gab-social/app/javascript/gabsocial/components/timeline_queue_button_header.js

import { FormattedMessage } from 'react-intl'
import classNames from 'classnames/bind'
import { shortNumberFormat } from '../utils/numbers'
import Button from './button'
import Text from './text'

const cx = classNames.bind(_s)

export default class TimelineQueueButtonHeader extends PureComponent {

  static propTypes = {
    onClick: PropTypes.func.isRequired,
    count: PropTypes.number,
    itemType: PropTypes.string,
    floating: PropTypes.bool,
  }

  static defaultProps = {
    count: 0,
    itemType: 'item',
  }

  render () {
    const { count, itemType, onClick } = this.props

    const hasItems = count > 0

    const classes = cx({
      default: 1,
      posFixed: 1,
      displayNone: !hasItems,
      top80PX: 1,
      z4: 1,
      center160PX: 1,
    })

    return (
      <div className={classes}>
        <Button
          isNarrow
          color='white'
          backgroundColor='brand'
          onClick={onClick}
        >
          {
            hasItems &&
            <Text color='inherit' size='small'>
              <FormattedMessage
                id='timeline_queue.label'
                defaultMessage='{count} new {type}'
                values={{
                  count: shortNumberFormat(count),
                  type: count === 1 ? itemType : `${itemType}s`,
                }}
              />
            </Text>
          }
        </Button>
      </div>
    )
  }

}