private parseResponse(res: IGroupBuyResponse): GroupBuy {
    let items = res.Items || [];
    let skus = res.Skus || [];

    let skuMap = keyBy(skus, item => item.ID);
    let map: Dict<IGroupBuyItem> = {};
    let active: IGroupBuyItem[] = [];
    let inactive: IGroupBuyItem[] = [];
    items.sort((a, b) => a.Start - b.Start).forEach(item => {
      let sku = skuMap[item.SkuID];
      if (sku) {
        item.sku = sku;
        (item.End > Date.now() / 1000 ? active : inactive).push(item);
        map[item.SkuID] = item;
      }
    });
    return { items, map, active, inactive };
  }

 add(product: IProduct) {
   let index = this.getItems().findIndex(item => item.ProductID === product.ID);
   if (~index) {
     let id = this.getItems()[index].ID;
     this.getItems().splice(index, 1);
   }
   let item = {
     ID: 0,
     ProductID: product.ID,
     Name: product.Name,
     Img: product.Img || product.skus[0].Img,
     Price: product.skus[0].SalePrice,
     Vpn: product.Vpn,
   };
   this.getItems().unshift(item);
   if (this.getItems().length > MAX) {
     let map = keyBy(this._items.splice(MAX));
   }
   localStorage.setItem(historyKey, JSON.stringify(this._items));
 }

    job: 'Developer @ VTEX',
    link: 'https://github.com/mairatma',
    name: 'Maira Bello',
  },
  {
    avatar: require('../assets/graphics/contributors/ben.jpg'),
    bio: "A full time Elixir developer at CargoSense, Ben is a co-author of the Absinthe GraphQL implementation for Elixir.",
    job: 'Developer @ Cargosense',
    link: 'https://twitter.com/benwilson512',
    name: 'Ben Wilson',
  },
  {
    avatar: require('../assets/graphics/contributors/bruce.jpg'),
    bio:
      "Bruce is a polyglot technologist, speaker, and Pragmatic Bookshelf author. He's the CTO of CargoSense, a logistics intelligence company built on Elixir and committed to its open source community.",
    job: 'CTO @ Cargosense',
    link: 'https://twitter.com/wbruce',
    name: 'Bruce Williams',
  },
  {
    avatar: require('../assets/graphics/contributors/marcandre.jpg'),
    bio:
      "A Jazz guitarist turned developer, Marc-AndrĂŠ is currently working at Shopify, trying to make commerce better for everyone. When he's not hacking on Rails, GraphQL or Relay, he likes lifting heavy barbells above his head.",
    link: 'http://mgiroux.me',
    job: 'Senior Developer @ Shopify',
    name: 'Marc-Andre Giroux'
  }
]

export default keyBy(authors, 'name')

 ).map(([profile, res]: [IProfile, Response]) => {
   let items = keyBy(res.json(), (store: IStore) => store.ID) as Dict<IStore>;
   items[0] = { ID: 0, Name: profile.OfficialStoreName, CreatedAt: 0, User1: 0, Amap: null };
   return items;
 }).publishReplay(1).refCount();