Class: Onebox::Engine::YoutubeOnebox

Inherits:
Object
  • Object
show all
Includes:
Onebox::Engine, StandardEmbed
Defined in:
lib/onebox/engine/youtube_onebox.rb

Instance Attribute Summary

Attributes included from Onebox::Engine

#errors, #options, #timeout, #uri, #url

Instance Method Summary collapse

Methods included from StandardEmbed

add_oembed_provider, add_opengraph_provider, #always_https?, oembed_providers, opengraph_providers, #raw

Methods included from Onebox::Engine

all_iframe_origins, engines, included, #initialize, origins_to_regexes

Instance Method Details

#parse_embed_response ⇒ Object 



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# File 'lib/onebox/engine/youtube_onebox.rb', line 16

def parse_embed_response
  return unless video_id
  return @parse_embed_response if defined?(@parse_embed_response)

  embed_url = "https://www.youtube.com/embed/#{video_id}"
  @embed_doc ||= Onebox::Helpers.fetch_html_doc(embed_url)

  begin
    script_tag =
      @embed_doc.xpath("//script").find { |tag| tag.to_s.include?("ytcfg.set") }.to_s
    match = script_tag.to_s.match(/ytcfg\.set\((?<json>.*)\)/)

    yt_json = ::JSON.parse(match[:json])
    renderer =
      ::JSON.parse(yt_json["PLAYER_VARS"]["embedded_player_response"])["embedPreview"][
        "thumbnailPreviewRenderer"
      ]

    title = renderer["title"]["runs"].first["text"]

    image = "https://img.youtube.com/vi/#{video_id}/hqdefault.jpg"
  rescue StandardError
    return
  end

  @parse_embed_response = { image: image, title: title }
end

#placeholder_html ⇒ Object 



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# File 'lib/onebox/engine/youtube_onebox.rb', line 44

def placeholder_html
  if video_id || list_id
    result = parse_embed_response
    result ||= get_opengraph.data

    "<img src='#{result[:image]}' width='#{WIDTH}' height='#{HEIGHT}' title='#{CGI.escapeHTML(result[:title])}'>"
  else
    to_html
  end
end

#to_html ⇒ Object 



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# File 'lib/onebox/engine/youtube_onebox.rb', line 55

def to_html
  if video_id
    "<iframe\nsrc=\"https://www.youtube.com/embed/\#{video_id}?\#{embed_params}\"\nwidth=\"\#{WIDTH}\"\nheight=\"\#{HEIGHT}\"\nframeborder=\"0\"\nallowfullscreen\nclass=\"youtube-onebox\"\n></iframe>\n"
  elsif list_id
    "<iframe\nsrc=\"https://www.youtube.com/embed/videoseries?list=\#{list_id}&wmode=transparent&rel=0&autohide=1&showinfo=1&enablejsapi=1\"\nwidth=\"\#{WIDTH}\"\nheight=\"\#{HEIGHT}\"\nframeborder=\"0\"\nallowfullscreen\nclass=\"youtube-onebox\"\n></iframe>\n"
  else
    # for channel pages
    html = Onebox::Engine::AllowlistedGenericOnebox.new(@url, @timeout).to_html
    return if Onebox::Helpers.blank?(html)
    html.gsub!(%r{['"]//}, "https://")
    html
  end
end

#video_title ⇒ Object 



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# File 'lib/onebox/engine/youtube_onebox.rb', line 87

def video_title
  @video_title ||=
    begin
      result = parse_embed_response || get_opengraph.data
      result[:title]
    end
end