seahub/frontend/src/components/dialog/sysadmin-dialog/sysadmin-group-add-member-dialog.js

import React from 'react';
import PropTypes from 'prop-types';
import { Button, Modal, ModalHeader, ModalBody, ModalFooter } from 'reactstrap';
import { gettext } from '../../../utils/constants';
import UserSelect from '../../user-select';

const propTypes = {
  toggle: PropTypes.func.isRequired,
  addMembers: PropTypes.func.isRequired
};

class SysAdminGroupAddMemberDialog extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      selectedOptions: null,
      isSubmitBtnDisabled: true
    };
  }

  handleSelectChange = (options) => {
    this.setState({
      selectedOptions: options,
      isSubmitBtnDisabled: !options.length
    });
  }

  addMembers = () => {
    let emails = this.state.selectedOptions.map(item => item.email);
    this.props.addMembers(emails);
    this.props.toggle();
  } 

  render() {
    const { isSubmitBtnDisabled } = this.state;
    return (
      <Modal isOpen={true}>
        <ModalHeader toggle={this.props.toggle}>{gettext('Add Member')}</ModalHeader>
        <ModalBody>
          <UserSelect
            ref="userSelect"
            isMulti={true}
            className="reviewer-select"
            placeholder={gettext('Search users')}
            onSelectChange={this.handleSelectChange}
          /> 
        </ModalBody>
        <ModalFooter>
          <Button color="secondary" onClick={this.props.toggle}>{gettext('Cancel')}</Button>
          <Button color="primary" onClick={this.addMembers} disabled={isSubmitBtnDisabled}>{gettext('Submit')}</Button>
        </ModalFooter>
      </Modal>
    );
  }
}

SysAdminGroupAddMemberDialog.propTypes = propTypes;

export default SysAdminGroupAddMemberDialog;