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app/javascript/gabsocial/components/timeline_queue_button_header.js

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+import { FormattedMessage } from 'react-intl';
+import classNames from 'classnames';
+import { shortNumberFormat } from '../utils/numbers';
+
+export default class TimelineQueueButtonHeader extends PureComponent {
+
+  static propTypes = {
+    onClick: PropTypes.func.isRequired,
+    count: PropTypes.number,
+    itemType: PropTypes.string,
+  };
+
+  static defaultProps = {
+    count: 0,
+    itemType: 'item',
+  };
+
+  render () {
+    const { count, itemType, onClick } = this.props;
+
+    const hasItems = (count > 0);
+
+    const classes = classNames('timeline-queue-header', {
+      'timeline-queue-header--extended': hasItems,
+    });
+
+    return (
+      <div className={classes}>
+        <a className='timeline-queue-header__btn' onClick={onClick}>
+          {
+            hasItems &&
+            <FormattedMessage
+              id='timeline_queue.label'
+              defaultMessage='{count} new {type}'
+              values={{
+                count: shortNumberFormat(count),
+                type: count === 1 ? itemType : `${itemType}s`,
+              }}
+            />
+          }
+        </a>
+      </div>
+    );
+  }
+
+}