def ssn(cls):
"""
Returns a 11 digits Belgian SSN called "rijksregisternummer" as a string
The first 6 digits represent the birthdate with (in order) year, month and day.
The second group of 3 digits is represents a sequence number (order of birth).
It is even for women and odd for men.
For men the range starts at 1 and ends 997, for women 2 until 998.
The third group of 2 digits is a checksum based on the previous 9 digits (modulo 97).
Divide those 9 digits by 97, subtract the remainder from 97 and that's the result.
For persons born in or after 2000, the 9 digit number needs to be proceeded by a 2
(add 2000000000) before the division by 97.
"""
# see http://nl.wikipedia.org/wiki/Burgerservicenummer (in Dutch)
def _checksum(digits):
res = 97 - (digits % 97)
return res
# Generate a date (random)
mydate = DateProvider.date()
# Convert it to an int
elms = mydate.split("-")
# Adjust for year 2000 if necessary
if elms[0][0] == '2':
above = True
else:
above = False
# Only keep the last 2 digits of the year
elms[0] = elms[0][2:4]
# Simulate the gender/sequence - should be 3 digits
seq = BaseProvider.random_int(1, 998)
# Right justify sequence and append to list
seq_str = "{:0>3}".format(seq)
elms.append(seq_str)
# Now convert list to an integer so the checksum can be calculated
date_as_int = int("".join(elms))
if above:
date_as_int += 2000000000
# Generate checksum
s = _checksum(date_as_int)
s_rjust = "{:0>2}".format(s)
# return result as a string
elms.append(s_rjust)
return "".join(elms)
