1
yomichan-anki/yomi_base/japanese/deinflect.py

100 lines
2.9 KiB
Python

# -*- coding: utf-8 -*-
# Copyright (C) 2013 Alex Yatskov
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import codecs
import json
class Deinflection:
def __init__(self, term, tags=[], rule=''):
self.children = []
self.term = term
self.tags = tags
self.rule = rule
def validate(self, validator):
for tags in validator(self.term):
if len(self.tags) == 0:
return True
for tag in self.tags:
if tag in tags:
return True
def deinflect(self, validator, rules):
if self.validate(validator):
child = Deinflection(self.term, self.tags)
self.children.append(child)
for rule, variants in rules.items():
for v in variants:
tagsIn = v['tagsIn']
tagsOut = v['tagsOut']
kanaIn = v['kanaIn']
kanaOut = v['kanaOut']
allowed = len(self.tags) == 0
for tag in self.tags:
#
# TODO: Handle addons through tags.json or rules.json
#
if tag in tagsIn:
allowed = True
break
if not allowed or not self.term.endswith(kanaIn):
continue
term = self.term[:-len(kanaIn)] + kanaOut
child = Deinflection(term, tagsOut, rule)
if child.deinflect(validator, rules):
self.children.append(child)
return len(self.children) > 0
def gather(self):
if len(self.children) == 0:
return [{'root': self.term, 'tags': self.tags, 'rules': []}]
paths = []
for child in self.children:
for path in child.gather():
if self.rule:
path['rules'].append(self.rule)
path['source'] = self.term
paths.append(path)
return paths
class Deinflector:
def __init__(self, filename):
with codecs.open(filename, 'rb', 'utf-8') as fp:
self.rules = json.load(fp)
def deinflect(self, term, validator):
node = Deinflection(term)
if node.deinflect(validator, self.rules):
return node.gather()