       decoration: BoxDecoration(
                         color: Colors.white.withOpacity(0.2),
                         borderRadius: BorderRadius.circular(10),
@@ -93,30 +107,31 @@ class TeacherQuickActionsWidget extends StatelessWidget {
                       child: const Icon(
                         Icons.upload_file,
                         color: Colors.white,
-                        size: 24,
+                        size: 22,
                       ),
                     ),
                     const Spacer(),
                     Container(
                       padding: const EdgeInsets.symmetric(
-                        horizontal: 10,
+                        horizontal: 8,
-                        vertical: 4,
+                        vertical: 3,
                       ),
                       decoration: BoxDecoration(
                         color: const Color(0xFFF68D2D),
-                        borderRadius: BorderRadius.circular(12),
+                        borderRadius: BorderRadius.circular(10),
                       ),
                       child: const Text(
                         'NOVO',
                         style: TextStyle(
                           color: Colors.white,
-                          fontSize: 10,
+                          fontSize: 9,
                           fontWeight: FontWeight.bold,
                         ),
                       ),
                     ),
                   ],
                 ),
+                const Spacer(),
                 const Column(
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
@@ -124,13 +139,14 @@ class TeacherQuickActionsWidget extends StatelessWidget {
                       'Upload Conteúdo',
                       style: TextStyle(
                         color: Colors.white,
-                        fontSize: 18,
+                        fontSize: 16,
                         fontWeight: FontWeight.bold,
                       ),
                     ),
+                    SizedBox(height: 4),
                     Text(
                       'PDFs, textos, imagens',
-                      maxLines: 1,
+                      maxLines: 2,
                       overflow: TextOverflow.ellipsis,
                       style: TextStyle(
                         color: Colors.white,
@@ -192,10 +208,10 @@ class TeacherQuickActionsWidget extends StatelessWidget {
                     size: 24,
                   ),
                 ),
-                const Column(
+                Column(
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
-                    Text(
+                    const Text(
                       'Criar Quiz',
                       style: TextStyle(
                         color: Color(0xFF2D3748),
@@ -203,13 +219,13 @@ class TeacherQuickActionsWidget extends StatelessWidget {
                         fontWeight: FontWeight.bold,
                       ),
                     ),
-                    SizedBox(height: 4),
+                    const SizedBox(height: 4),
                     Text(
-                      'Avaliações',
+                      'Avaliações interativas',
                       maxLines: 2,
                       overflow: TextOverflow.ellipsis,
                       style: TextStyle(
-                        color: Color(0xFF718096),
+                        color: const Color(0xFF718096),
                         fontSize: 12,
                         height: 1.2,
                       ),
@@ -373,4 +389,238 @@ class TeacherQuickActionsWidget extends StatelessWidget {
     )
     .then(delay: const Duration(milliseconds: 400));
   }
+
+  Widget _buildCreateClassCard(BuildContext context) {
+    return Container(
+      constraints: const BoxConstraints(minHeight: 135, maxHeight: 160),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(color: const Color(0xFFE2E8F0), width: 1),
+        boxShadow: [
+          BoxShadow(
+            color: Colors.black.withOpacity(0.05),
+            blurRadius: 10,
+            offset: const Offset(0, 4),
+          ),
+        ],
+      ),
+      child: Material(
+        color: Colors.transparent,
+        child: InkWell(
+          borderRadius: BorderRadius.circular(16),
+          onTap: _isCreatingClass ? null : () => _showCreateClassDialog(context),
+          child: Padding(
+            padding: const EdgeInsets.all(14),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Container(
+                  padding: const EdgeInsets.all(10),
+                  decoration: BoxDecoration(
+                    color: const Color(0xFF82C9BD).withOpacity(0.1),
+                    borderRadius: BorderRadius.circular(10),
+                  ),
+                  child: _isCreatingClass
+                      ? const SizedBox(
+                          width: 24,
+                          height: 24,
+                          child: CircularProgressIndicator(
+                            strokeWidth: 2,
+                            color: Color(0xFF82C9BD),
+                          ),
+                        )
+                      : const Icon(
+                          Icons.school,
+                          color: Color(0xFF82C9BD),
+                          size: 24,
+                        ),
+                ),
+                Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      'Criar Turma',
+                      style: TextStyle(
+                        color: const Color(0xFF2D3748),
+                        fontSize: 16,
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+                    const SizedBox(height: 4),
+                    Text(
+                      'Gerar código de acesso',
+                      maxLines: 2,
+                      overflow: TextOverflow.ellipsis,
+                      style: TextStyle(
+                        color: const Color(0xFF718096),
+                        fontSize: 12,
+                        height: 1.2,
+                      ),
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    )
+    .animate()
+    .scale(
+      duration: const Duration(milliseconds: 600),
+      curve: Curves.elasticOut,
+    )
+    .then(delay: const Duration(milliseconds: 150));
+  }
+
+  void _showCreateClassDialog(BuildContext context) {
+    final TextEditingController nameController = TextEditingController();
+
+    showDialog(
+      context: context,
+      builder: (BuildContext dialogContext) {
+        return AlertDialog(
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(16),
+          ),
+          title: const Text(
+            'Criar Nova Turma',
+            style: TextStyle(
+              color: Color(0xFF2D3748),
+              fontWeight: FontWeight.bold,
+            ),
+          ),
+          content: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              const Text(
+                'Digite o nome da turma:',
+                style: TextStyle(
+                  color: Color(0xFF718096),
+                  fontSize: 14,
+                ),
+              ),
+              const SizedBox(height: 12),
+              TextField(
+                controller: nameController,
+                decoration: InputDecoration(
+                  hintText: 'Ex: Matemática 9º Ano',
+                  filled: true,
+                  fillColor: const Color(0xFFF7FAFC),
+                  border: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(12),
+                    borderSide: BorderSide.none,
+                  ),
+                  enabledBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(12),
+                    borderSide: BorderSide.none,
+                  ),
+                  focusedBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(12),
+                    borderSide: const BorderSide(
+                      color: Color(0xFF82C9BD),
+                      width: 2,
+                    ),
+                  ),
+                ),
+              ),
+            ],
+          ),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.of(dialogContext).pop(),
+              child: const Text(
+                'Cancelar',
+                style: TextStyle(color: Color(0xFF718096)),
+              ),
+            ),
+            ElevatedButton(
+              onPressed: () {
+                final className = nameController.text.trim();
+                if (className.isNotEmpty) {
+                  Navigator.of(dialogContext).pop();
+                  _createClass(className);
+                }
+              },
+              style: ElevatedButton.styleFrom(
+                backgroundColor: const Color(0xFF82C9BD),
+                foregroundColor: Colors.white,
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+              ),
+              child: const Text('Criar'),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  String _generateClassCode() {
+    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+    final random = Random();
+    return String.fromCharCodes(
+      Iterable.generate(
+        6,
+        (_) => chars.codeUnitAt(random.nextInt(chars.length)),
+      ),
+    );
+  }
+
+  Future<void> _createClass(String className) async {
+    setState(() {
+      _isCreatingClass = true;
+    });
+
+    try {
+      final currentUser = AuthService.currentUser;
+      if (currentUser == null) {
+        throw Exception('Utilizador não autenticado');
+      }
+
+      final classCode = _generateClassCode();
+      final firestore = FirebaseFirestore.instance;
+
+      await firestore.collection('classes').add({
+        'name': className,
+        'teacherId': currentUser.uid,
+        'code': classCode,
+        'createdAt': FieldValue.serverTimestamp(),
+      });
+
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Turma "$className" criada com sucesso! Código: $classCode'),
+            backgroundColor: const Color(0xFF82C9BD),
+            behavior: SnackBarBehavior.floating,
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+          ),
+        );
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Erro ao criar turma: $e'),
+            backgroundColor: Colors.red,
+            behavior: SnackBarBehavior.floating,
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+          ),
+        );
+      }
+    } finally {
+      setState(() {
+        _isCreatingClass = false;
+      });
+    }
+  }
 }