class Ox(object):
    def initialize(self):
        print "<?xml version='1.0'?>"
        print "<osm version='0.3' generator='OpenStreetMap Server'>"
    
    def add_node(self,node):
        nodestring = ""
        nodestring = "<node id='%s' lat='%s' lon='%s'" % (node['id'], node['lat'], node['lon'])
        if (node.has_key('timestamp')):
            nodestring = "%s timestamp='%s' visible='%s'" % (nodestring, node['timestamp'], node['visible'])
        if node.has_key('tags'):
            nodestring = "%s>" % nodestring
            print nodestring
            self.print_tags(node['tags'])
            print "</node>"
        else:
            nodestring =  "%s />" % nodestring
            print nodestring
    def add_segment(self, seg):
        segstring = "<seg id='%s' lat='%s' lon='%s'" % (seg['id'], seg['lat'], seg['lon'])
        if (seg.has_key('timestamp')):
            segstring = "%s timestamp='%s' visible='%s'" % (segstring, seg['timestamp'], seg['visible'])
        if seg.has_key('tags'):
            segstring = "%s>" % segstring
            print segstring
            self.print_tags(seg['tags'])
            print "</seg>"
        else:
            segstring =  "%s />" % segstring
            print segstring

        
    def add_multi(self,multi, type):
        print "<%s id='%s' timestamp='%s'>" % (type, multi['id'], multi['timestamp'])
        for i in multi['segs']:
            print "<seg id='%s' />" % i['id']
        self.print_tags(multi['tags'])
        print "</%s>"%type

    def print_tags(self,tags):
        if tags:
            for i in tags.split(";"):
                (k, v) = i.split("=")
                if (k and v):
                    k = k.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
                    v = v.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
                    print "<tag k='%s' v='%s' />" % (k, v)
    def finish(self):
        print "</osm>"
if __name__ == "__main__":
        o = Ox()
        o.initialize()
        o.add_node({'id':1, 'lat':2, 'lon':3, 'timestamp': 4, 'visible': 5, 'tags': "foo=bar;baz=qux"})
        o.add_node({'id':1, 'lat':2, 'lon':3, 'timestamp': 4, 'visible': 5})
        o.add_multi({'id':2, 'timestamp':'5', 'segs':[{'id':10}, {'id': 15}], 'tags':"foo=bar"}, "way")
        o.add_segment({'id':1, 'lat':2, 'lon':3})
        o.add_segment({'id':1, 'lat':2, 'lon':3, 'tags': "foo=bar>;baz=qux<"})
        o.add_segment({'id':1, 'lat':2, 'lon':3, 'tags': "foo=&;&=qux"})
        o.finish()