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86 lines
2.2 KiB
86 lines
2.2 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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crc and uuid properties
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"""
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from rebulk.remodule import re
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from rebulk import Rebulk
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from ..common.validators import seps_surround
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def crc():
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"""
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Builder for rebulk object.
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:return: Created Rebulk object
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:rtype: Rebulk
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"""
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rebulk = Rebulk().regex_defaults(flags=re.IGNORECASE)
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rebulk.defaults(validator=seps_surround)
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rebulk.regex('(?:[a-fA-F]|[0-9]){8}', name='crc32',
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conflict_solver=lambda match, other: match
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if other.name in ['episode', 'season']
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else '__default__')
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rebulk.functional(guess_idnumber, name='uuid',
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conflict_solver=lambda match, other: match
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if other.name in ['episode', 'season']
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else '__default__')
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return rebulk
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_DIGIT = 0
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_LETTER = 1
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_OTHER = 2
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_idnum = re.compile(r'(?P<uuid>[a-zA-Z0-9-]{20,})') # 1.0, (0, 0))
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def guess_idnumber(string):
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"""
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Guess id number function
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:param string:
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:type string:
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:return:
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:rtype:
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"""
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# pylint:disable=invalid-name
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ret = []
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matches = list(_idnum.finditer(string))
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for match in matches:
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result = match.groupdict()
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switch_count = 0
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switch_letter_count = 0
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letter_count = 0
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last_letter = None
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last = _LETTER
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for c in result['uuid']:
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if c in '0123456789':
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ci = _DIGIT
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elif c in 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ':
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ci = _LETTER
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if c != last_letter:
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switch_letter_count += 1
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last_letter = c
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letter_count += 1
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else:
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ci = _OTHER
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if ci != last:
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switch_count += 1
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last = ci
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# only return the result as probable if we alternate often between
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# char type (more likely for hash values than for common words)
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switch_ratio = float(switch_count) / len(result['uuid'])
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letters_ratio = (float(switch_letter_count) / letter_count) if letter_count > 0 else 1
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if switch_ratio > 0.4 and letters_ratio > 0.4:
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ret.append(match.span())
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return ret
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