gistfile1.txt

package vendingmachine

class VendingMachine {
  var chocolateBar = 0
  var granolaBar = 0

  var totalMoney = 0.0

  def buy(product: String, money: Double): String = {
    if (!isProductAvailable(product)) {
      s"Sorry, product $product not available"
    } else if(isMoneyEnough(product, money)) {
      "Not enough money"
    } else completeRequest(product, money)
  }

  def isProductAvailable(product: String): Boolean = {
    val productQuantity = {
      if (product == "chocolate") chocolateBar
      else if (product == "granola") granolaBar
      else 0
    }
    productQuantity > 0
  }

  def isMoneyEnough(product: String, money: Double): Boolean = {
    val cost = if (product == "chocolate") 1.5 else 1
    money >= cost
  }


  def completeRequest(product: String,
    money: Double): String = {
    if (product == "chocolate") chocolateBar-=1 else granolaBar-=1
    totalMoney += money
    s"Enjoy your $product"
  }
}