module FoulBall
  def self.fair?(text="")
    return true if text.nil? || text.empty?
    down_text = text.downcase
    configuration.banned_words.none? { |w| down_text.include?(w.downcase) }
  end

  def self.foul(text)
    return [] if text.nil? || text.empty?
    down_text = text.downcase
    configuration.banned_words.select { |w| down_text.include?(w.downcase) }
  end
end