content: import React from 'react';
  import IconButton from '../../../components/icon_button';
  import PropTypes from 'prop-types';
  import { defineMessages, injectIntl } from 'react-intl';
  
  const messages = defineMessages({
    add_poll: { id: 'poll_button.add_poll', defaultMessage: 'Add a poll' },
    remove_poll: { id: 'poll_button.remove_poll', defaultMessage: 'Remove poll' },
  });
  
  const iconStyle = {
    height: null,
    lineHeight: '27px',
  };
  
  export default
  @injectIntl
  class PollButton extends React.PureComponent {
  
    static propTypes = {
      disabled: PropTypes.bool,
      unavailable: PropTypes.bool,
      active: PropTypes.bool,
      onClick: PropTypes.func.isRequired,
      intl: PropTypes.object.isRequired,
    };
  
    handleClick = () => {
      this.props.onClick();
    }
  
    render () {
      const { intl, active, unavailable, disabled } = this.props;
  
      if (unavailable) {
        return null;
      }
  
      return (
        <div className='compose-form__poll-button'>
          <IconButton
            icon='tasks'
            title={intl.formatMessage(active ? messages.remove_poll : messages.add_poll)}
            disabled={disabled}
            onClick={this.handleClick}
            className={`compose-form__poll-button-icon ${active ? 'active' : ''}`}
            size={18}
            inverted
            style={iconStyle}
          />
        </div>
      );
    }
  
  }
  