PTN 1.3
This commit is contained in:
marco
@@ -1,510 +0,0 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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language and subtitle_language properties
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"""
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# pylint: disable=no-member
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import copy
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from collections import defaultdict, namedtuple
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import babelfish
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from rebulk import Rebulk, Rule, RemoveMatch, RenameMatch
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from rebulk.remodule import re
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from ..common import seps
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from ..common.pattern import is_disabled
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from ..common.words import iter_words
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from ..common.validators import seps_surround
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def language(config, common_words):
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"""
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Builder for rebulk object.
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:param config: rule configuration
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:type config: dict
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:param common_words: common words
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:type common_words: set
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:return: Created Rebulk object
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:rtype: Rebulk
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"""
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subtitle_both = config['subtitle_affixes']
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subtitle_prefixes = sorted(subtitle_both + config['subtitle_prefixes'], key=length_comparator)
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subtitle_suffixes = sorted(subtitle_both + config['subtitle_suffixes'], key=length_comparator)
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lang_both = config['language_affixes']
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lang_prefixes = sorted(lang_both + config['language_prefixes'], key=length_comparator)
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lang_suffixes = sorted(lang_both + config['language_suffixes'], key=length_comparator)
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weak_affixes = frozenset(config['weak_affixes'])
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rebulk = Rebulk(disabled=lambda context: (is_disabled(context, 'language') and
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is_disabled(context, 'subtitle_language')))
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rebulk.string(*subtitle_prefixes, name="subtitle_language.prefix", ignore_case=True, private=True,
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validator=seps_surround, tags=['release-group-prefix'],
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disabled=lambda context: is_disabled(context, 'subtitle_language'))
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rebulk.string(*subtitle_suffixes, name="subtitle_language.suffix", ignore_case=True, private=True,
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validator=seps_surround,
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disabled=lambda context: is_disabled(context, 'subtitle_language'))
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rebulk.string(*lang_suffixes, name="language.suffix", ignore_case=True, private=True,
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validator=seps_surround, tags=['source-suffix'],
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disabled=lambda context: is_disabled(context, 'language'))
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def find_languages(string, context=None):
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"""Find languages in the string
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:return: list of tuple (property, Language, lang_word, word)
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"""
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return LanguageFinder(context, subtitle_prefixes, subtitle_suffixes,
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lang_prefixes, lang_suffixes, weak_affixes).find(string)
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rebulk.functional(find_languages,
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properties={'language': [None]},
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disabled=lambda context: not context.get('allowed_languages'))
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rebulk.rules(SubtitleExtensionRule,
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SubtitlePrefixLanguageRule,
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SubtitleSuffixLanguageRule,
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RemoveLanguage,
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RemoveInvalidLanguages(common_words))
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babelfish.language_converters['guessit'] = GuessitConverter(config['synonyms'])
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return rebulk
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UNDETERMINED = babelfish.Language('und')
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MULTIPLE = babelfish.Language('mul')
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NON_SPECIFIC_LANGUAGES = frozenset([UNDETERMINED, MULTIPLE])
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class GuessitConverter(babelfish.LanguageReverseConverter): # pylint: disable=missing-docstring
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_with_country_regexp = re.compile(r'(.*)\((.*)\)')
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_with_country_regexp2 = re.compile(r'(.*)-(.*)')
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def __init__(self, synonyms):
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self.guessit_exceptions = {}
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for code, synlist in synonyms.items():
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if '_' in code:
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(alpha3, country) = code.split('_')
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else:
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(alpha3, country) = (code, None)
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for syn in synlist:
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self.guessit_exceptions[syn.lower()] = (alpha3, country, None)
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@property
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def codes(self): # pylint: disable=missing-docstring
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return (babelfish.language_converters['alpha3b'].codes |
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babelfish.language_converters['alpha2'].codes |
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babelfish.language_converters['name'].codes |
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babelfish.language_converters['opensubtitles'].codes |
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babelfish.country_converters['name'].codes |
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frozenset(self.guessit_exceptions.keys()))
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def convert(self, alpha3, country=None, script=None):
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return str(babelfish.Language(alpha3, country, script))
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def reverse(self, name): # pylint:disable=arguments-differ
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name = name.lower()
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# exceptions come first, as they need to override a potential match
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# with any of the other guessers
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try:
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return self.guessit_exceptions[name]
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except KeyError:
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pass
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for conv in [babelfish.Language,
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babelfish.Language.fromalpha3b,
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babelfish.Language.fromalpha2,
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babelfish.Language.fromname,
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babelfish.Language.fromopensubtitles,
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babelfish.Language.fromietf]:
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try:
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reverse = conv(name)
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return reverse.alpha3, reverse.country, reverse.script
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except (ValueError, babelfish.LanguageReverseError):
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pass
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raise babelfish.LanguageReverseError(name)
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def length_comparator(value):
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"""
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Return value length.
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"""
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return len(value)
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_LanguageMatch = namedtuple('_LanguageMatch', ['property_name', 'word', 'lang'])
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class LanguageWord(object):
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"""
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Extension to the Word namedtuple in order to create compound words.
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E.g.: pt-BR, soft subtitles, custom subs
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"""
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def __init__(self, start, end, value, input_string, next_word=None):
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self.start = start
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self.end = end
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self.value = value
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self.input_string = input_string
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self.next_word = next_word
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@property
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def extended_word(self): # pylint:disable=inconsistent-return-statements
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"""
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Return the extended word for this instance, if any.
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"""
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if self.next_word:
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separator = self.input_string[self.end:self.next_word.start]
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next_separator = self.input_string[self.next_word.end:self.next_word.end + 1]
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if (separator == '-' and separator != next_separator) or separator in (' ', '.'):
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value = self.input_string[self.start:self.next_word.end].replace('.', ' ')
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return LanguageWord(self.start, self.next_word.end, value, self.input_string, self.next_word.next_word)
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def __repr__(self):
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return '<({start},{end}): {value}'.format(start=self.start, end=self.end, value=self.value)
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def to_rebulk_match(language_match):
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"""
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Convert language match to rebulk Match: start, end, dict
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"""
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word = language_match.word
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start = word.start
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end = word.end
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name = language_match.property_name
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if language_match.lang == UNDETERMINED:
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return start, end, {
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'name': name,
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'value': word.value.lower(),
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'formatter': babelfish.Language,
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'tags': ['weak-language']
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}
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return start, end, {
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'name': name,
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'value': language_match.lang
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}
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class LanguageFinder(object):
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"""
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Helper class to search and return language matches: 'language' and 'subtitle_language' properties
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"""
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def __init__(self, context,
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subtitle_prefixes, subtitle_suffixes,
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lang_prefixes, lang_suffixes, weak_affixes):
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allowed_languages = context.get('allowed_languages') if context else None
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self.allowed_languages = {l.lower() for l in allowed_languages or []}
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self.weak_affixes = weak_affixes
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self.prefixes_map = {}
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self.suffixes_map = {}
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if not is_disabled(context, 'subtitle_language'):
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self.prefixes_map['subtitle_language'] = subtitle_prefixes
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self.suffixes_map['subtitle_language'] = subtitle_suffixes
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self.prefixes_map['language'] = lang_prefixes
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self.suffixes_map['language'] = lang_suffixes
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def find(self, string):
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"""
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Return all matches for language and subtitle_language.
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Undetermined language matches are removed if a regular language is found.
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Multi language matches are removed if there are only undetermined language matches
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"""
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regular_lang_map = defaultdict(set)
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undetermined_map = defaultdict(set)
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multi_map = defaultdict(set)
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for match in self.iter_language_matches(string):
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key = match.property_name
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if match.lang == UNDETERMINED:
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undetermined_map[key].add(match)
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elif match.lang == 'mul':
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multi_map[key].add(match)
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else:
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regular_lang_map[key].add(match)
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for key, values in multi_map.items():
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if key in regular_lang_map or key not in undetermined_map:
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for value in values:
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yield to_rebulk_match(value)
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for key, values in undetermined_map.items():
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if key not in regular_lang_map:
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for value in values:
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yield to_rebulk_match(value)
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for values in regular_lang_map.values():
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for value in values:
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yield to_rebulk_match(value)
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def iter_language_matches(self, string):
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"""
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Return language matches for the given string.
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"""
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candidates = []
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previous = None
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for word in iter_words(string):
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language_word = LanguageWord(start=word.span[0], end=word.span[1], value=word.value, input_string=string)
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if previous:
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previous.next_word = language_word
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candidates.append(previous)
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previous = language_word
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if previous:
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candidates.append(previous)
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for candidate in candidates:
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for match in self.iter_matches_for_candidate(candidate):
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yield match
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def iter_matches_for_candidate(self, language_word):
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"""
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Return language matches for the given candidate word.
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"""
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tuples = [
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(language_word, language_word.next_word,
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self.prefixes_map,
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lambda string, prefix: string.startswith(prefix),
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lambda string, prefix: string[len(prefix):]),
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(language_word.next_word, language_word,
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self.suffixes_map,
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lambda string, suffix: string.endswith(suffix),
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lambda string, suffix: string[:len(string) - len(suffix)])
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]
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for word, fallback_word, affixes, is_affix, strip_affix in tuples:
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if not word:
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continue
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match = self.find_match_for_word(word, fallback_word, affixes, is_affix, strip_affix)
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if match:
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yield match
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match = self.find_language_match_for_word(language_word)
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if match:
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yield match
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def find_match_for_word(self, word, fallback_word, affixes, is_affix, strip_affix): # pylint:disable=inconsistent-return-statements
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"""
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Return the language match for the given word and affixes.
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"""
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for current_word in (word.extended_word, word):
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if not current_word:
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continue
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word_lang = current_word.value.lower()
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for key, parts in affixes.items():
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for part in parts:
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if not is_affix(word_lang, part):
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continue
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match = None
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value = strip_affix(word_lang, part)
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if not value:
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if fallback_word and (
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abs(fallback_word.start - word.end) <= 1 or abs(word.start - fallback_word.end) <= 1):
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match = self.find_language_match_for_word(fallback_word, key=key)
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if not match and part not in self.weak_affixes:
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match = self.create_language_match(key, LanguageWord(current_word.start, current_word.end,
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'und', current_word.input_string))
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else:
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match = self.create_language_match(key, LanguageWord(current_word.start, current_word.end,
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value, current_word.input_string))
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if match:
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return match
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def find_language_match_for_word(self, word, key='language'): # pylint:disable=inconsistent-return-statements
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"""
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Return the language match for the given word.
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"""
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for current_word in (word.extended_word, word):
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if current_word:
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match = self.create_language_match(key, current_word)
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if match:
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return match
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def create_language_match(self, key, word): # pylint:disable=inconsistent-return-statements
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"""
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Create a LanguageMatch for a given word
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"""
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lang = self.parse_language(word.value.lower())
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if lang is not None:
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return _LanguageMatch(property_name=key, word=word, lang=lang)
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def parse_language(self, lang_word): # pylint:disable=inconsistent-return-statements
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"""
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Parse the lang_word into a valid Language.
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Multi and Undetermined languages are also valid languages.
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"""
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try:
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lang = babelfish.Language.fromguessit(lang_word)
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if ((hasattr(lang, 'name') and lang.name.lower() in self.allowed_languages) or
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(hasattr(lang, 'alpha2') and lang.alpha2.lower() in self.allowed_languages) or
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lang.alpha3.lower() in self.allowed_languages):
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return lang
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except babelfish.Error:
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pass
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class SubtitlePrefixLanguageRule(Rule):
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"""
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Convert language guess as subtitle_language if previous match is a subtitle language prefix
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"""
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consequence = RemoveMatch
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properties = {'subtitle_language': [None]}
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def enabled(self, context):
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return not is_disabled(context, 'subtitle_language')
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def when(self, matches, context):
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to_rename = []
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to_remove = matches.named('subtitle_language.prefix')
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for lang in matches.named('language'):
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prefix = matches.previous(lang, lambda match: match.name == 'subtitle_language.prefix', 0)
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if not prefix:
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group_marker = matches.markers.at_match(lang, lambda marker: marker.name == 'group', 0)
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if group_marker:
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# Find prefix if placed just before the group
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prefix = matches.previous(group_marker, lambda match: match.name == 'subtitle_language.prefix',
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0)
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if not prefix:
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# Find prefix if placed before in the group
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prefix = matches.range(group_marker.start, lang.start,
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lambda match: match.name == 'subtitle_language.prefix', 0)
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if prefix:
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to_rename.append((prefix, lang))
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to_remove.extend(matches.conflicting(lang))
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if prefix in to_remove:
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to_remove.remove(prefix)
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if to_rename or to_remove:
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return to_rename, to_remove
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return False
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def then(self, matches, when_response, context):
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to_rename, to_remove = when_response
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super(SubtitlePrefixLanguageRule, self).then(matches, to_remove, context)
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for prefix, match in to_rename:
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# Remove suffix equivalent of prefix.
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suffix = copy.copy(prefix)
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suffix.name = 'subtitle_language.suffix'
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if suffix in matches:
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matches.remove(suffix)
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matches.remove(match)
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match.name = 'subtitle_language'
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matches.append(match)
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class SubtitleSuffixLanguageRule(Rule):
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"""
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Convert language guess as subtitle_language if next match is a subtitle language suffix
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"""
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dependency = SubtitlePrefixLanguageRule
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consequence = RemoveMatch
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||||
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||||
properties = {'subtitle_language': [None]}
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||||
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||||
def enabled(self, context):
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||||
return not is_disabled(context, 'subtitle_language')
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||||
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||||
def when(self, matches, context):
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to_append = []
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to_remove = matches.named('subtitle_language.suffix')
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for lang in matches.named('language'):
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suffix = matches.next(lang, lambda match: match.name == 'subtitle_language.suffix', 0)
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if suffix:
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||||
to_append.append(lang)
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if suffix in to_remove:
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to_remove.remove(suffix)
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||||
if to_append or to_remove:
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||||
return to_append, to_remove
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||||
return False
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||||
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||||
def then(self, matches, when_response, context):
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||||
to_rename, to_remove = when_response
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||||
super(SubtitleSuffixLanguageRule, self).then(matches, to_remove, context)
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for match in to_rename:
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matches.remove(match)
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match.name = 'subtitle_language'
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matches.append(match)
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||||
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||||
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||||
class SubtitleExtensionRule(Rule):
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||||
"""
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||||
Convert language guess as subtitle_language if next match is a subtitle extension.
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||||
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||||
Since it's a strong match, it also removes any conflicting source with it.
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||||
"""
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||||
consequence = [RemoveMatch, RenameMatch('subtitle_language')]
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||||
|
||||
properties = {'subtitle_language': [None]}
|
||||
|
||||
def enabled(self, context):
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||||
return not is_disabled(context, 'subtitle_language')
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||||
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||||
def when(self, matches, context): # pylint:disable=inconsistent-return-statements
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||||
subtitle_extension = matches.named('container',
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||||
lambda match: 'extension' in match.tags and 'subtitle' in match.tags,
|
||||
0)
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||||
if subtitle_extension:
|
||||
subtitle_lang = matches.previous(subtitle_extension, lambda match: match.name == 'language', 0)
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||||
if subtitle_lang:
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||||
for weak in matches.named('subtitle_language', predicate=lambda m: 'weak-language' in m.tags):
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||||
weak.private = True
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||||
|
||||
return matches.conflicting(subtitle_lang, lambda m: m.name == 'source'), subtitle_lang
|
||||
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||||
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||||
class RemoveLanguage(Rule):
|
||||
"""Remove language matches that were not converted to subtitle_language when language is disabled."""
|
||||
|
||||
consequence = RemoveMatch
|
||||
|
||||
def enabled(self, context):
|
||||
return is_disabled(context, 'language')
|
||||
|
||||
def when(self, matches, context):
|
||||
return matches.named('language')
|
||||
|
||||
|
||||
class RemoveInvalidLanguages(Rule):
|
||||
"""Remove language matches that matches the blacklisted common words."""
|
||||
|
||||
consequence = RemoveMatch
|
||||
priority = 32
|
||||
|
||||
def __init__(self, common_words):
|
||||
"""Constructor."""
|
||||
super(RemoveInvalidLanguages, self).__init__()
|
||||
self.common_words = common_words
|
||||
|
||||
def when(self, matches, context):
|
||||
to_remove = []
|
||||
for match in matches.range(0, len(matches.input_string),
|
||||
predicate=lambda m: m.name in ('language', 'subtitle_language')):
|
||||
if match.raw.lower() not in self.common_words:
|
||||
continue
|
||||
|
||||
group = matches.markers.at_match(match, index=0, predicate=lambda m: m.name == 'group')
|
||||
if group and (
|
||||
not matches.range(
|
||||
group.start, group.end, predicate=lambda m: m.name not in ('language', 'subtitle_language')
|
||||
) and (not matches.holes(group.start, group.end, predicate=lambda m: m.value.strip(seps)))):
|
||||
continue
|
||||
|
||||
to_remove.append(match)
|
||||
|
||||
return to_remove
|
||||
Reference in New Issue
Block a user