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import datetime
from podcasts.models import Episode, Podcast
from django.contrib.syndication.views import Feed
from django.contrib.sites.shortcuts import get_current_site
from django.views.generic.base import RedirectView
from django.utils.feedgenerator import rfc2822_date, Rss201rev2Feed, Atom1Feed
from django.shortcuts import get_object_or_404
from .models import MIME_CHOICES
class ITunesElements(object):
def add_root_elements(self, handler):
""" Add additional elements to the podcast object"""
super(ITunesElements, self).add_root_elements(handler)
podcast = self.feed["podcast"]
if podcast.featured_image:
# grab thumbs here
#itunes_sm_url = thumbnailer.get_thumbnail(aliases["itunes_sm"]).url
#itunes_lg_url = thumbnailer.get_thumbnail(aliases["itunes_lg"]).url
if itunes_sm_url and itunes_lg_url:
handler.addQuickElement("itunes:image", attrs={"href": itunes_lg_url})
handler.startElement("image", {})
handler.addQuickElement("url", itunes_sm_url)
handler.addQuickElement("title", self.feed["title"])
handler.addQuickElement("link", self.feed["link"])
handler.endElement("image")
handler.addQuickElement("guid", str(podcast.uuid), attrs={"isPermaLink": "false"})
handler.addQuickElement("itunes:subtitle", self.feed["subtitle"])
handler.addQuickElement("itunes:author", podcast.publisher)
handler.startElement("itunes:owner", {})
handler.addQuickElement("itunes:name", podcast.publisher)
handler.addQuickElement("itunes:email", podcast.publisher_email)
handler.endElement("itunes:owner")
handler.addQuickElement("itunes:category", attrs={"text": self.feed["categories"][0]})
handler.addQuickElement("itunes:summary", podcast.description)
handler.addQuickElement("itunes:explicit", "no")
handler.addQuickElement("keywords", podcast.keywords)
try:
handler.addQuickElement("lastBuildDate",
rfc2822_date(podcast.episode_set.filter(status=1)[1].pub_date))
except IndexError:
pass
handler.addQuickElement("generator", "Luxagraf's Django Web Framework")
handler.addQuickElement("docs", "http://blogs.law.harvard.edu/tech/rss")
def add_item_elements(self, handler, item):
""" Add additional elements to the episode object"""
super(ITunesElements, self).add_item_elements(handler, item)
podcast = item["podcast"]
episode = item["episode"]
if episode.featured_image:
#grab episode thumbs
#itunes_sm_url = None
#itunes_lg_url = None
if itunes_sm_url and itunes_lg_url:
handler.addQuickElement("itunes:image", attrs={"href": itunes_lg_url})
handler.startElement("image", {})
handler.addQuickElement("url", itunes_sm_url)
handler.addQuickElement("title", episode.title)
handler.addQuickElement("link", episode.get_absolute_url())
handler.endElement("image")
handler.addQuickElement("guid", str(episode.uuid), attrs={"isPermaLink": "false"})
handler.addQuickElement("copyright", "{0} {1}".format(podcast.license,
datetime.date.today().year))
handler.addQuickElement("itunes:author", episode.podcast.publisher)
handler.addQuickElement("itunes:subtitle", episode.subtitle)
handler.addQuickElement("itunes:summary", episode.description)
handler.addQuickElement("itunes:duration", "%02d:%02d:%02d" % (episode.hours,
episode.minutes,
episode.seconds))
handler.addQuickElement("itunes:keywords", episode.keywords)
handler.addQuickElement("itunes:explicit", "no")
if episode.block:
handler.addQuickElement("itunes:block", "yes")
def namespace_attributes(self):
return {"xmlns:itunes": "http://www.itunes.com/dtds/podcast-1.0.dtd"}
class AtomITunesFeedGenerator(ITunesElements, Atom1Feed):
def root_attributes(self):
atom_attrs = super(AtomITunesFeedGenerator, self).root_attributes()
atom_attrs.update(self.namespace_attributes())
return atom_attrs
class RssITunesFeedGenerator(ITunesElements, Rss201rev2Feed):
def rss_attributes(self):
rss_attrs = super(RssITunesFeedGenerator, self).rss_attributes()
rss_attrs.update(self.namespace_attributes())
return rss_attrs
class ShowFeed(Feed):
"""
A feed of podcasts for iTunes and other compatible podcatchers.
"""
def title(self, podcast):
return podcast.title
def link(self, podcast):
return podcast.get_absolute_url()
def categories(self, podcast):
return ("Music",)
def feed_copyright(self, podcast):
return "{0} {1}".format(podcast.license, datetime.date.today().year)
def ttl(self, podcast):
return podcast.ttl
def items(self, podcast):
return podcast.episode_set.filter(status=1)[:300]
def get_object(self, request, *args, **kwargs):
self.mime = [mc[0] for mc in MIME_CHOICES if mc[0] == kwargs["mime_type"]][0]
site = get_current_site(request)
self.podcast = get_object_or_404(Podcast, slug=kwargs["show_slug"])
return self.podcast
def item_title(self, episode):
return episode.title
def item_description(self, episode):
"renders summary for atom"
return episode.description
def item_link(self, episode):
return reverse("podcasting_episode_detail",
kwargs={"podcast_slug": self.podcast.slug, "slug": episode.slug})
# def item_author_link(self, episode):
# return "todo" #this one doesn't add anything in atom or rss
#
# def item_author_email(self, episode):
# return "todo" #this one doesn't add anything in atom or rss
def item_pubdate(self, episode):
return episode.pub_date
def item_categories(self, episode):
return self.categories(self.podcast)
def item_enclosure_url(self, episode):
try:
e = episode.enclosure_set.get(mime=self.mime)
return e.url
except Enclosure.DoesNotExist:
pass
def item_enclosure_length(self, episode):
try:
e = episode.enclosure_set.get(mime=self.mime)
return e.size
except Enclosure.DoesNotExist:
pass
def item_enclosure_mime_type(self, episode):
try:
e = episode.enclosure_set.get(mime=self.mime)
return e.get_mime_display()
except Enclosure.DoesNotExist:
pass
def item_keywords(self, episode):
return episode.keywords
def feed_extra_kwargs(self, obj):
extra = {}
extra["podcast"] = self.podcast
return extra
def item_extra_kwargs(self, item):
extra = {}
extra["podcast"] = self.podcast
extra["episode"] = item
return extra
class AtomShowFeed(ShowFeed):
feed_type = AtomITunesFeedGenerator
def subtitle(self, show):
return show.subtitle
def author_name(self, show):
return show.publisher
def author_email(self, show):
return show.publisher_email
def author_link(self, show):
return show.get_absolute_url()
class RssShowFeed(ShowFeed):
feed_type = RssITunesFeedGenerator
def item_guid(self, episode):
"ITunesElements can't add isPermaLink attr unless None is returned here."
return None
def description(self, show):
return show.description
class AtomRedirectView(RedirectView):
permanent = False
def get_redirect_url(self, show_slug, mime_type):
return reverse(
"podcasts_show_feed_atom",
kwargs={"show_slug": show_slug, "mime_type": mime_type})
class RssRedirectView(RedirectView):
permanent = False
def get_redirect_url(self, show_slug, mime_type):
return reverse(
"podcasts_show_feed_rss",
kwargs={"show_slug": show_slug, "mime_type": mime_type})
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