class Publication {
  int id;
  int userId;
  String articleTitle;
  String journalName;
  DateTime date;
  String author;
  DateTime? createdAt;
  DateTime? updatedAt;

  Publication({
    required this.id,
    required this.userId,
    required this.articleTitle,
    required this.journalName,
    required this.date,
    required this.author,
    this.createdAt,
    this.updatedAt,
  });

  // Convert a Publication to a Map
  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'user_id': userId,
      'article_title': articleTitle,
      'journal_name': journalName,
      'date': date.toIso8601String(),
      'author': author,
      'created_at': createdAt?.toIso8601String(),
      'updated_at': updatedAt?.toIso8601String(),
    };
  }

  // Create a Publication from a Map
  factory Publication.fromMap(Map<String, dynamic> map) {
    return Publication(
      id: map['id'],
      userId: map['user_id'],
      articleTitle: map['article_title'],
      journalName: map['journal_name'],
      date: DateTime.parse(map['date']),
      author: map['author'],
      createdAt:
          map['created_at'] != null ? DateTime.parse(map['created_at']) : null,
      updatedAt:
          map['updated_at'] != null ? DateTime.parse(map['updated_at']) : null,
    );
  }
}

class Affiliation {
  int id;
  int userId;
  String articleTitle;
  String journalName;
  DateTime date;
  String author;
  DateTime? createdAt;
  DateTime? updatedAt;

  Affiliation({
    required this.id,
    required this.userId,
    required this.articleTitle,
    required this.journalName,
    required this.date,
    required this.author,
    this.createdAt,
    this.updatedAt,
  });

  // Convert an Affiliation to a Map
  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'user_id': userId,
      'article_title': articleTitle,
      'journal_name': journalName,
      'date': date.toIso8601String(),
      'author': author,
      'created_at': createdAt?.toIso8601String(),
      'updated_at': updatedAt?.toIso8601String(),
    };
  }

  // Create an Affiliation from a Map
  factory Affiliation.fromMap(Map<String, dynamic> map) {
    return Affiliation(
      id: map['id'],
      userId: map['user_id'],
      articleTitle: map['article_title'],
      journalName: map['journal_name'],
      date: DateTime.parse(map['date']),
      author: map['author'],
      createdAt:
          map['created_at'] != null ? DateTime.parse(map['created_at']) : null,
      updatedAt:
          map['updated_at'] != null ? DateTime.parse(map['updated_at']) : null,
    );
  }
}