feat: add temporal student gestion

app.py

@@ -14,6 +14,7 @@ from routes.grading import bp as grading_bp
 from routes.config import bp as config_bp
 from routes.domains import bp as domains_bp
 from routes.classes import bp as classes_bp
+# from routes.student_movements import bp as student_movements_bp  # Désactivé car page supprimée
 
 def create_app(config_name=None):
     if config_name is None:
@@ -45,6 +46,7 @@ def create_app(config_name=None):
     app.register_blueprint(config_bp)
     app.register_blueprint(domains_bp)
     app.register_blueprint(classes_bp)
+    # app.register_blueprint(student_movements_bp)  # Désactivé car page supprimée
 
     # Register CLI commands
     app.cli.add_command(init_db)
@@ -84,10 +86,23 @@ def create_app(config_name=None):
     @app.route('/students')
     def students():
         try:
-            # Optimisation: utiliser joinedload pour éviter les requêtes N+1
+            # Utilisation du repository temporel pour récupérer tous les élèves avec leur classe actuelle
-            student_repo = StudentRepository()
+            from repositories.temporal_student_repository import TemporalStudentRepository
-            students = student_repo.find_all_with_class_ordered()
+            from models import Student
-            return render_template('students.html', students=students)
+            
+            temporal_repo = TemporalStudentRepository()
+            all_students = Student.query.order_by(Student.last_name, Student.first_name).all()
+            
+            # Enrichir chaque élève avec sa classe actuelle
+            students_with_classes = []
+            for student in all_students:
+                current_class = student.get_current_class()
+                students_with_classes.append({
+                    'student': student,
+                    'current_class': current_class
+                })
+            
+            return render_template('students.html', students_with_classes=students_with_classes)
         except Exception as e:
             app.logger.error(f'Erreur lors du chargement des étudiants: {e}')
             return render_template('error.html', error="Erreur lors du chargement des étudiants"), 500

commands.py

@@ -1,6 +1,7 @@
 import click
 from flask.cli import with_appcontext
-from models import db, ClassGroup, Student, Assessment, Exercise, GradingElement, Domain, CouncilAppreciation
+from models import db, ClassGroup, Student, StudentEnrollment, Assessment, Exercise, GradingElement, Domain, CouncilAppreciation
+from datetime import date, datetime
 
 @click.command()
 @click.option('--mode', default='minimal', type=click.Choice(['minimal', 'midyear', 'demo']), 
@@ -34,7 +35,7 @@ def init_minimal_data():
     click.echo("Database initialized for start of school year - ready to create classes and students!")
 
 def init_midyear_data():
-    """Initialize database with realistic mid-year data."""
+    """Initialize database with realistic mid-year data including temporal enrollments."""
     from app_config import config_manager
     from models import Grade
     import random
@@ -44,6 +45,12 @@ def init_midyear_data():
     config_manager.set('context.school_name', 'Collège Jean Moulin')
     config_manager.save()
     
+    # Dates importantes pour les inscriptions temporelles
+    school_year_start = date(2024, 9, 1)   # Début d'année scolaire
+    first_term_end = date(2024, 12, 20)    # Fin du 1er trimestre
+    second_term_start = date(2025, 1, 8)   # Début du 2e trimestre
+    today = date(2025, 2, 15)              # Date actuelle (milieu 2e trimestre)
+    
     # Create 5 classes with realistic sizes
     classes_data = [
         ("6ème A", "Classe de 6ème A", 28),
@@ -71,22 +78,23 @@ def init_midyear_data():
     ]
     
     classes = []
-    students_by_class = []
+    all_students = []
     
     # Global sets to ensure uniqueness across all classes
     used_names = set()
     used_emails = set()
     
-    # Create classes and students
+    # Create classes first
     for class_name, description, nb_students in classes_data:
         classe = ClassGroup(name=class_name, description=description, year="2024-2025")
         db.session.add(classe)
-        db.session.commit()
         classes.append(classe)
     
-        # Create students for this class
+    db.session.commit()
-        class_students = []
+    
-        for i in range(nb_students):
+    # Create students without class assignment (temporal model)
+    total_students = sum(nb for _, _, nb in classes_data)
+    for i in range(total_students):
         # Generate unique name combinations and emails
         while True:
             first_name = random.choice(first_names)
@@ -109,13 +117,83 @@ def init_midyear_data():
         student = Student(
             last_name=last_name,
             first_name=first_name,
-                email=email,
+            email=email
-                class_group_id=classe.id
+            # Pas de class_group_id dans le nouveau modèle temporel
         )
         db.session.add(student)
-            class_students.append(student)
+        all_students.append(student)
+    
+    db.session.commit()
+    
+    # Create temporal enrollments with realistic movements
+    student_index = 0
+    movements_log = []
+    
+    for i, (class_name, description, nb_students) in enumerate(classes_data):
+        classe = classes[i]
+        
+        # Répartir les élèves pour cette classe
+        class_students = all_students[student_index:student_index + nb_students]
+        student_index += nb_students
+        
+        for student in class_students:
+            # 90% des élèves : inscrits depuis le début d'année, toujours présents
+            if random.random() < 0.90:
+                enrollment = StudentEnrollment(
+                    student_id=student.id,
+                    class_group_id=classe.id,
+                    enrollment_date=school_year_start,
+                    departure_date=None,  # Toujours inscrit
+                    enrollment_reason="Inscription début d'année",
+                )
+                db.session.add(enrollment)
+            
+            # 7% des élèves : ont quitté pendant le 1er trimestre
+            elif random.random() < 0.97:  # 7% des 10% restants
+                departure_date = date(2024, random.randint(10, 11), random.randint(1, 28))
+                enrollment = StudentEnrollment(
+                    student_id=student.id,
+                    class_group_id=classe.id,
+                    enrollment_date=school_year_start,
+                    departure_date=departure_date,
+                    enrollment_reason="Inscription début d'année",
+                    departure_reason="Déménagement"
+                )
+                db.session.add(enrollment)
+                movements_log.append(f"Élève {student.full_name} : départ de {classe.name} le {departure_date}")
+                
+                # Créer un nouvel élève pour remplacer (arrivé en janvier)
+                new_student = Student(
+                    last_name=random.choice(last_names),
+                    first_name=random.choice(first_names),
+                    email=f"nouveau.{random.randint(1000,9999)}@college.edu"
+                )
+                db.session.add(new_student)
+                db.session.commit()  # Pour avoir l'ID
+                
+                new_enrollment = StudentEnrollment(
+                    student_id=new_student.id,
+                    class_group_id=classe.id,
+                    enrollment_date=second_term_start,
+                    departure_date=None,
+                    enrollment_reason="Nouvel élève - arrivée en cours d'année"
+                )
+                db.session.add(new_enrollment)
+                movements_log.append(f"Élève {new_student.full_name} : arrivée en {classe.name} le {second_term_start}")
+            
+            # 3% des élèves : arrivés en cours d'année (janvier)
+            else:
+                arrival_date = date(2025, 1, random.randint(8, 31))
+                enrollment = StudentEnrollment(
+                    student_id=student.id,
+                    class_group_id=classe.id,
+                    enrollment_date=arrival_date,
+                    departure_date=None,
+                    enrollment_reason="Arrivée en cours d'année"
+                )
+                db.session.add(enrollment)
+                movements_log.append(f"Élève {student.full_name} : arrivée en {classe.name} le {arrival_date}")
     
-        students_by_class.append(class_students)
     db.session.commit()
     
     # Get domains for realistic grading elements
@@ -290,15 +368,20 @@ def init_midyear_data():
         }
     ]
     
-    # Create assessments for each class
+    # Create assessments for each class with temporal logic
-    for i, classe in enumerate(classes):
+    for classe in classes:
-        class_students = students_by_class[i]
-        
         for assessment_template in assessments_templates:
-            # Create assessment
+            # Create assessment with realistic date
+            assessment_date = school_year_start
+            if assessment_template["trimester"] == 1:
+                assessment_date = date(2024, random.randint(10, 11), random.randint(1, 28))
+            elif assessment_template["trimester"] == 2:
+                assessment_date = date(2025, random.randint(1, 2), random.randint(1, 28))
+            
             assessment = Assessment(
                 title=assessment_template["title"],
                 description=assessment_template["description"],
+                date=assessment_date,
                 trimester=assessment_template["trimester"],
                 class_group_id=classe.id,
                 coefficient=assessment_template["coefficient"]
@@ -338,8 +421,13 @@ def init_midyear_data():
                 
                 # Add grades if assessment should be corrected
                 if assessment_template["corrected"]:
-                    # Generate realistic grades for all students
+                    # Get students eligible for this assessment using temporal logic
-                    for student in class_students:
+                    from repositories.temporal_student_repository import TemporalStudentRepository
+                    temporal_repo = TemporalStudentRepository()
+                    eligible_students = temporal_repo.find_eligible_for_assessment(assessment)
+                    
+                    # Generate realistic grades only for eligible students
+                    for student in eligible_students:
                         for element in grading_elements:
                             # Generate realistic grade based on element type
                             if element.grading_type == "notes":
@@ -370,7 +458,12 @@ def init_midyear_data():
                 
                 elif assessment_template.get("corrected") == False and random.random() < 0.4:
                     # Partially grade some assessments (40% of non-corrected ones get partial grades)
-                    students_to_grade = random.sample(class_students, len(class_students) // 2)
+                    from repositories.temporal_student_repository import TemporalStudentRepository
+                    temporal_repo = TemporalStudentRepository()
+                    eligible_students = temporal_repo.find_eligible_for_assessment(assessment)
+                    
+                    if eligible_students:
+                        students_to_grade = random.sample(eligible_students, len(eligible_students) // 2)
                         
                         for student in students_to_grade:
                             for element in grading_elements:
@@ -392,14 +485,27 @@ def init_midyear_data():
     
     total_students = sum(nb for _, _, nb in classes_data)
     total_assessments = len(classes) * len(assessments_templates)
-    click.echo(f"Database initialized for mid-year scenario:")
+    
-    click.echo(f"  - {len(classes)} classes with {total_students} students total")
+    # Compter les inscriptions actuelles et mouvements
-    click.echo(f"  - {total_assessments} assessments created")
+    total_current_students = StudentEnrollment.query.filter(StudentEnrollment.departure_date.is_(None)).count()
+    total_movements = len(movements_log)
+    
+    click.echo(f"Database initialized for mid-year scenario with temporal enrollments:")
+    click.echo(f"  - {len(classes)} classes with {total_students} students initially")
+    click.echo(f"  - {total_current_students} students currently enrolled")
+    click.echo(f"  - {total_movements} student movements simulated")
+    click.echo(f"  - {total_assessments} assessments created with temporal logic")
     click.echo(f"  - 4 fully corrected assessments per class (Trimester 1)")
     click.echo(f"  - 2 partially corrected assessments per class (Trimester 2)")
+    click.echo(f"")
+    click.echo(f"Student movements summary:")
+    for movement in movements_log[:5]:  # Montrer les 5 premiers mouvements
+        click.echo(f"  - {movement}")
+    if len(movements_log) > 5:
+        click.echo(f"  ... and {len(movements_log) - 5} more movements")
 
 def init_demo_data():
-    """Initialize database with simple demo data (original behavior)."""
+    """Initialize database with simple demo data using temporal enrollment model."""
     # Create sample class groups
     classe_6a = ClassGroup(name="6ème A", description="Classe de 6ème A", year="2024-2025")
     classe_5b = ClassGroup(name="5ème B", description="Classe de 5ème B", year="2024-2025")
@@ -408,7 +514,7 @@ def init_demo_data():
     db.session.add(classe_5b)
     db.session.commit()
     
-    # Create sample students
+    # Create sample students (without class_group_id)
     students_data = [
         ("Dupont", "Marie", "marie.dupont@email.com", classe_6a.id),
         ("Martin", "Pierre", "pierre.martin@email.com", classe_6a.id),
@@ -417,14 +523,28 @@ def init_demo_data():
         ("Bernard", "Emma", "emma.bernard@email.com", classe_5b.id),
     ]
     
-    for last_name, first_name, email, class_group_id in students_data:
+    school_start = date(2024, 9, 1)
+    
+    for last_name, first_name, email, intended_class_id in students_data:
+        # Create student without class assignment
         student = Student(
             last_name=last_name,
             first_name=first_name,
-            email=email,
+            email=email
-            class_group_id=class_group_id
+            # Pas de class_group_id dans le nouveau modèle temporel
         )
         db.session.add(student)
+        db.session.commit()  # Pour avoir l'ID du student
+        
+        # Create temporal enrollment
+        enrollment = StudentEnrollment(
+            student_id=student.id,
+            class_group_id=intended_class_id,
+            enrollment_date=school_start,
+            departure_date=None,  # Toujours inscrit
+            enrollment_reason="Inscription demo"
+        )
+        db.session.add(enrollment)
     
     db.session.commit()
     

models.py

@@ -1,6 +1,6 @@
 from flask_sqlalchemy import SQLAlchemy
-from datetime import datetime
+from datetime import datetime, date
-from sqlalchemy import CheckConstraint, Enum
+from sqlalchemy import CheckConstraint, Enum, Index
 from typing import Optional, Dict, Any
 
 db = SQLAlchemy()
@@ -57,8 +57,25 @@ class ClassGroup(db.Model):
     name = db.Column(db.String(100), nullable=False, unique=True)
     description = db.Column(db.Text)
     year = db.Column(db.String(20), nullable=False)
-    students = db.relationship('Student', backref='class_group', lazy=True)
+    
+    # SUPPRESSION de la relation directe students (remplacée par logique temporelle)
+    # students sera accessible via la relation StudentEnrollment
+    
     assessments = db.relationship('Assessment', backref='class_group', lazy=True)
+    # enrollments déjà défini via backref dans StudentEnrollment
+    
+    @property 
+    def students(self):
+        """Retourne les élèves actuellement inscrits dans cette classe."""
+        from repositories.temporal_student_repository import TemporalStudentRepository
+        temporal_repo = TemporalStudentRepository()
+        return temporal_repo.find_current_students_in_class(self.id)
+    
+    def get_students_at_date(self, check_date: date):
+        """Retourne les élèves inscrits dans cette classe à une date donnée."""
+        from repositories.temporal_student_repository import TemporalStudentRepository
+        temporal_repo = TemporalStudentRepository()
+        return temporal_repo.find_enrolled_in_class_at_date(self.id, check_date)
     
     def get_trimester_statistics(self, trimester=None):
         """
@@ -123,13 +140,72 @@ class ClassGroup(db.Model):
     def __repr__(self):
         return f'<ClassGroup {self.name}>'
 
+
+class StudentEnrollment(db.Model):
+    """
+    Historique temporel des inscriptions élève-classe.
+    Pattern: Association temporelle avec validité temporelle.
+    """
+    __tablename__ = 'student_enrollments'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    student_id = db.Column(db.Integer, db.ForeignKey('student.id'), nullable=False)
+    class_group_id = db.Column(db.Integer, db.ForeignKey('class_group.id'), nullable=False)
+    
+    # Période de validité
+    enrollment_date = db.Column(db.Date, nullable=False)  # Date d'arrivée
+    departure_date = db.Column(db.Date, nullable=True)    # Date de départ (NULL = toujours inscrit)
+    
+    # Métadonnées
+    enrollment_reason = db.Column(db.String(200))  # Motif d'arrivée
+    departure_reason = db.Column(db.String(200))   # Motif de départ
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # Relations
+    student = db.relationship('Student', backref='enrollments')
+    class_group = db.relationship('ClassGroup', backref='enrollments')
+    
+    # Contraintes d'intégrité temporelle
+    __table_args__ = (
+        # Pas de chevauchement de périodes pour un même élève
+        CheckConstraint(
+            'departure_date IS NULL OR departure_date >= enrollment_date',
+            name='check_valid_enrollment_period'
+        ),
+        # Index pour optimiser les requêtes temporelles
+        Index('idx_student_temporal', 'student_id', 'enrollment_date', 'departure_date'),
+        Index('idx_class_temporal', 'class_group_id', 'enrollment_date', 'departure_date'),
+    )
+    
+    def __repr__(self):
+        return f'<StudentEnrollment {self.student_id} in {self.class_group_id} from {self.enrollment_date}>'
+    
+    @property
+    def is_active(self) -> bool:
+        """Vérifie si l'inscription est actuellement active."""
+        return self.departure_date is None
+    
+    def is_valid_at_date(self, check_date: date) -> bool:
+        """Vérifie si l'inscription était valide à une date donnée."""
+        if check_date < self.enrollment_date:
+            return False
+        if self.departure_date and check_date > self.departure_date:
+            return False
+        return True
+
+
 class Student(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     last_name = db.Column(db.String(100), nullable=False)
     first_name = db.Column(db.String(100), nullable=False)
     email = db.Column(db.String(120), unique=True)
-    class_group_id = db.Column(db.Integer, db.ForeignKey('class_group.id'), nullable=False)
+    
+    # SUPPRESSION de class_group_id (relation statique)
+    # Remplacé par la relation temporelle via StudentEnrollment
+    
     grades = db.relationship('Grade', backref='student', lazy=True)
+    # enrollments déjà défini via backref dans StudentEnrollment
 
     def __repr__(self):
         return f'<Student {self.first_name} {self.last_name}>'
@@ -138,6 +214,42 @@ class Student(db.Model):
     def full_name(self):
         return f"{self.first_name} {self.last_name}"
     
+    def get_current_class(self) -> Optional['ClassGroup']:
+        """Retourne la classe actuelle de l'élève (inscription active)."""
+        active_enrollment = StudentEnrollment.query.filter_by(
+            student_id=self.id,
+            departure_date=None
+        ).first()
+        return active_enrollment.class_group if active_enrollment else None
+    
+    def get_current_enrollment(self) -> Optional['StudentEnrollment']:
+        """Retourne l'inscription actuelle de l'élève (inscription active)."""
+        return StudentEnrollment.query.filter_by(
+            student_id=self.id,
+            departure_date=None
+        ).first()
+    
+    def get_class_at_date(self, check_date: date) -> Optional['ClassGroup']:
+        """Retourne la classe de l'élève à une date donnée."""
+        enrollment = StudentEnrollment.query.filter(
+            StudentEnrollment.student_id == self.id,
+            StudentEnrollment.enrollment_date <= check_date,
+            db.or_(
+                StudentEnrollment.departure_date.is_(None),
+                StudentEnrollment.departure_date >= check_date
+            )
+        ).first()
+        return enrollment.class_group if enrollment else None
+    
+    def is_eligible_for_assessment(self, assessment: 'Assessment') -> bool:
+        """Vérifie si l'élève peut être évalué sur cette évaluation."""
+        if not assessment.date:
+            return False
+        
+        # L'élève doit être inscrit dans la classe de l'évaluation à la date de l'évaluation
+        class_at_assessment_date = self.get_class_at_date(assessment.date)
+        return class_at_assessment_date and class_at_assessment_date.id == assessment.class_group_id
+
 class Assessment(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     title = db.Column(db.String(200), nullable=False)
@@ -159,46 +271,53 @@ class Assessment(db.Model):
     def grading_progress(self):
         """
         Calcule le pourcentage de progression des notes saisies pour cette évaluation.
-        Utilise AssessmentProgressService avec injection de dépendances.
+        Utilise TemporalAssessmentProgressService avec injection de dépendances.
         
         Returns:
-            Dict avec les statistiques de progression
+            Dict avec les statistiques de progression (version temporelle)
         """
-        from providers.concrete_providers import AssessmentServicesFactory
+        from services.temporal_facade import TemporalAssessmentServicesFactory
         
         # Injection de dépendances pour éviter les imports circulaires
-        services_facade = AssessmentServicesFactory.create_facade()
+        temporal_facade = TemporalAssessmentServicesFactory.create_temporal_facade()
-        progress_result = services_facade.get_grading_progress(self)
+        progress_result = temporal_facade.get_grading_progress(self)
         
-        # Conversion du ProgressResult vers le format dict attendu
+        # Conversion du TemporalProgressResult vers le format dict attendu
         return {
             'percentage': progress_result.percentage,
             'completed': progress_result.completed,
             'total': progress_result.total,
             'status': progress_result.status,
-            'students_count': progress_result.students_count
+            'students_count': progress_result.students_count,
+            'eligible_students_count': progress_result.eligible_students_count,
+            'total_students_in_class': progress_result.total_students_in_class
         }
     
     def calculate_student_scores(self, grade_repo=None):
-        """Calcule les scores de tous les élèves pour cette évaluation.
+        """Calcule les scores de tous les élèves éligibles pour cette évaluation.
         Retourne un dictionnaire avec les scores par élève et par exercice.
-        Utilise StudentScoreCalculator avec injection de dépendances.
+        Utilise TemporalStudentScoreCalculator avec injection de dépendances.
         
         Args:
             grade_repo: Repository des notes (optionnel, maintenu pour compatibilité)
         """
-        from providers.concrete_providers import AssessmentServicesFactory
+        from services.temporal_facade import TemporalAssessmentServicesFactory
         
-        services = AssessmentServicesFactory.create_facade()
+        temporal_facade = TemporalAssessmentServicesFactory.create_temporal_facade()
-        students_scores_data, exercise_scores_data = services.score_calculator.calculate_student_scores(self)
+        students_scores_data, exercise_scores_data = temporal_facade.score_calculator.calculate_student_scores(self)
+        
+        # Récupérer les élèves éligibles pour la conversion
+        eligible_students = temporal_facade.get_eligible_students(self)
+        eligible_students_dict = {s.id: s for s in eligible_students}
         
         # Conversion vers format legacy pour compatibilité
         students_scores = {}
         exercise_scores = {}
         
         for student_id, score_data in students_scores_data.items():
-            # Récupérer l'objet étudiant pour compatibilité
+            # Utiliser les élèves éligibles au lieu de tous les élèves de la classe
-            student_obj = next(s for s in self.class_group.students if s.id == student_id)
+            student_obj = eligible_students_dict.get(student_id)
+            if student_obj:
                 students_scores[student_id] = {
                     'student': student_obj,
                     'total_score': score_data.total_score,
@@ -214,11 +333,11 @@ class Assessment(db.Model):
     def get_assessment_statistics(self):
         """
         Calcule les statistiques descriptives pour cette évaluation.
-        Utilise AssessmentStatisticsService avec injection de dépendances.
+        Utilise TemporalAssessmentStatisticsService avec injection de dépendances.
         """
-        from providers.concrete_providers import AssessmentServicesFactory
+        from services.temporal_facade import TemporalAssessmentServicesFactory
-        services = AssessmentServicesFactory.create_facade()
+        temporal_facade = TemporalAssessmentServicesFactory.create_temporal_facade()
-        result = services.statistics_service.get_assessment_statistics(self)
+        result = temporal_facade.get_assessment_statistics(self)
         
         # Conversion du StatisticsResult vers le format dict legacy
         return {

repositories/appreciation_repository.py

@@ -71,10 +71,12 @@ class AppreciationRepository(BaseRepository[CouncilAppreciation]):
 
     def get_completion_stats(self, class_group_id: int, trimester: int) -> dict:
         """Statistiques de completion des appréciations pour une classe/trimestre."""
-        from models import Student
+        from repositories.temporal_student_repository import TemporalStudentRepository
         
-        # Nombre total d'élèves dans la classe
+        # Nombre total d'élèves actuellement dans la classe
-        total_students = Student.query.filter_by(class_group_id=class_group_id).count()
+        temporal_repo = TemporalStudentRepository()
+        current_students = temporal_repo.find_current_students_in_class(class_group_id)
+        total_students = len(current_students)
         
         # Nombre d'appréciations existantes
         total_appreciations = CouncilAppreciation.query.filter_by(

repositories/class_repository.py

@@ -99,21 +99,29 @@ class ClassRepository(BaseRepository[ClassGroup]):
         Returns:
             Tuple[bool, Dict[str, int]]: (peut_être_supprimée, statistiques_dépendances)
         """
-        students_count = Student.query.filter_by(class_group_id=id).count()
+        from repositories.temporal_student_repository import TemporalStudentRepository
+        from models import StudentEnrollment
+        
+        # Compter les élèves actuellement inscrits ou ayant été inscrits
+        temporal_repo = TemporalStudentRepository()
+        current_students = temporal_repo.find_current_students_in_class(id)
+        enrollments_count = StudentEnrollment.query.filter_by(class_group_id=id).count()
         assessments_count = Assessment.query.filter_by(class_group_id=id).count()
         
         dependencies = {
-            'students': students_count,
+            'students': len(current_students),
+            'enrollments': enrollments_count,
             'assessments': assessments_count
         }
         
-        can_delete = students_count == 0 and assessments_count == 0
+        # Une classe peut être supprimée s'il n'y a aucune inscription historique ni évaluation
+        can_delete = enrollments_count == 0 and assessments_count == 0
         
         return can_delete, dependencies
     
     def find_with_students_ordered(self, id: int) -> Optional[ClassGroup]:
         """
-        Trouve une classe avec ses étudiants triés par nom.
+        Trouve une classe avec ses étudiants actuels triés par nom.
         
         Args:
             id: Identifiant de la classe
@@ -125,10 +133,10 @@ class ClassRepository(BaseRepository[ClassGroup]):
         if not class_group:
             return None
         
-        # Charger les étudiants triés
+        # Utiliser la logique temporelle pour récupérer les élèves actuels
-        students = Student.query.filter_by(class_group_id=id).order_by(
+        from repositories.temporal_student_repository import TemporalStudentRepository
-            Student.last_name, Student.first_name
+        temporal_repo = TemporalStudentRepository()
-        ).all()
+        students = temporal_repo.find_current_students_in_class(id)
         
         # Assigner les étudiants triés à la classe
         class_group._students_ordered = students
@@ -162,7 +170,7 @@ class ClassRepository(BaseRepository[ClassGroup]):
     
     def find_with_full_details(self, id: int) -> Optional[ClassGroup]:
         """
-        Trouve une classe avec tous ses détails (étudiants et évaluations).
+        Trouve une classe avec tous ses détails (étudiants actuels et évaluations).
         
         Args:
             id: Identifiant de la classe
@@ -170,22 +178,32 @@ class ClassRepository(BaseRepository[ClassGroup]):
         Returns:
             Optional[ClassGroup]: La classe avec tous ses détails ou None
         """
-        return ClassGroup.query.options(
+        class_group = ClassGroup.query.options(
-            joinedload(ClassGroup.students),
             joinedload(ClassGroup.assessments)
         ).filter_by(id=id).first()
         
+        if class_group:
+            # Charger manuellement les élèves actuels avec la logique temporelle
+            from repositories.temporal_student_repository import TemporalStudentRepository
+            temporal_repo = TemporalStudentRepository()
+            class_group._current_students = temporal_repo.find_current_students_in_class(id)
+        
+        return class_group
+    
     def get_students_count(self, id: int) -> int:
         """
-        Compte le nombre d'étudiants dans une classe.
+        Compte le nombre d'étudiants actuellement dans une classe.
         
         Args:
             id: Identifiant de la classe
             
         Returns:
-            int: Nombre d'étudiants
+            int: Nombre d'étudiants actuels
         """
-        return Student.query.filter_by(class_group_id=id).count()
+        from repositories.temporal_student_repository import TemporalStudentRepository
+        temporal_repo = TemporalStudentRepository()
+        current_students = temporal_repo.find_current_students_in_class(id)
+        return len(current_students)
     
     def get_assessments_count(self, id: int) -> int:
         """
@@ -212,8 +230,7 @@ class ClassRepository(BaseRepository[ClassGroup]):
     def find_with_statistics(self, class_id: int, trimester: Optional[int] = None) -> Optional[ClassGroup]:
         """
         Récupère une classe avec toutes les données nécessaires pour les statistiques.
-        Optimise les requêtes pour éviter les problèmes N+1 en chargeant toutes les relations
+        Utilise la logique temporelle pour les étudiants et optimise les requêtes.
-        nécessaires en une seule requête.
         
         Args:
             class_id: Identifiant de la classe
@@ -223,17 +240,21 @@ class ClassRepository(BaseRepository[ClassGroup]):
             Optional[ClassGroup]: La classe avec toutes ses données ou None
         """
         try:
-            # Construire la requête avec toutes les jointures optimisées
+            # Construire la requête sans la relation students (supprimée du modèle temporel)
             query = ClassGroup.query.options(
-                joinedload(ClassGroup.students),
                 selectinload(ClassGroup.assessments).selectinload(Assessment.exercises)
                 .selectinload(Exercise.grading_elements).selectinload(GradingElement.grades)
             ).filter_by(id=class_id)
             
             class_group = query.first()
             
-            # Filtrer les évaluations après récupération pour optimiser les calculs statistiques
             if class_group:
+                # Charger les élèves actuels avec la logique temporelle
+                from repositories.temporal_student_repository import TemporalStudentRepository
+                temporal_repo = TemporalStudentRepository()
+                class_group._current_students = temporal_repo.find_current_students_in_class(class_id)
+                
+                # Filtrer les évaluations après récupération pour optimiser les calculs statistiques
                 if trimester is not None:
                     class_group._filtered_assessments = [
                         assessment for assessment in class_group.assessments
@@ -303,9 +324,8 @@ class ClassRepository(BaseRepository[ClassGroup]):
             Optional[ClassGroup]: La classe avec ses évaluations optimisées ou None
         """
         try:
-            # Single-query avec toutes les relations nécessaires
+            # Single-query avec toutes les relations nécessaires (sans students)
             base_query = ClassGroup.query.options(
-                joinedload(ClassGroup.students),
                 selectinload(ClassGroup.assessments).selectinload(Assessment.exercises)
                 .selectinload(Exercise.grading_elements).selectinload(GradingElement.grades)
             )
@@ -315,6 +335,11 @@ class ClassRepository(BaseRepository[ClassGroup]):
             if not class_group:
                 return None
             
+            # Charger les élèves actuels avec la logique temporelle
+            from repositories.temporal_student_repository import TemporalStudentRepository
+            temporal_repo = TemporalStudentRepository()
+            class_group._current_students = temporal_repo.find_current_students_in_class(class_id)
+            
             # Pré-filtrer les évaluations par trimestre
             if trimester is not None:
                 filtered_assessments = [

repositories/temporal_student_repository.py

@@ -0,0 +1,166 @@
+from typing import List, Optional, Tuple
+from datetime import date
+from sqlalchemy import and_, or_
+from models import db, Student, StudentEnrollment, Assessment
+from repositories.base_repository import BaseRepository
+
+
+class TemporalStudentRepository(BaseRepository[Student]):
+    """Repository pour gérer les étudiants avec logique temporelle."""
+    
+    def __init__(self):
+        super().__init__(Student)
+    
+    def find_enrolled_in_class_at_date(self, class_group_id: int, check_date: date) -> List[Student]:
+        """Trouve les étudiants inscrits dans une classe à une date donnée."""
+        from sqlalchemy import func
+        return db.session.query(Student)\
+            .join(StudentEnrollment)\
+            .filter(
+                StudentEnrollment.class_group_id == class_group_id,
+                StudentEnrollment.enrollment_date <= check_date,
+                or_(
+                    StudentEnrollment.departure_date.is_(None),
+                    StudentEnrollment.departure_date >= check_date
+                )
+            )\
+            .order_by(func.lower(Student.last_name), func.lower(Student.first_name))\
+            .all()
+    
+    def find_eligible_for_assessment(self, assessment: Assessment) -> List[Student]:
+        """Trouve les étudiants éligibles pour une évaluation donnée."""
+        if not assessment.date:
+            return []
+        
+        return self.find_enrolled_in_class_at_date(assessment.class_group_id, assessment.date)
+    
+    def find_current_students_in_class(self, class_group_id: int) -> List[Student]:
+        """Trouve les étudiants actuellement inscrits dans une classe."""
+        from sqlalchemy import func
+        return db.session.query(Student)\
+            .join(StudentEnrollment)\
+            .filter(
+                StudentEnrollment.class_group_id == class_group_id,
+                StudentEnrollment.departure_date.is_(None)
+            )\
+            .order_by(func.lower(Student.last_name), func.lower(Student.first_name))\
+            .all()
+    
+    def get_enrollment_history(self, student_id: int) -> List[StudentEnrollment]:
+        """Récupère l'historique complet des inscriptions d'un élève."""
+        return StudentEnrollment.query\
+            .filter_by(student_id=student_id)\
+            .order_by(StudentEnrollment.enrollment_date.desc())\
+            .all()
+    
+    def find_students_with_movements_in_period(self, start_date: date, end_date: date) -> List[Tuple[Student, List[StudentEnrollment]]]:
+        """Trouve les étudiants qui ont eu des mouvements (arrivée/départ) dans une période avec leurs inscriptions."""
+        # Récupérer les étudiants qui ont eu des mouvements dans la période
+        students_with_movements = db.session.query(Student)\
+            .join(StudentEnrollment)\
+            .filter(
+                or_(
+                    # Arrivées dans la période
+                    and_(
+                        StudentEnrollment.enrollment_date >= start_date,
+                        StudentEnrollment.enrollment_date <= end_date
+                    ),
+                    # Départs dans la période
+                    and_(
+                        StudentEnrollment.departure_date >= start_date,
+                        StudentEnrollment.departure_date <= end_date
+                    )
+                )
+            )\
+            .distinct()\
+            .order_by(Student.last_name, Student.first_name)\
+            .all()
+        
+        # Pour chaque étudiant, récupérer ses mouvements dans la période
+        result = []
+        for student in students_with_movements:
+            movements = StudentEnrollment.query\
+                .filter_by(student_id=student.id)\
+                .filter(
+                    or_(
+                        # Arrivées dans la période
+                        and_(
+                            StudentEnrollment.enrollment_date >= start_date,
+                            StudentEnrollment.enrollment_date <= end_date
+                        ),
+                        # Départs dans la période
+                        and_(
+                            StudentEnrollment.departure_date >= start_date,
+                            StudentEnrollment.departure_date <= end_date
+                        )
+                    )
+                )\
+                .order_by(StudentEnrollment.enrollment_date.desc())\
+                .all()
+            
+            if movements:
+                result.append((student, movements))
+        
+        return result
+    
+    def create_enrollment(self, student_id: int, class_group_id: int, 
+                         enrollment_date: date, enrollment_reason: str = None) -> StudentEnrollment:
+        """Crée une nouvelle inscription pour un élève."""
+        # Vérifier s'il y a déjà une inscription active
+        active_enrollment = StudentEnrollment.query.filter_by(
+            student_id=student_id,
+            departure_date=None
+        ).first()
+        
+        if active_enrollment:
+            raise ValueError("L'élève a déjà une inscription active")
+        
+        # Créer la nouvelle inscription
+        enrollment = StudentEnrollment(
+            student_id=student_id,
+            class_group_id=class_group_id,
+            enrollment_date=enrollment_date,
+            enrollment_reason=enrollment_reason
+        )
+        
+        db.session.add(enrollment)
+        return enrollment
+    
+    def end_enrollment(self, student_id: int, departure_date: date, 
+                      departure_reason: str = None) -> Optional[StudentEnrollment]:
+        """Termine l'inscription active d'un élève."""
+        active_enrollment = StudentEnrollment.query.filter_by(
+            student_id=student_id,
+            departure_date=None
+        ).first()
+        
+        if not active_enrollment:
+            return None
+        
+        active_enrollment.departure_date = departure_date
+        active_enrollment.departure_reason = departure_reason
+        
+        return active_enrollment
+    
+    def transfer_student(self, student_id: int, new_class_group_id: int, 
+                        transfer_date: date, transfer_reason: str = None) -> tuple[StudentEnrollment, StudentEnrollment]:
+        """Transfère un élève d'une classe à une autre."""
+        # Terminer l'inscription actuelle
+        old_enrollment = self.end_enrollment(
+            student_id, 
+            transfer_date, 
+            f"Transfert: {transfer_reason}" if transfer_reason else "Transfert"
+        )
+        
+        if not old_enrollment:
+            raise ValueError("Aucune inscription active trouvée pour cet élève")
+        
+        # Créer la nouvelle inscription
+        new_enrollment = self.create_enrollment(
+            student_id,
+            new_class_group_id,
+            transfer_date,
+            f"Transfert: {transfer_reason}" if transfer_reason else "Transfert"
+        )
+        
+        return old_enrollment, new_enrollment

routes/classes.py

@@ -1,8 +1,9 @@
 from flask import Blueprint, render_template, redirect, url_for, flash, request, jsonify, current_app, abort
-from models import db, ClassGroup, Student, Assessment
+from models import db, ClassGroup, Student, Assessment, StudentEnrollment
 from forms import ClassGroupForm
 from utils import handle_db_errors, ValidationError
 from repositories.class_repository import ClassRepository
+from datetime import date, datetime
 
 bp = Blueprint('classes', __name__, url_prefix='/classes')
 
@@ -320,7 +321,8 @@ def save_appreciation_api(class_id, student_id):
         # Vérifier que l'élève appartient à cette classe
         from models import Student
         student = Student.query.get_or_404(student_id)
-        if student.class_group_id != class_id:
+        current_class = student.get_current_class()
+        if not current_class or current_class.id != class_id:
             return jsonify({'success': False, 'error': 'Élève non trouvé dans cette classe'}), 403
         
         # Préparer les données d'appréciation
@@ -414,3 +416,362 @@ def council_data_api(class_id):
     except Exception as e:
         current_app.logger.error(f'Erreur API données conseil classe {class_id}: {e}')
         return jsonify({'error': 'Erreur lors de la récupération des données'}), 500
+
+@bp.route('/<int:id>/students')
+@handle_db_errors
+def students(id):
+    """Page de gestion des élèves d'une classe."""
+    class_repo = ClassRepository()
+    class_group = class_repo.get_or_404(id)
+    
+    try:
+        # Repository temporel pour les élèves
+        from repositories.temporal_student_repository import TemporalStudentRepository
+        temporal_repo = TemporalStudentRepository()
+        
+        # Élèves actuellement inscrits
+        current_students = temporal_repo.find_current_students_in_class(id)
+        
+        # Historique des mouvements (derniers 6 mois)
+        from datetime import date, timedelta
+        six_months_ago = date.today() - timedelta(days=180)
+        movements = temporal_repo.find_students_with_movements_in_period(six_months_ago, date.today())
+        
+        # Filtrer les mouvements de cette classe
+        class_movements = []
+        for student, enrollments in movements:
+            class_enrollments = [e for e in enrollments if e.class_group_id == id]
+            if class_enrollments:
+                class_movements.append((student, class_enrollments))
+        
+        # Statistiques d'effectifs
+        total_current = len(current_students)
+        
+        # Compter les arrivées et départs récents (30 derniers jours)
+        thirty_days_ago = date.today() - timedelta(days=30)
+        recent_arrivals = 0
+        recent_departures = 0
+        
+        for student, enrollments in class_movements:
+            for enrollment in enrollments:
+                if enrollment.enrollment_date and enrollment.enrollment_date >= thirty_days_ago:
+                    recent_arrivals += 1
+                if enrollment.departure_date and enrollment.departure_date >= thirty_days_ago:
+                    recent_departures += 1
+        
+        # Toutes les classes pour les transferts
+        all_classes = ClassRepository().find_all_ordered('name')
+        other_classes = [c for c in all_classes if c.id != id]
+        
+        # Élèves non inscrits dans cette classe pour inscription
+        from sqlalchemy import func
+        all_students = Student.query.order_by(func.lower(Student.last_name), func.lower(Student.first_name)).all()
+        available_students = []
+        for student in all_students:
+            current_class = student.get_current_class()
+            if not current_class or current_class.id != id:
+                available_students.append(student)
+        
+        current_app.logger.debug(f'Page élèves classe {id} - {total_current} élèves actuels, {len(class_movements)} mouvements')
+        
+        return render_template('class_students.html',
+                             class_group=class_group,
+                             current_students=current_students,
+                             class_movements=class_movements,
+                             other_classes=other_classes,
+                             available_students=available_students,
+                             stats={
+                                 'total_current': total_current,
+                                 'recent_arrivals': recent_arrivals,
+                                 'recent_departures': recent_departures
+                             })
+                             
+    except Exception as e:
+        current_app.logger.error(f'Erreur page élèves classe {id}: {e}')
+        flash('Erreur lors du chargement des données des élèves.', 'error')
+        return redirect(url_for('classes.dashboard', id=id))
+
+@bp.route('/enroll', methods=['POST'])
+@handle_db_errors
+def enroll_student():
+    """Inscrire un élève dans une classe (existant ou nouveau)."""
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        class_group_id = int(data.get('class_id'))
+        enrollment_date_str = data.get('enrollment_date', str(date.today()))
+        enrollment_reason = data.get('enrollment_reason', '')
+        mode = data.get('mode', 'existing')
+        
+        # Validation de la date
+        enrollment_date = datetime.strptime(enrollment_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que la classe existe
+        class_group = ClassGroup.query.get_or_404(class_group_id)
+        
+        if mode == 'new':
+            # Mode création d'un nouvel élève
+            first_name = data.get('new_first_name', '').strip()
+            last_name = data.get('new_last_name', '').strip()
+            email = data.get('new_email', '').strip() or None
+            
+            if not first_name or not last_name:
+                raise ValueError("Le prénom et le nom sont obligatoires pour un nouvel élève")
+            
+            # Vérifier que l'email n'est pas déjà utilisé si fourni
+            if email:
+                existing_email = Student.query.filter_by(email=email).first()
+                if existing_email:
+                    raise ValueError("Un élève avec cet email existe déjà")
+            
+            # Créer le nouvel élève
+            student = Student(
+                first_name=first_name,
+                last_name=last_name,
+                email=email
+            )
+            db.session.add(student)
+            db.session.flush()  # Pour obtenir l'ID du nouvel élève
+            
+            current_app.logger.info(f'Nouvel élève créé: {student.full_name}')
+            
+        else:
+            # Mode élève existant
+            student_id = data.get('student_id')
+            if not student_id:
+                raise ValueError("Veuillez sélectionner un élève")
+            
+            student_id = int(student_id)
+            student = Student.query.get_or_404(student_id)
+        
+        # Créer l'inscription
+        enrollment = temporal_repo.create_enrollment(
+            student.id, class_group_id, enrollment_date, enrollment_reason
+        )
+        db.session.commit()
+        
+        current_app.logger.info(f'Inscription créée: Élève {student.full_name} en {class_group.name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Élève {student.full_name} inscrit en {class_group.name}',
+                'enrollment_id': enrollment.id,
+                'student_id': student.id,
+                'is_new_student': mode == 'new'
+            })
+        else:
+            if mode == 'new':
+                flash(f'Nouvel élève {student.full_name} créé et inscrit en {class_group.name}', 'success')
+            else:
+                flash(f'Élève {student.full_name} inscrit en {class_group.name}', 'success')
+            
+            # Pour une mise à jour immédiate de la liste, utiliser JavaScript pour recharger
+            return redirect(url_for('classes.students', id=class_group_id) + '?reload=1')
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur inscription élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(request.referrer or url_for('classes'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur inscription élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors de l\'inscription'}), 500
+        else:
+            flash('Erreur lors de l\'inscription', 'error')
+            return redirect(request.referrer or url_for('classes'))
+
+@bp.route('/transfer', methods=['POST'])
+@handle_db_errors
+def transfer_student():
+    """Transférer un élève d'une classe à une autre."""
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        student_id = int(data.get('student_id'))
+        new_class_group_id = int(data.get('new_class_id'))
+        transfer_date_str = data.get('transfer_date', str(date.today()))
+        transfer_reason = data.get('transfer_reason', '')
+        
+        # Validation de la date
+        transfer_date = datetime.strptime(transfer_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que l'élève et les classes existent
+        student = Student.query.get_or_404(student_id)
+        new_class_group = ClassGroup.query.get_or_404(new_class_group_id)
+        
+        # Effectuer le transfert
+        old_enrollment, new_enrollment = temporal_repo.transfer_student(
+            student_id, new_class_group_id, transfer_date, transfer_reason
+        )
+        db.session.commit()
+        
+        current_app.logger.info(f'Transfert effectué: Élève {student.full_name} vers {new_class_group.name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Élève {student.full_name} transféré vers {new_class_group.name}',
+                'old_enrollment_id': old_enrollment.id,
+                'new_enrollment_id': new_enrollment.id
+            })
+        else:
+            flash(f'Élève {student.full_name} transféré vers {new_class_group.name}', 'success')
+            # Retourner à la page d'origine avec rechargement
+            referrer = request.referrer
+            if referrer and 'classes/' in referrer and '/students' in referrer:
+                return redirect(referrer + ('&' if '?' in referrer else '?') + 'reload=1')
+            return redirect(request.referrer or url_for('classes'))
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur transfert élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(request.referrer or url_for('classes'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur transfert élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors du transfert'}), 500
+        else:
+            flash('Erreur lors du transfert', 'error')
+            return redirect(request.referrer or url_for('classes'))
+
+@bp.route('/departure', methods=['POST'])
+@handle_db_errors
+def student_departure():
+    """Enregistrer le départ d'un élève."""
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        student_id = int(data.get('student_id'))
+        departure_date_str = data.get('departure_date', str(date.today()))
+        departure_reason = data.get('departure_reason', '')
+        
+        # Validation de la date
+        departure_date = datetime.strptime(departure_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que l'élève existe
+        student = Student.query.get_or_404(student_id)
+        
+        # Terminer l'inscription active
+        enrollment = temporal_repo.end_enrollment(
+            student_id, departure_date, departure_reason
+        )
+        
+        if not enrollment:
+            raise ValueError("Aucune inscription active trouvée pour cet élève")
+        
+        db.session.commit()
+        
+        current_app.logger.info(f'Départ enregistré: Élève {student.full_name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Départ de {student.full_name} enregistré',
+                'enrollment_id': enrollment.id
+            })
+        else:
+            flash(f'Départ de {student.full_name} enregistré', 'success')
+            # Retourner à la page d'origine avec rechargement
+            referrer = request.referrer
+            if referrer and 'classes/' in referrer and '/students' in referrer:
+                return redirect(referrer + ('&' if '?' in referrer else '?') + 'reload=1')
+            return redirect(request.referrer or url_for('classes'))
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur départ élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(request.referrer or url_for('classes'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur départ élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors de l\'enregistrement du départ'}), 500
+        else:
+            flash('Erreur lors de l\'enregistrement du départ', 'error')
+            return redirect(request.referrer or url_for('classes'))
+
+@bp.route('/cancel-departure', methods=['POST'])
+@handle_db_errors
+def cancel_departure():
+    """Annuler le départ d'un élève (remettre inscription active)."""
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        enrollment_id = int(data.get('enrollment_id'))
+        
+        # Récupérer l'inscription
+        enrollment = StudentEnrollment.query.get_or_404(enrollment_id)
+        
+        # Vérifier que l'inscription a bien une date de départ
+        if not enrollment.departure_date:
+            flash('Cette inscription n\'a pas de date de départ à annuler', 'error')
+            return redirect(request.referrer or url_for('classes'))
+        
+        # Vérifier qu'il n'y a pas déjà une inscription active pour cet élève
+        active_enrollment = StudentEnrollment.query.filter_by(
+            student_id=enrollment.student_id,
+            departure_date=None
+        ).first()
+        
+        if active_enrollment:
+            flash(f'L\'élève {enrollment.student.first_name} {enrollment.student.last_name} est déjà inscrit dans {active_enrollment.class_group.name}', 'error')
+            return redirect(request.referrer or url_for('classes'))
+        
+        # Annuler le départ en supprimant la date de départ
+        old_departure_date = enrollment.departure_date
+        enrollment.departure_date = None
+        enrollment.departure_reason = None
+        
+        db.session.commit()
+        
+        current_app.logger.info(f'Départ annulé - Élève {enrollment.student_id} réintégré en {enrollment.class_group.name}')
+        flash(f'Départ de {enrollment.student.first_name} {enrollment.student.last_name} annulé. Élève réintégré en {enrollment.class_group.name}', 'success')
+        
+        # Rediriger vers la page d'origine avec rechargement
+        referrer = request.referrer
+        if referrer and 'classes/' in referrer and '/students' in referrer:
+            return redirect(referrer + ('&' if '?' in referrer else '?') + 'reload=1')
+        return redirect(request.referrer or url_for('classes'))
+    
+    except (ValueError, TypeError) as e:
+        current_app.logger.error(f'Erreur données annulation départ: {e}')
+        flash('Données d\'annulation invalides', 'error')
+        return redirect(request.referrer or url_for('classes'))
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur annulation départ: {e}')
+        flash('Erreur lors de l\'annulation du départ', 'error')
+        return redirect(request.referrer or url_for('classes'))

routes/grading.py

@@ -8,11 +8,14 @@ bp = Blueprint('grading', __name__)
 @bp.route('/assessments/<int:assessment_id>/grading')
 def assessment_grading(assessment_id):
     assessment_repo = AssessmentRepository()
-    student_repo = StudentRepository()
     grade_repo = GradeRepository()
     
     assessment = assessment_repo.get_or_404(assessment_id)
-    students = student_repo.find_by_class_ordered(assessment.class_group_id)
+    
+    # Utilisation de la logique temporelle pour récupérer les élèves éligibles
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_student_repo = TemporalStudentRepository()
+    students = temporal_student_repo.find_eligible_for_assessment(assessment)
     
     # Get all grading elements for this assessment
     grading_elements = []
@@ -45,8 +48,9 @@ def assessment_grading(assessment_id):
 @bp.route('/assessments/<int:assessment_id>/grading/save', methods=['POST'])
 def save_grades(assessment_id):
     assessment_repo = AssessmentRepository()
-    student_repo = StudentRepository()
     grade_repo = GradeRepository()
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_student_repo = TemporalStudentRepository()
     
     assessment = assessment_repo.get_or_404(assessment_id)
     errors = []
@@ -75,7 +79,7 @@ def save_grades(assessment_id):
                 
                 # Vérifier que l'étudiant et l'élément existent avec protection
                 try:
-                    student = student_repo.find_by_id(student_id)
+                    student = temporal_student_repo.find_by_id(student_id)
                     grading_element = GradingElement.query.get(element_id)
                 except Exception as e:
                     errors.append(f'Erreur DB pour {key}: {str(e)}')
@@ -222,8 +226,9 @@ def save_grades(assessment_id):
 def save_single_grade(assessment_id):
     """Sauvegarde incrémentale d'une seule note"""
     assessment_repo = AssessmentRepository()
-    student_repo = StudentRepository()
     grade_repo = GradeRepository()
+    from repositories.temporal_student_repository import TemporalStudentRepository
+    temporal_student_repo = TemporalStudentRepository()
     
     assessment = assessment_repo.get_or_404(assessment_id)
     
@@ -235,7 +240,7 @@ def save_single_grade(assessment_id):
         comment = data.get('comment', '').strip()
         
         # Vérifications
-        student = student_repo.find_by_id(student_id)
+        student = temporal_student_repo.find_by_id(student_id)
         grading_element = GradingElement.query.get(element_id)
         
         if not student or not grading_element:

routes/student_movements.py

@@ -0,0 +1,336 @@
+from flask import Blueprint, render_template, request, jsonify, flash, redirect, url_for, current_app
+from datetime import date, datetime
+from models import db, Student, ClassGroup, StudentEnrollment
+from repositories.temporal_student_repository import TemporalStudentRepository
+from utils import handle_db_errors
+
+bp = Blueprint('student_movements', __name__, url_prefix='/movements')
+
+@bp.route('/')
+@handle_db_errors
+def movements_index():
+    """Page principale de gestion des mouvements d'élèves."""
+    temporal_repo = TemporalStudentRepository()
+    
+    # Récupérer les mouvements récents (30 derniers jours)
+    from datetime import date, timedelta
+    recent_start = date.today() - timedelta(days=30)
+    recent_end = date.today()
+    
+    recent_movements = temporal_repo.find_students_with_movements_in_period(recent_start, recent_end)
+    
+    # Récupérer toutes les classes pour les formulaires
+    classes = ClassGroup.query.order_by(ClassGroup.name).all()
+    
+    # Récupérer tous les élèves pour le formulaire d'inscription
+    all_students = Student.query.order_by(Student.last_name, Student.first_name).all()
+    
+    return render_template('student_movements.html',
+                         recent_movements=recent_movements,
+                         classes=classes,
+                         all_students=all_students)
+
+@bp.route('/enroll', methods=['POST'])
+@handle_db_errors
+def enroll_student():
+    """Inscrire un élève dans une classe."""
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        student_id = int(data.get('student_id'))
+        class_group_id = int(data.get('class_group_id'))
+        enrollment_date_str = data.get('enrollment_date', str(date.today()))
+        enrollment_reason = data.get('enrollment_reason', '')
+        
+        # Validation de la date
+        enrollment_date = datetime.strptime(enrollment_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que l'élève et la classe existent
+        student = Student.query.get_or_404(student_id)
+        class_group = ClassGroup.query.get_or_404(class_group_id)
+        
+        # Créer l'inscription
+        enrollment = temporal_repo.create_enrollment(
+            student_id, class_group_id, enrollment_date, enrollment_reason
+        )
+        db.session.commit()
+        
+        current_app.logger.info(f'Inscription créée: Élève {student.full_name} en {class_group.name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Élève {student.full_name} inscrit en {class_group.name}',
+                'enrollment_id': enrollment.id
+            })
+        else:
+            flash(f'Élève {student.full_name} inscrit en {class_group.name}', 'success')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur inscription élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur inscription élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors de l\'inscription'}), 500
+        else:
+            flash('Erreur lors de l\'inscription', 'error')
+            return redirect(url_for('student_movements.movements_index'))
+
+@bp.route('/departure', methods=['POST'])
+@handle_db_errors
+def student_departure():
+    """Enregistrer le départ d'un élève."""
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        student_id = int(data.get('student_id'))
+        departure_date_str = data.get('departure_date', str(date.today()))
+        departure_reason = data.get('departure_reason', '')
+        
+        # Validation de la date
+        departure_date = datetime.strptime(departure_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que l'élève existe
+        student = Student.query.get_or_404(student_id)
+        
+        # Terminer l'inscription active
+        enrollment = temporal_repo.end_enrollment(
+            student_id, departure_date, departure_reason
+        )
+        
+        if not enrollment:
+            raise ValueError("Aucune inscription active trouvée pour cet élève")
+        
+        db.session.commit()
+        
+        current_app.logger.info(f'Départ enregistré: Élève {student.full_name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Départ de {student.full_name} enregistré',
+                'enrollment_id': enrollment.id
+            })
+        else:
+            flash(f'Départ de {student.full_name} enregistré', 'success')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur départ élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur départ élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors de l\'enregistrement du départ'}), 500
+        else:
+            flash('Erreur lors de l\'enregistrement du départ', 'error')
+            return redirect(url_for('student_movements.movements_index'))
+
+@bp.route('/transfer', methods=['POST'])
+@handle_db_errors
+def transfer_student():
+    """Transférer un élève d'une classe à une autre."""
+    temporal_repo = TemporalStudentRepository()
+    
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        student_id = int(data.get('student_id'))
+        new_class_group_id = int(data.get('new_class_group_id'))
+        transfer_date_str = data.get('transfer_date', str(date.today()))
+        transfer_reason = data.get('transfer_reason', '')
+        
+        # Validation de la date
+        transfer_date = datetime.strptime(transfer_date_str, '%Y-%m-%d').date()
+        
+        # Vérifier que l'élève et les classes existent
+        student = Student.query.get_or_404(student_id)
+        new_class_group = ClassGroup.query.get_or_404(new_class_group_id)
+        
+        # Effectuer le transfert
+        old_enrollment, new_enrollment = temporal_repo.transfer_student(
+            student_id, new_class_group_id, transfer_date, transfer_reason
+        )
+        db.session.commit()
+        
+        current_app.logger.info(f'Transfert effectué: Élève {student.full_name} vers {new_class_group.name}')
+        
+        if request.is_json:
+            return jsonify({
+                'success': True,
+                'message': f'Élève {student.full_name} transféré vers {new_class_group.name}',
+                'old_enrollment_id': old_enrollment.id,
+                'new_enrollment_id': new_enrollment.id
+            })
+        else:
+            flash(f'Élève {student.full_name} transféré vers {new_class_group.name}', 'success')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except ValueError as e:
+        error_msg = str(e)
+        current_app.logger.warning(f'Erreur transfert élève: {error_msg}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': error_msg}), 400
+        else:
+            flash(error_msg, 'error')
+            return redirect(url_for('student_movements.movements_index'))
+    
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur transfert élève: {e}')
+        
+        if request.is_json:
+            return jsonify({'success': False, 'error': 'Erreur lors du transfert'}), 500
+        else:
+            flash('Erreur lors du transfert', 'error')
+            return redirect(url_for('student_movements.movements_index'))
+
+@bp.route('/history/<int:student_id>')
+@handle_db_errors
+def student_history(student_id):
+    """Afficher l'historique des inscriptions d'un élève."""
+    temporal_repo = TemporalStudentRepository()
+    
+    student = Student.query.get_or_404(student_id)
+    enrollment_history = temporal_repo.get_enrollment_history(student_id)
+    
+    if request.is_json:
+        history_data = []
+        for enrollment in enrollment_history:
+            history_data.append({
+                'id': enrollment.id,
+                'class_name': enrollment.class_group.name,
+                'enrollment_date': enrollment.enrollment_date.isoformat(),
+                'departure_date': enrollment.departure_date.isoformat() if enrollment.departure_date else None,
+                'enrollment_reason': enrollment.enrollment_reason,
+                'departure_reason': enrollment.departure_reason,
+                'is_active': enrollment.is_active
+            })
+        
+        return jsonify({
+            'student': {
+                'id': student.id,
+                'name': student.full_name
+            },
+            'history': history_data
+        })
+    else:
+        return render_template('student_history.html',
+                             student=student,
+                             enrollment_history=enrollment_history)
+
+@bp.route('/api/eligible-students/<int:assessment_id>')
+@handle_db_errors
+def api_eligible_students(assessment_id):
+    """API pour récupérer les élèves éligibles pour une évaluation."""
+    from models import Assessment
+    temporal_repo = TemporalStudentRepository()
+    
+    assessment = Assessment.query.get_or_404(assessment_id)
+    eligible_students = temporal_repo.find_eligible_for_assessment(assessment)
+    current_students = temporal_repo.find_current_students_in_class(assessment.class_group_id)
+    
+    eligible_data = []
+    for student in eligible_students:
+        eligible_data.append({
+            'id': student.id,
+            'name': student.full_name,
+            'email': student.email,
+            'eligible': True
+        })
+    
+    # Ajouter les élèves non-éligibles pour comparaison
+    ineligible_students = [s for s in current_students if s not in eligible_students]
+    for student in ineligible_students:
+        eligible_data.append({
+            'id': student.id,
+            'name': student.full_name,
+            'email': student.email,
+            'eligible': False
+        })
+    
+    return jsonify({
+        'assessment': {
+            'id': assessment.id,
+            'title': assessment.title,
+            'date': assessment.date.isoformat() if assessment.date else None
+        },
+        'total_eligible': len(eligible_students),
+        'total_current': len(current_students),
+        'students': eligible_data
+    })
+
+@bp.route('/cancel-departure', methods=['POST'])
+@handle_db_errors
+def cancel_departure():
+    """Annuler le départ d'un élève (remettre inscription active)."""
+    try:
+        data = request.get_json() if request.is_json else request.form
+        
+        enrollment_id = int(data.get('enrollment_id'))
+        
+        # Récupérer l'inscription
+        enrollment = StudentEnrollment.query.get_or_404(enrollment_id)
+        
+        # Vérifier que l'inscription a bien une date de départ
+        if not enrollment.departure_date:
+            flash('Cette inscription n\'a pas de date de départ à annuler', 'error')
+            return redirect(request.referrer or url_for('student_movements.movements_index'))
+        
+        # Vérifier qu'il n'y a pas déjà une inscription active pour cet élève
+        active_enrollment = StudentEnrollment.query.filter_by(
+            student_id=enrollment.student_id,
+            departure_date=None
+        ).first()
+        
+        if active_enrollment:
+            flash(f'L\'élève {enrollment.student.first_name} {enrollment.student.last_name} est déjà inscrit dans {active_enrollment.class_group.name}', 'error')
+            return redirect(request.referrer or url_for('student_movements.movements_index'))
+        
+        # Annuler le départ en supprimant la date de départ
+        old_departure_date = enrollment.departure_date
+        enrollment.departure_date = None
+        enrollment.departure_reason = None
+        
+        db.session.commit()
+        
+        current_app.logger.info(f'Départ annulé - Élève {enrollment.student_id} réintégré en {enrollment.class_group.name}')
+        flash(f'Départ de {enrollment.student.first_name} {enrollment.student.last_name} annulé. Élève réintégré en {enrollment.class_group.name}', 'success')
+        
+        # Rediriger vers la page d'origine (page élèves de classe si disponible)
+        return redirect(request.referrer or url_for('student_movements.movements_index'))
+    
+    except (ValueError, TypeError) as e:
+        current_app.logger.error(f'Erreur données annulation départ: {e}')
+        flash('Données d\'annulation invalides', 'error')
+        return redirect(request.referrer or url_for('student_movements.movements_index'))
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f'Erreur annulation départ: {e}')
+        flash('Erreur lors de l\'annulation du départ', 'error')
+        return redirect(request.referrer or url_for('student_movements.movements_index'))

services/council_services.py

@@ -51,9 +51,14 @@ class StudentEvaluationService:
     
     def calculate_student_trimester_average(self, student_id: int, trimester: int) -> Optional[float]:
         """Calcule la moyenne d'un élève pour un trimestre donné."""
+        # Récupérer la classe actuelle de l'élève avec la logique temporelle
+        student = Student.query.get(student_id)
+        current_class = student.get_current_class()
+        if not current_class:
+            return None
+        
         assessments = self.assessment_repo.find_completed_by_class_trimester(
-            # On récupère d'abord la classe de l'élève
+            current_class.id, 
-            Student.query.get(student_id).class_group_id, 
             trimester
         )
         
@@ -74,10 +79,20 @@ class StudentEvaluationService:
     def get_student_trimester_summary(self, student_id: int, trimester: int) -> StudentTrimesterSummary:
         """Génère le résumé d'un élève pour un trimestre."""
         student = Student.query.get(student_id)
+        current_class = student.get_current_class()
+        if not current_class:
+            return StudentTrimesterSummary(
+                student=student,
+                overall_average=None,
+                assessment_count=0,
+                grades_by_assessment={},
+                appreciation=None,
+                performance_status='no_data'
+            )
         
         # Récupérer les évaluations du trimestre
         assessments = self.assessment_repo.find_by_class_trimester_with_details(
-            student.class_group_id, trimester
+            current_class.id, trimester
         )
         
         # Calculer les scores par évaluation
@@ -96,7 +111,7 @@ class StudentEvaluationService:
         # Récupérer l'appréciation existante
         appreciation_repo = AppreciationRepository()
         appreciation = appreciation_repo.find_by_student_trimester(
-            student_id, student.class_group_id, trimester
+            student_id, current_class.id, trimester
         )
         
         # Calculer les données de compétences et domaines
@@ -121,9 +136,10 @@ class StudentEvaluationService:
         )
     
     def get_students_summaries(self, class_group_id: int, trimester: int) -> List[StudentTrimesterSummary]:
-        """Génère les résumés de tous les élèves d'une classe pour un trimestre."""
+        """Génère les résumés de tous les élèves actuellement dans une classe pour un trimestre."""
-        student_repo = StudentRepository()
+        from repositories.temporal_student_repository import TemporalStudentRepository
-        students = student_repo.find_by_class_group(class_group_id)
+        temporal_repo = TemporalStudentRepository()
+        students = temporal_repo.find_current_students_in_class(class_group_id)
         
         summaries = []
         for student in students:
@@ -148,9 +164,13 @@ class StudentEvaluationService:
         if not student:
             return {'competences': [], 'domains': []}
         
-        # Récupérer toutes les évaluations du trimestre
+        # Récupérer la classe actuelle et toutes les évaluations du trimestre
+        current_class = student.get_current_class()
+        if not current_class:
+            return {'competences': [], 'domains': []}
+        
         assessments = self.assessment_repo.find_by_class_trimester_with_details(
-            student.class_group_id, trimester
+            current_class.id, trimester
         )
         
         # Structures pour accumuler les données
@@ -375,8 +395,18 @@ class StudentEvaluationService:
         global_details = self.grade_repo.get_special_values_details_by_student_trimester(student_id, trimester)
         
         # 2. Comptes par évaluation
+        student = Student.query.get(student_id)
+        current_class = student.get_current_class()
+        if not current_class:
+            return {
+                'global': {},
+                'by_assessment': {},
+                'total_special_values': 0,
+                'has_special_values': False
+            }
+        
         assessments = self.assessment_repo.find_by_class_trimester_with_details(
-            Student.query.get(student_id).class_group_id, trimester
+            current_class.id, trimester
         )
         
         by_assessment = {}

services/temporal_assessment_services.py

@@ -0,0 +1,207 @@
+from dataclasses import dataclass
+from typing import List, Dict, Tuple
+from collections import defaultdict
+from models import db, Grade, GradingElement, Exercise
+from repositories.temporal_student_repository import TemporalStudentRepository
+from services.assessment_services import AssessmentProgressService, StudentScoreCalculator, ProgressResult, StudentScore
+from providers.concrete_providers import SQLAlchemyDatabaseProvider
+from sqlalchemy import and_, func
+
+
+@dataclass
+class TemporalProgressResult(ProgressResult):
+    """Extension avec information temporelle."""
+    eligible_students_count: int
+    total_students_in_class: int
+
+
+class TemporalAssessmentProgressService(AssessmentProgressService):
+    """
+    Service de progression avec logique temporelle.
+    Hérite du service existant et ajoute la logique temporelle.
+    """
+    
+    def __init__(self, db_provider: SQLAlchemyDatabaseProvider, student_repo: TemporalStudentRepository):
+        super().__init__(db_provider)
+        self.student_repo = student_repo
+    
+    def calculate_grading_progress(self, assessment) -> TemporalProgressResult:
+        """
+        Calcule la progression en ne comptant que les élèves éligibles.
+        """
+        # Étudiants éligibles à la date de l'évaluation
+        eligible_students = self.student_repo.find_eligible_for_assessment(assessment)
+        current_students = self.student_repo.find_current_students_in_class(assessment.class_group_id)
+        
+        if not eligible_students:
+            return TemporalProgressResult(
+                percentage=0,
+                completed=0,
+                total=0,
+                status='no_eligible_students',
+                students_count=0,
+                eligible_students_count=0,
+                total_students_in_class=len(current_students)
+            )
+        
+        # Calcul basé uniquement sur les élèves éligibles
+        eligible_student_ids = [s.id for s in eligible_students]
+        
+        # Requête optimisée pour compter les notes des élèves éligibles uniquement
+        grading_elements_data = self._get_grading_elements_for_eligible_students(
+            assessment.id, eligible_student_ids
+        )
+        
+        total_elements = 0
+        completed_elements = 0
+        
+        for element_data in grading_elements_data:
+            total_elements += len(eligible_students)
+            completed_elements += element_data.completed_grades_count
+        
+        if total_elements == 0:
+            return TemporalProgressResult(
+                percentage=0,
+                completed=0,
+                total=0,
+                status='no_elements',
+                students_count=len(eligible_students),
+                eligible_students_count=len(eligible_students),
+                total_students_in_class=len(current_students)
+            )
+        
+        percentage = round((completed_elements / total_elements) * 100)
+        status = self._determine_status(percentage)
+        
+        return TemporalProgressResult(
+            percentage=percentage,
+            completed=completed_elements,
+            total=total_elements,
+            status=status,
+            students_count=len(eligible_students),
+            eligible_students_count=len(eligible_students),
+            total_students_in_class=len(current_students)
+        )
+    
+    def _get_grading_elements_for_eligible_students(self, assessment_id: int, eligible_student_ids: List[int]):
+        """Requête optimisée pour récupérer les notes des élèves éligibles."""
+        
+        return db.session.query(
+            GradingElement.id,
+            func.count(Grade.id).label('completed_grades_count')
+        ).select_from(GradingElement)\
+        .join(Exercise, GradingElement.exercise_id == Exercise.id)\
+        .outerjoin(
+            Grade, 
+            and_(
+                Grade.grading_element_id == GradingElement.id,
+                Grade.student_id.in_(eligible_student_ids),
+                Grade.value.isnot(None),
+                Grade.value != ''
+            )
+        )\
+        .filter(Exercise.assessment_id == assessment_id)\
+        .group_by(GradingElement.id)\
+        .all()
+
+
+class TemporalStudentScoreCalculator(StudentScoreCalculator):
+    """Calculateur de scores avec logique temporelle."""
+    
+    def __init__(self, 
+                 grading_calculator,
+                 db_provider: SQLAlchemyDatabaseProvider,
+                 student_repo: TemporalStudentRepository):
+        super().__init__(grading_calculator, db_provider)
+        self.student_repo = student_repo
+    
+    def calculate_student_scores(self, assessment) -> Tuple[Dict[int, StudentScore], Dict[int, Dict[int, float]]]:
+        """
+        Calcule les scores uniquement pour les élèves éligibles.
+        """
+        # Récupérer uniquement les élèves éligibles
+        eligible_students = self.student_repo.find_eligible_for_assessment(assessment)
+        
+        if not eligible_students:
+            return {}, {}
+        
+        # Requête optimisée pour les notes des élèves éligibles
+        eligible_student_ids = [s.id for s in eligible_students]
+        grades_data = self._get_grades_for_eligible_students(assessment.id, eligible_student_ids)
+        
+        students_scores = {}
+        exercise_scores = defaultdict(lambda: defaultdict(float))
+        
+        # Calcul pour chaque élève éligible
+        for student in eligible_students:
+            student_score = self._calculate_single_student_score(
+                student, assessment, grades_data
+            )
+            students_scores[student.id] = student_score
+            
+            for exercise_id, exercise_data in student_score.exercises.items():
+                exercise_scores[exercise_id][student.id] = exercise_data['score']
+        
+        return students_scores, dict(exercise_scores)
+    
+    def _get_grades_for_eligible_students(self, assessment_id: int, eligible_student_ids: List[int]):
+        """Requête optimisée pour les notes des élèves éligibles."""
+        
+        grades = db.session.query(Grade)\
+            .join(GradingElement, Grade.grading_element_id == GradingElement.id)\
+            .join(Exercise, GradingElement.exercise_id == Exercise.id)\
+            .filter(
+                Exercise.assessment_id == assessment_id,
+                Grade.student_id.in_(eligible_student_ids)
+            ).all()
+        
+        # Convertir en format dict compatible avec le service parent
+        return [
+            {
+                'student_id': grade.student_id,
+                'grading_element_id': grade.grading_element_id,
+                'value': grade.value,
+                'grading_type': grade.grading_element.grading_type,
+                'max_points': grade.grading_element.max_points
+            }
+            for grade in grades
+        ]
+
+
+class TemporalClassStatisticsService:
+    """Service pour calculer les statistiques de classe avec logique temporelle."""
+    
+    def __init__(self, student_repo: TemporalStudentRepository):
+        self.student_repo = student_repo
+    
+    def get_class_enrollment_summary(self, class_group_id: int, trimester: int = None):
+        """Résumé des inscriptions pour une classe."""
+        current_students = self.student_repo.find_current_students_in_class(class_group_id)
+        
+        # Calcul des mouvements si on a un trimestre spécifique
+        movements = {}
+        if trimester:
+            from datetime import date
+            # Approximation des dates de trimestre
+            trimester_dates = {
+                1: (date(2024, 9, 1), date(2024, 12, 31)),
+                2: (date(2025, 1, 1), date(2025, 3, 31)),
+                3: (date(2025, 4, 1), date(2025, 6, 30))
+            }
+            
+            if trimester in trimester_dates:
+                start_date, end_date = trimester_dates[trimester]
+                students_with_movements = self.student_repo.find_students_with_movements_in_period(
+                    start_date, end_date
+                )
+                movements = {
+                    'arrivals': [],
+                    'departures': [],
+                    'total_movements': len(students_with_movements)
+                }
+        
+        return {
+            'current_count': len(current_students),
+            'current_students': current_students,
+            'movements': movements
+        }

services/temporal_facade.py

@@ -0,0 +1,70 @@
+from typing import List
+from models import Student
+from repositories.temporal_student_repository import TemporalStudentRepository
+from services.temporal_assessment_services import (
+    TemporalAssessmentProgressService, 
+    TemporalStudentScoreCalculator,
+    TemporalClassStatisticsService,
+    TemporalProgressResult
+)
+from services.assessment_services import AssessmentStatisticsService, UnifiedGradingCalculator
+from providers.concrete_providers import ConfigManagerProvider, SQLAlchemyDatabaseProvider
+
+
+class TemporalAssessmentServicesFacade:
+    """
+    Facade temporelle qui remplace la facade standard.
+    Intègre toute la logique temporelle de manière transparente.
+    """
+    
+    def __init__(self, 
+                 config_provider = None,
+                 db_provider = None):
+        # Injection des repositories temporels
+        self.student_repo = TemporalStudentRepository()
+        
+        # Providers par défaut si non fournis
+        if config_provider is None:
+            config_provider = ConfigManagerProvider()
+        if db_provider is None:
+            db_provider = SQLAlchemyDatabaseProvider()
+        
+        # Services temporels
+        self.grading_calculator = UnifiedGradingCalculator(config_provider)
+        self.progress_service = TemporalAssessmentProgressService(db_provider, self.student_repo)
+        self.score_calculator = TemporalStudentScoreCalculator(
+            self.grading_calculator, db_provider, self.student_repo
+        )
+        self.statistics_service = AssessmentStatisticsService(self.score_calculator)
+        self.class_statistics_service = TemporalClassStatisticsService(self.student_repo)
+    
+    def get_eligible_students(self, assessment) -> List[Student]:
+        """Nouvelle méthode pour récupérer les élèves éligibles."""
+        return self.student_repo.find_eligible_for_assessment(assessment)
+    
+    def get_grading_progress(self, assessment) -> TemporalProgressResult:
+        """Progression avec logique temporelle."""
+        return self.progress_service.calculate_grading_progress(assessment)
+    
+    def get_class_enrollment_summary(self, class_group_id: int, trimester: int = None):
+        """Résumé des inscriptions pour une classe."""
+        return self.class_statistics_service.get_class_enrollment_summary(class_group_id, trimester)
+    
+    # Compatibilité avec l'interface existante
+    def get_assessment_statistics(self, assessment):
+        """Statistiques d'évaluation (héritée du service existant)."""
+        return self.statistics_service.get_assessment_statistics(assessment)
+
+
+class TemporalAssessmentServicesFactory:
+    """Factory pour créer les services temporels."""
+    
+    @staticmethod
+    def create_temporal_facade(config_provider = None) -> TemporalAssessmentServicesFacade:
+        """Crée une facade temporelle."""
+        return TemporalAssessmentServicesFacade(config_provider)
+    
+    @staticmethod
+    def create_temporal_student_repository() -> TemporalStudentRepository:
+        """Crée un repository d'élèves temporel."""
+        return TemporalStudentRepository()

templates/class_dashboard.html

@@ -92,7 +92,7 @@
         </a>
 
         {# Action BLEUE - Gérer les élèves #}
-        <a href="{{ url_for('students') }}?class_id={{ class_group.id }}" 
+        <a href="{{ url_for('classes.students', id=class_group.id) }}" 
            class="group bg-gradient-to-r from-blue-500 to-blue-600 text-white rounded-xl p-6 hover:from-blue-600 hover:to-blue-700 transition-all duration-300 transform hover:scale-[1.02] shadow-lg hover:shadow-xl">
             <div class="flex items-center">
                 <div class="w-12 h-12 bg-white/20 rounded-xl flex items-center justify-center mr-4 group-hover:bg-white/30 transition-colors">
@@ -102,7 +102,7 @@
                 </div>
                 <div>
                     <h3 class="text-lg font-bold mb-1">Gérer élèves</h3>
-                    <p class="text-sm opacity-90">{{ class_group.students|length }} élèves inscrits</p>
+                    <p class="text-sm opacity-90">{% if class_group._current_students %}{{ class_group._current_students|length }}{% else %}{{ class_group.students|length }}{% endif %} élèves inscrits</p>
                 </div>
             </div>
         </a>
@@ -410,7 +410,7 @@
                             Effectif complet : {{ class_group.students|length }} élèves
                         </span>
                     </div>
-                    <a href="{{ url_for('students') }}?class_id={{ class_group.id }}" 
+                    <a href="{{ url_for('classes.students', id=class_group.id) }}" 
                        class="inline-flex items-center text-sm bg-gradient-to-r from-blue-500 to-blue-600 hover:from-blue-600 hover:to-blue-700 text-white px-4 py-2 rounded-lg transition-all duration-300 font-semibold shadow-lg hover:shadow-xl transform hover:scale-[1.02]">
                         <svg class="w-4 h-4 mr-2" fill="currentColor" viewBox="0 0 20 20">
                             <path d="M10 9a3 3 0 100-6 3 3 0 000 6zm-7 9a7 7 0 1114 0H3z"/>
@@ -427,7 +427,7 @@
                     </div>
                     <h3 class="text-sm font-medium text-gray-900 mb-2">Aucun élève inscrit</h3>
                     <p class="text-sm text-gray-500 mb-4">Ajoutez des élèves à cette classe pour commencer les évaluations</p>
-                    <a href="{{ url_for('students') }}?class_id={{ class_group.id }}" 
+                    <a href="{{ url_for('classes.students', id=class_group.id) }}" 
                        class="inline-flex items-center text-sm bg-gradient-to-r from-green-500 to-green-600 hover:from-green-600 hover:to-green-700 text-white px-4 py-2 rounded-lg transition-all duration-300 font-semibold shadow-lg hover:shadow-xl transform hover:scale-[1.02]">
                         <svg class="w-4 h-4 mr-2" fill="currentColor" viewBox="0 0 20 20">
                             <path fill-rule="evenodd" d="M10 3a1 1 0 011 1v5h5a1 1 0 110 2h-5v5a1 1 0 11-2 0v-5H4a1 1 0 110-2h5V4a1 1 0 011-1z" clip-rule="evenodd"/>

templates/class_students.html

@@ -0,0 +1,608 @@
+{% extends "base.html" %}
+{% from 'components/common/macros.html' import hero_section %}
+
+{% block title %}Élèves de {{ class_group.name }} - Gestion Scolaire{% endblock %}
+
+{% block content %}
+<div class="space-y-6">
+    {# Hero Section avec Statistiques des Élèves #}
+    {% set meta_info = [
+        {
+            'icon': '<svg class="w-4 h-4 mr-2" fill="currentColor" viewBox="0 0 20 20"><path d="M10 9a3 3 0 100-6 3 3 0 000 6zm-7 9a7 7 0 1114 0H3z"/></svg>',
+            'text': stats.total_current ~ ' élèves actuels'
+        },
+        {
+            'icon': '<svg class="w-4 h-4 mr-2" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 3a1 1 0 011 1v5h5a1 1 0 110 2h-5v5a1 1 0 11-2 0v-5H4a1 1 0 110-2h5V4a1 1 0 011-1z" clip-rule="evenodd"/></svg>',
+            'text': stats.recent_arrivals ~ ' arrivées (30j)'
+        },
+        {
+            'icon': '<svg class="w-4 h-4 mr-2" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M3 10a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1z" clip-rule="evenodd"/></svg>',
+            'text': stats.recent_departures ~ ' départs (30j)'
+        }
+    ] %}
+
+    {% set primary_action = {
+        'url': 'javascript:openEnrollModal()',
+        'text': 'Inscrire un élève',
+        'icon': '<svg class="w-5 h-5" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M10 3a1 1 0 011 1v5h5a1 1 0 110 2h-5v5a1 1 0 11-2 0v-5H4a1 1 0 110-2h5V4a1 1 0 011-1z" clip-rule="evenodd"/></svg>'
+    } %}
+
+    {{ hero_section(
+        title=class_group.name ~ " 👥",
+        subtitle="Gestion des élèves",
+        meta_info=meta_info,
+        primary_action=primary_action,
+        gradient_class="from-blue-500 to-blue-600"
+    ) }}
+
+    {# Breadcrumb Navigation #}
+    <div class="flex items-center text-sm text-gray-600">
+        <a href="{{ url_for('classes.dashboard', id=class_group.id) }}" 
+           class="hover:text-blue-600 transition-colors flex items-center">
+            <svg class="w-4 h-4 mr-1" fill="currentColor" viewBox="0 0 20 20">
+                <path fill-rule="evenodd" d="M12.707 5.293a1 1 0 010 1.414L9.414 10l3.293 3.293a1 1 0 01-1.414 1.414l-4-4a1 1 0 010-1.414l4-4a1 1 0 011.414 0z" clip-rule="evenodd"/>
+            </svg>
+            Retour au dashboard
+        </a>
+    </div>
+
+    {# Statistiques d'effectifs #}
+    <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
+        <div class="bg-gradient-to-r from-blue-500 to-blue-600 text-white rounded-xl p-6">
+            <div class="flex items-center">
+                <div class="w-12 h-12 bg-white/20 rounded-xl flex items-center justify-center mr-4">
+                    <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                        <path d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
+                    </svg>
+                </div>
+                <div>
+                    <h3 class="text-2xl font-bold">{{ stats.total_current }}</h3>
+                    <p class="text-sm opacity-90">Élèves actuels</p>
+                </div>
+            </div>
+        </div>
+        
+        <div class="bg-gradient-to-r from-green-500 to-green-600 text-white rounded-xl p-6">
+            <div class="flex items-center">
+                <div class="w-12 h-12 bg-white/20 rounded-xl flex items-center justify-center mr-4">
+                    <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                        <path fill-rule="evenodd" d="M10 3a1 1 0 011 1v5h5a1 1 0 110 2h-5v5a1 1 0 11-2 0v-5H4a1 1 0 110-2h5V4a1 1 0 011-1z" clip-rule="evenodd"/>
+                    </svg>
+                </div>
+                <div>
+                    <h3 class="text-2xl font-bold">{{ stats.recent_arrivals }}</h3>
+                    <p class="text-sm opacity-90">Arrivées (30j)</p>
+                </div>
+            </div>
+        </div>
+        
+        <div class="bg-gradient-to-r from-orange-500 to-orange-600 text-white rounded-xl p-6">
+            <div class="flex items-center">
+                <div class="w-12 h-12 bg-white/20 rounded-xl flex items-center justify-center mr-4">
+                    <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                        <path fill-rule="evenodd" d="M3 10a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1z" clip-rule="evenodd"/>
+                    </svg>
+                </div>
+                <div>
+                    <h3 class="text-2xl font-bold">{{ stats.recent_departures }}</h3>
+                    <p class="text-sm opacity-90">Départs (30j)</p>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    {# Liste des élèves actuels #}
+    <div class="bg-white shadow rounded-lg">
+        <div class="px-6 py-4 border-b border-gray-200">
+            <h2 class="text-xl font-semibold text-gray-900 flex items-center">
+                <svg class="w-6 h-6 mr-2 text-blue-600" fill="currentColor" viewBox="0 0 20 20">
+                    <path d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
+                </svg>
+                Élèves actuellement inscrits ({{ current_students|length }})
+            </h2>
+        </div>
+        
+        {% if current_students %}
+            <div class="divide-y divide-gray-200">
+                {% for student in current_students %}
+                    {% set enrollment = student.get_current_enrollment() %}
+                    <div class="px-6 py-4 flex items-center justify-between hover:bg-gray-50">
+                        <div class="flex items-center">
+                            <div class="w-10 h-10 bg-blue-100 rounded-full flex items-center justify-center mr-4">
+                                <span class="text-sm font-medium text-blue-600">{{ student.first_name[0] }}{{ student.last_name[0] }}</span>
+                            </div>
+                            <div>
+                                <div class="text-lg font-medium text-gray-900">{{ student.first_name }} {{ student.last_name }}</div>
+                                <div class="text-sm text-gray-500">
+                                    {% if enrollment %}
+                                        Inscrit depuis le {{ enrollment.enrollment_date.strftime('%d/%m/%Y') }}
+                                        {% if enrollment.enrollment_reason %}
+                                            ({{ enrollment.enrollment_reason }})
+                                        {% endif %}
+                                    {% endif %}
+                                </div>
+                            </div>
+                        </div>
+                        
+                        <div class="flex space-x-2">
+                            <button onclick="transferStudent({{ student.id }}, '{{ student.first_name }} {{ student.last_name }}')" 
+                                    class="bg-blue-100 hover:bg-blue-200 text-blue-700 px-3 py-1 rounded text-sm transition-colors">
+                                Transférer
+                            </button>
+                            <button onclick="departureStudent({{ student.id }}, '{{ student.first_name }} {{ student.last_name }}')" 
+                                    class="bg-orange-100 hover:bg-orange-200 text-orange-700 px-3 py-1 rounded text-sm transition-colors">
+                                Départ
+                            </button>
+                        </div>
+                    </div>
+                {% endfor %}
+            </div>
+        {% else %}
+            <div class="px-6 py-8 text-center text-gray-500">
+                <svg class="w-12 h-12 mx-auto mb-4 text-gray-300" fill="currentColor" viewBox="0 0 20 20">
+                    <path d="M10 9a3 3 0 100-6 3 3 0 000 6zm-7 9a7 7 0 1114 0H3z"/>
+                </svg>
+                <p>Aucun élève inscrit dans cette classe</p>
+            </div>
+        {% endif %}
+    </div>
+
+    {# Historique des mouvements #}
+    {% if class_movements %}
+        <div class="bg-white shadow rounded-lg">
+            <div class="px-6 py-4 border-b border-gray-200">
+                <h2 class="text-xl font-semibold text-gray-900 flex items-center">
+                    <svg class="w-6 h-6 mr-2 text-gray-600" fill="currentColor" viewBox="0 0 20 20">
+                        <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z" clip-rule="evenodd"/>
+                    </svg>
+                    Historique des mouvements (6 derniers mois)
+                </h2>
+            </div>
+            
+            <div class="divide-y divide-gray-200">
+                {% for student, enrollments in class_movements %}
+                    <div class="px-6 py-4">
+                        <div class="flex items-center justify-between mb-2">
+                            <span class="font-medium text-gray-900">{{ student.first_name }} {{ student.last_name }}</span>
+                        </div>
+                        
+                        <div class="space-y-1">
+                            {% for enrollment in enrollments %}
+                                <div class="flex items-center justify-between text-sm">
+                                    <div class="flex items-center">
+                                        {% if enrollment.departure_date %}
+                                            <span class="inline-flex items-center px-2 py-1 rounded-full text-xs font-medium bg-orange-100 text-orange-800 mr-2">
+                                                Départ
+                                            </span>
+                                            <span class="text-gray-600">
+                                                Du {{ enrollment.enrollment_date.strftime('%d/%m/%Y') }} au {{ enrollment.departure_date.strftime('%d/%m/%Y') }}
+                                                {% if enrollment.departure_reason %}
+                                                    - {{ enrollment.departure_reason }}
+                                                {% endif %}
+                                            </span>
+                                        {% else %}
+                                            <span class="inline-flex items-center px-2 py-1 rounded-full text-xs font-medium bg-green-100 text-green-800 mr-2">
+                                                Arrivée
+                                            </span>
+                                            <span class="text-gray-600">
+                                                Depuis le {{ enrollment.enrollment_date.strftime('%d/%m/%Y') }}
+                                                {% if enrollment.enrollment_reason %}
+                                                    - {{ enrollment.enrollment_reason }}
+                                                {% endif %}
+                                            </span>
+                                        {% endif %}
+                                    </div>
+                                    
+                                    {% if enrollment.departure_date %}
+                                        <button onclick="cancelDeparture({{ enrollment.id }}, '{{ student.first_name }} {{ student.last_name }}')"
+                                                class="bg-green-100 hover:bg-green-200 text-green-700 px-2 py-1 rounded text-xs transition-colors">
+                                            Annuler le départ
+                                        </button>
+                                    {% endif %}
+                                </div>
+                            {% endfor %}
+                        </div>
+                    </div>
+                {% endfor %}
+            </div>
+        </div>
+    {% endif %}
+</div>
+
+{# Modal d'inscription d'élève #}
+<div id="enrollModal" class="fixed inset-0 bg-gray-600 bg-opacity-50 hidden items-center justify-center z-50">
+    <div class="bg-white rounded-lg p-6 max-w-md w-full mx-4">
+        <div class="flex items-center justify-between mb-4">
+            <h3 class="text-lg font-semibold">Inscrire un élève dans {{ class_group.name }}</h3>
+            <button type="button" onclick="closeEnrollModal()" 
+                    class="text-gray-400 hover:text-gray-600 transition-colors">
+                <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                    <path fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"/>
+                </svg>
+            </button>
+        </div>
+        
+        {# Tabs pour choisir le mode #}
+        <div class="flex mb-4 border-b border-gray-200">
+            <button type="button" id="newStudentTab" 
+                    class="px-4 py-2 text-sm font-medium text-blue-600 border-b-2 border-blue-600"
+                    onclick="switchEnrollMode('new')">
+                Nouvel élève
+            </button>
+            <button type="button" id="existingStudentTab" 
+                    class="px-4 py-2 text-sm font-medium text-gray-500 border-b-2 border-transparent"
+                    onclick="switchEnrollMode('existing')">
+                Élève existant
+            </button>
+        </div>
+        
+        <form id="enrollForm" method="post" action="{{ url_for('classes.enroll_student') }}">
+            <input type="hidden" name="class_id" value="{{ class_group.id }}">
+            <input type="hidden" name="mode" id="enrollMode" value="new">
+            
+            {# Mode élève existant #}
+            <div id="existingStudentFields" class="hidden">
+                <div class="mb-4">
+                    <label for="student_id" class="block text-sm font-medium text-gray-700 mb-2">Élève</label>
+                    <select name="student_id" id="student_id"
+                            class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+                        <option value="">Sélectionner un élève</option>
+                        {% for student in available_students %}
+                            <option value="{{ student.id }}">
+                                {{ student.first_name }} {{ student.last_name }}
+                                {% set current_class = student.get_current_class() %}
+                                {% if current_class %}
+                                    (actuellement en {{ current_class.name }})
+                                {% else %}
+                                    (non inscrit)
+                                {% endif %}
+                            </option>
+                        {% endfor %}
+                    </select>
+                </div>
+            </div>
+            
+            {# Mode nouvel élève #}
+            <div id="newStudentFields">
+                <div class="grid grid-cols-2 gap-4 mb-4">
+                    <div>
+                        <label for="new_first_name" class="block text-sm font-medium text-gray-700 mb-2">Prénom</label>
+                        <input type="text" name="new_first_name" id="new_first_name" 
+                               class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+                    </div>
+                    <div>
+                        <label for="new_last_name" class="block text-sm font-medium text-gray-700 mb-2">Nom</label>
+                        <input type="text" name="new_last_name" id="new_last_name" 
+                               class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+                    </div>
+                </div>
+                <div class="mb-4">
+                    <label for="new_email" class="block text-sm font-medium text-gray-700 mb-2">Email (optionnel)</label>
+                    <input type="email" name="new_email" id="new_email" 
+                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+                </div>
+            </div>
+            
+            <div class="mb-4">
+                <label for="enrollment_date" class="block text-sm font-medium text-gray-700 mb-2">Date d'inscription</label>
+                <input type="date" name="enrollment_date" id="enrollment_date" required
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="mb-6">
+                <label for="enrollment_reason" class="block text-sm font-medium text-gray-700 mb-2">Motif (optionnel)</label>
+                <input type="text" name="enrollment_reason" id="enrollment_reason" 
+                       placeholder="Ex: Nouvelle inscription, Transfert d'établissement..."
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="flex justify-end space-x-3">
+                <button type="button" onclick="closeEnrollModal()" 
+                        class="px-4 py-2 text-gray-600 hover:text-gray-800 transition-colors">
+                    Annuler
+                </button>
+                <button type="submit" 
+                        class="bg-green-600 hover:bg-green-700 text-white px-4 py-2 rounded-md transition-colors">
+                    Inscrire
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
+{# Modal de transfert #}
+<div id="transferModal" class="fixed inset-0 bg-gray-600 bg-opacity-50 hidden items-center justify-center z-50">
+    <div class="bg-white rounded-lg p-6 max-w-md w-full mx-4">
+        <div class="flex items-center justify-between mb-4">
+            <h3 class="text-lg font-semibold">Transférer <span id="transferStudentName"></span></h3>
+            <button type="button" onclick="closeTransferModal()" 
+                    class="text-gray-400 hover:text-gray-600 transition-colors">
+                <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                    <path fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"/>
+                </svg>
+            </button>
+        </div>
+        
+        <form id="transferForm" method="post" action="{{ url_for('classes.transfer_student') }}">
+            <input type="hidden" name="student_id" id="transferStudentId">
+            
+            <div class="mb-4">
+                <label for="new_class_id" class="block text-sm font-medium text-gray-700 mb-2">Nouvelle classe</label>
+                <select name="new_class_id" id="new_class_id" required 
+                        class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+                    <option value="">Sélectionner une classe</option>
+                    {% for class in other_classes %}
+                        <option value="{{ class.id }}">{{ class.name }}</option>
+                    {% endfor %}
+                </select>
+            </div>
+            
+            <div class="mb-4">
+                <label for="transfer_date" class="block text-sm font-medium text-gray-700 mb-2">Date de transfert</label>
+                <input type="date" name="transfer_date" id="transfer_date" required
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="mb-6">
+                <label for="transfer_reason" class="block text-sm font-medium text-gray-700 mb-2">Motif (optionnel)</label>
+                <input type="text" name="transfer_reason" id="transfer_reason" 
+                       placeholder="Ex: Changement de niveau, Réorientation..."
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="flex justify-end space-x-3">
+                <button type="button" onclick="closeTransferModal()" 
+                        class="px-4 py-2 text-gray-600 hover:text-gray-800 transition-colors">
+                    Annuler
+                </button>
+                <button type="submit" 
+                        class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-md transition-colors">
+                    Transférer
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
+{# Modal de départ #}
+<div id="departureModal" class="fixed inset-0 bg-gray-600 bg-opacity-50 hidden items-center justify-center z-50">
+    <div class="bg-white rounded-lg p-6 max-w-md w-full mx-4">
+        <div class="flex items-center justify-between mb-4">
+            <h3 class="text-lg font-semibold">Marquer le départ de <span id="departureStudentName"></span></h3>
+            <button type="button" onclick="closeDepartureModal()" 
+                    class="text-gray-400 hover:text-gray-600 transition-colors">
+                <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                    <path fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"/>
+                </svg>
+            </button>
+        </div>
+        
+        <form id="departureForm" method="post" action="{{ url_for('classes.student_departure') }}">
+            <input type="hidden" name="student_id" id="departureStudentId">
+            
+            <div class="mb-4">
+                <label for="departure_date" class="block text-sm font-medium text-gray-700 mb-2">Date de départ</label>
+                <input type="date" name="departure_date" id="departure_date" required
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="mb-6">
+                <label for="departure_reason" class="block text-sm font-medium text-gray-700 mb-2">Motif (optionnel)</label>
+                <input type="text" name="departure_reason" id="departure_reason" 
+                       placeholder="Ex: Fin de scolarité, Déménagement, Changement d'établissement..."
+                       class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500">
+            </div>
+            
+            <div class="flex justify-end space-x-3">
+                <button type="button" onclick="closeDepartureModal()" 
+                        class="px-4 py-2 text-gray-600 hover:text-gray-800 transition-colors">
+                    Annuler
+                </button>
+                <button type="submit" 
+                        class="bg-orange-600 hover:bg-orange-700 text-white px-4 py-2 rounded-md transition-colors">
+                    Confirmer le départ
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
+{# Modal de confirmation d'annulation de départ #}
+<div id="cancelDepartureModal" class="fixed inset-0 bg-gray-600 bg-opacity-50 hidden items-center justify-center z-50">
+    <div class="bg-white rounded-lg p-6 max-w-md w-full mx-4">
+        <div class="flex items-center justify-between mb-4">
+            <h3 class="text-lg font-semibold">Annuler le départ de <span id="cancelDepartureStudentName"></span></h3>
+            <button type="button" onclick="closeCancelDepartureModal()" 
+                    class="text-gray-400 hover:text-gray-600 transition-colors">
+                <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
+                    <path fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"/>
+                </svg>
+            </button>
+        </div>
+        
+        <div class="mb-6">
+            <div class="bg-yellow-50 border border-yellow-200 rounded-lg p-4">
+                <div class="flex">
+                    <div class="flex-shrink-0">
+                        <svg class="h-5 w-5 text-yellow-400" fill="currentColor" viewBox="0 0 20 20">
+                            <path fill-rule="evenodd" d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z" clip-rule="evenodd"/>
+                        </svg>
+                    </div>
+                    <div class="ml-3">
+                        <h4 class="text-sm font-medium text-yellow-800">Attention</h4>
+                        <p class="text-sm text-yellow-700 mt-1">
+                            Cette action va réintégrer l'élève dans la classe et supprimer la date de départ. 
+                            L'élève redeviendra éligible pour les futures évaluations de cette classe.
+                        </p>
+                    </div>
+                </div>
+            </div>
+        </div>
+        
+        <form id="cancelDepartureForm" method="post" action="{{ url_for('classes.cancel_departure') }}">
+            <input type="hidden" name="enrollment_id" id="cancelDepartureEnrollmentId">
+            
+            <div class="flex justify-end space-x-3">
+                <button type="button" onclick="closeCancelDepartureModal()" 
+                        class="px-4 py-2 text-gray-600 hover:text-gray-800 transition-colors">
+                    Annuler
+                </button>
+                <button type="submit" 
+                        class="bg-green-600 hover:bg-green-700 text-white px-4 py-2 rounded-md transition-colors">
+                    Confirmer l'annulation
+                </button>
+            </div>
+        </form>
+    </div>
+</div>
+
+<script>
+// Initialiser la date d'aujourd'hui dans les champs de date
+document.addEventListener('DOMContentLoaded', function() {
+    const today = new Date().toISOString().split('T')[0];
+    document.getElementById('enrollment_date').value = today;
+    document.getElementById('transfer_date').value = today;
+    document.getElementById('departure_date').value = today;
+    
+    // Vérifier s'il y a eu un rechargement après inscription
+    const urlParams = new URLSearchParams(window.location.search);
+    if (urlParams.has('reload')) {
+        // Supprimer le paramètre de l'URL pour éviter le rechargement en boucle
+        const newUrl = window.location.pathname;
+        window.history.replaceState({}, document.title, newUrl);
+        
+        // Faire défiler vers le haut pour voir le message de succès
+        window.scrollTo(0, 0);
+    }
+});
+
+// Gestion des modals d'inscription
+function openEnrollModal() {
+    document.getElementById('enrollModal').classList.remove('hidden');
+    document.getElementById('enrollModal').classList.add('flex');
+    // Réinitialiser au mode "nouvel élève" par défaut
+    switchEnrollMode('new');
+}
+
+function closeEnrollModal() {
+    document.getElementById('enrollModal').classList.add('hidden');
+    document.getElementById('enrollModal').classList.remove('flex');
+    // Réinitialiser le formulaire
+    document.getElementById('enrollForm').reset();
+    const today = new Date().toISOString().split('T')[0];
+    document.getElementById('enrollment_date').value = today;
+}
+
+// Gestion du changement de mode d'inscription
+function switchEnrollMode(mode) {
+    const existingTab = document.getElementById('existingStudentTab');
+    const newTab = document.getElementById('newStudentTab');
+    const existingFields = document.getElementById('existingStudentFields');
+    const newFields = document.getElementById('newStudentFields');
+    const modeInput = document.getElementById('enrollMode');
+    
+    if (mode === 'existing') {
+        // Activer l'onglet "Élève existant"
+        existingTab.classList.add('text-blue-600', 'border-blue-600');
+        existingTab.classList.remove('text-gray-500', 'border-transparent');
+        newTab.classList.add('text-gray-500', 'border-transparent');
+        newTab.classList.remove('text-blue-600', 'border-blue-600');
+        
+        // Afficher les champs correspondants
+        existingFields.classList.remove('hidden');
+        newFields.classList.add('hidden');
+        
+        // Mettre à jour le mode
+        modeInput.value = 'existing';
+        
+        // Rendre student_id requis
+        document.getElementById('student_id').required = true;
+        document.getElementById('new_first_name').required = false;
+        document.getElementById('new_last_name').required = false;
+    } else {
+        // Activer l'onglet "Nouvel élève"
+        newTab.classList.add('text-blue-600', 'border-blue-600');
+        newTab.classList.remove('text-gray-500', 'border-transparent');
+        existingTab.classList.add('text-gray-500', 'border-transparent');
+        existingTab.classList.remove('text-blue-600', 'border-blue-600');
+        
+        // Afficher les champs correspondants
+        newFields.classList.remove('hidden');
+        existingFields.classList.add('hidden');
+        
+        // Mettre à jour le mode
+        modeInput.value = 'new';
+        
+        // Rendre les champs du nouvel élève requis
+        document.getElementById('student_id').required = false;
+        document.getElementById('new_first_name').required = true;
+        document.getElementById('new_last_name').required = true;
+    }
+}
+
+// Gestion des modals de transfert
+function transferStudent(studentId, studentName) {
+    document.getElementById('transferStudentId').value = studentId;
+    document.getElementById('transferStudentName').textContent = studentName;
+    document.getElementById('transferModal').classList.remove('hidden');
+    document.getElementById('transferModal').classList.add('flex');
+}
+
+function closeTransferModal() {
+    document.getElementById('transferModal').classList.add('hidden');
+    document.getElementById('transferModal').classList.remove('flex');
+}
+
+// Gestion des modals de départ
+function departureStudent(studentId, studentName) {
+    document.getElementById('departureStudentId').value = studentId;
+    document.getElementById('departureStudentName').textContent = studentName;
+    document.getElementById('departureModal').classList.remove('hidden');
+    document.getElementById('departureModal').classList.add('flex');
+}
+
+function closeDepartureModal() {
+    document.getElementById('departureModal').classList.add('hidden');
+    document.getElementById('departureModal').classList.remove('flex');
+}
+
+// Gestion des modals d'annulation de départ
+function cancelDeparture(enrollmentId, studentName) {
+    document.getElementById('cancelDepartureEnrollmentId').value = enrollmentId;
+    document.getElementById('cancelDepartureStudentName').textContent = studentName;
+    document.getElementById('cancelDepartureModal').classList.remove('hidden');
+    document.getElementById('cancelDepartureModal').classList.add('flex');
+}
+
+function closeCancelDepartureModal() {
+    document.getElementById('cancelDepartureModal').classList.add('hidden');
+    document.getElementById('cancelDepartureModal').classList.remove('flex');
+}
+
+// Fermer les modals en cliquant à l'extérieur
+document.addEventListener('click', function(event) {
+    const modals = ['enrollModal', 'transferModal', 'departureModal', 'cancelDepartureModal'];
+    modals.forEach(modalId => {
+        const modal = document.getElementById(modalId);
+        if (event.target === modal) {
+            modal.classList.add('hidden');
+            modal.classList.remove('flex');
+        }
+    });
+});
+
+// Fermer les modals avec la touche Échap
+document.addEventListener('keydown', function(event) {
+    if (event.key === 'Escape') {
+        const modals = ['enrollModal', 'transferModal', 'departureModal', 'cancelDepartureModal'];
+        modals.forEach(modalId => {
+            const modal = document.getElementById(modalId);
+            if (modal && !modal.classList.contains('hidden')) {
+                modal.classList.add('hidden');
+                modal.classList.remove('flex');
+            }
+        });
+    }
+});
+</script>
+{% endblock %}

templates/components/class/class_card.html

@@ -39,7 +39,7 @@
         <div class="flex flex-col{% if not class.description %} mt-2{% endif %}">
             <!-- Actions principales -->
             <div class="grid grid-cols-2 gap-2 mb-3">
-                <a href="{{ url_for('students') }}?class_id={{ class.id }}" 
+                <a href="{{ url_for('classes.students', id=class.id) }}" 
                    class="bg-{{ year_config.accent }}-50 hover:bg-{{ year_config.accent }}-100 text-{{ year_config.accent }}-700 hover:text-{{ year_config.accent }}-900 px-3 py-2.5 rounded-lg text-xs font-medium transition-colors flex items-center justify-center space-x-2">
                     <svg class="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
                         <path d="M9 6a3 3 0 11-6 0 3 3 0 616 0zM17 6a3 3 0 11-6 0 3 3 0 616 0zM12.93 17c.046-.327.07-.66.07-1a6.97 6.97 0 00-1.5-4.33A5 5 0 0119 16v1h-6.07zM6 11a5 5 0 515 5v1H1v-1a5 5 0 515-5z"/>