Dashboard tiles

tiles.rb

class DashboardTile
  PARAMS = [
    :image, :name, :description, :count,
    :count_suffix, :status, :url, :url_class
  ]

  PARAMS.each do |param|
    define_method(param) { raise NotImplementedError }
    define_method(:"#{param}=") { raise NotImplementedError }
  end

  def initialize(options = {})
    PARAMS.each do |param|
      public_send(:"#{param}=", options[param])
    end
  end
end

class LessonTile
  def self.build(user)
    completed_count = Lesson.completed_by(user).count
    total_count = Lesson.for(user.default_locale).count

    DashboardTile.new({
      image: 'learn/lessons.png',
      name: 'Lessons',
      description: 'Learn how to use the Twitter Translation Center '\
        'and create better translations.',
      count: "#{completed_count}/#{total_count}",
      count_suffix: 'COMPLETE',
      status: completed_count == 0 ? 'Get Started' : 'Continue',
      url: lessons_path,
      url_class: completed_count >= total_count ? 'disabled' : '',
    })
  end
end

class FeedbackTile
  def self.build(user)
    feedback_count = TranslationFeedback.incomplete_for(user).count
    DashboardTile.new({
      image: 'learn/feedback.png',
      name: 'Feedback',
      description: 'Which translation do you think is approved for the given phrase?',
      count: feedback_count.to_s,
      count_suffix: 'AVAILABLE',
      status: 'Get Started',
      url: translation_feedbacks_path,
      url_class: feedback_count == 0 ? 'disabled' : '',
    })
  end
end

https://reviewboard.twitter.biz/r/178997/diff/1/?file=5680633#file5680633line3