module ApplicationHelper
  
  def render_sidebar(partial_name, collection)
    render(:partial => "sidebars/#{partial_name}") unless collection.nil?
  end

  ##
  # Show an HTML list of links to available mp3, and mp4 content
  # for this episode.
  #
  def media_links(episode)
    links = []
    %w(mp3 mp4).each do |media_type|
      if episode.send("has_#{media_type}")
        # Add a link to the item, plus the size.
        #
        # MP3 18.3 MB
        links << "#{link_to(media_type.upcase, episode.send("#{media_type}_url"))} #{human_size(episode.send("#{media_type}_length"))}"
      end
    end

    %(<div class="media_links">Download: #{ links.join(" | ") }</div>)
  end
  
  def textilize(text='')
    r = RedCloth.new text
    r.hard_breaks = false # use <p> instead of <br />
    r.to_html
  end

  def page_title
    @episode.nil? ? "Ruby on Rails Podcast" : "#{@episode.title} | the Ruby on Rails Podcast"
  end
  
end