# Title: Simple Video tag for Jekyll
 # Author: Brandon Mathis http://brandonmathis.com
 # Description: Easily output MPEG4 HTML5 video with a flash backup.
 #
 # Syntax {% video url/to/video [width height] [url/to/poster] %}
 #
 # Example:
 # {% video http://site.com/video.mp4 720 480 http://site.com/poster-frame.jpg %}
 #
 # Output:
 # <video width='720' height='480' preload='none' controls poster='http://site.com/poster-frame.jpg'>
 #   <source src='http://site.com/video.mp4' type='video/mp4; codecs=\"avc1.42E01E, mp4a.40.2\"'/>
 # </video>
 #
 
 module Jekyll
 
   class VideoTag < Liquid::Tag
     @video = nil
     @poster = ''
     @height = ''
     @width = ''
 
     def initialize(tag_name, markup, tokens)

       if markup =~ /(https?:\S+)(\s+(https?:\S+))?(\s+(https?:\S+))?(\s+(\d+)\s(\d+))?(\s+(https?:\S+))?/i
         @video  = [$1, $3, $5].compact
         @width  = $7
         @height = $8
         @poster = $10

       end
       super
     end
 
     def render(context)
       output = super

       type = {
         'mp4' => "type='video/mp4; codecs=\"avc1.42E01E, mp4a.40.2\"'",
         'ogv' => "type='video/ogg; codecs=theora, vorbis'",
         'webm' => "type='video/webm; codecs=vp8, vorbis'"
       }
       if @video.size > 0

         video =  "<video width='#{@width}' height='#{@height}' preload='none' controls poster='#{@poster}'>"

         @video.each do |v|
           t = v.match(/([^\.]+)$/)[1]
           video += "<source src='#{v}' #{type[t]}>"
         end
         video += "</video>"

       else

         "Error processing input, expected syntax: {% video url/to/video [url/to/video] [url/to/video] [width height] [url/to/poster] %}"

       end
     end
   end
 end
 
 Liquid::Template.register_tag('video', Jekyll::VideoTag)