Mailspring/app/internal_packages/notifications/lib/sidebar/sync-activity.jsx

import classNames from 'classnames';
import { PropTypes, Actions, React, Utils } from 'mailspring-exports';

import InitialSyncActivity from './initial-sync-activity';
import SyncbackActivity from './syncback-activity';

export default class SyncActivity extends React.Component {
  static propTypes = {
    initialSync: PropTypes.bool,
    syncbackTasks: PropTypes.array,
  };

  constructor() {
    super();
    this.state = {
      expanded: false,
      blink: false,
    };
    this.mounted = false;
  }

  componentDidMount() {
    this.mounted = true;
    this.unsub = Actions.expandInitialSyncState.listen(this.showExpandedState);
  }

  shouldComponentUpdate(nextProps, nextState) {
    return !Utils.isEqualReact(nextProps, this.props) || !Utils.isEqualReact(nextState, this.state);
  }

  componentWillUnmount() {
    this.mounted = false;
    this.unsub();
  }

  showExpandedState = () => {
    if (!this.state.expanded) {
      this.setState({ expanded: true });
    } else {
      this.setState({ blink: true });
      setTimeout(() => {
        if (this.mounted) {
          this.setState({ blink: false });
        }
      }, 1000);
    }
  };

  hideExpandedState = () => {
    this.setState({ expanded: false });
  };

  _renderInitialSync() {
    if (!this.props.initialSync) {
      return false;
    }
    return <InitialSyncActivity />;
  }

  _renderSyncbackTasks() {
    return <SyncbackActivity syncbackTasks={this.props.syncbackTasks} />;
  }

  _renderExpandedDetails() {
    return (
      <div>
        <a className="close-expanded" onClick={this.hideExpandedState}>
          Hide
        </a>
        {this._renderSyncbackTasks()}
        {this._renderInitialSync()}
      </div>
    );
  }

  render() {
    const { initialSync, syncbackTasks } = this.props;
    if (!initialSync && (!syncbackTasks || syncbackTasks.length === 0)) {
      return false;
    }

    const classSet = classNames({
      item: true,
      'expanded-sync': this.state.expanded,
      blink: this.state.blink,
    });

    const ellipses = [1, 2, 3].map(i => (
      <span key={`ellipsis${i}`} className={`ellipsis${i}`}>
        .
      </span>
    ));

    return (
      <div
        className={classSet}
        key="sync-activity"
        onClick={() => this.setState({ expanded: !this.state.expanded })}
      >
        <div className="inner clickable">Syncing your mailbox{ellipses}</div>
        {this.state.expanded ? this._renderExpandedDetails() : false}
      </div>
    );
  }
}