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# -*- coding: utf-8 -*-
#
# Copyright (C) 2005-2006 Edgewall Software
# Copyright (C) 2005 Matthew Good <trac@matt-good.net>
# Copyright (C) 2006 Christopher Lenz <cmlenz@gmx.de>
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://trac.edgewall.com/license.html.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://projects.edgewall.com/trac/.
#
# Author: Matthew Good <trac@matt-good.net>
import re
from trac.config import IntOption
from trac.core import *
from trac.wiki.api import IWikiChangeListener
from trac.wiki.model import WikiPage
from tracspamfilter.api import IFilterStrategy
class RegexFilterStrategy(Component):
implements(IFilterStrategy, IWikiChangeListener)
karma_points = IntOption('spam-filter', 'regex_karma', '5',
"""By how many points a match with a pattern on the BadContent page
impacts the overall karma of a submission.""")
def __init__(self):
self.patterns = []
page = WikiPage(self.env, 'BadContent')
if page.exists:
self._load_patterns(page)
# IFilterStrategy implementation
def test(self, req, author, content):
points = 0
for pattern in self.patterns:
match = pattern.search(content)
if match:
self.log.debug('Pattern %r found in submission',
pattern.pattern)
points -= abs(self.karma_points)
if points != 0:
return points, 'Content contained blacklisted patterns'
def train(self, req, author, content, spam=True):
pass
# IWikiChangeListener implementation
def wiki_page_changed(self, page, *args):
if page.name == 'BadContent':
self._load_patterns(page)
wiki_page_added = wiki_page_changed
wiki_page_version_deleted = wiki_page_changed
def wiki_page_deleted(self, page):
if page.name == 'BadContent':
self.patterns = []
# Internal methods
def _load_patterns(self, page):
if '{{{' in page.text and '}}}' in page.text:
lines = page.text.split('{{{', 1)[1].split('}}}', 1)[0].splitlines()
self.patterns = [re.compile(p.strip()) for p in lines if p.strip()]
self.log.info('Loaded %s patterns from BadContent',
len(self.patterns))
else:
self.log.warning('BadContent page does not contain any patterns')
self.patterns = []
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