module UsersHelper

    # Returns the Gravatar for the given user.
    def gravatar_for(user, size: 80)
      gravatar_id  = Digest::MD5::hexdigest(user.email.downcase)
      gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{size}"
      image_tag(gravatar_url, alt: user.name, class: "gravatar")
    end
  end
  