Strategy pattern to follow users

user.rb

class User < Struct.new(:username, :private)
  alias_method :private?, :private

  def follow
    follow_strategy.call
  end

private

  def follow_strategy
    if private?
      PrivateFollow.new(self)
    else
      NormalFollow.new(self)
    end
  end
end

class NormalFollow
  def initialize(user)
    @user = user
  end

  def call
    # actually_follow code
  end
end

class PrivateFollow < NormalFollow
  def call
    super if confirm_follow
  end

private

  def confirm_follow
    # actual code
  end
end