PhoneGenerator.rb

class PhoneGenerator
  def self.generate_landline
    area_code = AREA_CODES.values.sample
    if area_code.is_a?(Array)
      area_code = area_code.sample
    end
    create_phone(area_code, six_digit_extension)
  end

  def self.generate_mobile
    leading = ['6','7'].sample
    create_phone(leading, eight_digit_extension)
  end

  def self.generate_toll_fee
    leading = ['900','800'].sample
    create_phone(leading, six_digit_extension)
  end

  def self.generate_premium
    leading = ['902','802'].sample
    create_phone(leading, six_digit_extension)
  end

  def self.create_phone(leading,extension)
    Phone.new([leading,extension].join)
  end
  
  private
  
    def six_digit_extension
      6.times.map{ rand(0..9) }.join
    end

    def eight_digit_extension
      8.times.map{ rand(0..9) }.join
    end
end