copy_list.rb

copy_list.rb

class CopyList

  attr_reader :list, :new_name

  def initialize(list, new_name)
    @list = list
    @new_name = new_name
  end

  def call
    new_list = List.new(list.dup.attributes.merge(name: new_name))
    copy_categories(list, new_list)

    new_list.save
    new_list
  end

  private
  
  def copy_categories(list, new_list)
    list.categories.each do |category|
      new_category = Category.new(category.dup.attributes)
      new_list.categories << new_category
      copy_items(category, new_category)
    end
  end

  def copy_items(category, new_category)
    category.items.each do |item|
      new_category.items << Item.new(item.dup.attributes)
    end
  end
end