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# This file is part of beets.
# Copyright 2013, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
""" Clears tag fields in media files."""
import re
import logging
from beets.plugins import BeetsPlugin
from beets.library import Item
from beets.importer import action
from beets.util import confit
__author__ = 'baobab@heresiarch.info'
__version__ = '0.10'
log = logging.getLogger('beets')
class ZeroPlugin(BeetsPlugin):
_instance = None
def __init__(self):
super(ZeroPlugin, self).__init__()
# Listeners.
self.register_listener('write', self.write_event)
self.register_listener('import_task_choice',
self.import_task_choice_event)
self.config.add({
'fields': [],
})
self.patterns = {}
self.warned = False
for field in self.config['fields'].as_str_seq():
if field in ('id', 'path', 'album_id'):
log.warn(u'[zero] field \'{0}\' ignored, zeroing '
u'it would be dangerous'.format(field))
continue
if field not in Item._fields.keys():
log.error(u'[zero] invalid field: {0}'.format(field))
continue
try:
self.patterns[field] = self.config[field].as_str_seq()
except confit.NotFoundError:
# Matches everything
self.patterns[field] = [u'']
def import_task_choice_event(self, session, task):
"""Listen for import_task_choice event."""
if task.choice_flag == action.ASIS and not self.warned:
log.warn(u'[zero] cannot zero in \"as-is\" mode')
self.warned = True
# TODO request write in as-is mode
@classmethod
def match_patterns(cls, field, patterns):
"""Check if field (as string) is matching any of the patterns in
the list.
"""
for p in patterns:
if re.search(p, unicode(field), flags=re.IGNORECASE):
return True
return False
def write_event(self, item, path, tags):
"""Listen for write event."""
if not self.patterns:
log.warn(u'[zero] no fields, nothing to do')
return
for field, patterns in self.patterns.items():
if field not in tags:
log.error(u'[zero] no such field: {0}'.format(field))
continue
value = tags[field]
if self.match_patterns(value, patterns):
log.debug(u'[zero] {0}: {1} -> None'.format(field, value))
tags[field] = None
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