class Page < ActiveRecord::Base
  extend FriendlyId
  friendly_id :title, use: :slugged

  before_save :set_template_path
  after_create :create_template_file
  after_update :move_template_file
  after_destroy :remove_template_file

  validates :title, :slug, uniqueness: true, presence: true

  has_many :content_blocks

  private

  def set_template_path
    @old_template_path = attribute_was(:template_path)
    self.template_path = "#{Rails.root}/app/views/pages/#{self.slug}.html.erb"
  end

  def create_template_file
    %x(touch #{self.template_path})
  end

  def move_template_file
    %x(mv #{@old_template_path} #{self.template_path})
  end

  def remove_template_file
    %x(rm #{self.template_path})
  end
end