Adding upstream version 1.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

feedgen/ext/syndication.py

@@ -0,0 +1,60 @@
+# -*- 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