Module: UrlToMediaTag

Defined in:
lib/url_to_media_tag.rb

Constant Summary collapse

VERSION = 
File.read( File.join(File.dirname(__FILE__),'..','VERSION') ).strip
VIDEO_DEFAULTS = 
{
  :width => 640,
  :height => 480,
  :class => "url-to-media-tag-video",
  :frameborder => 0
}

Class Method Summary collapse

Class Method Details

.convert(url, options = {}) ⇒ Object 



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# File 'lib/url_to_media_tag.rb', line 31

def self.convert(url, options={})
  options = options.dup

  # prevent any kind of html or xss
  return if url.include?('>') or url.include?('<')

  result = case url

  # youtube
  when /http:\/\/(www.)?youtube\.com\/watch\?v=([A-Za-z0-9._%-]*)(\&\S+)?|http:\/\/(www.)?youtu\.be\/([A-Za-z0-9._%-]*)?/
    options = merge_settings(:video, :vimeo, options)
    youtube_id = $2 || $5
    related_videos = "?rel=0" unless options.delete(:related_videos)
    video_iframe "http://www.youtube.com/embed/#{youtube_id}#{related_videos}", options

  # vimeo
  when /http:\/\/(www.)?vimeo\.com\/([A-Za-z0-9._%-]*)((\?|#)\S+)?/
    options = merge_settings(:video, :vimeo, options)

    vimeo_id = $2
    show_title = "title=0" unless options.delete(:show_title)
    show_byline = "byline=0" unless options.delete(:show_byline)
    show_portrait = "portrait=0" unless options.delete(:show_portrait)
    query_string_variables = [show_title, show_byline, show_portrait].compact.join("&")
    query_string = "?" + query_string_variables unless query_string_variables.empty?

    video_iframe "http://player.vimeo.com/video/#{vimeo_id}#{query_string}", options

  # image
  when /https?:\/\/\S+\.(jpe?g|gif|png|bmp|tif)(\?\S+)?/i
    options = merge_settings(:image, options)
    tag(:img, options.merge(:src => $&))
  end

  result = result.html_safe if result.respond_to?(:html_safe)
  result
end

.merge_settings(*args) ⇒ Object

:video, :x => 1, :settings => => {:width => 300} –> => 1, :width => 300



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# File 'lib/url_to_media_tag.rb', line 23

def self.merge_settings(*args)
  options = args.pop.dup
  raise unless options.kind_of?(Hash)
  settings = options.delete(:settings) || {}
  args.each{|type| options.merge!(settings[type] || {}) }
  options
end

.tag(name, options) ⇒ Object 



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# File 'lib/url_to_media_tag.rb', line 16

def self.tag(name, options)
  options = options.map{|k,v| "#{k}=\"#{v}\"" }.sort.join(" ")
  %{<#{name} #{options}></#{name}>}
end

.video_iframe(url, options) ⇒ Object 



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# File 'lib/url_to_media_tag.rb', line 11

def self.video_iframe(url, options)
  options = {:src => url}.merge(VIDEO_DEFAULTS).merge(options)
  tag(:iframe, options)
end