Lesson

class Lesson {
  String? id; // lessonId
  String? baseLessonID; // reference to the original lesson's id
  String? playId; // for lesson started
  String? planId; // for lesson started from lesson plan
  String? planPlayId; // for lesson started from lesson plan
  GENERAL_STATUS status;
  String imageUrl;
  String? thumbImageUrl;
  Localizable? title;
  Localizable? description;

  List<String>? videoURLs;
  Localizable? subtitleUrl;
  int duration;
  String? intensity;
  WORKOUT_ALGORITHM algorithm;
  List<SessionConfig> sessions;
  GROUP_INTENSITY? groupByIntensity;
  List<GROUP_STYLE> groupByStyles;
  List<GROUP_TYPE> groupByTypes;
  List<GROUP_MUSCLE> groupByMuscles;
  List<GROUP_GOAL> groupByGoals;
  List<GROUP_EQUIPMENT> groupByEquipments;
  List<GROUP_TRAINER> groupByTrainers;
  bool? requiredWarmup;
  bool? requiredCooldown;
  List<Lesson>? relatedLessons;

  // stats
  final int? totalViews;
  final int? totalPlays;
  final int? totalCompletions;

  final DateTime? lastViewed;
  final DateTime? lastPlayed;
  final DateTime? lastCompleted;
}