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