mastodon/app/assets/javascripts/components/features/account_timeline/components/header.jsx

import PureRenderMixin from 'react-addons-pure-render-mixin';
import ImmutablePropTypes from 'react-immutable-proptypes';
import InnerHeader from '../../account/components/header';
import ActionBar from '../../account/components/action_bar';

const Header = React.createClass({
  contextTypes: {
    router: React.PropTypes.object
  },

  propTypes: {
    account: ImmutablePropTypes.map.isRequired,
    me: React.PropTypes.number.isRequired,
    onFollow: React.PropTypes.func.isRequired,
    onBlock: React.PropTypes.func.isRequired,
    onMention: React.PropTypes.func.isRequired
  },

  mixins: [PureRenderMixin],

  handleFollow () {
    this.props.onFollow(this.props.account);
  },

  handleBlock () {
    this.props.onBlock(this.props.account);
  },

  handleMention () {
    this.props.onMention(this.props.account, this.context.router);
  },

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

    if (!account) {
      return null;
    }

    return (
      <div>
        <InnerHeader
          account={account}
          me={me}
          onFollow={this.handleFollow}
        />

        <ActionBar
          account={account}
          me={me}
          onBlock={this.handleBlock}
          onMention={this.handleMention}
        />
      </div>
    );
  }
});

export default Header;