# -*- encoding: utf-8 -*-

module Genit

  # Replace each fragment in a page.
  class Fragment
  
    # Public: Constructor.
    #
    # file        - Full String filename of the page.
    # working_dir - The String working directory, where live the project.
    def initialize file, working_dir
      @page = HtmlDocument.open_fragment file
      @working_dir = working_dir
      HtmlDocument.genit_tags_from(@page).each do |tag|
        case tag['class']
          when 'fragment'
            @file = tag['file']
            replace_fragment 
        end
      end
    end
    
    # Public: Get the page in html format.
    #
    # Returns the html code of the page as a String.
    def to_html
      @page.to_html
    end
    
    private
    
    def replace_fragment
      builder = Builder.new(@page)
      @page = builder.replace(css_rule, content)
    end
    
    def css_rule
      "genit.fragment[file='#{@file}']"
    end
    
    def content
      full_path = File.join(@working_dir, 'fragments', @file)
      HtmlDocument.open_as_string(full_path)
    end
    
  end
  
end