JSON to Dart Model Converter

class Stats {
  final int? followers;
  final int? repositories;

  Stats({
    this.followers,
    this.repositories,
  });

  factory Stats.fromJson(Map<String, dynamic> json) {
    return Stats(
      followers: json['followers'] as int?,
      repositories: json['repositories'] as int?,
    );
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['followers'] = followers;
    data['repositories'] = repositories;
    return data;
  }

  Stats copyWith({
    int? followers,
    int? repositories,
  }) {
    return Stats(
      followers: followers ?? this.followers,
      repositories: repositories ?? this.repositories,
    );
  }
}

class UserProfile {
  final String? userId;
  final String? username;
  final bool? verified;
  final String? createdAt;
  final Stats? stats;
  final List<String>? skills;

  UserProfile({
    this.userId,
    this.username,
    this.verified,
    this.createdAt,
    this.stats,
    this.skills,
  });

  factory UserProfile.fromJson(Map<String, dynamic> json) {
    return UserProfile(
      userId: json['user_id'] as String?,
      username: json['username'] as String?,
      verified: json['verified'] as bool?,
      createdAt: json['created_at'] as String?,
      stats: json['stats'] != null ? Stats.fromJson(json['stats'] as Map<String, dynamic>) : null,
      skills: json['skills'] != null ? List<String>.from(json['skills']) : null,
    );
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['user_id'] = userId;
    data['username'] = username;
    data['verified'] = verified;
    data['created_at'] = createdAt;
    if (stats != null) {
      data['stats'] = stats!.toJson();
    }
    data['skills'] = skills;
    return data;
  }

  UserProfile copyWith({
    String? userId,
    String? username,
    bool? verified,
    String? createdAt,
    Stats? stats,
    List<String>? skills,
  }) {
    return UserProfile(
      userId: userId ?? this.userId,
      username: username ?? this.username,
      verified: verified ?? this.verified,
      createdAt: createdAt ?? this.createdAt,
      stats: stats ?? this.stats,
      skills: skills ?? this.skills,
    );
  }
}