getConnection();
// Récupérer les statistiques globales
$stmt = $db->query("
SELECT
(SELECT COUNT(*) FROM utilisateurs WHERE id_type IN (2,3)) as nb_eleves,
(SELECT COUNT(*) FROM classes WHERE actif = 1) as nb_classes,
(SELECT COUNT(*) FROM utilisateurs WHERE id_type = 1) as nb_enseignants,
(SELECT COUNT(*) FROM evaluations WHERE actif = 1) as nb_evaluations_actives,
(SELECT COUNT(*) FROM evaluations) as nb_evaluations_total
");
$stats = $stmt->fetch();
// Récupérer les évaluations récentes
$stmt = $db->query("
SELECT
e.id_evaluation,
e.titre,
e.type,
e.actif,
e.duree_minutes,
e.note_totale,
COUNT(DISTINCT q.id_question) as nb_questions,
COUNT(DISTINCT t.id_eleve) as nb_participants
FROM evaluations e
LEFT JOIN questions q ON e.id_evaluation = q.id_evaluation
LEFT JOIN tentatives_eleves t ON e.id_evaluation = t.id_evaluation
GROUP BY e.id_evaluation
ORDER BY e.id_evaluation DESC
LIMIT 5
");
$evaluations_recentes = $stmt->fetchAll();
// Récupérer la liste des classes avec le nombre d'élèves
$stmt = $db->query("
SELECT
c.id_classe,
c.nom_classe,
c.niveau,
c.type_classe,
COUNT(u.id_utilisateur) as nb_eleves
FROM classes c
LEFT JOIN utilisateurs u ON c.id_classe = u.id_classe AND u.actif = 1
WHERE c.actif = 1
GROUP BY c.id_classe
ORDER BY c.niveau, c.nom_classe
");
$classes = $stmt->fetchAll();
// Récupérer les dernières connexions
$stmt = $db->query("
SELECT
u.login,
u.nom,
u.prenom,
c.nom_classe,
u.date_derniere_connexion
FROM utilisateurs u
LEFT JOIN classes c ON u.id_classe = c.id_classe
WHERE u.id_type IN (2,3) AND u.date_derniere_connexion IS NOT NULL
ORDER BY u.date_derniere_connexion DESC
LIMIT 10
");
$dernieres_connexions = $stmt->fetchAll();
} catch (PDOException $e) {
error_log("Erreur dashboard enseignant : " . $e->getMessage());
$stats = ['nb_eleves' => 0, 'nb_classes' => 0, 'nb_enseignants' => 0, 'nb_evaluations_actives' => 0, 'nb_evaluations_total' => 0];
$classes = [];
$evaluations_recentes = [];
$dernieres_connexions = [];
}
?>
Dashboard Enseignant - <?= htmlspecialchars($user['prenom']) ?>