Object-Oriented Modelling

class Recipe {
  // Has ingredients & steps
}


// Do we set properties when initializing?
class Recipe {
  constructor(ingredients, steps) {
    …
  }
}


// Do we allow setting properties after initializing?
class Recipe {
  setIngredients(ingredients) { … }
  setSteps(steps) { … }
}


// Do we allow both?
class Recipe {
  constructor(ingredients, steps) { … }
  setIngredients(ingredients) { … }
  setSteps(steps) { … }
}


// Recipes are made by chefs
class Chef {
  makeRecipe(recipe) {
    …
  }
}


// Does the chef turn on the oven?
class Chef {
  makeRecipe(recipe) {
    this.oven.turnOn();
    recipe.make();
  }
}


// Does the recipe turn on the oven only when needed?
class Chef {
  makeRecipe(recipe) {
    recipe.make(this.oven);
  }
}
class Recipe {
  make(oven) {
    if (this.needsOvenPreheated) {
      oven.turnOn();
    }
    …
  }
}


// Which class do we add the purchase ingredients method to?
purchaseIngredients(ingredients) {
  …
}

class Chef {
  purchaseIngredients(ingredients) { … }
}
class Manager {
  purchaseIngredients(ingredients) { … }
}
class Ingredients {
  purchase() { … }
}
class Shop {
  purchase(items) { … }
}