PhysiGo/app/lib/challenge/services/challenge_service.dart

import 'package:cloud_firestore/cloud_firestore.dart';

import '../models/challenge.dart';

class ChallengeService {
  static final _db = FirebaseFirestore.instance;
  static final _dailyChallenges = _db.collection("DailyChallenges");
  static final _weeklyChallenges = _db.collection("WeeklyChallenges");

  static Future<Challenge> getDailyChallenge() async {
    final challenges = await _dailyChallenges.orderBy("date", descending: true).limit(1).get();
    final challenge = challenges.docs.first.data();
    challenge["list_exercises"] = await _getExercisesFromChallenge(challenge);
    return Challenge.fromMap(challenge);
  }

  static Future<Challenge> getWeeklyChallenge() async {
    final challenges = await _weeklyChallenges.orderBy("date", descending: true).limit(1).get();
    final challenge = challenges.docs.first.data();
    challenge["list_exercises"] = await _getExercisesFromChallenge(challenge);
    return Challenge.fromMap(challenge);
  }

  static Future<List<Map<String, dynamic>>> _getExercisesFromChallenge(Map<String, dynamic> challenge) async {
    return await Future.wait(
        List<DocumentReference<Map<String, dynamic>>>.from(challenge["list_exercises"]).map((exerciseRef) async {
      final exercise = await exerciseRef.get();
      return {"id": exercise.id,...exercise.data()!};
    }));
  }
}