state.js

import EventPublisher from '../../shared/libraries/event-publisher'

export default class State extends EventPublisher {
  constructor() {
    super();
    this.selectedSheet = null;
    this.sheets = [];
  }

  addSheet(sheet) {
    this.sheets = [...this.sheets, sheet].sort((a, b) => b.stats.mtime - a.stats.mtime);
    this.publish('changed');
  }

  selectSheet(sheet) {
    this.selectedSheet = sheet;
    this.publish('changed');
  }
}