#!/usr/bin/env python
"""
this script fetches single nodes from a eventmanagement xml file
"""
from xml.dom.minidom import parse


class NotTextNodeError:
    pass


def getTextFromNode(node):
    """
    scans through all children of node and gathers the
    text. if node has non-text child-nodes, then
    NotTextNodeError is raised.
    """
    t = ""
    for n in node.childNodes:
        if n.nodeType == n.TEXT_NODE:
            t += n.nodeValue
        else:
            raise NotTextNodeError
    return t


def nodeToDic(node):
    """
    nodeToDic() scans through the children of node and makes a
    dictionary from the content.
    three cases are differentiated:
    - if the node contains no other nodes, it is a text-node
    and {nodeName:text} is merged into the dictionary.
    - if there is more than one child with the same name
    then these children will be appended to a list and this
    list is merged to the dictionary in the form: {nodeName:list}.
    - else, nodeToDic() will call itself recursively on
    the nodes children (merging {nodeName:nodeToDic()} to
    the dictionary).
    """
    dic = {} 
    multlist = {} # holds temporary lists where there are multiple children
    for n in node.childNodes:
        multiple = False 
        if n.nodeType != n.ELEMENT_NODE:
            continue
        # find out if there are multiple records    
        if len(node.getElementsByTagName(n.nodeName)) > 1:
            multiple = True 
            # and set up the list to hold the values
            if not multlist.has_key(n.nodeName):
                multlist[n.nodeName] = []
        
        try:
            #text node
            text = getTextFromNode(n).strip().encode('utf-8')
        except NotTextNodeError:
            if multiple:
                # append to our list
                multlist[n.nodeName].append(nodeToDic(n))
                dic.update({n.nodeName:multlist[n.nodeName]})
                continue
            else: 
                # 'normal' node
                dic.update({n.nodeName:nodeToDic(n)})
                continue

        # text node
        if multiple:
            multlist[n.nodeName].append(text)
            dic.update({n.nodeName:multlist[n.nodeName]})
        else:
            dic.update({n.nodeName:text})
    return dic


def readConfig(filename):
    dom = parse(filename)
    return nodeToDic(dom)



if __name__ == "__main__":
    dic = readConfig("source.xml")
    xmltags = ["INFORMATION", "WANN_START_XML", "WANN_ENDE", "WO_XML", "WAS_XML", "RUBRIK_XML", "SONSTIGES"]
    print
    print "Database", dic["FMPDSORESULT"]["DATABASE"]
    #for item in dic["Config"]["Items"]["Item"]:
    entry = 0
    days = 0
    for item in dic["FMPDSORESULT"]["ROW"]:
        entry += 1
        print entry
        if len(item["DATUM"]) > 1:
            days +=1
            print "Datum: %s" % item["DATUM"]
        for content in xmltags:
            print ("%s: %s") % (content, item[content])
        print
    
    print "Tage: %s" % days