require 'rubygems'
require_gem 'builder'
require File.join(File.dirname(__FILE__), 'libxml_loader')

module S33r
  # For manipulating logging directives on resources
  # (see http://docs.amazonwebservices.com/AmazonS3/2006-03-01/LoggingHowTo.html).
  # 
  # Creating a LoggingResource instance using new and no arguments will generate a "blank" instance;
  # this can be put to the ?logging URL for a resource to remove logging from it.
  class LoggingResource
    attr_reader :log_target, :log_prefix
  
    def initialize(log_target=nil, log_prefix=nil)
      @log_target = log_target
      @log_prefix = log_prefix
    end
    
    # Generate a BucketLoggingStatus XML document for putting to the ?logging
    # URL for a resource.
    # 
    #-- TODO: test generates correct XML
    def to_xml
      xml_str = ""
      xml = Builder::XmlMarkup.new(:target => xml_str, :indent => 0)
      
      xml.instruct!
      
      # BucketLoggingStatus XML.
      xml.BucketLoggingStatus({"xmlns" => RESPONSE_NAMESPACE_URI}) {
        unless @log_target.nil? and @log_prefix.nil?
          xml.LoggingEnabled {
            xml.TargetBucket @log_target
            xml.TargetPrefix @log_prefix
          }
        end
      }
      
      xml_str
    end
    
  end
end