def initialize():
    print "<?xml version='1.0'?>"
    print "<osm version='0.3' generator='OpenStreetMap Server'>"

def add_node(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
        print_tags(node['tags'])
        print "</node>"
    else:
        nodestring =  "%s />" % nodestring
        print nodestring
def add_segment( seg):
    segstring = "<seg id='%s' from='%s' to='%s'" % (seg['id'], seg['from'], seg['to'])
    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
        print_tags(seg['tags'])
        print "</seg>"
    else:
        segstring =  "%s />" % segstring
        print segstring

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

def print_tags(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():
    print "</osm>"
if __name__ == "__main__":
        initialize()
        add_node({'id':1, 'lat':2, 'lon':3, 'timestamp': 4, 'visible': 5, 'tags': "foo=bar;baz=qux"})
        add_node({'id':1, 'lat':2, 'lon':3, 'timestamp': 4, 'visible': 5})
        add_multi({'id':2, 'timestamp':'5', 'segs':[{'id':10}, {'id': 15}], 'tags':"foo=bar"}, "way")
        add_segment({'id':1, 'lat':2, 'lon':3})
        add_segment({'id':1, 'lat':2, 'lon':3, 'tags': "foo=bar>;baz=qux<"})
        add_segment({'id':1, 'lat':2, 'lon':3, 'tags': "foo=&;&=qux"})
        finish()