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# ncf.py - functions for handling Dominican Republic invoice numbers
# coding: utf-8
#
# Copyright (C) 2017-2018 Arthur de Jong
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
# Development of this functionality was funded by iterativo | http://iterativo.do
"""NCF (Números de Comprobante Fiscal, Dominican Republic receipt number).
The NCF is used to number invoices and other documents for the purposes of
tax filing. The number is 19 digits long and consists of a letter (A or P) to
indicate that the number was assigned by the taxpayer or the DGIT, followed a
2-digit business unit number, a 3-digit location number, a 3-digit mechanism
identifier, a 2-digit document type and a 8-digit serial number.
More information:
* https://www.dgii.gov.do/
>>> validate('B0100000005') # format since 2018-05-01
'B0100000005'
>>> validate('A020010210100000005') # format before 2018-05-01
'A020010210100000005'
>>> validate('Z0100000005')
Traceback (most recent call last):
...
InvalidFormat: ...
"""
import json
from stdnum.exceptions import *
from stdnum.util import clean, get_soap_client
def compact(number):
"""Convert the number to the minimal representation. This strips the
number of any valid separators and removes surrounding whitespace."""
return clean(number, ' ').strip().upper()
# The following document types are known:
# 01 invoices for fiscal declaration (or tax reporting)
# 02 invoices for final consumer
# 03 debit note
# 04 credit note (refunds)
# 11 informal supplier invoices (purchases)
# 12 single income record
# 13 minor expenses invoices (purchases)
# 14 invoices for special customers (tourists, free zones)
# 15 invoices for the government
def validate(number):
"""Check if the number provided is a valid NCF."""
number = compact(number)
if len(number) == 11:
if number[0] != 'B' or not number[1:].isdigit():
raise InvalidFormat()
elif len(number) == 19:
if number[0] not in 'AP' or not number[1:].isdigit():
raise InvalidFormat()
else:
raise InvalidLength()
if number[-10:-8] not in (
'01', '02', '03', '04', '11', '12', '13', '14', '15'):
raise InvalidComponent()
return number
def is_valid(number):
"""Check if the number provided is a valid NCF."""
try:
return bool(validate(number))
except ValidationError:
return False
def _convert_result(result): # pragma: no cover
"""Translate SOAP result entries into dictionaries."""
translation = {
'NOMBRE': 'name',
'COMPROBANTE': 'proof',
'ES_VALIDO': 'is_valid',
'MENSAJE_VALIDACION': 'validation_message',
'RNC': 'rnc',
'NCF': 'ncf',
}
return dict(
(translation.get(key, key), value)
for key, value in json.loads(result.replace('\t', '\\t')).items())
def check_dgii(rnc, ncf, timeout=30): # pragma: no cover
"""Validate the RNC, NCF combination on using the DGII online web service.
This uses the validation service run by the the Dirección General de
Impuestos Internos, the Dominican Republic tax department to check
whether the combination of RNC and NCF is valid. The timeout is in
seconds.
Returns a dict with the following structure::
{
'name': 'The registered name',
'proof': 'Source of the information',
'is_valid': '1',
'validation_message': '',
'rnc': '123456789',
'ncf': 'A020010210100000005'
}
Will return None if the number is invalid or unknown."""
from stdnum.do.rnc import compact as rnc_compact
from stdnum.do.rnc import dgii_wsdl
rnc = rnc_compact(rnc)
ncf = compact(ncf)
client = get_soap_client(dgii_wsdl, timeout)
result = client.GetNCF(
RNC=rnc,
NCF=ncf,
IMEI='')
if result and 'GetNCFResult' in result:
result = result['GetNCFResult'] # PySimpleSOAP only
if result == '0':
return
return _convert_result(result)
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