gistfile1.py

import re

LAN_REGEXP = re.compile('^([\w-]+),([\w-]+),?([\w-]+)?,?(\d+)?$')
CORE_REGEXP = LAN_REGEXP
ELINK_REGEXP = LAN_REGEXP
LINK_REGEXP = re.compile('^([\w-]+),?([\w-]+)?,?(\d+)?$')

def parse_ifDescr(ifDescr):
    type = ifDescr[:ifDescr.find(',')]
    print type
    if type not in ('lan','core','link','elink'):
        return None

    if type == 'lan':
        print "parsing string %s" % ifDescr[4:]
        data = LAN_REGEXP.findall(ifDescr[4:])
        if not data:
            return None
        return dict(zip(('organisation','usage','comment','vlan'), data[0]))
    elif type == 'core':
        print "parsing string %s" % ifDescr[5:]
        data = CORE_REGEXP.findall(ifDescr[5:])
        if not data:
            return None
        return dict(zip(('organisation','usage','comment','vlan'), data[0]))
    elif type == 'link':
        print "parsing string %s" % ifDescr[5:]
        data = LINK_REGEXP.findall(ifDescr[5:])
        if not data:
            return None
        return dict(zip(('to_router','comment','vlan'), data[0]))
    elif type == 'elink':
        print "parsing string %s" % ifDescr[6:]
        data = ELINK_REGEXP.findall(ifDescr[6:])
        if not data:
            return None
        return dict(zip(('to_router','to_organisation', 'comment','vlan'), data[0]))

    return None

# Test stuff

d = parse_ifDescr('lan,math,staff')
assert(d['organisation'] == 'math')
assert(d['usage'] == 'staff')

d = parse_ifDescr('lan,physics,students,campus_dragv,340')
assert(d['organisation'] == 'physics')
assert(d['usage'] == 'students')
assert(d['comment'] == 'campus_dragv')
assert(d['vlan'] == '340')

d = parse_ifDescr('lan,math,staff2,campus_lade')
assert(d['organisation'] == 'math')
assert(d['usage'] == 'staff2')
assert(d['comment'] == 'campus_lade')

d = parse_ifDescr('core,it,wlan')
assert(d['organisation'] == 'it')
assert(d['usage'] == 'wlan')

d = parse_ifDescr('core,it,fddi,manring,180')
assert(d['organisation'] == 'it')
assert(d['usage'] == 'fddi')
assert(d['comment'] == 'manring')
assert(d['vlan'] == '180')

d = parse_ifDescr('link,mts-gw')
assert(d['to_router'] == 'mts-gw')

d = parse_ifDescr('link,moholt-gw,Tn_20022350,923')
assert(d['to_router'] == 'moholt-gw')
assert(d['comment'] == 'Tn_20022350')
assert(d['vlan'] == '923')

d = parse_ifDescr('elink,trd-gw,uninett')
assert(d['to_router'] == 'trd-gw')
assert(d['to_organisation'] == 'uninett')

d = parse_ifDescr('elink,sintef-gw,sintef,,902')
assert(d['to_router'] == 'sintef-gw')
assert(d['to_organisation'] == 'sintef')
assert(d['vlan'] == '902')