Mailspring/packages/client-app/internal_packages/message-list/lib/sidebar-plugin-container.jsx

import React from "react";
import {FocusedContactsStore} from "nylas-exports";
import {InjectedComponentSet} from "nylas-component-kit";

class FocusedContactStorePropsContainer extends React.Component {
  static displayName = 'FocusedContactStorePropsContainer';

  constructor(props) {
    super(props);
    this.state = this._getStateFromStores()
  }

  componentDidMount() {
    this.unsubscribe = FocusedContactsStore.listen(this._onChange);
  }

  componentWillUnmount() {
    this.unsubscribe();
  }

  _onChange = () => {
    this.setState(this._getStateFromStores());
  }

  _getStateFromStores() {
    return {
      sortedContacts: FocusedContactsStore.sortedContacts(),
      focusedContact: FocusedContactsStore.focusedContact(),
      focusedContactThreads: FocusedContactsStore.focusedContactThreads(),
    };
  }

  render() {
    let classname = "sidebar-section";
    let inner = null;
    if (this.state.focusedContact) {
      classname += " visible";
      inner = React.cloneElement(this.props.children, this.state);
    }
    return (
      <div className={classname}>{inner}</div>
    );
  }
}

const SidebarPluginContainerInner = (props) => {
  return (
    <InjectedComponentSet
      className="sidebar-contact-card"
      key={props.focusedContact.email}
      matching={{role: "MessageListSidebar:ContactCard"}}
      direction="column"
      exposedProps={{
        contact: props.focusedContact,
        contactThreads: props.focusedContactThreads,
      }}
    />
  );
}

SidebarPluginContainerInner.propTypes = {
  focusedContact: React.PropTypes.object,
  focusedContactThreads: React.PropTypes.array,
};

export default class SidebarPluginContainer extends React.Component {
  static displayName = 'SidebarPluginContainer';

  static containerStyles = {
    order: 1,
    flexShrink: 0,
    minWidth: 200,
    maxWidth: 300,
  };

  render() {
    return (
      <FocusedContactStorePropsContainer>
        <SidebarPluginContainerInner />
      </FocusedContactStorePropsContainer>
    );
  }
}