blob: 743c74e1097390846a1f764d520d026d5f4bc1cb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#
# Copyright (c) 2014 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import dbm
import atexit
from pixelated.adapter.tag import Tag
class TagIndex:
"""
Manages an index for mail's tags using a file storage.
"""
def __init__(self, db_path):
self.db_path = db_path
self.db = dbm.open(db_path, 'c')
atexit.register(self.close_db)
def set(self, tag):
self.db[tag.name] = tag.as_json_string()
self.close_db() # force flush
self.db = dbm.open(self.db_path, 'c')
def add(self, tag):
if tag.name not in self.db:
self.set(tag)
def get(self, tag_name):
if tag_name in self.db:
return Tag.from_json_string(self.db.get(tag_name))
else:
return None
def remove(self, tag_name):
if tag_name in self.db:
del self.db[tag_name]
def empty(self):
return len(self.db.keys()) == 0
def values(self):
return set(self.get(key) for key in self.db.keys())
def close_db(self):
self.db.close()
|
