# This plugin is used to generate a photo gallery from a given description file
# author: Jan-David Quesel
module Jekyll
  # Workaround for commit 5b680f8dd80aac1 in jekyll (remove orphaned files in destination)
  # that deletes all the files created by plugins.
  class Site
    def cleanup
    end
  end

  class GalleryTag < Liquid::Tag
    # The options that are passed to bibtex2html

    def split_params(params)
      params.split(" ").map(&:strip)
    end

    def initialize(tag_name, params, tokens)
      super
      args = split_params(params)
      @dir = args[0]
      @desc = args[1]
      p "Processing: " + @desc
    end

    def render(context)

      # get the complete paths for the style file and the source file
      dirpath = File.join(context['site']['source'], @dir)

      outputfile = File.join(context['site']['destination'], context['page']['url'])
      outputdir = File.dirname(outputfile)

      # ensure that the destination directory exists
      FileUtils.mkdir_p(outputdir)

      # enter the destination directory
      Dir.chdir(outputdir) do
		  out_file = File.open(outputfile, 'w')
		  out_file.puts '<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js" type="text/javascript"></script>'
		  out_file.puts '<link type="text/css" rel="stylesheet" href="' + context['site']['url'] + '/galleria/themes/classic/galleria.classic.css">'
		  out_file.puts '<script src="' + context['site']['url'] + '/galleria/galleria-1.2.8.js" type="text/javascript"></script>'
		  out_file.puts '<script src="' + context['site']['url'] + '/galleria/galleria-1.2.8.min.js" type="text/javascript"></script>'
		  out_file.puts "<div id=\"galleria\">"

	      IO.foreach( File.join(context['site']['source'], @desc) ).each do |line|
			array = line.split(';')
			out_file.puts "<img src=\"" + context['site']['url'] + "/" + @dir + "/thumbs/" + array[0] + "\" data-big=\"" + context['site']['url'] + "/" + @dir + "/" + array[0] + "\" data-title=" + array[1] + " data-description=" + array[2] + ">\n"
		  end

		  out_file.puts "</div>"

		  out_file.puts '<a id="fullscreen">View Images Fullscreen</a>'

		  out_file.puts '<script>'
    	  out_file.puts 'Galleria.loadTheme(\'' + context['site']['url'] + '/galleria/themes/classic/galleria.classic.min.js\');'
    	  out_file.puts 'Galleria.run(\'#galleria\');'
    	  out_file.puts '$(\'#fullscreen\').click(function() {'
		  out_file.puts '$(\'#galleria\').data(\'galleria\').toggleFullscreen(); // toggles the fullscreen'
		  out_file.puts '});'
		  out_file.puts '</script>'

		  out_file.close

          # return the produced output
          IO.read(outputfile)
      end
    end
  end
end
Liquid::Template.register_tag('gallery', Jekyll::GalleryTag)