OrderWorkflow.js

var { Workflow } = require("zenaton");
var GetPriceFromProviderA = require("./GetPriceFromProviderA");
var GetPriceFromProviderB = require("./GetPriceFromProviderB");
var GetPriceFromProviderC = require("./GetPriceFromProviderC");
var OrderFromProviderA = require("./OrderFromProviderA");
var OrderFromProviderB = require("./OrderFromProviderB");
var OrderFromProviderC = require("./OrderFromProviderC");

module.exports = Workflow("OrderWorkflow", function() {
  
  var prices = [
    new GetPriceFromProviderA(this.item),
    new GetPriceFromProviderB(this.item),
    new GetPriceFromProviderC(this.item)
  ].execute();
  
  switch (prices.indexOf(Math.min(...prices))) {
    case 0:
      new OrderFromProviderA(this.item).execute();
      break;
    case 1:
      new OrderFromProviderB(this.item).execute();
      break;
    case 2:
      new OrderFromProviderC(this.item).execute();
      break;
    }
});