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# -*- coding: utf-8 -*-
#
# Copyright 2015 Kenichi Sato <ksato9700@gmail.com>
#
'''
Extends FeedGenerator to support Syndication module
See below for details
http://web.resource.org/rss/1.0/modules/syndication/
'''
from feedgen.ext.base import BaseExtension
from feedgen.util import xml_elem
SYNDICATION_NS = 'http://purl.org/rss/1.0/modules/syndication/'
PERIOD_TYPE = ('hourly', 'daily', 'weekly', 'monthly', 'yearly')
def _set_value(channel, name, value):
if value:
newelem = xml_elem('{%s}' % SYNDICATION_NS + name, channel)
newelem.text = value
class SyndicationExtension(BaseExtension):
def __init__(self):
self._update_period = None
self._update_freq = None
self._update_base = None
def extend_ns(self):
return {'sy': SYNDICATION_NS}
def extend_rss(self, rss_feed):
channel = rss_feed[0]
_set_value(channel, 'UpdatePeriod', self._update_period)
_set_value(channel, 'UpdateFrequency', str(self._update_freq))
_set_value(channel, 'UpdateBase', self._update_base)
def update_period(self, value):
if value not in PERIOD_TYPE:
raise ValueError('Invalid update period value')
self._update_period = value
return self._update_period
def update_frequency(self, value):
if type(value) is not int or value <= 0:
raise ValueError('Invalid update frequency value')
self._update_freq = value
return self._update_freq
def update_base(self, value):
# the value should be in W3CDTF format
self._update_base = value
return self._update_base
class SyndicationEntryExtension(BaseExtension):
pass
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