From ada7e48ed47c0a85ef86b3c4da6c918fdfed768d Mon Sep 17 00:00:00 2001
From: Robert Sparks <rjsparks@nostrum.com>
Date: Fri, 23 Oct 2015 19:15:55 +0000
Subject: [PATCH] Framework in place, most of the details worked out  -
 Legacy-Id: 10275

---
 ietf/doc/feeds.py | 79 +++++++++++++++++++++++++++++++++++++++++++++--
 ietf/feed_urls.py |  3 +-
 2 files changed, 79 insertions(+), 3 deletions(-)

diff --git a/ietf/doc/feeds.py b/ietf/doc/feeds.py
index 80fcbc861..bb969a03c 100644
--- a/ietf/doc/feeds.py
+++ b/ietf/doc/feeds.py
@@ -1,12 +1,12 @@
 # Copyright The IETF Trust 2007, All Rights Reserved
 
 from django.contrib.syndication.views import Feed, FeedDoesNotExist
-from django.utils.feedgenerator import Atom1Feed
+from django.utils.feedgenerator import Atom1Feed, Rss201rev2Feed
 from django.core.urlresolvers import reverse as urlreverse
 from django.template.defaultfilters import truncatewords, truncatewords_html, date as datefilter, linebreaks
 from django.utils.html import strip_tags
 
-from ietf.doc.models import Document, State, LastCallDocEvent
+from ietf.doc.models import Document, State, LastCallDocEvent, DocEvent
 from ietf.doc.utils import augment_events_with_revision
 from ietf.doc.templatetags.ietf_filters import format_textarea
 
@@ -75,3 +75,78 @@ class InLastCallFeed(Feed):
     def item_pubdate(self, item):
         return item.lc_event.time
 
+class Rss201WithNamespacesFeed(Rss201rev2Feed):
+    def root_attributes(self):
+        attrs = super(Rss201WithNamespacesFeed, self).root_attributes()
+        attrs['xmlns:dcterms'] = 'http://purl.org/dc/terms/'
+        attrs['xmlns:media'] = 'http://search.yahoo.com/mrss/'
+        attrs['xmlns:xsi'] = 'http://www.w3.org/2001/XMLSchema-instance'
+        return attrs
+
+    def add_item_elements(self, handler, item):
+        super(Rss201WithNamespacesFeed, self).add_item_elements(handler, item)
+
+        for element_name in ['abstract','accessRights', 'format', ]:
+            dc_item_name = 'dcterms_%s' % element_name
+            dc_element_name = 'dcterms:%s' % element_name
+            if dc_item_name in item and item[dc_item_name] is not None:
+                handler.addQuickElement(dc_element_name,item[dc_item_name])
+
+        if 'doi' in item and item['doi'] is not None:
+           handler.addQuickElement('dcterms:identifier',item['doi'],{'xsi:type':'dcterms:doi'})
+
+        if 'media_content' in item and item['media_content'] is not None:
+            handler.startElement('media:content',{'url':item['media_content']['url'],'type':'text/plain'})
+            handler.addQuickElement('dcterms:isFormatOf',item['media_content']['link_url'])
+            handler.endElement('media:content')
+
+class RfcFeed(Feed):
+    feed_type = Rss201WithNamespacesFeed
+    title = "RFCs"
+    author_name = "RFC Editor"
+    link = "https://www.rfc-editor.org/rfc-index2.html"
+    
+    def items(self):
+        rfc_events = DocEvent.objects.filter(type='published_rfc').order_by('-time')
+        results = [(e.doc, e.time) for e in rfc_events[:5]]
+        for doc,time in results:
+            doc.publication_time = time
+        return [doc for doc,time in results]
+    
+    def item_title(self, item):
+        return item.canonical_name()
+
+    def item_description(self, item):
+        return item.title
+
+    def item_link(self, item):
+        return "https://rfc-editor.org/info/%s"%item.canonical_name()
+
+    def item_pubdate(self, item):
+        return item.publication_time
+
+    def item_extra_kwargs(self, item):
+        extra = super(RfcFeed, self).item_extra_kwargs(item)
+        extra.update({'dcterms_abstract': item.abstract})
+        extra.update({'dcterms_accessRights': 'gratis'})
+        extra.update({'dcterms_format': 'text/html'})
+        extra.update({'media_content': {'url': 'https://rfc-editor.org/rfc/%s.txt' % item.canonical_name(),
+                                        'link_url': self.item_link(item) 
+                                       }
+                     })
+        extra.update({'doi':'http://dx.doi.org/10.17487/%s' % item.canonical_name().upper()})
+
+        #TODO 
+        # R104 Publisher (Mandatory - but we need a string from them first)
+
+        #TODO MAYBE (Optional stuff)
+        # R108 License
+        # R115 Creator/Contributor (which would we use?)
+        # F305 Checksum (do they use it?) (or should we put the our digital signature in here somewhere?)
+        # F308 Holder of rights (copyright)
+
+        # Stuff we can't do yet given what's in the datatracker
+        # R118 Keyword
+
+        return extra
+
diff --git a/ietf/feed_urls.py b/ietf/feed_urls.py
index eea94dc7b..b46ddbe2d 100644
--- a/ietf/feed_urls.py
+++ b/ietf/feed_urls.py
@@ -1,7 +1,7 @@
 from django.conf.urls import patterns
 from django.views.generic import RedirectView
 
-from ietf.doc.feeds import DocumentChangesFeed, InLastCallFeed
+from ietf.doc.feeds import DocumentChangesFeed, InLastCallFeed, RfcFeed
 from ietf.group.feeds import GroupChangesFeed
 from ietf.iesg.feeds import IESGAgendaFeed
 from ietf.ipr.feeds import LatestIprDisclosuresFeed
@@ -18,4 +18,5 @@ urlpatterns = patterns(
     (r'^ipr/$', LatestIprDisclosuresFeed()),
     (r'^liaison/(?P<kind>recent|from|to|subject)/(?:(?P<search>[^/]+)/)?$', LiaisonStatementsFeed()),
     (r'^wg-proceedings/$', LatestMeetingMaterialFeed()),
+    (r'^rfc/$', RfcFeed())
 )