gistfile1.rb

module CommentSpamValidator

  def self.included(model)
    model.class_eval do
      before_save :check_if_spam?
     end
  end

  def mark_as_spam
    self.spam = true
  end

  def content_method
    if self.respond_to? :content
      self.content     
    else
      self.texto
    end
  end

  def filtered_words
    filtered(:words)
  end

  def filtered_emails
    filtered(:emails)
  end
  
  def filtered(kind)
    return spam_options.send("filtered_#{kind}").split("\n") if spam_options
    []
  end

  def spam_options
    @spam_options ||= SpamOptions.first
  end

  def spamming_words
    filtered_words.inject(0){|sum, current| sum += (content_method.include?(current) ? 1 : 0 ) }
  end

  def contains_filtered_emails?
    filtered_emails.include? self.email
  end

  def check_if_spam?
   if spamming_words > 2 or contains_filtered_emails?
     mark_as_spam
   end
  end

  def spammed?
    self.class.find(:all, :conditions => "spam is true")
  end

end