class SmsMessage {
  final int? id;
  final String phoneNumber;
  final String? contactName;
  final String content;
  final String type; // 'received' | 'sent'
  final String smsDate;

  SmsMessage({
    this.id,
    required this.phoneNumber,
    this.contactName,
    required this.content,
    required this.type,
    required this.smsDate,
  });

  Map<String, dynamic> toJson() => {
        'phone_number': phoneNumber,
        'contact_name': contactName,
        'content': content,
        'type': type,
        'sms_date': smsDate,
      };

  factory SmsMessage.fromJson(Map<String, dynamic> json) => SmsMessage(
        id: json['id'],
        phoneNumber: json['phone_number'],
        contactName: json['contact_name'],
        content: json['content'],
        type: json['type'],
        smsDate: json['sms_date'],
      );
}