talk/plugins/talk-plugin-flag-details/client/components/UserFlagDetails.js

import React, {Component} from 'react';
import PropTypes from 'prop-types';
import {t} from 'plugin-api/beta/client/services';
import styles from './UserFlagDetails.css';

class UserFlagDetails extends Component {

  render() {
    const {comment: {actions}, viewUserDetail} = this.props;

    const flagActions = actions && actions.filter((a) => a.__typename === 'FlagAction');
    const summaries = flagActions.reduce((sum, action) => {
      if (!action.user) {
        return sum;
      }
      if (!(action.reason in sum)) {
        sum[action.reason] = {count: 0, actions: []};
      }
      sum[action.reason].count++;
      sum[action.reason].actions.push(action);
      return sum;
    }, {});

    return (
      <ul className={styles.detail}>
        {Object.keys(summaries)
          .map((reason) => (
            <li key={reason}>
              {t(`flags.reasons.comment.${reason.toLowerCase()}`)} ({summaries[reason].count})
              <ul className={styles.subDetail}>
                {summaries[reason].actions.map((action) =>
                  <li key={action.user.id}>
                    {action.user &&
                      <a className={styles.username} onClick={() => viewUserDetail(action.user.id)}>
                        {action.user.username}
                      </a>
                    }
                    {action.message}
                  </li>
                )}
              </ul>
            </li>
          ))
        }
      </ul>
    );
  }
}

UserFlagDetails.propTypes = {
  comment: PropTypes.shape({
    actions: PropTypes.arrayOf(PropTypes.shape({
      message: PropTypes.string,
      user: PropTypes.shape({username: PropTypes.string})
    })).isRequired,
  }).isRequired,
  viewUserDetail: PropTypes.func.isRequired,
};

export default UserFlagDetails;