python-stdnum commit: r147 - in python-stdnum: . stdnum stdnum/bg tests

[Commits of the python-stdnum project <python-stdnum-commits [at] lists.arthurdejong.org>]

Author: arthur
Date: Sat Feb 18 21:05:29 2012
New Revision: 147
URL: http://arthurdejong.org/viewvc/python-stdnum?revision=147&view=revision

Log:
add an EGN (ЕГН, Единен граждански номер, Bulgarian personal identity codes) 
module

Added:
   python-stdnum/stdnum/bg/
   python-stdnum/stdnum/bg/__init__.py
   python-stdnum/stdnum/bg/egn.py
Modified:
   python-stdnum/README
   python-stdnum/stdnum/__init__.py
   python-stdnum/tests/test_robustness.doctest

Modified: python-stdnum/README
==============================================================================
--- python-stdnum/README        Sat Feb 18 20:26:20 2012        (r146)
+++ python-stdnum/README        Sat Feb 18 21:05:29 2012        (r147)
@@ -30,6 +30,7 @@
  * NIE (Número de Identificación de Extranjeros, Spanish identification number
    for foreigners)
  * CNP (Cod Numeric Personal, Romanian Numerical Personal Code)
+ * EGN (ЕГН, Единен граждански номер, Bulgarian personal identity codes)
  * NIF (Número de Identificación Fiscal, Spanish VAT number)
  * FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
  * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)

Modified: python-stdnum/stdnum/__init__.py
==============================================================================
--- python-stdnum/stdnum/__init__.py    Sat Feb 18 20:26:20 2012        (r146)
+++ python-stdnum/stdnum/__init__.py    Sat Feb 18 21:05:29 2012        (r147)
@@ -44,6 +44,7 @@
  * NIE (Número de Identificación de Extranjeros, Spanish identification number
    for foreigners)
  * CNP (Cod Numeric Personal, Romanian Numerical Personal Code)
+ * EGN (ЕГН, Единен граждански номер, Bulgarian personal identity codes)
  * NIF (Número de Identificación Fiscal, Spanish VAT number)
  * FPA, ΦΠΑ (Foros Prostithemenis Aksias, the Greek VAT number)
  * Ust ID Nr. (Umsatzsteur Identifikationnummer, the German VAT number)

Added: python-stdnum/stdnum/bg/__init__.py
==============================================================================

Added: python-stdnum/stdnum/bg/egn.py
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ python-stdnum/stdnum/bg/egn.py      Sat Feb 18 21:05:29 2012        (r147)
@@ -0,0 +1,89 @@
+# egn.py - functions for handling Bulgarian national identification numbers
+# coding: utf-8
+#
+# Copyright (C) 2012 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
+
+"""Module for handling Bulgarian EGN (ЕГН, Единен граждански номер) numbers.
+
+It is a 10-digit number of which the first 6 digits denote the person's
+birth date, the next three digits represent a birth order number from
+which the person's gender can be determined and the last digit is a check
+digit.
+
+>>> compact('752316 926 3')
+'7523169263'
+>>> is_valid('8032056031')
+True
+>>> get_birth_date('7542011030')
+datetime.date(2075, 2, 1)
+>>> is_valid('7552010004')  # invalid check digit
+False
+>>> is_valid('8019010008')  # invalid date
+False
+"""
+
+import datetime
+
+from stdnum.util import clean
+
+
+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, ' -.').upper().strip()
+
+
+def calc_check_digit(number):
+    """Calculate the check digit. The number passed should not have the
+    check digit included."""
+    weights = (2, 4, 8, 5, 10, 9, 7, 3, 6)
+    return str(sum(weights[i] * int(n) for i, n in enumerate(number)) % 11 % 
10)
+
+
+def get_birth_date(number):
+    """Split the date parts from the number and return the birth date."""
+    year = int(number[0:2]) + 1900
+    month = int(number[2:4])
+    day = int(number[4:6])
+    if month > 40:
+        year += 100
+        month -= 40
+    elif month > 20:
+        year -= 100
+        month -= 20
+    return datetime.date(year, month, day)
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid national
+    identification number. This checks the length, formatting, embedded
+    date and check digit."""
+    try:
+        number = compact(number)
+    except:
+        return False
+    if not number.isdigit() or len(number) != 10:
+        return False
+    # check if birth date is valid
+    try:
+        birth_date = get_birth_date(number)
+        # TODO: check that the birth date is not in the future
+    except ValueError, e:
+        return False
+    # check the check digit
+    return calc_check_digit(number[:-1]) == number[-1]

Modified: python-stdnum/tests/test_robustness.doctest
==============================================================================
--- python-stdnum/tests/test_robustness.doctest Sat Feb 18 20:26:20 2012        
(r146)
+++ python-stdnum/tests/test_robustness.doctest Sat Feb 18 21:05:29 2012        
(r147)
@@ -28,6 +28,7 @@
 >>> from stdnum import luhn, meid, verhoeff
 >>> from stdnum.at import uid
 >>> from stdnum.be import vat as be_vat
+>>> from stdnum.bg import egn
 >>> from stdnum.br import cpf
 >>> from stdnum.cy import vat as cy_vat
 >>> from stdnum.cz import dic, rc
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