Noosfero/noosfero

class DocItem
  class NotFound < Exception; end
  attr_accessor :id, :title, :text, :language, :order
  def initialize(attrs = {})
    attrs.each do |name, value|
      self.send("#{name}=", value)
    end
    self.language ||= "en"
  end

  def html(theme = nil)
    text.gsub(/<img src="([^"]+\.en\.png)"/) do |match|
      path = $1
      translation = find_image_replacement(path, theme)
      if translation
        "<img src=\"#{translation}\""
      else
        match
      end
    end.html_safe
  end

  private

    def find_image_replacement(image, theme)
      translation = image.sub(/\.en\.png$/, "." + language + ".png")
      search_path = [
        translation
      ]
      if theme
        search_path.unshift("/designs/themes/#{theme}#{translation}") # higher priority
        search_path.push("/designs/themes/#{theme}#{image}") # lower priority
      end
      search_path.find { |file| File.exist?(Rails.root.join("public", file[1..-1])) }
    end
end