text: """
      Copyright (c) 2015 Ad Schellevis <ad@opnsense.org>
      All rights reserved.
  
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions are met:
  
      1. Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.
  
      2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
  
      THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
      INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
      AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
      AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
      OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
      SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      POSSIBILITY OF SUCH DAMAGE.
  
      --------------------------------------------------------------------------------------
  
      package : configd
      function: config handler
  """
  import os
  import stat
  import collections
  import copy
  import xml.etree.cElementTree as ElementTree
  
  __author__ = 'Ad Schellevis'
  
  
  class Config(object):
      def __init__(self, filename):
          self._config_data = {}
          self._filename = filename
          self._file_mod = 0
  
          self._load()
  
      def _load(self):
          """ load config ( if timestamp is changed ), stores all found uuids into an item __uuid__ at the config root
  
          :return:
          """
          mod_time = os.stat(self._filename)[stat.ST_MTIME]
          if self._file_mod != mod_time:
              xml_node = ElementTree.parse(self._filename)
              root = xml_node.getroot()
              # initialize uuid containers, holds references to all uuid tagged items and names in the xml
              self.__uuid_data = {}
              self.__uuid_tags = {}
              self._config_data = self._traverse(root)
              self._config_data['__uuid__'] = self.__uuid_data
              self._config_data['__uuid_tags__'] = self.__uuid_tags
              self._file_mod = mod_time
  
      def _traverse(self, xml_node):
          """ traverse xml node and return ordered dictionary structure
          :param xml_node: ElementTree node
          :return: collections.OrderedDict
          """
          this_item = collections.OrderedDict()
          if len(list(xml_node)) > 0:
              for item in list(xml_node):
                  item_content = self._traverse(item)
                  if 'uuid' in item.attrib:
                      self.__uuid_data[item.attrib['uuid']] = item_content
                      self.__uuid_tags[item.attrib['uuid']] = item.tag
                  if item.tag in this_item:
                      if type(this_item[item.tag]) != list:
                          tmp_item = copy.deepcopy(this_item[item.tag])
                          this_item[item.tag] = []
                          this_item[item.tag].append(tmp_item)
  
                      if item_content is not None:
                          # skip empty fields
                          this_item[item.tag].append(item_content)
                  elif item_content is not None:
                      # create a new named item
                      this_item[item.tag] = self._traverse(item)
          else:
              # last node, return text
              return xml_node.text
  
          return this_item
  
      def indent(self, elem, level=0):
          """ indent cElementTree (prettyprint fix)
              used from : http://infix.se/2007/02/06/gentlemen-indent-your-xml
              @param elem: cElementTree
              @param level: Currentlevel
          """
          i = "\n" + level * "  "
          if len(elem):
              if not elem.text or not elem.text.strip():
                  elem.text = i + "  "
              for e in elem:
                  self.indent(e, level + 1)
                  if not e.tail or not e.tail.strip():
                      e.tail = i + "  "
              # noinspection PyUnboundLocalVariable
              if not e.tail or not e.tail.strip():
                  e.tail = i
          else:
              if level and (not elem.tail or not elem.tail.strip()):
                  elem.tail = i
  
      def get(self):
          """ get active config data, load from disc if file in memory is different
  
          :return: dictionary
          """
          # refresh config if source xml is changed
          self._load()
  
          return self._config_data
  