fiedl/your_platform

module RssHelper

  def generate_rss_feed(xml, args = {})
    args[:root_element] || raise(ActionController::ParameterMissing, 'no :root_element given')
    args[:items] || raise(ActionController::ParameterMissing, 'no :items given')

    description = args[:root_element].description if args[:root_element].respond_to? :description
    description ||= args[:root_element].content if args[:root_element].respond_to? :content

    # http://railscasts.com/episodes/87-generating-rss-feeds-revised?autoplay=true
    #
    xml.instruct! :xml, version: "1.0"
    xml.rss version: "2.0", 'xmlns:content' => "http://purl.org/rss/1.0/modules/content/", 'xmlns:itunes' => "http://www.itunes.com/dtds/podcast-1.0.dtd" do
      xml.channel do
        xml.title args[:root_element].title
        xml.description description
        xml.pubDate args[:root_element].published_at.to_s(:rfc822) if args[:root_element].published_at
        xml.link url_for(args[:root_element])
        xml.generator "https://github.com/fiedl/your_platform"
        xml.language args[:root_element].locale || Setting.preferred_locale || I18n.default_locale

        xml.itunes :image, href: logo_url('logo-icon')
        xml.itunes :type, 'serial'
        xml.itunes :author, args[:root_element].title

        args[:items].each do |item|
          xml.item do
            xml.title item.title
            xml.description item.content_without_video_url
            xml.pubDate item.published_at.to_s(:rfc822) if item.published_at
            xml.link url_for(item)
            xml.guid url_for(item)
            xml.tag! 'content:encoded' do
              xml.cdata! ((image_tag(item.teaser_image_url).html_safe if item.respond_to? :teaser_image_url and item.teaser_image_url).to_s + item.teaser_text.to_s)
            end

            xml.enclosure url: blog_post_url(item, format: 'mp4'), length: 0, type: "video/mp4"
            xml.itunes :image, href: logo_url('logo-icon')
            xml.itunes :subtitle, item.teaser_text

          end
        end
      end
    end
  end

  def rss_button(url = nil, options = {})
    url ||= rss_default_url
    icon = rss_icon
    icon = podcast_icon if url.include? "podcast.rss"
    link_to url, class: 'btn btn-outline-secondary btn-xs' do
      icon + options[:title].to_s
    end
  end

  def rss_default_url
    rss_url("default")
  end

  def rss_url(id = "default")
    protocol = (id == "podcast") ? 'pcast' : nil
    feed_url(id: id, format: 'rss', token: current_user.try(:token), protocol: protocol)
  end

end