QuickBlox JavaScript SDK

                                        import React, { useEffect } from 'react';
// @ts-ignore
import * as QB from "quickblox/quickblox";
import {
  QuickBloxUIKitProvider,
  qbDataContext,
  QuickBloxUIKitDesktopLayout, LoginData, AuthorizationData, QBDataContextType,
} from 'quickblox-react-ui-kit';
import { QBConfig } from './QBconfig';
import './App.css';

function App() {

  const currentUser: LoginData = {
    login: '',
    password: '',
  };

  const qbUIKitContext: QBDataContextType = React.useContext(qbDataContext);

  const [isUserAuthorized, setUserAuthorized] = React.useState(false);
  const [isSDKInitialized, setSDKInitialized] = React.useState(false);

  const prepareSDK = async (): Promise<void> => {
    // check if we have installed SDK
    if ((window as any).QB === undefined) {
      if (QB !== undefined) {
        (window as any).QB = QB;
      } else {
        let QBLib = require('quickblox/quickblox.min');
        (window as any).QB = QBLib;
      }
    }

    const APPLICATION_ID = QBConfig.credentials.appId;
    const AUTH_KEY = QBConfig.credentials.authKey;
    const AUTH_SECRET = QBConfig.credentials.authSecret;
    const ACCOUNT_KEY = QBConfig.credentials.accountKey;
    const CONFIG = QBConfig.appConfig;

    QB.init(APPLICATION_ID, AUTH_KEY, AUTH_SECRET, ACCOUNT_KEY, CONFIG);

  };

  useEffect(() => {
    if (!isSDKInitialized) {
      prepareSDK().then(result => {

        QB.createSession(currentUser, async function (errorCreateSession: any, session: any) {
          if (errorCreateSession) {
            console.log('Create User Session has error:', JSON.stringify(errorCreateSession));
          } else {
            const userId: number = session.user_id;
            const password: string = session.token;
            const paramsConnect = { userId, password };

            QB.chat.connect(paramsConnect, async function (errorConnect: any, resultConnect: any) {
              if (errorConnect) {
                console.log('Can not connect to chat server: ', errorConnect);
              } else {
                const authData: AuthorizationData = {
                  userId: userId,
                  password: password,
                  userName: currentUser.login,
                  sessionToken: session.token
                };
                await qbUIKitContext.authorize(authData);
                setSDKInitialized(true);
                setUserAuthorized(true);
              }
            });
          }
        });
      }).catch(
          e => {
            console.log('init SDK has error: ', e)
          });
    }
  }, []);

  return (
      <div>
        <QuickBloxUIKitProvider
            maxFileSize={100 * 1000000}
            accountData={{ ...QBConfig.credentials }}
            qbConfig={{ ...QBConfig }}
            loginData={{
              login: currentUser.login,
              password: currentUser.password,
            }}
        >
          <div className="App">
            {
              // React states indicating the ability to render UI
              isSDKInitialized && isUserAuthorized
                  ?
                  <QuickBloxUIKitDesktopLayout />
                  :
                  <div>wait while SDK is initializing...</div>
            }
          </div>
        </QuickBloxUIKitProvider>
      </div>
  );
}

export default App;