colyseus auth to dart

auth.dart

import 'dart:io';

import 'package:http/http.dart' as http;

class Auth {
  String token;
  String endpoint;

  Auth(String _endpoint) {
    endpoint = _endpoint.replaceAll("ws", "http");
  }

  hasToken() {
    return token != null;
  }

  login() {
    Map<String, String> query;
    this.request("POST", "/auth", query, "");
  }

  request(String method, String segments, Map<String, String> query,
      String body) async {
    if (query == null) query = {};

    if (this.hasToken()) {
      query["token"] = token;
    }

    List<String> queryParams = [];
    query.forEach((key, value) => queryParams.add('$key=$value'));

    var client = new http.Client();
    var request = new http.Request(method, Uri.parse('$endpoint/$segments'));
    if (body != null) {
      request.headers[HttpHeaders.contentTypeHeader] =
          'application/json; charset=utf-8';
      request.body = body;
    }

    var response = await client.send(request);
    response.stream.bytesToString().then((value) => print(value));
  }
}