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import re
from .utils import validator
@validator
def card_number(value):
"""
Return whether or not given value is a valid card number.
This validator is based on Luhn algorithm.
.. luhn:
https://github.com/mmcloughlin/luhn
Examples::
>>> card_number('4242424242424242')
True
>>> card_number('4242424242424241')
ValidationFailure(func=card_number, args={'value': '4242424242424241'})
.. versionadded:: 0.15.0
:param value: card number string to validate
"""
try:
digits = list(map(int, value))
odd_sum = sum(digits[-1::-2])
even_sum = sum([sum(divmod(2 * d, 10)) for d in digits[-2::-2]])
return (odd_sum + even_sum) % 10 == 0
except ValueError:
return False
@validator
def visa(value):
"""
Return whether or not given value is a valid Visa card number.
Examples::
>>> visa('4242424242424242')
True
>>> visa('2223003122003222')
ValidationFailure(func=visa, args={'value': '2223003122003222'})
.. versionadded:: 0.15.0
:param value: Visa card number string to validate
"""
pattern = re.compile(r'^4')
return card_number(value) and len(value) == 16 and pattern.match(value)
@validator
def mastercard(value):
"""
Return whether or not given value is a valid Mastercard card number.
Examples::
>>> mastercard('5555555555554444')
True
>>> mastercard('4242424242424242')
ValidationFailure(func=mastercard, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: Mastercard card number string to validate
"""
pattern = re.compile(r'^(51|52|53|54|55|22|23|24|25|26|27)')
return card_number(value) and len(value) == 16 and pattern.match(value)
@validator
def amex(value):
"""
Return whether or not given value is a valid American Express card number.
Examples::
>>> amex('378282246310005')
True
>>> amex('4242424242424242')
ValidationFailure(func=amex, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: American Express card number string to validate
"""
pattern = re.compile(r'^(34|37)')
return card_number(value) and len(value) == 15 and pattern.match(value)
@validator
def unionpay(value):
"""
Return whether or not given value is a valid UnionPay card number.
Examples::
>>> unionpay('6200000000000005')
True
>>> unionpay('4242424242424242')
ValidationFailure(func=unionpay, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: UnionPay card number string to validate
"""
pattern = re.compile(r'^62')
return card_number(value) and len(value) == 16 and pattern.match(value)
@validator
def diners(value):
"""
Return whether or not given value is a valid Diners Club card number.
Examples::
>>> diners('3056930009020004')
True
>>> diners('4242424242424242')
ValidationFailure(func=diners, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: Diners Club card number string to validate
"""
pattern = re.compile(r'^(30|36|38|39)')
return (
card_number(value) and len(value) in [14, 16] and pattern.match(value)
)
@validator
def jcb(value):
"""
Return whether or not given value is a valid JCB card number.
Examples::
>>> jcb('3566002020360505')
True
>>> jcb('4242424242424242')
ValidationFailure(func=jcb, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: JCB card number string to validate
"""
pattern = re.compile(r'^35')
return card_number(value) and len(value) == 16 and pattern.match(value)
@validator
def discover(value):
"""
Return whether or not given value is a valid Discover card number.
Examples::
>>> discover('6011111111111117')
True
>>> discover('4242424242424242')
ValidationFailure(func=discover, args={'value': '4242424242424242'})
.. versionadded:: 0.15.0
:param value: Discover card number string to validate
"""
pattern = re.compile(r'^(60|64|65)')
return card_number(value) and len(value) == 16 and pattern.match(value)
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