def validate(number):
"""Checks to see if the number provided is a valid GTIN code. Will
validate GTIN-14, GTIN-13 (EAN-13), GTIN-12 (UPC-A), and GTIN-8 (EAN-8)
codes. This checks the length and the check bit but does not check whether
a known GS1 Prefix and company identifier are referenced."""
number = compact(number)
if not number.isdigit():
raise InvalidFormat()
if len(number) not in (14, 13, 12, 8):
raise InvalidLength()
if calc_check_digit(number[:-1]) != number[-1]:
raise InvalidChecksum()
return number
def to_isbn13(number):
"""Convert the number to ISBN-13 format."""
number = number.strip()
min_number = compact(number, convert=False)
if len(min_number) == 13:
return number # nothing to do, already ISBN-13
# put new check digit in place
number = number[:-1] + ean.calc_check_digit('978' + min_number[:-1])
# add prefix
if ' ' in number:
return '978 ' + number
elif '-' in number:
return '978-' + number
else:
return '978' + number
def to_isbn13(number):
"""Convert the number to ISBN-13 format."""
number = number.strip()
min_number = compact(number, convert=False)
if len(min_number) == 13:
return number # nothing to do, already ISBN-13
# put new check digit in place
number = number[:-1] + ean.calc_check_digit('978' + min_number[:-1])
# add prefix
if ' ' in number:
return '978 ' + number
elif '-' in number:
return '978-' + number
else:
return '978' + number
def to_isbn13(number):
"""Convert the number to ISBN-13 format."""
number = number.strip()
min_number = clean(number, ' -')
if len(min_number) == 13:
return number # nothing to do, already ISBN-13
if len(min_number) == 9:
number = '0' + number # convert from 9 to 10 digits
# put new check digit in place
number = number[:-1] + ean.calc_check_digit('978' + min_number[:-1])
# add prefix
if ' ' in number:
return '978 ' + number
elif '-' in number:
return '978-' + number
else:
return '978' + number
def to_isbn13(number):
"""Convert the number to ISBN-13 format."""
number = number.strip()
min_number = clean(number, ' -')
if len(min_number) == 13:
return number # nothing to do, already ISBN-13
if len(min_number) == 9:
number = '0' + number # convert from 9 to 10 digits
# put new check digit in place
number = number[:-1] + ean.calc_check_digit('978' + min_number[:-1])
# add prefix
if ' ' in number:
return '978 ' + number
elif '-' in number:
return '978-' + number
else:
return '978' + number
def validate_gtin(number, accepted_length=DEFAULT_ACCEPT_LENGTH):
"""
It's the same as stdnum.ean.validate() but also accept ISBN-10
"""
number = compact(number) # Convert to the minimal representation
if not isdigits(number):
raise InvalidFormat()
if len(number) not in accepted_length:
raise InvalidLength()
if len(number) == 10:
# Maybe a ISBN-10 number:
return isbn.validate(number)
if calc_check_digit(number[:-1]) != number[-1]:
raise InvalidChecksum()
return number
def generate_barcode_from_product_product(self):
self.ensure_one()
if self.barcode:
raise UserError(
_("The product '%s' already has a barcode.") %
self.display_name)
barcode_without_checksum = self.env['ir.sequence'].next_by_code(
'private.product.barcode')
if len(barcode_without_checksum) not in (7, 12):
raise UserError(
_("The sequence 'private.product.barcode' is not properly "
"configured. The generated sequence should have 7 digits "
"(for EAN-8) or 12 digits (for EAN-13). "
"It currently has %d digits." %
len(barcode_without_checksum)))
checksum = calc_check_digit(barcode_without_checksum)
barcode = barcode_without_checksum + str(checksum)
self.write({
'barcode': barcode,
'must_print_barcode': True,
})
def to_ean(number, issue_code='00'):
"""Convert the number to EAN-13 format."""
number = '977' + validate(number)[:-1] + issue_code
return number + ean.calc_check_digit(number)
def to_ean(number, issue_code='00'):
"""Convert the number to EAN-13 format."""
number = '977' + validate(number)[:-1] + issue_code
return number + ean.calc_check_digit(number)
def upce_to_upca(upce, validate=True):
""" Converts an UPC-E code to a 12 digit UPC-A code.
If code is 7 digits and first digit is not zero then will form 8 digit
code by pading left with a zero (assumes the left zero was lost somewhere
in conversion to int).
See:
https://stackoverflow.com/questions/31539005/how-to-convert-a-upc-e-barcode-to-a-upc-a-barcode
http://www.taltech.com/barcodesoftware/symbologies/upc
Args:
upce (str or int): The upce code. Will properly handle a 6 or 8 digit
code or an 8 digit code that lost its leading zero.
validate: Will validate the length of input, the 'S' leader digit if an 8
digit code, and the checksum (if given an 8 digit code).
Returns:
(str): The UPC-A code.
"""
given_upce = str(upce)
# can safely zero pad left a seven digit upce (is missing its left zero)
if (len(given_upce) == 7) and (given_upce[0] != '0'):
pad = '0'
else:
pad = ''
padded_upce = pad + given_upce
if validate:
if len(padded_upce) not in (6, 8):
raise ValueError("Provided UPC-E {} must be 6 or 8 digits!".format(
repr(given_upce)))
if (len(padded_upce) == 8 and padded_upce[0] not in ('0', '1')):
raise ValueError("8 digit UPC-E must begin with 0 or 1")
given_6_digit_upce = (len(padded_upce) == 6)
upce6 = padded_upce if given_6_digit_upce else padded_upce[1:7]
# upce6 digit names: abcdeN
map_id = int(upce6[-1]) # N
ab_prefix = upce6[0:2] # ab
if map_id >= 5:
core = upce6[2:5], '0' * 4, map_id # cde0000N
elif map_id <= 2:
core = map_id, '0' * 4, upce6[2:5] # N0000cde
elif map_id == 3:
core = upce6[2], '0' * 5, upce6[3:5] # c00000de
elif map_id == 4:
core = upce6[2:4], '0' * 5, upce6[4] # cd00000e
# ab + core
no_leader_no_checksum = ab_prefix + ''.join(map(str, core))
# add leader, also called 'S' digit
leader = '0' if given_6_digit_upce else padded_upce[0]
with_leader_no_checksum = leader + no_leader_no_checksum
if given_6_digit_upce:
with_checksum = with_leader_no_checksum\
+ ean.calc_check_digit(with_leader_no_checksum)
else:
with_checksum = with_leader_no_checksum + given_upce[-1]
if validate:
ean.validate(with_checksum)
return with_checksum
def barkod_tamamla(self, barkode):
ek = ean.calc_check_digit(str(barkode))
return str(barkode) + ek