git-touch-android-ios-app/lib/providers/user.dart

import 'dart:async';
import 'package:flutter/widgets.dart';
import 'package:rxdart/subjects.dart';
import 'package:rxdart/rxdart.dart';
import 'package:git_touch/utils/utils.dart';

Future queryUser(String login) async {
  var data = await query('''
{
  user(login: "$login") {
    name
    avatarUrl
    bio
    email
    repositories {
      totalCount
    }
    starredRepositories {
      totalCount
    }
    followers {
      totalCount
    }
    following {
      totalCount
    }
  }
}

''');
  return data['user'];
}

class UserBloc {
  Map<String, dynamic> _userDict = {};

  final _user = BehaviorSubject(seedValue: null);

  fetchUser(String login) async {
    var user = await queryUser(login);
    _userDict[login] = user;
    return user;
  }

  UserBloc() {}
}

class UserProvider extends InheritedWidget {
  final UserBloc bloc;

  UserProvider({
    Key key,
    Widget child,
    @required UserBloc bloc,
  })  : bloc = bloc,
        super(key: key, child: child);

  @override
  bool updateShouldNotify(InheritedWidget oldWidget) => true;

  static UserBloc of(BuildContext context) =>
      (context.inheritFromWidgetOfExactType(UserProvider) as UserProvider).bloc;
}