onufitness_mobile/lib/screens/rise/models/get_challenges_response_model.dart

import 'dart:convert';

ChallengesResponseModel challengesResponseModelFromJson(String str) =>
    ChallengesResponseModel.fromJson(json.decode(str));

String challengesResponseModelToJson(ChallengesResponseModel data) =>
    json.encode(data.toJson());

// Helper function for safe integer conversion
int? _safeToInt(dynamic value) {
  if (value == null) return null;
  if (value is int) return value;
  if (value is double) return value.toInt();
  if (value is String) {
    return int.tryParse(value);
  }
  return null;
}

class ChallengesResponseModel {
  bool? isSuccess;
  int? statusCode;
  String? message;
  Data? data;
  dynamic errors;

  ChallengesResponseModel({
    this.isSuccess,
    this.statusCode,
    this.message,
    this.data,
    this.errors,
  });

  factory ChallengesResponseModel.fromJson(Map<String, dynamic> json) =>
      ChallengesResponseModel(
        isSuccess: json["isSuccess"],
        statusCode: _safeToInt(json["statusCode"]),
        message: json["message"],
        data: json["data"] == null ? null : Data.fromJson(json["data"]),
        errors: json["errors"],
      );

  Map<String, dynamic> toJson() => {
    "isSuccess": isSuccess,
    "statusCode": statusCode,
    "message": message,
    "data": data?.toJson(),
    "errors": errors,
  };
}

class Data {
  int? totalCount;
  List<ChallengeItem>? items;

  Data({this.totalCount, this.items});

  factory Data.fromJson(Map<String, dynamic> json) => Data(
    totalCount: _safeToInt(json["totalCount"]),
    items:
        json["items"] == null
            ? []
            : List<ChallengeItem>.from(
              json["items"]!.map((x) => ChallengeItem.fromJson(x)),
            ),
  );

  Map<String, dynamic> toJson() => {
    "totalCount": totalCount,
    "items":
        items == null ? [] : List<dynamic>.from(items!.map((x) => x.toJson())),
  };
}

class ChallengeItem {
  int? challengeId;
  String? challengeTitle;
  String? challengeDescription;
  DateTime? startDate;
  DateTime? endDate;
  String? challengeImageName;
  String? challengeVideoName;
  String? challengeThumbnailName;
  int? fitnessGoalId;
  int? challengeVisibilityID;
  String? fitnessGoalTitle;
  int? totalParticipants;
  bool? isChallengeJoined;
  bool? isChallengeStarted;
  bool? isChallengeEnded;
  List<ChallengeTask>? tasks;
  List<Participant>? participants;

  ChallengeItem({
    this.challengeId,
    this.challengeTitle,
    this.challengeDescription,
    this.startDate,
    this.endDate,
    this.challengeImageName,
    this.challengeVideoName,
    this.challengeThumbnailName,
    this.fitnessGoalId,
    this.challengeVisibilityID,
    this.fitnessGoalTitle,
    this.totalParticipants,
    this.isChallengeJoined,
    this.tasks,
    this.participants,
    this.isChallengeStarted,
    this.isChallengeEnded,
  });

  factory ChallengeItem.fromJson(Map<String, dynamic> json) => ChallengeItem(
    challengeId: _safeToInt(json["challengeID"]),
    challengeTitle: json["challengeTitle"],
    challengeDescription: json["challengeDescription"],
    startDate:
        json["startDate"] == null ? null : DateTime.tryParse(json["startDate"]),
    endDate:
        json["endDate"] == null ? null : DateTime.tryParse(json["endDate"]),
    challengeImageName: json["challengeImageName"],
    challengeVideoName: json["challengeVideoName"],
    challengeThumbnailName: json["challengeThumbnailName"],
    fitnessGoalId: _safeToInt(json["fitnessGoalID"]),
    fitnessGoalTitle: json["fitnessGoalTitle"],
    totalParticipants: _safeToInt(json["totalParticipants"]),
    isChallengeJoined: json["isChallengeJoined"],
    isChallengeEnded: json["isChallengeEnded"],
    isChallengeStarted: json["isChallengeStarted"],
    challengeVisibilityID: json["challengeVisibilityID"],
    tasks:
        json["tasks"] == null
            ? []
            : List<ChallengeTask>.from(
              json["tasks"]!.map((x) => ChallengeTask.fromJson(x)),
            ),
    participants:
        json["participants"] == null
            ? []
            : List<Participant>.from(
              json["participants"]!.map((x) => Participant.fromJson(x)),
            ),
  );

  Map<String, dynamic> toJson() => {
    "challengeID": challengeId,
    "challengeTitle": challengeTitle,
    "challengeDescription": challengeDescription,
    "startDate": startDate?.toIso8601String(),
    "endDate": endDate?.toIso8601String(),
    "challengeImageName": challengeImageName,
    "challengeVideoName": challengeVideoName,
    "challengeThumbnailName": challengeThumbnailName,
    "fitnessGoalID": fitnessGoalId,
    "fitnessGoalTitle": fitnessGoalTitle,
    "totalParticipants": totalParticipants,
    "isChallengeJoined": isChallengeJoined,
    "isChallengeStarted": isChallengeStarted,
    "isChallengeEnded": isChallengeEnded,
    "challengeVisibilityID": challengeVisibilityID,
    "tasks":
        tasks == null ? [] : List<dynamic>.from(tasks!.map((x) => x.toJson())),
    "participants":
        participants == null
            ? []
            : List<dynamic>.from(participants!.map((x) => x.toJson())),
  };
}

class ChallengeTask {
  int? challengeTaskId;
  String? taskTitle;
  int? taskMetricId;
  String? taskUnit;
  int? targetValue;
  int? challengeId;
  String? createdByUserId;

  ChallengeTask({
    this.challengeTaskId,
    this.taskTitle,
    this.taskMetricId,
    this.taskUnit,
    this.targetValue,
    this.challengeId,
    this.createdByUserId,
  });

  factory ChallengeTask.fromJson(Map<String, dynamic> json) => ChallengeTask(
    challengeTaskId: _safeToInt(json["challengeTaskID"]),
    taskTitle: json["taskTitle"],
    taskMetricId: _safeToInt(json["taskMetricID"]),
    taskUnit: json["taskUnit"],
    targetValue: _safeToInt(json["targetValue"]),
    challengeId: _safeToInt(json["challengeID"]),
    createdByUserId: json["createdByUserID"],
  );

  Map<String, dynamic> toJson() => {
    "challengeTaskID": challengeTaskId,
    "taskTitle": taskTitle,
    "taskMetricID": taskMetricId,
    "taskUnit": taskUnit,
    "targetValue": targetValue,
    "challengeID": challengeId,
    "createdByUserID": createdByUserId,
  };
}

class Participant {
  int? challengeParticipationId;
  String? userId;
  String? firstName;
  String? lastName;
  String? fullName;
  int? userTypeId;
  String? userTypeName;
  String? profilePicture;
  String? status;
  DateTime? joinedAt;
  DateTime? leftAt;

  Participant({
    this.challengeParticipationId,
    this.userId,
    this.firstName,
    this.lastName,
    this.fullName,
    this.userTypeId,
    this.userTypeName,
    this.profilePicture,
    this.status,
    this.joinedAt,
    this.leftAt,
  });

  factory Participant.fromJson(Map<String, dynamic> json) => Participant(
    challengeParticipationId: _safeToInt(json["challengeParticipationID"]),
    userId: json["userID"],
    firstName: json["firstName"],
    lastName: json["lastName"],
    fullName: json["fullName"],
    userTypeId: _safeToInt(json["userTypeId"]),
    userTypeName: json["userTypeName"],
    profilePicture: json["profilePicture"],
    status: json["status"],
    joinedAt:
        json["joinedAt"] == null ? null : DateTime.tryParse(json["joinedAt"]),
    leftAt: json["leftAt"] == null ? null : DateTime.tryParse(json["leftAt"]),
  );

  Map<String, dynamic> toJson() => {
    "challengeParticipationID": challengeParticipationId,
    "userID": userId,
    "firstName": firstName,
    "lastName": lastName,
    "fullName": fullName,
    "userTypeId": userTypeId,
    "userTypeName": userTypeName,
    "profilePicture": profilePicture,
    "status": status,
    "joinedAt": joinedAt?.toIso8601String(),
    "leftAt": leftAt?.toIso8601String(),
  };
}