Flux Server Initialization

flux-server.js

var categories = new Promise(function(resolve, reject) {
  var onChange = function() {
    CategoryStore.removeChangeListener('change', onChange)

    resolve(CategoryStore.getAll())
  }

  CategoryStore.addChangeListener('change', onChange)
  CategoryActions.loadAll()
})

var products = new Promise(function(resolve, reject) {
  categories.then(function() {
    var category = CategoryStore.get(params.categoryId)

    var onChange = function() {
      ProductStore.removeChangeListener('change', onChange)

      resolve(ProductStore.getAllForCurrentCategory())
    }

    ProductStore.addChangeListener('change', onChange)
    ProductActions.loadCategory(category.id)
  })
})

Promise.props({
  categories: categories,
  products: products
}).then(function(data) {
  res.render('index', {data: data})
})