gab-social/app/javascript/gabsocial/pages/profile_page.js

import { Fragment } from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import ImmutablePureComponent from 'react-immutable-pure-component';
import HeaderContainer from '../features/account_timeline/containers/header_container';
import {WhoToFollowPanel, SignUpPanel} from '../components/panel';
import LinkFooter from '../components/link_footer';
import ProfileInfoPanel from '../features/account_timeline/components/profile_info_panel/profile_info_panel';
import ColumnsArea from '../components/columns_area';

const mapStateToProps = (state, { params: { username }, withReplies = false }) => {
  const accounts = state.getIn(['accounts']);
  const accountFetchError = (state.getIn(['accounts', -1, 'username'], '').toLowerCase() == username.toLowerCase());

  let accountId = -1;
  let account = null;
  let accountUsername = username;
  if (accountFetchError) {
    accountId = null;
  }
  else {
    account = accounts.find(acct => username.toLowerCase() == acct.getIn(['acct'], '').toLowerCase());
    accountId = account ? account.getIn(['id'], null) : -1;
    accountUsername = account ? account.getIn(['acct'], '') : '';
  }

  //Children components fetch information

  return {
    account,
    accountId,
    accountUsername,
  };
};

export default @connect(mapStateToProps)
class ProfilePage extends ImmutablePureComponent {
  static propTypes = {
    account: ImmutablePropTypes.map,
    accountUsername: PropTypes.string.isRequired,
    accountId: PropTypes.number.isRequired,
    children: PropTypes.node,
  };

  render () {
    const {accountId, account, accountUsername} = this.props;

    return (
      <ColumnsArea
        layout={{
          TOP: <HeaderContainer accountId={accountId} username={accountUsername} />,
          RIGHT: (
            <Fragment>
              <SignUpPanel />
              <WhoToFollowPanel />
              <LinkFooter />
            </Fragment>
          ),
          LEFT: <ProfileInfoPanel username={accountUsername} account={account} />,
        }}
      >
        {this.props.children}
      </ColumnsArea>
    )
  }
}