module ArticlesHelper
  # useful for highlighting attributes, when synchronizing articles
  def highlight_new(unequal_attributes, attribute)
    return unless unequal_attributes

    unequal_attributes.has_key?(attribute) ? 'background-color: yellow' : ''
  end

  def row_classes(article)
    classes = []
    classes << 'unavailable' unless article.availability
    classes << 'just-updated' if article.recently_updated && article.availability
    classes.join(' ')
  end
end