From c69c8f0fc52d003faeba378a6834fe555eff3b72 Mon Sep 17 00:00:00 2001
From: Arthur de Jong <arthur@arthurdejong.org>
Date: Sat, 18 Apr 2015 18:02:41 +0200
Subject: Add Chilean national tax number (RUT)

Based on the implementation in the vatnumber module.
---
 stdnum/cl/rut.py | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 stdnum/cl/rut.py

(limited to 'stdnum/cl/rut.py')

diff --git a/stdnum/cl/rut.py b/stdnum/cl/rut.py
new file mode 100644
index 0000000..ba27fa8
--- /dev/null
+++ b/stdnum/cl/rut.py
@@ -0,0 +1,91 @@
+# rut.py - functions for handling Chile RUT/RUN numbers
+# coding: utf-8
+#
+# Copyright (C) 2008-2011 Cédric Krier
+# Copyright (C) 2008-2011 B2CK
+# Copyright (C) 2015 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
+
+"""RUT (Rol Único Tributario, Chilean national tax number).
+
+The RUT, the Chilean national tax number is the same as the RUN (Rol Único
+Nacional) the Chilean national identification number. The number consists of
+8 digits, followed by a check digit.
+
+>>> validate('76086428-5')
+'760864285'
+>>> validate('CL 12531909-2')
+'125319092'
+>>> validate('12531909-3')
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> validate('76086A28-5')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> format('125319092')
+'12.531.909-2'
+"""
+
+from stdnum.exceptions import *
+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."""
+    number = clean(number, ' -.').upper().strip()
+    if number.startswith('CL'):
+        number = number[2:]
+    return number
+
+
+def calc_check_digit(number):
+    """Calculate the check digit. The number passed should not have the
+    check digit included."""
+    s = sum(int(n) * (4 + (5 - i) % 6) for i, n in enumerate(number[::-1]))
+    return '0123456789K'[s % 11]
+
+
+def validate(number):
+    """Checks to see if the number provided is a valid number. This
+    checks the length, formatting and check digit."""
+    number = compact(number)
+    if len(number) not in (8, 9):
+        raise InvalidLength()
+    if not number[:-1].isdigit():
+        raise InvalidFormat()
+    if number[-1] != calc_check_digit(number[:-1]):
+        raise InvalidChecksum()
+    return number
+
+
+def is_valid(number):
+    """Checks to see if the number provided is a valid number. This
+    checks the length, formatting and check digit."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False
+
+
+def format(number):
+    """Reformat the passed number to the standard format."""
+    number = compact(number)
+    return (number[:-7] + '.' + number[-7:-4] + '.' +
+            number[-4:-1] + '-' + number[-1])
-- 
cgit v1.2.3