import xml.dom.minidom as minidom
import urllib

def get_person(url):

    foaf_url = url
    
    foaf = "http://xmlns.com/foaf/0.1/"                  # FOAF Namespace
    rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"  # RDF Namespace
    
    u = urllib.urlopen(foaf_url)                         # Load file
    doc = minidom.parseString(u.read())                  # XML Parse
    u.close()                                            # Close file
    
    # Search through all foaf:PersonalProfileDocuments, looking for one
    # which is about this doc (rdf:about="") and which has a maker element
    
    ppds = doc.getElementsByTagNameNS(foaf, "PersonalProfileDocument")
    ppd = None
    for i in ppds:
        if (i.getAttributeNodeNS(rdf, "about").value==u''):
            ppd = i
            break
    
    target = None
    if ppd:
        maker = ppd.getElementsByTagNameNS(foaf,"maker")[0]
        if maker:
            type, value = maker.attributes.items()[0]
    
        people = doc.getElementsByTagNameNS(foaf, "Person")
        
        for i in people:
            try:
                if ("nodeID" in type):
                    # rdf:nodeID="nodename"
                    if (i.getAttributeNode(type).value == value):
                        target = i
                        break
                if ("resource" in type):
                    # rdf:resource="#nodename", rdf:ID="nodename"
                    if (value[1:] == i.getAttributeNodeNS(rdf,"ID").value):
                        target = i
                        break
                    if (value == i.getAttributeNodeNS(rdf,"resource").value):
                        target = i
                        break
            except Exception, E:
                pass
    if not target:
        people = doc.getElementsByTagNameNS(foaf, "Person")
        target = people[0]
    
    person = {}
    
    # Create a dict of common variables needed.
    for i in ["nick","name","aimChatID","yahooChatID",
              "msnChatID","jabberID"]:
        elements = target.getElementsByTagNameNS(foaf,i)
        if (len(elements) > 0 and elements[0].parentNode == target):
            person[i] = elements[0].firstChild.nodeValue
    for i in ["homepage", "weblog"]:
        elements = target.getElementsByTagNameNS(foaf,i)
        if (len(elements) > 0 and elements[0].parentNode == target):
            person[i] = elements[0].getAttributeNodeNS(rdf,"resource").value
        
    return person

if __name__=="__main__":
    import sys
    print get_person(sys.argv[1])