feed2toot-docker/feed2toot/feedcache.py

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# vim:ts=4:sw=4:ft=python:fileencoding=utf-8
# Copyright © 2015-2017 Carl Chenet <carl.chenet@ohmytux.com>
# 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
# 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/>
'''Manage a cache with the ids of the feed entries'''
# standard libraires imports
from collections import deque
import os
import os.path
class FeedCache:
'''FeedCache class'''
def __init__(self, options):
'''Constructore of the FeedCache class'''
self.options = options
self.main()
def getdeque(self):
'''return the deque'''
return self.dbfeed
def main(self):
'''Main of the FeedCache class'''
if os.path.exists(self.options['cachefile']):
with open(self.options['cachefile']) as dbdsc:
dbfromfile = dbdsc.readlines()
dblist = [i.strip() for i in dbfromfile]
self.dbfeed = deque(dblist, self.options['cache_limit'] )
else:
self.dbfeed = deque([], self.options['cache_limit'] )
def append(self, rssid):
'''Append a rss id to the cache'''
self.dbfeed.append(rssid)
def close(self):
'''Close the cache'''
with open(self.options['cachefile'], 'w') as dbdsc:
dbdsc.writelines((''.join([i, os.linesep]) for i in self.dbfeed))