Class: HTML::Pipeline::YoutubeFilter

Inherits:
TextFilter
  • Object
show all
Defined in:
lib/html/pipeline/youtube/youtube_filter.rb

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object 



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# File 'lib/html/pipeline/youtube/youtube_filter.rb', line 4

def call
  # This filter converts youtube video's url into youtube iframe.
  #
  # Context options:
  #   :video_width - integer, sets iframe's width
  #   :video_height - integer, sets iframe's height
  #   :video_frame_border - integer, sets iframe border's width
  #   :video_wmode - string, sets iframe's wmode option
  #   :video_autoplay - boolean, whether video should autoplay
  #   :video_hide_related - boolean, whether shows related videos
  regex = /(?<=^|\s|<div>|<br>)https?:\/\/(?:www.)?(?:youtube\.com\/(?:embed\/|watch\?(?:feature=player_embedded&)?v=)|youtu\.be\/)([A-Za-z0-9_-]*)[&?\w-]*/
  @text.gsub(regex) do
    youtube_id = $1
    width = context[:video_width] || 420
    height = context[:video_height] || 315
    frameborder = context[:video_frameborder] || 0
    wmode = context[:video_wmode]
    autoplay = context[:video_autoplay] || false
    hide_related = context[:video_hide_related] || false
    src = "//www.youtube.com/embed/#{youtube_id}"
    params = []
    params << "wmode=#{wmode}" if wmode
    params << "autoplay=1" if autoplay
    params << "rel=0" if hide_related
    src += "?#{params.join '&'}" unless params.empty?

    # Prefix with two "\n" for compatibility with markup such as Markdown:
    %{\n\n<div class="video youtube"><iframe width="#{width}" height="#{height}" src="#{src}" frameborder="#{frameborder}" allowfullscreen></iframe></div>}
  end
end