def gen_giftcard_secret(length):
charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
while True:
code = get_random_string(length=length, allowed_chars=charset)
if not banned(code) and not GiftCard.objects.filter(
secret=code).exists():
return code
def _generate_random_code(prefix=None):
charset = list('ABCDEFGHKLMNPQRSTUVWXYZ23456789')
rnd = None
while not rnd or banned(rnd):
rnd = get_random_string(length=settings.ENTROPY['voucher_code'],
allowed_chars=charset)
if prefix:
return prefix + rnd
return rnd
def assign_identifier(self):
charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ23456789')
iteration = 0
length = settings.ENTROPY['customer_identifier']
while True:
code = get_random_string(length=length, allowed_chars=charset)
iteration += 1
if banned(code):
continue
if not Customer.objects.filter(identifier=code).exists():
self.identifier = code
return
if iteration > 20:
# Safeguard: If we don't find an unused and non-banlisted code within 20 iterations, we increase
# the length.
length += 1
iteration = 0