import 'package:cloud_firestore/cloud_firestore.dart';
import 'models/user.dart';

class DatabaseManager {
  CollectionReference usersList =
      FirebaseFirestore.instance.collection("Users");

  // Get stream with users ordered by total points from firestore
  Stream<List> getUsersList() async* {
    List<dynamic> users = [];
    try {
      await usersList.orderBy("total_points", descending: true).snapshots().
        listen((snap){
        snap.docs.forEach((element){
        users.add(element.data());
        });
      });
      yield users;
    } catch(e){
      print(e.toString());
      yield [];
    }
  }
  //It is not necessary.At least right now
  // List<User> _userListFromSnapshot(QuerySnapshot snapshot){
  //   return snapshot.docs.map((doc){
  //     return User(
  //       shared_id: doc.get('shared_id'),
  //       name: doc.get('name'),
  //       total_points: doc.get('total_ponts'),
  //     );
  //   }).toList();
  // }
  //
  //  dynamic get users {
  //   return usersList.orderBy("total_points", descending: true).snapshots();
  // }
}