class LinkData { final String url; final String title; final String description; final String imageUrl; LinkData( {required this.url, required this.title, required this.description, required this.imageUrl}); factory LinkData.fromMastodonJson(Map json) => LinkData( url: json['url'] ?? 'Unknown', title: json['title'] ?? 'Unknown', description: json['description'] ?? '', imageUrl: json['image'] ?? '', ); }