#! /usr/bin/env python

""" Read/write configuration params from system configuration file initial.rdf """

__author__ = "Anand B Pillai"
__maintainer__ = "Anand B Pillai"
__version__ = "$Id: config.py 1974 2006-08-28 20:50:05Z abp $"

import sys, os
import xml.dom.minidom as mdom

def get_system_config():

    for f in ('initial.rdf', os.path.abspath(os.path.join(sys.prefix, 'initial.rdf'))):
        if os.path.isfile(f):
            return f

def parse_system_config():
    """ Parse system config file and return a DOM object """
    
    f = get_system_config()
    try:
        dom = mdom.parse(f)
        return dom
    except Exception, e:
        print e

def get_elem_data(name):
    """ Get the value (PCDATA) of element given by 'name' """

    dom = parse_system_config()
    elems = dom.getElementsByTagName('eiao:' + name)
    # Take only first
    if elems:
        elem = elems[0]
        textElem = elem.firstChild
        return str(textElem.data)

    return ''