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SickRage/lib/guessit/transfo/guess_idnumber.py

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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
#
# GuessIt - A library for guessing information from filenames
# Copyright (c) 2013 Nicolas Wack <wackou@gmail.com>
#
# GuessIt is free software; you can redistribute it and/or modify it under
# the terms of the Lesser GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# GuessIt 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
# Lesser GNU General Public License for more details.
#
# You should have received a copy of the Lesser GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import unicode_literals
from guessit.transfo import SingleNodeGuesser
from guessit.patterns import find_properties
import re
import logging
log = logging.getLogger(__name__)
def guess_properties(string):
try:
prop, value, pos, end = find_properties(string)[0]
return { prop: value }, (pos, end)
except IndexError:
return None, None
_idnum = re.compile(r'(?P<idNumber>[a-zA-Z0-9-]{10,})') # 1.0, (0, 0))
def guess_idnumber(string):
match = _idnum.search(string)
if match is not None:
result = match.groupdict()
switch_count = 0
DIGIT = 0
LETTER = 1
OTHER = 2
last = LETTER
for c in result['idNumber']:
if c in '0123456789':
ci = DIGIT
elif c in 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ':
ci = LETTER
else:
ci = OTHER
if ci != last:
switch_count += 1
last = ci
switch_ratio = float(switch_count) / len(result['idNumber'])
# only return the result as probable if we alternate often between
# char type (more likely for hash values than for common words)
if switch_ratio > 0.4:
return result, match.span()
return None, None
def process(mtree):
SingleNodeGuesser(guess_idnumber, 0.4, log).process(mtree)