talk/plugins/talk-plugin-auth/client/components/SignInButton.js

import React from 'react';
import { Button } from 'plugin-api/beta/client/components/ui';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import { showSignInDialog } from 'coral-embed-stream/src/actions/login';
import t from 'coral-framework/services/i18n';

const SignInButton = ({ currentUser, showSignInDialog }) => (
  <div className="talk-stream-auth-sign-in-button">
    {!currentUser ? (
      <Button id="coralSignInButton" onClick={showSignInDialog} full>
        {t('sign_in.sign_in_to_comment')}
      </Button>
    ) : null}
  </div>
);

const mapStateToProps = ({ auth }) => ({
  currentUser: auth.user,
});

const mapDispatchToProps = dispatch =>
  bindActionCreators({ showSignInDialog }, dispatch);

export default connect(mapStateToProps, mapDispatchToProps)(SignInButton);