Untitled

module AdminHelper

  def field_must_be_slug(element, separator = '-')
    render :update do |page|
      page << <<-rawJS
        var element = $('#{element.to_s}');
        new Form.Element.Observer(element, 0.02, function(){
          element.value = element.getValue().toLowerCase().gsub(/[^a-z0-9\\d\\s\\s+\\#{separator}]+/, '').gsub(/\\s+/,'#{separator}');
        });
      rawJS
    end
  end

  def auto_url_info(object, *args)
    options = args.shift || {}
    options[:slug_preparsing] ||= true
    options[:url_preview_id] ||= :url_preview

    initial_url = object.url.link(:full, "http://localhost:3000")
    slug_source_id = [object.class.name.underscore, "url", "attributes", "slug"].join("_")

    result = Array.new
    result << content_tag(:span, nil, :class => 'icon link')
    result << content_tag(:span, initial_url, :id => :url_preview)
    result << field_must_be_slug(slug_source_id) if options[:slug_preparsing]
    result << <<-rawJS
<script type="javascript">
        var makeNewUrl = function(){
          var newUrl = new Template('#{object.url.link(:js_template, @site, :object => object)}');
          var currentSlug = $('#{slug_source_id}').value.toSlug();
          var currentObjectName = '#{object.class.class_name.downcase}';

          if(currentSlug.length > 0 && currentObjectName != 'page') currentSlug = '/' + currentSlug;
          var showUrl = {
            slug: currentSlug
          };
          xtu = newUrl.evaluate(showUrl).split('://');
          newUrl = [xtu[0], xtu[1].gsub(/\\/+/, '/')].join('://');
          $('#{options[:url_preview_id].to_s}').update(newUrl);
        }
        new Form.Element.Observer('#{slug_source_id}', 0.02, makeNewUrl);
        makeNewUrl();
</script>
      rawJS
    end
    return result.join
  end
end