module OpenGraphHelper
  def og_html(cache)
    "<a href=\"#{cache.url}\" target=\"_blank\">" +
    "  <div>" +
    "    <img src=\"#{cache.image}\" />" +
    "    <strong>#{cache.title}</strong>" +
    "    <p>#{truncate(cache.description, length: 250, separator: ' ')}</p>" +
    "  </div>" +
    "</a>"
  end

  def link_to_oembed_image(cache, prefix = 'thumbnail_')
    link_to(oembed_image_tag(cache, prefix), cache.url, :target => '_blank')
  end

  def oembed_image_tag(cache, prefix)
    image_tag(cache.data["#{prefix}url"], cache.options_hash(prefix))
  end
end