class ClassModel {
  final String id;
  final String name;
  final int capacity;
  final String? teacherId;

  ClassModel({
    required this.id,
    required this.name,
    required this.capacity,
    this.teacherId,
  });

  factory ClassModel.fromMap(Map<String, dynamic> map) {
    return ClassModel(
      id: map['id'] ?? '',
      name: map['name'] ?? '',
      capacity: map['capacity'] ?? 15,
      teacherId: map['teacher_id'],
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'name': name,
      'capacity': capacity,
      'teacher_id': teacherId,
    };
  }
}