weseek__growi/src/client/js/components/InstallerForm.jsx

import React from 'react';
import PropTypes from 'prop-types';
import i18next from 'i18next';
import { translate } from 'react-i18next';

class InstallerForm extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      isValidUserName: true,
    };
    this.checkUserName = this.checkUserName.bind(this);
  }

  componentWillMount() {
    this.changeLanguage('en-US');
  }

  checkUserName(event) {
    const axios = require('axios').create({
      headers: {
        'Content-Type': 'application/json',
        'X-Requested-With': 'XMLHttpRequest'
      },
      responseType: 'json'
    });
    axios.get('/_api/check_username', {params: {username: event.target.value}})
      .then((res) => this.setState({ isValidUserName: res.data.valid }));
  }

  changeLanguage(locale) {
    i18next.changeLanguage(locale);
  }

  render() {
    const hasErrorClass = this.state.isValidUserName ? '' : ' has-error';
    const unavailableUserId = this.state.isValidUserName ? '' : <span><i className="icon-fw icon-ban" />{ this.props.t('installer.unavaliable_user_id') }</span>;
    return (
      <div className={'login-dialog p-t-10 p-b-10 col-sm-offset-4 col-sm-4' + hasErrorClass}>
        <p className="alert alert-success">
          <strong>{ this.props.t('installer.create_initial_account') }</strong><br />
          <small>{ this.props.t('installer.initial_account_will_be_administrator_automatically') }</small>
        </p>

        <form role="form" action="/installer" method="post" id="register-form">
          <div className="input-group m-t-20 m-b-20 mx-auto">
            <div className="radio radio-primary radio-inline">
              <input type="radio" id="radioLangEn" name="registerForm[app:globalLang]" value="en-US"
                     defaultChecked={ true } onClick={() => this.changeLanguage('en-US')} />
              <label htmlFor="radioLangEn">English</label>
            </div>
            <div className="radio radio-primary radio-inline">
              <input type="radio" id="radioLangJa" name="registerForm[app:globalLang]" value="ja"
                     defaultChecked={ false } onClick={() => this.changeLanguage('ja')} />
              <label htmlFor="radioLangJa">日本語</label>
            </div>
          </div>

          <div className={'input-group' + hasErrorClass}>
            <span className="input-group-addon"><i className="icon-user" /></span>
            <input type="text" className="form-control" placeholder={ this.props.t('User ID') }
              name="registerForm[username]" defaultValue={this.props.userName} onBlur={this.checkUserName} required />
          </div>
          <p className="help-block">{ unavailableUserId }</p>

          <div className="input-group">
            <span className="input-group-addon"><i className="icon-tag" /></span>
            <input type="text" className="form-control" placeholder={ this.props.t('Name') }
                   name="registerForm[name]" defaultValue={ this.props.name } required />
          </div>

          <div className="input-group">
            <span className="input-group-addon"><i className="icon-envelope" /></span>
            <input type="email" className="form-control" placeholder={ this.props.t('Email') }
                   name="registerForm[email]" defaultValue={ this.props.email } required />
          </div>

          <div className="input-group">
            <span className="input-group-addon"><i className="icon-lock" /></span>
            <input type="password" className="form-control" placeholder={ this.props.t('Password') }
                   name="registerForm[password]" required />
          </div>

          <input type="hidden" name="_csrf" value={ this.props.csrf } />

          <div className="input-group m-t-30 m-b-20 d-flex justify-content-center">
            <button type="submit" className="fcbtn btn btn-success btn-1b btn-register">
              <span className="btn-label"><i className="icon-user-follow" /></span>
              { this.props.t('Create') }
            </button>
          </div>

          <div className="input-group m-t-30 d-flex justify-content-center">
            <a href="https://growi.org" className="link-growi-org">
              <span className="growi">GROWI</span>.<span className="org">ORG</span>
            </a>
          </div>
        </form>
      </div>
    );
  }
}

InstallerForm.propTypes = {
  // i18next
  t: PropTypes.func.isRequired,
  // for input value
  userName: PropTypes.string,
  name: PropTypes.string,
  email: PropTypes.string,
  csrf: PropTypes.string,
};

export default translate()(InstallerForm);