97 lines
2.9 KiB
Python
97 lines
2.9 KiB
Python
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# imsi.py - functions for handling International Mobile Subscriber Identity
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# (IMSI) numbers
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#
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# Copyright (C) 2011, 2012, 2013 Arthur de Jong
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301 USA
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"""IMSI (International Mobile Subscriber Identity).
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The IMSI (International Mobile Subscriber Identity) is used to identify
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mobile phone users (the SIM).
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>>> validate('429011234567890')
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'429011234567890'
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>>> validate('439011234567890') # unknown MCC
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Traceback (most recent call last):
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...
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InvalidFormat: ...
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>>> split('429011234567890')
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('429', '01', '1234567890')
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>>> split('310150123456789')
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('310', '150', '123456789')
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>>> info('460001234567890')['mcc']
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'460'
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>>> str(info('460001234567890')['country'])
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'China'
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"""
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from stdnum.exceptions import *
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from stdnum.util import clean
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def compact(number):
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"""Convert the IMSI number to the minimal representation. This strips the
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number of any valid separators and removes surrounding whitespace."""
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return clean(number, ' -').strip().upper()
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def split(number):
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"""Split the specified IMSI into a Mobile Country Code (MCC), a Mobile
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Network Code (MNC), a Mobile Station Identification Number (MSIN)."""
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from stdnum import numdb
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# clean up number
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number = compact(number)
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# split the number
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return tuple(numdb.get('imsi').split(number))
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def validate(number):
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"""Checks to see if the number provided is a valid IMSI."""
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number = compact(number)
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if not number.isdigit():
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raise InvalidFormat()
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if len(number) not in (14, 15):
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raise InvalidLength()
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if len(split(number)) != 3:
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raise InvalidFormat()
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return number
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def info(number):
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"""Return a dictionary of data about the supplied number."""
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from stdnum import numdb
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# clean up number
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number = compact(number)
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# split the number
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info = dict(number=number)
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mcc_info, mnc_info, msin_info = numdb.get('imsi').info(number)
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info['mcc'] = mcc_info[0]
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info.update(mcc_info[1])
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info['mnc'] = mnc_info[0]
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info.update(mnc_info[1])
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info['msin'] = msin_info[0]
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info.update(msin_info[1])
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return info
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def is_valid(number):
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"""Checks to see if the number provided is a valid IMSI."""
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try:
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return bool(validate(number))
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except ValidationError:
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return False
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