gistfile1.txt

// Three different ways to access a document

//using a DocumentSnapshot -  does not retrieve the document
Stream<WorkoutSession?> getWorkoutStream(String workoutId) {
    return FirebaseFirestore.instance
        .collection('users')
        .doc('testuserId')
        .collection('workouts')
        .doc(workoutId)
        .snapshots()
        .map((DocumentSnapshot<Map<String, dynamic>> snapshot) {
      if (snapshot.exists && snapshot.data() != null) {
        // WorkoutSession.fromJson should be implemented in your WorkoutSession class
        return WorkoutSession.fromJson(snapshot.data()!);
      } else {
        // If the document with the specified workoutId doesn't exist, return null
        return null;
      }
    });
  }

// Using a collection - it works offline
  Stream<List<WorkoutSession>> getUsersWorkouts() {
    final collectionRef = FirebaseFirestore.instance
        .collection('users')
        .doc('testuserId')
        .collection('workouts');

    return collectionRef.snapshots().map<List<WorkoutSession>>(
      (QuerySnapshot<Map<String, dynamic>> snapshot) {
        if (snapshot.docs.isNotEmpty) {
          return snapshot.docs
              .map<WorkoutSession>(
                (doc) => WorkoutSession.fromJson(doc.data()),
              )
              .toList();
        } else {
          return [];
        }
      },
    );
  }
  
  //Using GET - cant find the document, the error says "cloud_firestore/unavailable" 
    Future<WorkoutSession?> getWorkoutStream(String workoutId) async {
    final docSnapshot = await FirebaseFirestore.instance
        .collection('users')
        .doc('testuserId')
        .collection('workouts')
        .doc(workoutId).get();
    if(docSnapshot.exists) {
      return WorkoutSession.fromJson(docSnapshot.data()!);
    } else {
      return null;
    }
  }