Quick Podcast Feed with Ruby’s Builder Gem

podcast.xml.builder

xml.instruct! :xml, version: "1.0"

rss_attributes = {
  "version" => "2.0",
  "xmlns:dc" => "http://purl.org/dc/elements/1.1/",
  "xmlns:sy" => "http://purl.org/rss/1.0/modules/syndication/",
  "xmlns:atom" => "http://www.w3.org/2005/Atom",
  "xmlns:rdf" => "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
  "xmlns:content" => "http://purl.org/rss/1.0/modules/content/",
  "xmlns:itunes" => "http://www.itunes.com/dtds/podcast-1.0.dtd",
  "xmlns:media" => "http://search.yahoo.com/mrss/"
}

xml.rss rss_attributes do
  xml.channel do
    xml.title podcast.title
    xml.language "en-GB"
    xml.description podcast.description

    xml.link podcast_feed_url
    xml.atom :link, href: podcast_feed_url, rel: "self", type: "application/rss+xml"

    xml.itunes :author, podcast.author.name
    xml.itunes :subtitle, podcast.subtitle
    xml.itunes :explicit, "clean"
    xml.itunes :category, text: podcast.category
    xml.itunes :image, href: podcast.artwork.url(w: 1500, h: 1500, fit: :crop)

    xml.itunes :owner do
      xml.itunes :name, podcast.owner.name
      xml.itunes :email, podcast.email
    end

    podcast.episodes.each do |episode|
      xml.item do
        xml.title episode.title
        xml.description episode.description
        xml.pubDate episode.date.rfc2822
        xml.guid podcast_episode_url(episode), isPermaLink: true
        xml.link podcast_episode_url(episode)

        xml.itunes :author, episode.author.name
        xml.itunes :subtitle, episode.subtitle
        xml.itunes :duration, episode.audio.duration
        xml.itunes :image, href: episode.artwork.url(w: 1500, h: 1500, fit: :crop)
        xml.itunes :explicit, "clean"

        xml.enclosure url: episode.audio.url, length: episode.audio.size, type: "audio/mpeg"
        xml.media :content, url: episode.audio.url, type: "audio/mpeg"
      end
    end
  end
end